fix vacuous e2e dedupe assertion

# Conflicts:
#	internal/virtual/engine.go
#	internal/virtual/engine_test.go

PLAN.md

@@ -672,7 +672,7 @@ func TestMain(m *testing.M) {
 
 ```hcl
 provider "artifactapi" {
-  endpoint = "https://artifactapi.example.com"
+  endpoint = "https://artifactapi.k8s.syd1.au.unkin.net"
 }
 
 resource "artifactapi_remote" "terraform_registry" {

README.md

@@ -20,25 +20,98 @@ API: `http://localhost:8000` | Frontend: `http://localhost:5173`
 
 ## Package Types
 
+| Type | Mutable (auto-detected) | Immutable (auto-detected) |
+|---|---|---|
+| `generic` | nothing | everything |
+| `docker` | tag manifests, `/tags/list` | blobs, digest manifests |
+| `helm` | `index.yaml` | `.tgz` charts |
+| `pypi` | `simple/*` index pages | `.whl`, `.tar.gz` |
+| `npm` | package metadata | `.tgz` tarballs |
+| `rpm` | `repomd.xml`, `repodata/*` | `.rpm` |
+| `alpine` | `APKINDEX.tar.gz` | `.apk` |
+| `puppet` | `v3/modules/*`, `v3/releases*` | `.tar.gz` |
+| `terraform` | `*/versions` | `*/download/*/*` |
+| `goproxy` | `@v/list`, `@latest` | `.info`, `.mod`, `.zip` |
+| `cargo` | sparse index files (`config.json` synthesized) | `crates/*/*.crate` |
+| `nuget` | `index.json` (service index), registration and flat container indexes | `.nupkg`, `.nuspec` |
+| `github_rpm` | `repodata/*` (synthesized) | `.rpm` (redirected) |
+
 Providers classify paths automatically. Users only configure what to proxy and TTLs.
 
-Classification precedence, TTLs and eviction for every remote: [docs/common/caching.md](docs/common/caching.md).
+### `github_rpm` — GitHub releases as a yum repo (metadata-only, no precache)
 
-Each type's paths, Terraform examples and local/virtual behaviour are in `docs/<type>/`:
+A `github_rpm` remote turns a GitHub repo's **releases** into a real `dnf`/`yum`
+repository without ever caching the packages. It scans releases for `.rpm`
+assets, derives each package's metadata (NEVRA, requires/provides/conflicts/
+obsoletes, files, checksum) and **synthesizes `repodata/` on the fly**. Package
+metadata comes from a **ranged GET of just the RPM header** (the header sits at
+the front of the file, so the whole package is never downloaded); the sha256
+checksum comes from the GitHub asset `digest` when present, else a one-time
+lazy stream. Derived metadata is cached (keyed by asset) so repodata generation
+is served from primed DB rows, never a cold on-demand derive.
 
-- `alpine`: [remote](docs/alpine/remote.md), [remote-github](docs/alpine/remote-github.md)
-- `cargo`: [remote](docs/cargo/remote.md)
-- `deb`: [remote](docs/deb/remote.md), [remote-github](docs/deb/remote-github.md)
-- `docker`: [remote](docs/docker/remote.md), [local](docs/docker/local.md)
-- `generic`: [remote](docs/generic/remote.md)
-- `goproxy`: [remote](docs/goproxy/remote.md)
-- `helm`: [remote](docs/helm/remote.md), [local](docs/helm/local.md), [virtual](docs/helm/virtual.md)
-- `npm`: [remote](docs/npm/remote.md)
-- `nuget`: [remote](docs/nuget/remote.md)
-- `puppet`: [remote](docs/puppet/remote.md), [local](docs/puppet/local.md)
-- `pypi`: [remote](docs/pypi/remote.md)
-- `rpm`: [remote](docs/rpm/remote.md), [remote-github](docs/rpm/remote-github.md)
-- `terraform`: [remote](docs/terraform/remote.md), [local](docs/terraform/local.md)
+Each package's `<location>` points back at the remote, which **302-redirects**
+the download to the `releases_remote` — an existing generic `github.com` remote
+that streams the actual bytes. `dnf` follows the redirect transparently.
+
+#### Background syncer
+
+A single process-wide **background syncer** keeps every `github_rpm` remote's
+derived metadata current off the client request path:
+
+- **Prime on create.** Creating a `github_rpm` remote enqueues a background prime
+  scan, so its metadata is derived right away without blocking the create call.
+  The first `dnf` request is served from cache. If a request arrives before the
+  prime lands, it returns a retryable `503` (with `Retry-After`) rather than
+  serving an empty repo or blocking on a multi-minute derive.
+- **Periodic re-check, driven by `mutable_ttl`.** Each remote is re-checked for
+  new or changed releases no more often than its `mutable_ttl`. New/changed
+  assets are derived incrementally; assets already cached are never re-fetched,
+  and assets that disappear upstream are pruned.
+- **ETag / 304 conditional requests.** The releases-list `ETag` is stored per
+  remote and sent as `If-None-Match`; a `304 Not Modified` means nothing changed
+  and the syncer derives nothing. GitHub does not count `304` conditional
+  responses against the rate limit, so an unchanged repo is nearly free — this is
+  the main lever keeping GitHub traffic low.
+- **Global rate limit.** Every GitHub call (releases list + each ranged asset
+  header GET) passes through a single token-bucket limiter **shared across all
+  remotes**, so GitHub is never hammered. Configure a token (`password`) on the
+  remote for the higher authenticated rate limit (~5000/hr vs ~60/hr
+  unauthenticated).
+- **Multi-replica coordination.** State is shared through the database. Before a
+  periodic scan a replica must atomically claim a per-remote lease
+  (`github_rpm_sync_state`: `last_synced_at`, `etag`, `sync_lease_owner`,
+  `sync_lease_expires`); only the winner scans. This bounds total GitHub load to
+  ~once per `mutable_ttl` regardless of replica count, and the shared `etag`
+  lets any replica issue the conditional request.
+
+```hcl
+# Backend that serves the actual .rpm bytes from github.com.
+resource "artifactapi_remote_generic" "github" {
+  name     = "github"
+  base_url = "https://github.com"
+  patterns = [
+    "acme/tools/releases/download/.*\\.rpm$", # allowlist the repo's release assets
+  ]
+}
+
+resource "artifactapi_remote_github_rpm" "acme-tools" {
+  name            = "acme-tools"
+  base_url        = "https://api.github.com/repos/acme/tools" # the releases API root
+  releases_remote = "github"                                  # backend for downloads
+  mutable_ttl     = 3600                                      # release re-scan interval
+
+  # Optional: restrict which release assets become packages (regex on filename).
+  patterns = [".*\\.x86_64\\.rpm$", ".*\\.noarch\\.rpm$"]
+
+  # Optional: a token for private repos / higher API rate limits.
+  # password = "ghp_..."
+}
+```
+
+`dnf` config: `baseurl=https://artifactapi.example/api/v1/remote/acme-tools`.
+The repo is multi-arch (no `$basearch` needed) — `dnf` selects matching packages
+from the synthesized metadata.
 
 ### GitHub authentication
 
@@ -107,9 +180,105 @@ GITHUB_APP_PRIVATE_KEY_PATH=/etc/artifactapi/github-app.pem
 
 ## Terraform
 
-Remotes and virtuals are managed by Terraform. Each package type has its own resource; see `docs/<type>/` for examples.
+Remotes and virtuals are managed by Terraform. Each package type has its own resource:
 
-Provider: [terraform-provider-artifactapi](https://git.unkin.net/unkin/terraform-provider-artifactapi)
+```hcl
+resource "artifactapi_remote_generic" "github" {
+  name     = "github"
+  base_url = "https://github.com"
+
+  immutable_ttl = 0
+  mutable_ttl   = 7200
+
+  patterns = [
+    "ducaale/xh/.*/xh-.*-x86_64-unknown-linux-musl.tar.gz$",
+    "mikefarah/yq/.*/yq_linux_amd64$",
+  ]
+
+  mutable_patterns = [
+    ".*/archive/refs/heads/.*\\.tar\\.gz$",
+  ]
+}
+
+resource "artifactapi_remote_docker" "dockerhub" {
+  name     = "dockerhub"
+  base_url = "https://registry-1.docker.io"
+
+  immutable_ttl    = 0
+  mutable_ttl      = 300
+  ban_tags_enabled = true
+  ban_tags         = ["latest"]
+
+  patterns = [
+    "^library/postgres",
+    "^library/redis",
+  ]
+}
+
+resource "artifactapi_remote_helm" "jetstack" {
+  name     = "jetstack"
+  base_url = "https://charts.jetstack.io"
+
+  immutable_ttl = 0
+  mutable_ttl   = 3600
+}
+
+resource "artifactapi_virtual" "helm" {
+  name         = "helm"
+  package_type = "helm"
+  members      = [artifactapi_remote_helm.jetstack.name]
+}
+```
+
+Provider: [terraform-provider-artifactapi](../terraform-provider-artifactapi)
+
+### Serving providers as a registry
+
+A local `terraform` repo is a real provider registry: upload
+`terraform-provider-{type}_{version}_{os}_{arch}.zip` files under
+`{namespace}/{type}/`, and Terraform installs them from a bare source address —
+no `.terraformrc` mirror config:
+
+```hcl
+terraform {
+  required_providers {
+    artifactapi = {
+      source  = "artifactapi.k8s.syd1.au.unkin.net/<repo>/<type>"
+      version = "0.1.2"
+    }
+  }
+}
+```
+
+The Terraform *namespace* segment is the artifactapi repo name; the provider is
+matched by *type*. The registry serves service discovery
+(`/.well-known/terraform.json`), the `providers.v1` version/download endpoints,
+and a GPG-signed `SHA256SUMS` per the provider registry protocol.
+
+Signing needs a GPG key. By default artifactapi generates one on first start and
+stores it in the database (`signing_keys` table), so every replica shares it and
+there's nothing to provision. To bring your own key instead, point
+`TF_SIGNING_KEY_PATH` at an armored private key (optionally
+`TF_SIGNING_KEY_PASSPHRASE`), which takes precedence over the generated one.
+`TF_PROVIDER_PROTOCOLS` (default `5.0,6.0`) sets the advertised plugin protocols.
+
+### Local docker registry
+
+A local `docker` repo is a real container registry, not a mirror: it serves the
+Docker Registry HTTP API V2 for both push and pull, so any client (`docker`,
+`podman`, `skopeo`, `buildah`) can use it directly.
+
+```sh
+docker tag myapp:latest artifactapi.k8s.syd1.au.unkin.net/docker-internal/myapp:latest
+docker push        artifactapi.k8s.syd1.au.unkin.net/docker-internal/myapp:latest
+docker pull        artifactapi.k8s.syd1.au.unkin.net/docker-internal/myapp:latest
+```
+
+The first path segment after `/v2/` is the artifactapi repo name; the remainder
+is the image name. Blobs and manifests are stored through the shared
+content-addressable store (deduplicated by digest, reaped by GC once
+unreferenced); tags are mutable references and re-pushing a tag moves it. Blob
+uploads support both the monolithic and chunked (`POST`/`PATCH`/`PUT`) flows.
 
 ## Access Control
 

docs/alpine/remote-github.md

@@ -1,7 +0,0 @@
-# `github_alpine` remote
-
-Shared classification, TTL and eviction rules: [caching](../common/caching.md).
-
-| Type | Mutable (auto-detected) | Immutable (auto-detected) |
-|---|---|---|
-| `github_alpine` | `APKINDEX.tar.gz` (synthesized) | `.apk` (redirected) |

docs/alpine/remote.md

@@ -1,7 +0,0 @@
-# `alpine` remote
-
-Shared classification, TTL and eviction rules: [caching](../common/caching.md).
-
-| Type | Mutable (auto-detected) | Immutable (auto-detected) |
-|---|---|---|
-| `alpine` | `APKINDEX.tar.gz` | `.apk` |

docs/cargo/remote.md

@@ -1,7 +0,0 @@
-# `cargo` remote
-
-Shared classification, TTL and eviction rules: [caching](../common/caching.md).
-
-| Type | Mutable (auto-detected) | Immutable (auto-detected) |
-|---|---|---|
-| `cargo` | sparse index files (`config.json` synthesized) | `crates/*/*.crate` |

docs/common/caching.md

@@ -1,100 +0,0 @@
-# Caching and classification (all remotes)
-
-Every proxied request on a remote is classified as **denied**, **immutable** or
-**mutable**. The class picks the storage path and the freshness TTL.
-
-## Fields
-
-| Field | Meaning |
-|---|---|
-| `patterns` | Allowlist of regexes. Empty allows every path; otherwise a non-matching path is denied (403). |
-| `blocklist` | Regexes; a match is denied (403). |
-| `immutable_patterns` | Regexes forcing a path immutable. |
-| `mutable_patterns` | Regexes forcing a path mutable. |
-| `immutable_ttl` | Seconds an immutable path stays fresh. `0` = forever. |
-| `mutable_ttl` | Seconds a mutable path stays fresh. `0` also means never expires, and the API stores `0` when the field is omitted. |
-| `check_mutable` | Stores the upstream ETag and tries a conditional `HEAD` (`If-None-Match`) when a mutable path is fetched. The ETag expires with the `mutable_ttl` freshness key, so an expired mutable path is refetched in full, not revalidated. |
-| `stale_on_error` | On an upstream network error, serve the stored copy instead of failing. |
-| `quarantine_enabled` / `quarantine_days` | Stored on the remote but not enforced by the proxy yet. |
-| `mirrorlist` / `mirror_strategy` | rpm/deb/alpine only. Upstream pool is `[base_url] + mirrorlist`; `round_robin` (default) rotates the starting mirror, `least_conn` starts at the one with the fewest in-flight requests. Network errors and 5xx fail over to the next mirror; other statuses return as-is. |
-
-## Precedence
-
-The first rule that matches wins:
-
-1. `blocklist` matches: **denied**
-2. `patterns` is non-empty and nothing matches: **denied**
-3. `immutable_patterns` matches: **immutable**
-4. `mutable_patterns` matches: **mutable**
-5. the provider's built-in `Classify` says mutable: **mutable**
-6. anything else: **immutable**
-
-So `blocklist` beats the allowlist, and `immutable_patterns` beats
-`mutable_patterns`. Either user list overrides the built-in rules. `GET` and
-`HEAD` both apply this order.
-
-## Matching rules
-
-- Regexes are Go `regexp`, matched **unanchored** (`MatchString`). Add `^` or `$` yourself when you need them.
-- They match the path after `/api/v1/remote/<name>/`, without a leading slash, e.g. `9/BaseOS/x86_64/os/repodata/repomd.xml`.
-- The query string is not part of the path. It is dropped and not forwarded upstream.
-- `create` and `update` reject an invalid regex in `patterns`, `blocklist`, `mutable_patterns`, `immutable_patterns` or `ban_tags` with a 400. Only invalid regexes already stored before that check are skipped at match time.
-
-## Lifecycles
-
-| | Immutable | Mutable |
-|---|---|---|
-| Stored as | content-addressed blob (sha256), streamed | per-path index object, buffered and rewritten by the provider |
-| Fresh for | `immutable_ttl` (`0` = forever) | `mutable_ttl` |
-| After expiry | refetched from upstream | refetched from upstream (the ETag expires with the TTL, so `check_mutable` does not revalidate it) |
-| Upstream down | `stale_on_error` serves the stored copy and re-arms the TTL; an open circuit breaker always serves stale if a copy exists, else 503 | same |
-
-Concurrent misses on one path share a fetch lock. Waiters poll the store for
-up to 5s instead of all going upstream.
-
-## Eviction
-
-```sh
-curl -X DELETE https://artifactapi.example.com/api/v2/remotes/<name>/objects/<path>
-curl -X DELETE https://artifactapi.example.com/api/v2/remotes/<name>/objects/<dir>/*
-```
-
-- Evict drops the artifact row, the index object and the Redis TTL and ETag keys, so the next request goes upstream whatever the class or TTL.
-- A single-path evict takes the fetch lock first, so an in-flight fetch can't re-cache the path. It returns 503 if the lock stays busy.
-- A wildcard must end in `<dir>/*` and takes no lock.
-- Returns 204, or 404 for an unknown remote.
-
-## Examples
-
-Bodies for `POST https://artifactapi.example.com/api/v2/remotes`.
-
-GitHub release assets through a `generic` remote, allowlisted:
-
-```json
-{"name": "github", "package_type": "generic", "base_url": "https://github.com",
- "immutable_ttl": 0, "mutable_ttl": 7200,
- "patterns": ["^mikefarah/yq/releases/download/.*/yq_linux_amd64$"]}
-```
-
-rpm remote: `repodata/*` and `repomd.xml` are mutable by default, so only the TTLs are needed:
-
-```json
-{"name": "almalinux", "package_type": "rpm", "base_url": "https://repo.almalinux.org/almalinux",
- "immutable_ttl": 0, "mutable_ttl": 3600, "check_mutable": true, "stale_on_error": true}
-```
-
-Force a moving path mutable, e.g. branch tarballs on `generic`:
-
-```json
-{"mutable_patterns": ["/archive/refs/heads/.*\\.tar\\.gz$"], "mutable_ttl": 600}
-```
-
-## Built-in classification per type
-
-Each type's page lists its auto-detected mutable and immutable paths:
-[alpine](../alpine/remote.md), [alpine github](../alpine/remote-github.md),
-[cargo](../cargo/remote.md), [deb](../deb/remote.md), [deb github](../deb/remote-github.md),
-[docker](../docker/remote.md), [generic](../generic/remote.md), [goproxy](../goproxy/remote.md),
-[helm](../helm/remote.md), [npm](../npm/remote.md), [nuget](../nuget/remote.md),
-[puppet](../puppet/remote.md), [pypi](../pypi/remote.md), [rpm](../rpm/remote.md),
-[rpm github](../rpm/remote-github.md), [terraform](../terraform/remote.md).

docs/deb/remote-github.md

@@ -1,7 +0,0 @@
-# `github_deb` remote
-
-Shared classification, TTL and eviction rules: [caching](../common/caching.md).
-
-| Type | Mutable (auto-detected) | Immutable (auto-detected) |
-|---|---|---|
-| `github_deb` | `Packages*`, `Release*` (synthesized) | `.deb` (redirected) |

docs/deb/remote.md

@@ -1,7 +0,0 @@
-# `deb` remote
-
-Shared classification, TTL and eviction rules: [caching](../common/caching.md).
-
-| Type | Mutable (auto-detected) | Immutable (auto-detected) |
-|---|---|---|
-| `deb` | `Packages*`, `Sources*`, `Release`, `InRelease`, `Release.gpg`, `Contents-*` | `.deb` |

docs/docker/local.md

@@ -1,17 +0,0 @@
-# Local docker registry
-
-A local `docker` repo is a real container registry, not a mirror: it serves the
-Docker Registry HTTP API V2 for both push and pull, so any client (`docker`,
-`podman`, `skopeo`, `buildah`) can use it directly.
-
-```sh
-docker tag myapp:latest artifactapi.example.com/docker-internal/myapp:latest
-docker push        artifactapi.example.com/docker-internal/myapp:latest
-docker pull        artifactapi.example.com/docker-internal/myapp:latest
-```
-
-The first path segment after `/v2/` is the artifactapi repo name; the remainder
-is the image name. Blobs and manifests are stored through the shared
-content-addressable store (deduplicated by digest, reaped by GC once
-unreferenced); tags are mutable references and re-pushing a tag moves it. Blob
-uploads support both the monolithic and chunked (`POST`/`PATCH`/`PUT`) flows.

docs/docker/remote.md

@@ -1,26 +0,0 @@
-# `docker` remote
-
-Shared classification, TTL and eviction rules: [caching](../common/caching.md).
-
-| Type | Mutable (auto-detected) | Immutable (auto-detected) |
-|---|---|---|
-| `docker` | tag manifests, `/tags/list` | blobs, digest manifests |
-
-## Terraform
-
-```hcl
-resource "artifactapi_remote_docker" "dockerhub" {
-  name     = "dockerhub"
-  base_url = "https://registry-1.docker.io"
-
-  immutable_ttl    = 0
-  mutable_ttl      = 300
-  ban_tags_enabled = true
-  ban_tags         = ["latest"]
-
-  patterns = [
-    "^library/postgres",
-    "^library/redis",
-  ]
-}
-```

docs/generic/remote.md

@@ -1,28 +0,0 @@
-# `generic` remote
-
-Shared classification, TTL and eviction rules: [caching](../common/caching.md).
-
-| Type | Mutable (auto-detected) | Immutable (auto-detected) |
-|---|---|---|
-| `generic` | nothing | everything |
-
-## Terraform
-
-```hcl
-resource "artifactapi_remote_generic" "github" {
-  name     = "github"
-  base_url = "https://github.com"
-
-  immutable_ttl = 0
-  mutable_ttl   = 7200
-
-  patterns = [
-    "ducaale/xh/.*/xh-.*-x86_64-unknown-linux-musl.tar.gz$",
-    "mikefarah/yq/.*/yq_linux_amd64$",
-  ]
-
-  mutable_patterns = [
-    ".*/archive/refs/heads/.*\\.tar\\.gz$",
-  ]
-}
-```

docs/goproxy/remote.md

@@ -1,7 +0,0 @@
-# `goproxy` remote
-
-Shared classification, TTL and eviction rules: [caching](../common/caching.md).
-
-| Type | Mutable (auto-detected) | Immutable (auto-detected) |
-|---|---|---|
-| `goproxy` | `@v/list`, `@latest` | `.info`, `.mod`, `.zip` |

docs/helm/local.md

@@ -1,15 +0,0 @@
-# Local helm repository
-
-A local `helm` repo is a real chart repository: `PUT` a packaged chart to
-`/api/v2/remotes/<repo>/files/<chart>-<version>.tgz` and `index.yaml` is
-generated from each chart's `Chart.yaml` (with sha256 digests) at
-`/api/v1/local/<repo>/index.yaml`; a file not named after its `Chart.yaml`
-name and version is stored but left out of the index. Add the local as a
-member of a helm virtual to serve it alongside remotes.
-
-```bash
-helm package ./mychart
-curl -fsSL --upload-file mychart-0.1.0.tgz \
-  https://artifactapi.example.com/api/v2/remotes/<repo>/files/mychart-0.1.0.tgz
-helm repo add <repo> https://artifactapi.example.com/api/v1/local/<repo>
-```

docs/helm/remote.md

@@ -1,19 +0,0 @@
-# `helm` remote
-
-Shared classification, TTL and eviction rules: [caching](../common/caching.md).
-
-| Type | Mutable (auto-detected) | Immutable (auto-detected) |
-|---|---|---|
-| `helm` | `index.yaml` | `.tgz` charts |
-
-## Terraform
-
-```hcl
-resource "artifactapi_remote_helm" "jetstack" {
-  name     = "jetstack"
-  base_url = "https://charts.jetstack.io"
-
-  immutable_ttl = 0
-  mutable_ttl   = 3600
-}
-```

docs/helm/virtual.md

@@ -1,9 +0,0 @@
-# `helm` virtual
-
-```hcl
-resource "artifactapi_virtual" "helm" {
-  name         = "helm"
-  package_type = "helm"
-  members      = [artifactapi_remote_helm.jetstack.name]
-}
-```

docs/npm/remote.md

@@ -1,7 +0,0 @@
-# `npm` remote
-
-Shared classification, TTL and eviction rules: [caching](../common/caching.md).
-
-| Type | Mutable (auto-detected) | Immutable (auto-detected) |
-|---|---|---|
-| `npm` | package metadata | `.tgz` tarballs |

docs/nuget/remote.md

@@ -1,7 +0,0 @@
-# `nuget` remote
-
-Shared classification, TTL and eviction rules: [caching](../common/caching.md).
-
-| Type | Mutable (auto-detected) | Immutable (auto-detected) |
-|---|---|---|
-| `nuget` | `index.json` (service index), registration and flat container indexes | `.nupkg`, `.snupkg`, `.nuspec`, `readme`, `icon` |

docs/puppet/local.md

@@ -1,14 +0,0 @@
-# Local puppet forge
-
-A local `puppet` repo is a Forge: `PUT` a module tarball to
-`/api/v2/remotes/<repo>/files/<owner>-<module>-<version>.tar.gz` and the Forge
-v3 API (`/v3/modules`, `/v3/releases`, `/v3/files`) is served from each
-release's `metadata.json` at `/api/v1/local/<repo>`. Versions are immutable.
-
-```bash
-puppet module build ./hello
-curl -fsSL --upload-file pkg/unkin-hello-0.1.0.tar.gz \
-  https://artifactapi.example.com/api/v2/remotes/<repo>/files/unkin-hello-0.1.0.tar.gz
-puppet module install unkin-hello \
-  --module_repository https://artifactapi.example.com/api/v1/local/<repo>
-```

docs/puppet/remote.md

@@ -1,7 +0,0 @@
-# `puppet` remote
-
-Shared classification, TTL and eviction rules: [caching](../common/caching.md).
-
-| Type | Mutable (auto-detected) | Immutable (auto-detected) |
-|---|---|---|
-| `puppet` | `v3/modules/*`, `v3/releases*` | `.tar.gz` |

docs/pypi/remote.md

@@ -1,7 +0,0 @@
-# `pypi` remote
-
-Shared classification, TTL and eviction rules: [caching](../common/caching.md).
-
-| Type | Mutable (auto-detected) | Immutable (auto-detected) |
-|---|---|---|
-| `pypi` | `simple/*` index pages | `.whl`, `.tar.gz` |

docs/rpm/remote-github.md

@@ -1,82 +0,0 @@
-# `github_rpm` remote
-
-Shared classification, TTL and eviction rules: [caching](../common/caching.md).
-
-| Type | Mutable (auto-detected) | Immutable (auto-detected) |
-|---|---|---|
-| `github_rpm` | `repodata/*` (synthesized) | `.rpm` (redirected) |
-
-## GitHub releases as a yum repo (metadata-only, no precache)
-
-A `github_rpm` remote turns a GitHub repo's **releases** into a real `dnf`/`yum`
-repository without ever caching the packages. It scans releases for `.rpm`
-assets, derives each package's metadata (NEVRA, requires/provides/conflicts/
-obsoletes, files, checksum) and **synthesizes `repodata/` on the fly**. Package
-metadata comes from a **ranged GET of just the RPM header** (the header sits at
-the front of the file, so the whole package is never downloaded); the sha256
-checksum comes from the GitHub asset `digest` when present, else a one-time
-lazy stream. Derived metadata is cached (keyed by asset) so repodata generation
-is served from primed DB rows, never a cold on-demand derive.
-
-Each package's `<location>` points back at the remote, which **302-redirects**
-the download to the `releases_remote` — an existing generic `github.com` remote
-that streams the actual bytes. `dnf` follows the redirect transparently.
-
-### Background syncer
-
-A single process-wide **background syncer** keeps every `github_rpm` remote's
-derived metadata current off the client request path:
-
-- **Prime on create.** Creating a `github_rpm` remote enqueues a background prime
-  scan, so its metadata is derived right away without blocking the create call.
-  The first `dnf` request is served from cache. If a request arrives before the
-  prime lands, it returns a retryable `503` (with `Retry-After`) rather than
-  serving an empty repo or blocking on a multi-minute derive.
-- **Periodic re-check, driven by `mutable_ttl`.** Each remote is re-checked for
-  new or changed releases no more often than its `mutable_ttl`. New/changed
-  assets are derived incrementally; assets already cached are never re-fetched,
-  and assets that disappear upstream are pruned.
-- **ETag / 304 conditional requests.** The releases-list `ETag` is stored per
-  remote and sent as `If-None-Match`; a `304 Not Modified` means nothing changed
-  and the syncer derives nothing. GitHub does not count `304` conditional
-  responses against the rate limit, so an unchanged repo is nearly free — this is
-  the main lever keeping GitHub traffic low.
-- **Global rate limit.** Every GitHub call (releases list + each ranged asset
-  header GET) passes through a single token-bucket limiter **shared across all
-  remotes**, so GitHub is never hammered. Configure a token (`password`) on the
-  remote for the higher authenticated rate limit (~5000/hr vs ~60/hr
-  unauthenticated).
-- **Multi-replica coordination.** State is shared through the database. Before a
-  periodic scan a replica must atomically claim a per-remote lease
-  (`github_rpm_sync_state`: `last_synced_at`, `etag`, `sync_lease_owner`,
-  `sync_lease_expires`); only the winner scans. This bounds total GitHub load to
-  ~once per `mutable_ttl` regardless of replica count, and the shared `etag`
-  lets any replica issue the conditional request.
-
-```hcl
-# Backend that serves the actual .rpm bytes from github.com.
-resource "artifactapi_remote_generic" "github" {
-  name     = "github"
-  base_url = "https://github.com"
-  patterns = [
-    "acme/tools/releases/download/.*\\.rpm$", # allowlist the repo's release assets
-  ]
-}
-
-resource "artifactapi_remote_github_rpm" "acme-tools" {
-  name            = "acme-tools"
-  base_url        = "https://api.github.com/repos/acme/tools" # the releases API root
-  releases_remote = "github"                                  # backend for downloads
-  mutable_ttl     = 3600                                      # release re-scan interval
-
-  # Optional: restrict which release assets become packages (regex on filename).
-  patterns = [".*\\.x86_64\\.rpm$", ".*\\.noarch\\.rpm$"]
-
-  # Optional: a token for private repos / higher API rate limits.
-  # password = "ghp_..."
-}
-```
-
-`dnf` config: `baseurl=https://artifactapi.example/api/v1/remote/acme-tools`.
-The repo is multi-arch (no `$basearch` needed) — `dnf` selects matching packages
-from the synthesized metadata.

docs/rpm/remote.md

@@ -1,7 +0,0 @@
-# `rpm` remote
-
-Shared classification, TTL and eviction rules: [caching](../common/caching.md).
-
-| Type | Mutable (auto-detected) | Immutable (auto-detected) |
-|---|---|---|
-| `rpm` | `repomd.xml`, `repodata/*` | `.rpm` |

docs/terraform/local.md

@@ -1,29 +0,0 @@
-# Serving providers as a registry
-
-A local `terraform` repo is a real provider registry: upload
-`terraform-provider-{type}_{version}_{os}_{arch}.zip` files under
-`{namespace}/{type}/`, and Terraform installs them from a bare source address —
-no `.terraformrc` mirror config:
-
-```hcl
-terraform {
-  required_providers {
-    artifactapi = {
-      source  = "artifactapi.example.com/<repo>/<type>"
-      version = "0.1.2"
-    }
-  }
-}
-```
-
-The Terraform *namespace* segment is the artifactapi repo name; the provider is
-matched by *type*. The registry serves service discovery
-(`/.well-known/terraform.json`), the `providers.v1` version/download endpoints,
-and a GPG-signed `SHA256SUMS` per the provider registry protocol.
-
-Signing needs a GPG key. By default artifactapi generates one on first start and
-stores it in the database (`signing_keys` table), so every replica shares it and
-there's nothing to provision. To bring your own key instead, point
-`TF_SIGNING_KEY_PATH` at an armored private key (optionally
-`TF_SIGNING_KEY_PASSPHRASE`), which takes precedence over the generated one.
-`TF_PROVIDER_PROTOCOLS` (default `5.0,6.0`) sets the advertised plugin protocols.

docs/terraform/remote.md

@@ -1,7 +0,0 @@
-# `terraform` remote
-
-Shared classification, TTL and eviction rules: [caching](../common/caching.md).
-
-| Type | Mutable (auto-detected) | Immutable (auto-detected) |
-|---|---|---|
-| `terraform` | `*/versions` | `*/download/*/*` |

e2e-docker/README.md

@@ -22,11 +22,11 @@ already-running stack.
 ## Coverage
 
 - **Repository lifecycle** — add / change / delete for remote, local and virtual repos.
-- **Caching** — one immutable artifact per remote package type (one
-  `caching_<type>_test.go` case each) proxied through the mock upstream: first fetch `X-Artifact-Source: remote`, second `cache`, bytes
+- **Caching** — one immutable artifact per remote package type (generic, docker,
+  helm, pypi, npm, rpm, alpine, puppet, terraform, goproxy, cargo, nuget) proxied through the
+  mock upstream: first fetch `X-Artifact-Source: remote`, second `cache`, bytes
   verified against the origin fixture.
-- **Local uploads** — puppet (Forge v3 API via real `r10k` and `puppet module install`),
-  generic (upload/download), pypi (wheel + generated `simple/`
+- **Local uploads** — generic (upload/download), pypi (wheel + generated `simple/`
   index), rpm (real package + **automatic repodata** generation).
 - **Virtual repositories** — pypi simple-index merge and helm `index.yaml` merge
   across two members.

e2e-docker/caching_alpine_test.go

@@ -1,7 +0,0 @@
-//go:build dockere2e
-
-package e2edocker
-
-func init() {
-	cachingCases = append(cachingCases, cachingCase{"alpine", "alpine/x86_64/testpkg-1.0-r0.apk", "alpine/x86_64/testpkg-1.0-r0.apk"})
-}

e2e-docker/caching_cargo_test.go

@@ -1,7 +0,0 @@
-//go:build dockere2e
-
-package e2edocker
-
-func init() {
-	cachingCases = append(cachingCases, cachingCase{"cargo", "crates/mycrate/mycrate-1.0.0.crate", "crates/mycrate/mycrate-1.0.0.crate"})
-}

e2e-docker/caching_docker_test.go

@@ -1,7 +0,0 @@
-//go:build dockere2e
-
-package e2edocker
-
-func init() {
-	cachingCases = append(cachingCases, cachingCase{"docker", "library/testimg/blobs/blobdata", "v2/library/testimg/blobs/blobdata"})
-}

e2e-docker/caching_generic_test.go

@@ -1,7 +0,0 @@
-//go:build dockere2e
-
-package e2edocker
-
-func init() {
-	cachingCases = append(cachingCases, cachingCase{"generic", "blobs/hello.bin", "blobs/hello.bin"})
-}

e2e-docker/caching_goproxy_test.go

@@ -1,7 +0,0 @@
-//go:build dockere2e
-
-package e2edocker
-
-func init() {
-	cachingCases = append(cachingCases, cachingCase{"goproxy", "goproxy/example.com/mod/@v/v1.0.0.zip", "goproxy/example.com/mod/@v/v1.0.0.zip"})
-}

e2e-docker/caching_helm_test.go

@@ -1,7 +0,0 @@
-//go:build dockere2e
-
-package e2edocker
-
-func init() {
-	cachingCases = append(cachingCases, cachingCase{"helm", "charts/mychart-1.0.0.tgz", "charts/mychart-1.0.0.tgz"})
-}

e2e-docker/caching_npm_test.go

@@ -1,7 +0,0 @@
-//go:build dockere2e
-
-package e2edocker
-
-func init() {
-	cachingCases = append(cachingCases, cachingCase{"npm", "mypkg/-/mypkg-1.0.0.tgz", "mypkg/-/mypkg-1.0.0.tgz"})
-}

e2e-docker/caching_nuget_test.go

@@ -1,7 +0,0 @@
-//go:build dockere2e
-
-package e2edocker
-
-func init() {
-	cachingCases = append(cachingCases, cachingCase{"nuget", "nuget/e2epkg/1.0.0/e2epkg.1.0.0.nupkg", "nuget/e2epkg/1.0.0/e2epkg.1.0.0.nupkg"})
-}

e2e-docker/caching_puppet_test.go

@@ -1,7 +0,0 @@
-//go:build dockere2e
-
-package e2edocker
-
-func init() {
-	cachingCases = append(cachingCases, cachingCase{"puppet", "puppet-releases/author-mod-1.0.0.tar.gz", "puppet-releases/author-mod-1.0.0.tar.gz"})
-}

e2e-docker/caching_pypi_test.go

@@ -1,7 +0,0 @@
-//go:build dockere2e
-
-package e2edocker
-
-func init() {
-	cachingCases = append(cachingCases, cachingCase{"pypi", "packages/foo-1.0-py3-none-any.whl", "packages/foo-1.0-py3-none-any.whl"})
-}

e2e-docker/caching_rpm_test.go

@@ -1,7 +0,0 @@
-//go:build dockere2e
-
-package e2edocker
-
-func init() {
-	cachingCases = append(cachingCases, cachingCase{"rpm", "rpmrepo/Packages/e2e-testpkg-1.0-1.noarch.rpm", "rpmrepo/Packages/e2e-testpkg-1.0-1.noarch.rpm"})
-}

e2e-docker/caching_terraform_test.go

@@ -1,7 +0,0 @@
-//go:build dockere2e
-
-package e2edocker
-
-func init() {
-	cachingCases = append(cachingCases, cachingCase{"terraform", "hashicorp/aws/download/pkg.zip", "v1/providers/hashicorp/aws/download/pkg.zip"})
-}

e2e-docker/caching_test.go

@@ -9,23 +9,33 @@ import (
 	"testing"
 )
 
-type cachingCase struct {
-	pkgType string
-	// path is the request path under /api/v1/remote/<name>/. The provider
-	// derives the upstream URL from it (docker prepends /v2/, terraform
-	// prepends /v1/providers/), and the fixture lives at that resolved path.
-	path    string
-	fixture string
-}
-
-// cachingCases is filled by one caching_<type>_test.go file per package type.
-var cachingCases []cachingCase
-
 // TestCachingPerProvider proxies one immutable artifact for every remote
 // package type through the mock upstream and asserts: first fetch is served
 // from the remote, the second from cache, and the bytes match the origin.
 func TestCachingPerProvider(t *testing.T) {
-	for _, tc := range cachingCases {
+	cases := []struct {
+		pkgType string
+		// path is the request path under /api/v1/remote/<name>/. The provider
+		// derives the upstream URL from it (docker prepends /v2/, terraform
+		// prepends /v1/providers/), and the fixture lives at that resolved path.
+		path    string
+		fixture string
+	}{
+		{"generic", "blobs/hello.bin", "blobs/hello.bin"},
+		{"npm", "mypkg/-/mypkg-1.0.0.tgz", "mypkg/-/mypkg-1.0.0.tgz"},
+		{"helm", "charts/mychart-1.0.0.tgz", "charts/mychart-1.0.0.tgz"},
+		{"pypi", "packages/foo-1.0-py3-none-any.whl", "packages/foo-1.0-py3-none-any.whl"},
+		{"rpm", "rpmrepo/Packages/e2e-testpkg-1.0-1.noarch.rpm", "rpmrepo/Packages/e2e-testpkg-1.0-1.noarch.rpm"},
+		{"alpine", "alpine/x86_64/testpkg-1.0-r0.apk", "alpine/x86_64/testpkg-1.0-r0.apk"},
+		{"puppet", "puppet-releases/author-mod-1.0.0.tar.gz", "puppet-releases/author-mod-1.0.0.tar.gz"},
+		{"goproxy", "goproxy/example.com/mod/@v/v1.0.0.zip", "goproxy/example.com/mod/@v/v1.0.0.zip"},
+		{"cargo", "crates/mycrate/mycrate-1.0.0.crate", "crates/mycrate/mycrate-1.0.0.crate"},
+		{"nuget", "nuget/e2epkg/1.0.0/e2epkg.1.0.0.nupkg", "nuget/e2epkg/1.0.0/e2epkg.1.0.0.nupkg"},
+		{"terraform", "hashicorp/aws/download/pkg.zip", "v1/providers/hashicorp/aws/download/pkg.zip"},
+		{"docker", "library/testimg/blobs/blobdata", "v2/library/testimg/blobs/blobdata"},
+	}
+
+	for _, tc := range cases {
 		t.Run(tc.pkgType, func(t *testing.T) {
 			name := "cache-" + tc.pkgType
 			createRepo(t, fmt.Sprintf(`{

e2e-docker/helm_local_test.go

@@ -1,71 +0,0 @@
-//go:build dockere2e
-
-package e2edocker
-
-import (
-	"net/http"
-	"os"
-	"os/exec"
-	"strings"
-	"testing"
-	"time"
-)
-
-// TestLocalHelmRealClient packages a chart with the real helm CLI, publishes it
-// to a helm local, then drives helm repo add/search/pull/template against the
-// local and against a helm virtual that has the local as a member.
-func TestLocalHelmRealClient(t *testing.T) {
-	network := os.Getenv("COMPOSE_NETWORK")
-	internal := strings.TrimRight(os.Getenv("ARTIFACTAPI_INTERNAL"), "/")
-	if network == "" || internal == "" {
-		t.Skip("COMPOSE_NETWORK/ARTIFACTAPI_INTERNAL not set; run via scripts/docker-e2e.sh")
-	}
-	if _, err := exec.LookPath("docker"); err != nil {
-		t.Skip("docker not available on the test host")
-	}
-
-	createRepo(t, `{"name":"local-helm","package_type":"helm","repo_type":"local"}`)
-	defer deleteRepo(t, "local-helm")
-	createVirtual(t, `{"name":"vhelm","package_type":"helm","members":["local-helm"]}`)
-	defer deleteVirtual(t, "vhelm")
-
-	helm := func(script string) string {
-		t.Helper()
-		out, err := exec.Command("docker", "run", "--rm", "--network", network, "--entrypoint", "sh",
-			"alpine/helm:3.16.4", "-c", "set -eu; "+script).Output()
-		if err != nil {
-			stderr := ""
-			if ee, ok := err.(*exec.ExitError); ok {
-				stderr = string(ee.Stderr)
-			}
-			t.Fatalf("helm script failed: %v\n%s%s", err, out, stderr)
-		}
-		return string(out)
-	}
-
-	chart := helm("cd /tmp && helm create e2echart >/dev/null && helm package e2echart >/dev/null && cat e2echart-0.1.0.tgz")
-	uploadFile(t, "local-helm", "e2echart-0.1.0.tgz", []byte(chart), "application/gzip")
-
-	// Chart metadata is recorded asynchronously after upload; poll the index.
-	var body []byte
-	for deadline := time.Now().Add(15 * time.Second); time.Now().Before(deadline); time.Sleep(500 * time.Millisecond) {
-		var resp *http.Response
-		resp, body = doRequest(t, http.MethodGet, api("/api/v1/local/local-helm/index.yaml"), nil, "")
-		if resp.StatusCode == http.StatusOK && strings.Contains(string(body), "e2echart-0.1.0.tgz") {
-			break
-		}
-	}
-	if !strings.Contains(string(body), "e2echart-0.1.0.tgz") || !strings.Contains(string(body), "digest: ") {
-		t.Fatalf("index.yaml never listed the chart:\n%s", body)
-	}
-
-	for _, repoURL := range []string{internal + "/api/v1/local/local-helm", internal + "/api/v1/virtual/vhelm"} {
-		out := helm("helm repo add e2e " + repoURL + " >/dev/null && " +
-			"helm search repo e2e/e2echart && " +
-			"cd /tmp && helm pull e2e/e2echart --version 0.1.0 && " +
-			"helm template rel e2echart-0.1.0.tgz | grep -c 'kind: Deployment'")
-		if !strings.Contains(out, "e2e/e2echart") || !strings.Contains(out, "0.1.0") || !strings.HasSuffix(strings.TrimSpace(out), "1") {
-			t.Fatalf("helm via %s:\n%s", repoURL, out)
-		}
-	}
-}

e2e-docker/puppet_local_test.go

@@ -1,88 +0,0 @@
-//go:build dockere2e
-
-package e2edocker
-
-import (
-	"archive/tar"
-	"bytes"
-	"compress/gzip"
-	"net/http"
-	"os"
-	"os/exec"
-	"strings"
-	"testing"
-	"time"
-)
-
-const puppetHelloMetadata = `{"name":"unkin-hello","version":"0.1.0","author":"unkin","summary":"e2e","license":"Apache-2.0","source":"https://example.invalid","dependencies":[{"name":"puppetlabs/stdlib","version_requirement":">= 4.0.0 < 10.0.0"}]}`
-
-func puppetModuleTarball(t *testing.T) []byte {
-	t.Helper()
-	var buf bytes.Buffer
-	zw := gzip.NewWriter(&buf)
-	tw := tar.NewWriter(zw)
-	for name, body := range map[string]string{
-		"unkin-hello-0.1.0/metadata.json":     puppetHelloMetadata,
-		"unkin-hello-0.1.0/manifests/init.pp": "class hello {}\n",
-	} {
-		if err := tw.WriteHeader(&tar.Header{Name: name, Mode: 0o644, Size: int64(len(body)), ModTime: time.Now()}); err != nil {
-			t.Fatal(err)
-		}
-		_, _ = tw.Write([]byte(body))
-	}
-	_ = tw.Close()
-	_ = zw.Close()
-	return buf.Bytes()
-}
-
-// TestLocalPuppetRealClient publishes a module to a puppet local and installs
-// it with the real r10k and puppet module tool. The stdlib dependency is not on
-// a local-only forge, so puppet runs with --ignore-dependencies.
-func TestLocalPuppetRealClient(t *testing.T) {
-	network := os.Getenv("COMPOSE_NETWORK")
-	internal := strings.TrimRight(os.Getenv("ARTIFACTAPI_INTERNAL"), "/")
-	if network == "" || internal == "" {
-		t.Skip("COMPOSE_NETWORK/ARTIFACTAPI_INTERNAL not set; run via scripts/docker-e2e.sh")
-	}
-	if _, err := exec.LookPath("docker"); err != nil {
-		t.Skip("docker not available on the test host")
-	}
-
-	createRepo(t, `{"name":"local-puppet","package_type":"puppet","repo_type":"local"}`)
-	defer deleteRepo(t, "local-puppet")
-
-	upload := api("/api/v2/remotes/local-puppet/files/unkin-hello-0.1.0.tar.gz")
-	defer doRequest(t, http.MethodDelete, api("/api/v2/remotes/local-puppet/files/v3/files/unkin-hello-0.1.0.tar.gz"), nil, "")
-	tarball := puppetModuleTarball(t)
-	if resp, body := doRequest(t, http.MethodPut, upload, tarball, "application/gzip"); resp.StatusCode != http.StatusCreated {
-		t.Fatalf("upload: %d %s", resp.StatusCode, body)
-	}
-	if resp, _ := doRequest(t, http.MethodPut, upload, tarball, "application/gzip"); resp.StatusCode != http.StatusConflict {
-		t.Fatalf("re-upload of an existing version: %d, want 409", resp.StatusCode)
-	}
-	if resp, body := getEventually(t, api("/api/v1/local/local-puppet/v3/releases/unkin-hello-0.1.0"), 15*time.Second); resp.StatusCode != http.StatusOK || !strings.Contains(string(body), `"file_md5"`) {
-		t.Fatalf("release never indexed: %d %s", resp.StatusCode, body)
-	}
-
-	forge := internal + "/api/v1/local/local-puppet"
-	run := func(image, script string) string {
-		t.Helper()
-		out, err := exec.Command("docker", "run", "--rm", "--network", network, "--entrypoint", "sh", image, "-c", "set -eu; "+script).CombinedOutput()
-		if err != nil {
-			t.Fatalf("%s failed: %v\n%s", image, err, out)
-		}
-		return string(out)
-	}
-
-	out := run("ghcr.io/voxpupuli/r10k:latest", "cd /tmp && printf 'forge:\\n  baseurl: "+forge+"\\n' > r10k.yaml && "+
-		"printf \"forge '"+forge+"'\\nmod 'unkin-hello', '0.1.0'\\n\" > Puppetfile && "+
-		"r10k puppetfile install -c r10k.yaml --verbose && cat modules/hello/metadata.json")
-	if !strings.Contains(out, `"unkin-hello"`) {
-		t.Fatalf("r10k did not install unkin-hello:\n%s", out)
-	}
-
-	out = run("ghcr.io/openvoxproject/openvoxagent:latest", "export PATH=/opt/puppetlabs/bin:$PATH; puppet module install unkin-hello --module_repository "+forge+" --ignore-dependencies --target-dir /tmp/mods && puppet module list --color=false --modulepath /tmp/mods")
-	if !strings.Contains(out, "unkin-hello (v0.1.0)") {
-		t.Fatalf("puppet module install did not install unkin-hello:\n%s", out)
-	}
-}

e2e-docker/virtual_test.go

@@ -14,6 +14,8 @@ import (
 	"strings"
 	"testing"
 	"time"
+
+	"git.unkin.net/unkin/artifactapi/internal/testsupport"
 )
 
 // TestVirtualPyPIMerge uploads different packages to two pypi locals and
@@ -136,3 +138,104 @@ func TestVirtualRPMMerge(t *testing.T) {
 		t.Fatalf("real dnf against rpm virtual failed: %v\n%s", err, out)
 	}
 }
+
+// TestVirtualDebMerge merges two local deb repos carrying the same package: the
+// first member wins the duplicate, and a real apt sees both members' packages
+// and installs through the virtual.
+func TestVirtualDebMerge(t *testing.T) {
+	createRepo(t, `{"name":"vdeb-a","package_type":"deb","repo_type":"local"}`)
+	createRepo(t, `{"name":"vdeb-b","package_type":"deb","repo_type":"local"}`)
+	defer deleteRepo(t, "vdeb-a")
+	defer deleteRepo(t, "vdeb-b")
+
+	uploadFile(t, "vdeb-a", "vdeb-one_1.0.0_amd64.deb", testsupport.MinimalDeb("vdeb-one", "1.0.0", "amd64"), "application/vnd.debian.binary-package")
+	uploadFile(t, "vdeb-b", "vdeb-one_1.0.0_amd64.deb", testsupport.MinimalDeb("vdeb-one", "1.0.0", "amd64"), "application/vnd.debian.binary-package")
+	uploadFile(t, "vdeb-b", "vdeb-two_2.0.0_amd64.deb", testsupport.MinimalDeb("vdeb-two", "2.0.0", "amd64"), "application/vnd.debian.binary-package")
+
+	// Local indexes regenerate asynchronously; merge only once vdeb-b lists both.
+	deadline := time.Now().Add(15 * time.Second)
+	for {
+		resp, body := doRequest(t, http.MethodGet, api("/api/v1/local/vdeb-b/Packages"), nil, "")
+		if resp.StatusCode == http.StatusOK && strings.Contains(string(body), "vdeb-two") || time.Now().After(deadline) {
+			break
+		}
+		time.Sleep(500 * time.Millisecond)
+	}
+
+	createVirtual(t, `{"name":"vdeb","package_type":"deb","members":["vdeb-a","vdeb-b"]}`)
+	defer deleteVirtual(t, "vdeb")
+
+	_, body := doRequest(t, http.MethodGet, api("/api/v1/virtual/vdeb/Packages"), nil, "")
+	pk := string(body)
+	if strings.Count(pk, "Package: vdeb-one\n") != 1 || !strings.Contains(pk, "Filename: vdeb-a/pool/vdeb-one_1.0.0_amd64.deb") ||
+		!strings.Contains(pk, "Filename: vdeb-b/pool/vdeb-two_2.0.0_amd64.deb") {
+		t.Fatalf("merged Packages should hold vdeb-one from the first member and vdeb-two:\n%s", pk)
+	}
+
+	network := os.Getenv("COMPOSE_NETWORK")
+	internal := os.Getenv("ARTIFACTAPI_INTERNAL")
+	if network == "" || internal == "" {
+		t.Skip("COMPOSE_NETWORK/ARTIFACTAPI_INTERNAL not set; skipping real apt")
+	}
+	if _, err := exec.LookPath("docker"); err != nil {
+		t.Skip("docker not available on the test host")
+	}
+	script := "set -euo pipefail; " +
+		"rm -f /etc/apt/sources.list.d/*; " +
+		"echo \"deb [trusted=yes] $URL ./\" > /etc/apt/sources.list.d/vdeb.list; " +
+		"apt-get update; " +
+		"apt-cache policy vdeb-one vdeb-two | tee /dev/stderr | grep -c virtual/vdeb | grep -qx 2; " +
+		"apt-get install -y vdeb-one vdeb-two; " +
+		"dpkg -s vdeb-one vdeb-two"
+	out, err := exec.Command("docker", "run", "--rm", "--network", network,
+		"-e", "URL="+strings.TrimRight(internal, "/")+"/api/v1/virtual/vdeb/",
+		"debian:13", "bash", "-c", script).CombinedOutput()
+	if err != nil {
+		t.Fatalf("real apt against deb virtual failed: %v\n%s", err, out)
+	}
+}
+
+// TestVirtualDebSuite merges two proxied deb.debian.org remotes and drives a
+// real apt through the virtual's dists/<suite> layout (by-hash indexes).
+func TestVirtualDebSuite(t *testing.T) {
+	network := os.Getenv("COMPOSE_NETWORK")
+	internal := os.Getenv("ARTIFACTAPI_INTERNAL")
+	if network == "" || internal == "" {
+		t.Skip("COMPOSE_NETWORK/ARTIFACTAPI_INTERNAL not set; skipping real apt")
+	}
+	if _, err := exec.LookPath("docker"); err != nil {
+		t.Skip("docker not available on the test host")
+	}
+	for _, n := range []string{"vdebs-a", "vdebs-b"} {
+		createRepo(t, `{"name":"`+n+`","package_type":"deb","repo_type":"remote","base_url":"http://deb.debian.org/debian"}`)
+		defer deleteRepo(t, n)
+	}
+	createVirtual(t, `{"name":"vdebs","package_type":"deb","members":["vdebs-a","vdebs-b"]}`)
+	defer deleteVirtual(t, "vdebs")
+
+	resp, rel := doRequest(t, http.MethodGet, api("/api/v1/virtual/vdebs/dists/trixie-updates/Release"), nil, "")
+	if resp.StatusCode != http.StatusOK || !strings.Contains(string(rel), "Acquire-By-Hash: yes\n") ||
+		!strings.Contains(string(rel), " main/binary-amd64/Packages.gz\n") {
+		t.Fatalf("merged suite Release: status %d:\n%s", resp.StatusCode, rel)
+	}
+
+	script := "set -euo pipefail; " +
+		"rm -f /etc/apt/sources.list.d/*; " +
+		"echo \"deb [trusted=yes] $URL trixie-updates main\" > /etc/apt/sources.list.d/vdebs.list; " +
+		"apt-get update; " +
+		"idx=/tmp/avail; apt-cache dumpavail > $idx; " +
+		"grep -q '^Filename: vdebs-a/pool/' $idx; if grep -q '^Filename: vdebs-b/' $idx; then echo 'vdebs-b not deduped'; exit 1; fi; " +
+		"pkg=$(awk '/^Package:/{p=$2} /^Size:/{if(!m||$2<m){m=$2;b=p}} END{print b}' $idx); " +
+		"cd /tmp && apt-get download $pkg && ls -l /tmp/*.deb"
+	out, err := exec.Command("docker", "run", "--rm", "--network", network,
+		"-e", "URL="+strings.TrimRight(internal, "/")+"/api/v1/virtual/vdebs/",
+		"debian:13", "bash", "-c", script).CombinedOutput()
+	if err != nil {
+		t.Fatalf("real apt against deb virtual suite failed: %v\n%s", err, out)
+	}
+	t.Logf("%s", out)
+	resp, _ = doRequest(t, http.MethodGet, api("/api/v1/remote/vdebs-a/dists/trixie-updates/main/binary-amd64/Packages.xz"), nil, "")
+	if src := resp.Header.Get("X-Artifact-Source"); resp.StatusCode != http.StatusOK || src != "cache" {
+		t.Fatalf("member index the virtual merged should be cached: status %d source %q", resp.StatusCode, src)
+	}
+}

e2e/head_test.go

@@ -1,182 +0,0 @@
-//go:build e2e
-
-package e2e
-
-import (
-	"encoding/json"
-	"io"
-	"net/http"
-	"net/http/httptest"
-	"strconv"
-	"strings"
-	"testing"
-	"time"
-
-	"git.unkin.net/unkin/artifactapi/internal/testsupport"
-)
-
-// assertHeadMatchesGet checks HEAD returns GET's status, type and length with no body.
-func assertHeadMatchesGet(t *testing.T, url string) {
-	t.Helper()
-	get, err := http.Get(url)
-	if err != nil {
-		t.Fatalf("GET: %v", err)
-	}
-	body, _ := io.ReadAll(get.Body)
-	get.Body.Close()
-	if get.StatusCode != http.StatusOK {
-		t.Fatalf("GET %s: %d %s", url, get.StatusCode, body)
-	}
-
-	head, err := http.Head(url)
-	if err != nil {
-		t.Fatalf("HEAD: %v", err)
-	}
-	hb, _ := io.ReadAll(head.Body)
-	head.Body.Close()
-	if head.StatusCode != http.StatusOK {
-		t.Fatalf("HEAD %s: got %d, want 200", url, head.StatusCode)
-	}
-	if len(hb) != 0 {
-		t.Errorf("HEAD returned a %d-byte body", len(hb))
-	}
-	for _, h := range []string{"Content-Type", "Cache-Control", "Vary"} {
-		if head.Header.Get(h) != get.Header.Get(h) {
-			t.Errorf("HEAD %s %q, GET %q", h, head.Header.Get(h), get.Header.Get(h))
-		}
-	}
-	if head.ContentLength != int64(len(body)) {
-		t.Errorf("HEAD Content-Length %d, GET body %d bytes", head.ContentLength, len(body))
-	}
-}
-
-func TestProxyHeadNuGetRewritten(t *testing.T) {
-	var upstream *httptest.Server
-	upstream = httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
-		w.Header().Set("Content-Type", "application/json")
-		json.NewEncoder(w).Encode(map[string]any{"version": "3.0.0", "resources": []map[string]string{
-			{"@id": upstream.URL + "/v3-flatcontainer/", "@type": "PackageBaseAddress/3.0.0"},
-		}})
-	}))
-	defer upstream.Close()
-
-	createRemote(t, mustFormat(`{"name": "head-nuget", "package_type": "nuget", "base_url": %q}`, upstream.URL+"/v3/index.json"))
-	defer deleteRemote(t, "head-nuget")
-
-	url := apiURL("/api/v1/remote/head-nuget/index.json")
-	assertHeadMatchesGet(t, url)
-
-	req, _ := http.NewRequest(http.MethodHead, url, nil)
-	req.Host = "evil.example:"
-	resp, err := http.DefaultClient.Do(req)
-	if err != nil {
-		t.Fatal(err)
-	}
-	resp.Body.Close()
-	if resp.StatusCode != http.StatusBadRequest {
-		t.Errorf("HEAD with invalid Host: got %d, want 400", resp.StatusCode)
-	}
-}
-
-func TestProxyHeadGitHubRPMRepodata(t *testing.T) {
-	rpm := testsupport.MinimalRPM("demo", "1.2", "3", "x86_64")
-	var gh *httptest.Server
-	mux := http.NewServeMux()
-	mux.HandleFunc("/repos/acme/tools/releases", func(w http.ResponseWriter, r *http.Request) {
-		if p := r.URL.Query().Get("page"); p != "" && p != "1" {
-			w.Write([]byte("[]"))
-			return
-		}
-		json.NewEncoder(w).Encode([]map[string]any{{"tag_name": "v1.2-3", "assets": []map[string]any{{
-			"name":                 "demo-1.2-3.x86_64.rpm",
-			"size":                 len(rpm),
-			"browser_download_url": gh.URL + "/acme/tools/releases/download/v1.2-3/demo-1.2-3.x86_64.rpm",
-		}}}})
-	})
-	mux.HandleFunc("/acme/tools/releases/download/", func(w http.ResponseWriter, r *http.Request) {
-		w.Header().Set("Content-Length", strconv.Itoa(len(rpm)))
-		w.Write(rpm)
-	})
-	gh = httptest.NewServer(mux)
-	defer gh.Close()
-
-	createRemote(t, mustFormat(`{"name": "head-ghrpm", "package_type": "github_rpm", "base_url": %q, "releases_remote": "github"}`, gh.URL+"/repos/acme/tools"))
-	defer deleteRemote(t, "head-ghrpm")
-
-	url := apiURL("/api/v1/remote/head-ghrpm/repodata/repomd.xml")
-	deadline := time.Now().Add(30 * time.Second)
-	for {
-		if _, status := getBody(t, url); status == http.StatusOK || time.Now().After(deadline) {
-			break
-		}
-		time.Sleep(500 * time.Millisecond)
-	}
-	assertHeadMatchesGet(t, url)
-}
-
-func TestProxyHeadNpmUncachedPackument(t *testing.T) {
-	const abbreviated = "application/vnd.npm.install-v1+json"
-	upstream := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
-		w.Header().Set("Content-Type", "application/json")
-		doc := map[string]any{"name": "left-pad", "versions": map[string]any{"1.3.0": map[string]any{}}}
-		if r.Header.Get("Accept") != abbreviated {
-			doc["readme"] = strings.Repeat("full packument ", 200)
-		}
-		json.NewEncoder(w).Encode(doc)
-	}))
-	defer upstream.Close()
-
-	createRemote(t, mustFormat(`{"name": "head-npm", "package_type": "npm", "base_url": %q}`, upstream.URL))
-	defer deleteRemote(t, "head-npm")
-
-	url := apiURL("/api/v1/remote/head-npm/left-pad")
-	do := func(method string) (*http.Response, []byte) {
-		req, _ := http.NewRequest(method, url, nil)
-		req.Header.Set("Accept", abbreviated)
-		resp, err := http.DefaultClient.Do(req)
-		if err != nil {
-			t.Fatalf("%s: %v", method, err)
-		}
-		defer resp.Body.Close()
-		b, _ := io.ReadAll(resp.Body)
-		return resp, b
-	}
-	head, _ := do(http.MethodHead)
-	get, body := do(http.MethodGet)
-	if head.StatusCode != http.StatusOK || get.StatusCode != http.StatusOK {
-		t.Fatalf("HEAD %d, GET %d", head.StatusCode, get.StatusCode)
-	}
-	if head.ContentLength != int64(len(body)) {
-		t.Errorf("uncached HEAD Content-Length %d, GET body %d bytes", head.ContentLength, len(body))
-	}
-}
-
-func TestProxyHeadNonRewritingUsesUpstreamHead(t *testing.T) {
-	methods := make(chan string, 4)
-	upstream := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
-		methods <- r.Method
-		w.Header().Set("Content-Type", "text/xml")
-		w.Write([]byte("<repomd/>"))
-	}))
-	defer upstream.Close()
-
-	createRemote(t, mustFormat(`{"name": "head-rpm", "package_type": "rpm", "base_url": %q}`, upstream.URL))
-	defer deleteRemote(t, "head-rpm")
-
-	resp, err := http.Head(apiURL("/api/v1/remote/head-rpm/repodata/repomd.xml"))
-	if err != nil {
-		t.Fatalf("HEAD: %v", err)
-	}
-	resp.Body.Close()
-	if resp.StatusCode != http.StatusOK || resp.Header.Get("X-Artifact-Source") != "remote" {
-		t.Fatalf("HEAD %d source %q", resp.StatusCode, resp.Header.Get("X-Artifact-Source"))
-	}
-	close(methods)
-	var seen []string
-	for m := range methods {
-		seen = append(seen, m)
-	}
-	if len(seen) != 1 || seen[0] != http.MethodHead {
-		t.Errorf("upstream saw %v, want a single HEAD", seen)
-	}
-}

e2e/scheme_test.go

@@ -1,59 +0,0 @@
-//go:build e2e
-
-package e2e
-
-import (
-	"encoding/json"
-	"net/http"
-	"strings"
-	"testing"
-)
-
-func getForwardedHTTPS(t *testing.T, url string) *http.Response {
-	t.Helper()
-	req, _ := http.NewRequest(http.MethodGet, url, nil)
-	req.Header.Set("X-Forwarded-Proto", "https")
-	client := &http.Client{CheckRedirect: func(*http.Request, []*http.Request) error { return http.ErrUseLastResponse }}
-	resp, err := client.Do(req)
-	if err != nil {
-		t.Fatalf("GET %s: %v", url, err)
-	}
-	return resp
-}
-
-func TestForwardedProtoCargoConfig(t *testing.T) {
-	createRemote(t, `{"name": "scheme-cargo", "package_type": "cargo", "base_url": "https://index.crates.io"}`)
-	defer deleteRemote(t, "scheme-cargo")
-
-	resp := getForwardedHTTPS(t, apiURL("/api/v1/remote/scheme-cargo/config.json"))
-	defer resp.Body.Close()
-	var cfg map[string]string
-	if err := json.NewDecoder(resp.Body).Decode(&cfg); err != nil {
-		t.Fatal(err)
-	}
-	if want := "https://" + strings.TrimPrefix(baseURL, "http://") + "/api/v1/remote/scheme-cargo/"; !strings.HasPrefix(cfg["dl"], want) {
-		t.Errorf("dl = %q, want prefix %q", cfg["dl"], want)
-	}
-}
-
-func TestForwardedProtoVirtualRedirect(t *testing.T) {
-	createRemote(t, `{"name": "scheme-rpm", "package_type": "rpm", "base_url": "https://rpm.example.com"}`)
-	defer deleteRemote(t, "scheme-rpm")
-	resp, err := http.Post(apiURL("/api/v2/virtuals"), "application/json",
-		strings.NewReader(`{"name": "scheme-virt", "package_type": "rpm", "members": ["scheme-rpm"]}`))
-	if err != nil {
-		t.Fatal(err)
-	}
-	resp.Body.Close()
-	if resp.StatusCode != http.StatusCreated {
-		t.Fatalf("create virtual: status %d", resp.StatusCode)
-	}
-	defer deleteRequest(t, apiURL("/api/v2/virtuals/scheme-virt"))
-
-	resp = getForwardedHTTPS(t, apiURL("/api/v1/virtual/scheme-virt/scheme-rpm/Packages/a.rpm"))
-	resp.Body.Close()
-	loc := resp.Header.Get("Location")
-	if want := "https://" + strings.TrimPrefix(baseURL, "http://") + "/api/v1/remote/scheme-rpm/Packages/a.rpm"; resp.StatusCode != http.StatusFound || loc != want {
-		t.Errorf("redirect = %d %q, want 302 %q", resp.StatusCode, loc, want)
-	}
-}

internal/api/terraform/registry.go

@@ -13,7 +13,6 @@ import (
 
 	"github.com/go-chi/chi/v5"
 
-	v1 "git.unkin.net/unkin/artifactapi/internal/api/v1"
 	"git.unkin.net/unkin/artifactapi/internal/database"
 	tfprov "git.unkin.net/unkin/artifactapi/internal/provider/terraform"
 	"git.unkin.net/unkin/artifactapi/internal/tfsign"
@@ -291,5 +290,12 @@ func writeJSON(w http.ResponseWriter, v any) {
 }
 
 func baseURL(r *http.Request) string {
-	return v1.Scheme(r) + "://" + r.Host
+	scheme := "http"
+	if r.TLS != nil {
+		scheme = "https"
+	}
+	if fwd := r.Header.Get("X-Forwarded-Proto"); fwd != "" {
+		scheme = fwd
+	}
+	return scheme + "://" + r.Host
 }

internal/api/v1/proxy.go

@@ -6,10 +6,7 @@ import (
 	"fmt"
 	"io"
 	"log/slog"
-	"net"
 	"net/http"
-	"strconv"
-	"strings"
 
 	"github.com/go-chi/chi/v5"
 
@@ -19,7 +16,6 @@ import (
 	"git.unkin.net/unkin/artifactapi/internal/proxy"
 	"git.unkin.net/unkin/artifactapi/internal/storage"
 	"git.unkin.net/unkin/artifactapi/internal/virtual"
-	"git.unkin.net/unkin/artifactapi/pkg/models"
 )
 
 type ProxyHandler struct {
@@ -45,7 +41,6 @@ func NewProxyHandler(engine *proxy.Engine, virtualEngine *virtual.Engine, db *da
 func (h *ProxyHandler) Routes() chi.Router {
 	r := chi.NewRouter()
 	r.Get("/remote/{remoteName}/*", h.handleProxy)
-	r.Head("/remote/{remoteName}/*", h.handleProxyHead)
 	r.Get("/local/{localName}/*", h.handleLocal)
 	r.Get("/virtual/{virtualName}/*", h.handleVirtual)
 	return r
@@ -73,43 +68,31 @@ func (h *ProxyHandler) handleDockerPing(w http.ResponseWriter, r *http.Request)
 	w.WriteHeader(http.StatusOK)
 }
 
-// remoteFor resolves the remote and provider named in the request, writing the
-// error response itself when either is missing.
-func (h *ProxyHandler) remoteFor(w http.ResponseWriter, r *http.Request) (*models.Remote, provider.Provider, bool) {
+func (h *ProxyHandler) handleProxy(w http.ResponseWriter, r *http.Request) {
 	remoteName := chi.URLParam(r, "remoteName")
+	path := chi.URLParam(r, "*")
+
 	remote, err := h.db.GetRemote(r.Context(), remoteName)
 	if err != nil {
 		http.Error(w, fmt.Sprintf("remote %q not found", remoteName), http.StatusNotFound)
-		return nil, nil, false
+		return
 	}
+
 	prov, err := provider.Get(remote.PackageType)
 	if err != nil {
 		http.Error(w, fmt.Sprintf("no provider for %q", remote.PackageType), http.StatusInternalServerError)
-		return nil, nil, false
-	}
-	return remote, prov, true
-}
-
-// serveRemote lets metadata-only remotes (e.g. github_rpm) synthesize their own
-// responses and redirect package downloads instead of proxying bytes.
-func (h *ProxyHandler) serveRemote(w http.ResponseWriter, r *http.Request, remote *models.Remote, prov provider.Provider, path string) bool {
-	rs, ok := prov.(provider.RemoteServer)
-	return ok && rs.ServeRemote(w, r, *remote, path, fmt.Sprintf("%s://%s", Scheme(r), r.Host), h.db)
-}
-
-func (h *ProxyHandler) handleProxy(w http.ResponseWriter, r *http.Request) {
-	remote, prov, ok := h.remoteFor(w, r)
-	if !ok {
 		return
 	}
-	path := chi.URLParam(r, "*")
-	if h.serveRemote(w, r, remote, prov, path) {
-		return
-	}
-	h.serveFetch(w, r, remote, prov, path)
-}
 
-func (h *ProxyHandler) serveFetch(w http.ResponseWriter, r *http.Request, remote *models.Remote, prov provider.Provider, path string) {
+	// Metadata-only remotes (e.g. github_rpm) synthesize their own responses and
+	// redirect package downloads to a backend remote instead of proxying bytes.
+	if rs, ok := prov.(provider.RemoteServer); ok {
+		proxyBaseURL := fmt.Sprintf("%s://%s", scheme(r), r.Host)
+		if rs.ServeRemote(w, r, *remote, path, proxyBaseURL, h.db) {
+			return
+		}
+	}
+
 	result, err := h.engine.Fetch(r.Context(), *remote, path, prov, r.Header)
 	if err != nil {
 		var proxyErr *proxy.ProxyError
@@ -117,7 +100,7 @@ func (h *ProxyHandler) serveFetch(w http.ResponseWriter, r *http.Request, remote
 			http.Error(w, proxyErr.Message, proxyErr.Status)
 			return
 		}
-		slog.Error("proxy fetch failed", "remote", remote.Name, "path", path, "error", err)
+		slog.Error("proxy fetch failed", "remote", remoteName, "path", path, "error", err)
 		http.Error(w, "bad gateway", http.StatusBadGateway)
 		return
 	}
@@ -125,43 +108,37 @@ func (h *ProxyHandler) serveFetch(w http.ResponseWriter, r *http.Request, remote
 
 	var body io.Reader = result.Reader
 	if sr, ok := prov.(provider.ServeRewriter); ok && prov.Classify(path) == provider.Mutable {
-		raw, ok := rewriteServed(w, r, sr, *remote, result.Reader)
-		if !ok {
+		raw, err := io.ReadAll(result.Reader)
+		if err != nil {
+			http.Error(w, "bad gateway", http.StatusBadGateway)
 			return
 		}
+		raw = sr.RewriteServed(raw, *remote, fmt.Sprintf("%s://%s", scheme(r), r.Host))
 		body, result.Size = bytes.NewReader(raw), int64(len(raw))
 	}
 
 	w.Header().Set("Content-Type", result.ContentType)
 	w.Header().Set("X-Artifact-Source", result.Source)
 	if result.Size > 0 {
-		w.Header().Set("Content-Length", fmt.Sprintf("%d", result.Size))
 		w.Header().Set("X-Artifact-Size", fmt.Sprintf("%d", result.Size))
 	}
 	w.WriteHeader(http.StatusOK)
 	io.Copy(w, body)
 }
 
-func rewritesMutable(prov provider.Provider, path string) bool {
-	_, sr := prov.(provider.ServeRewriter)
-	_, rr := prov.(provider.ResponseRewriter)
-	return (sr || rr) && prov.Classify(path) == provider.Mutable
-}
-
-// handleProxyHead answers HEAD like GET without a body. Responses a provider
-// synthesizes or rewrites per request go through the GET path so their headers
-// match; everything else is answered from store metadata or an upstream HEAD.
 func (h *ProxyHandler) handleProxyHead(w http.ResponseWriter, r *http.Request) {
-	remote, prov, ok := h.remoteFor(w, r)
-	if !ok {
-		return
-	}
+	remoteName := chi.URLParam(r, "remoteName")
 	path := chi.URLParam(r, "*")
-	if h.serveRemote(w, r, remote, prov, path) {
+
+	remote, err := h.db.GetRemote(r.Context(), remoteName)
+	if err != nil {
+		http.Error(w, fmt.Sprintf("remote %q not found", remoteName), http.StatusNotFound)
 		return
 	}
-	if rewritesMutable(prov, path) {
-		h.serveFetch(w, r, remote, prov, path)
+
+	prov, err := provider.Get(remote.PackageType)
+	if err != nil {
+		http.Error(w, fmt.Sprintf("no provider for %q", remote.PackageType), http.StatusInternalServerError)
 		return
 	}
 
@@ -172,7 +149,7 @@ func (h *ProxyHandler) handleProxyHead(w http.ResponseWriter, r *http.Request) {
 			http.Error(w, proxyErr.Message, proxyErr.Status)
 			return
 		}
-		slog.Error("proxy head failed", "remote", remote.Name, "path", path, "error", err)
+		slog.Error("proxy head failed", "remote", remoteName, "path", path, "error", err)
 		http.Error(w, "bad gateway", http.StatusBadGateway)
 		return
 	}
@@ -195,7 +172,7 @@ func (h *ProxyHandler) handleVirtual(w http.ResponseWriter, r *http.Request) {
 		return
 	}
 
-	proxyBaseURL := fmt.Sprintf("%s://%s", Scheme(r), r.Host)
+	proxyBaseURL := fmt.Sprintf("%s://%s", scheme(r), r.Host)
 
 	loc, ok, err := h.virtualEngine.MemberRedirect(r.Context(), *virt, path, r.URL.RawQuery, proxyBaseURL)
 	if err != nil {
@@ -272,68 +249,12 @@ func (h *ProxyHandler) serveLocalFile(w http.ResponseWriter, r *http.Request, re
 	io.Copy(w, reader)
 }
 
-// Scheme returns the client-facing scheme: TLS, else the first
-// X-Forwarded-Proto value when it is http or https, else http.
-func Scheme(r *http.Request) string {
+func scheme(r *http.Request) string {
 	if r.TLS != nil {
 		return "https"
 	}
-	fwd, _, _ := strings.Cut(r.Header.Get("X-Forwarded-Proto"), ",")
-	if fwd = strings.ToLower(strings.TrimSpace(fwd)); fwd == "https" {
+	if fwd := r.Header.Get("X-Forwarded-Proto"); fwd != "" {
 		return fwd
 	}
 	return "http"
 }
-
-// rewriteServed rewrites a cached body for the requesting host and marks the
-// response uncacheable by shared caches, since it varies per Host.
-func rewriteServed(w http.ResponseWriter, r *http.Request, sr provider.ServeRewriter, remote models.Remote, src io.Reader) ([]byte, bool) {
-	if !validHost(r.Host) {
-		http.Error(w, "invalid host header", http.StatusBadRequest)
-		return nil, false
-	}
-	raw, err := io.ReadAll(src)
-	if err != nil {
-		http.Error(w, "bad gateway", http.StatusBadGateway)
-		return nil, false
-	}
-	raw = sr.RewriteServed(raw, remote, fmt.Sprintf("%s://%s", Scheme(r), r.Host))
-	w.Header().Set("Cache-Control", "no-store")
-	w.Header().Set("Vary", "Host, X-Forwarded-Proto")
-	w.Header().Set("Content-Length", strconv.Itoa(len(raw)))
-	return raw, true
-}
-
-// validHost accepts host[:port] where host is a DNS name or IP literal.
-func validHost(hostport string) bool {
-	host, port := hostport, ""
-	if h, p, err := net.SplitHostPort(hostport); err == nil {
-		if p == "" {
-			return false
-		}
-		host, port = h, p
-	} else if strings.HasPrefix(hostport, "[") {
-		return strings.HasSuffix(hostport, "]") && net.ParseIP(hostport[1:len(hostport)-1]) != nil
-	}
-	if port != "" {
-		if n, err := strconv.Atoi(port); err != nil || n < 1 || n > 65535 {
-			return false
-		}
-	}
-	if net.ParseIP(host) != nil {
-		return true
-	}
-	if strings.HasPrefix(hostport, "[") {
-		return false
-	}
-	if host == "" || len(host) > 253 {
-		return false
-	}
-	for _, label := range strings.Split(strings.TrimSuffix(host, "."), ".") {
-		if label == "" || len(label) > 63 || label[0] == '-' || label[len(label)-1] == '-' ||
-			strings.Trim(strings.ToLower(label), "abcdefghijklmnopqrstuvwxyz0123456789-_") != "" {
-			return false
-		}
-	}
-	return true
-}

internal/api/v1/rewrite_test.go

@@ -1,74 +0,0 @@
-package v1
-
-import (
-	"net/http"
-	"net/http/httptest"
-	"strings"
-	"testing"
-
-	"git.unkin.net/unkin/artifactapi/internal/provider/nuget"
-	"git.unkin.net/unkin/artifactapi/pkg/models"
-)
-
-func TestValidHost(t *testing.T) {
-	for _, h := range []string{"aa.example", "aa.example:8443", "artifactapi.k8s.syd1.au.unkin.net", "10.0.0.1:80", "[::1]:8080", "[::1]", "::1", "localhost", "my_host.local"} {
-		if !validHost(h) {
-			t.Errorf("validHost(%q) = false, want true", h)
-		}
-	}
-	for _, h := range []string{"", "evil\".example", "a b", "aa.example:0", "aa.example:99999", "aa.example:x", "aa.example:", ":8080", "-bad.example", "a..b", "[::1", "[nope]:80", "a/b", "a<script>", strings.Repeat("a", 64) + ".example"} {
-		if validHost(h) {
-			t.Errorf("validHost(%q) = true, want false", h)
-		}
-	}
-}
-
-var nugetOrg = models.Remote{Name: "nuget-org", BaseURL: "https://api.nuget.org/v3/index.json"}
-
-const serviceIndex = `{"resources":[{"@id":"https://api.nuget.org/v3-flatcontainer/"}]}`
-
-func rewrite(t *testing.T, host, proto string) (*httptest.ResponseRecorder, string, bool) {
-	t.Helper()
-	r := httptest.NewRequest(http.MethodGet, "/api/v1/remote/nuget-org/index.json", nil)
-	r.Host = host
-	if proto != "" {
-		r.Header.Set("X-Forwarded-Proto", proto)
-	}
-	w := httptest.NewRecorder()
-	raw, ok := rewriteServed(w, r, &nuget.Provider{}, nugetOrg, strings.NewReader(serviceIndex))
-	return w, string(raw), ok
-}
-
-func TestRewriteServedHeaders(t *testing.T) {
-	w, body, ok := rewrite(t, "aa.example:8443", "https")
-	if !ok {
-		t.Fatal("valid request rejected")
-	}
-	if want := `{"resources":[{"@id":"https://aa.example:8443/api/v1/remote/nuget-org/v3-flatcontainer/"}]}`; body != want {
-		t.Errorf("body = %s, want %s", body, want)
-	}
-	if got := w.Header().Get("Cache-Control"); got != "no-store" {
-		t.Errorf("Cache-Control = %q, want no-store", got)
-	}
-	if got := w.Header().Get("Vary"); got != "Host, X-Forwarded-Proto" {
-		t.Errorf("Vary = %q", got)
-	}
-	if got := w.Header().Get("Content-Length"); got != "91" || len(body) != 91 {
-		t.Errorf("Content-Length = %q, body len %d", got, len(body))
-	}
-}
-
-func TestRewriteServedIgnoresBogusProto(t *testing.T) {
-	_, plain, _ := rewrite(t, "aa.example", "")
-	_, bogus, _ := rewrite(t, "aa.example", "javascript")
-	if bogus != plain || !strings.Contains(bogus, `"http://aa.example/`) {
-		t.Errorf("bogus X-Forwarded-Proto changed the body: %s", bogus)
-	}
-}
-
-func TestRewriteServedRejectsInvalidHost(t *testing.T) {
-	w, _, ok := rewrite(t, `evil"},{"x":"`, "")
-	if ok || w.Code != http.StatusBadRequest {
-		t.Errorf("invalid host: ok=%v code=%d, want rejected with 400", ok, w.Code)
-	}
-}

internal/api/v1/routes_test.go

@@ -1,41 +0,0 @@
-package v1
-
-import (
-	"net/http"
-	"testing"
-
-	"github.com/go-chi/chi/v5"
-
-	"git.unkin.net/unkin/artifactapi/internal/provider"
-	"git.unkin.net/unkin/artifactapi/internal/provider/npm"
-	"git.unkin.net/unkin/artifactapi/internal/provider/nuget"
-	"git.unkin.net/unkin/artifactapi/internal/provider/rpm"
-)
-
-func TestRoutesRemoteHead(t *testing.T) {
-	r := (&ProxyHandler{}).Routes()
-	for _, m := range []string{http.MethodGet, http.MethodHead} {
-		if !r.Match(chi.NewRouteContext(), m, "/remote/myremote/some/path") {
-			t.Errorf("%s /remote/myremote/some/path not routed", m)
-		}
-	}
-}
-
-func TestRewritesMutable(t *testing.T) {
-	tests := []struct {
-		name string
-		prov provider.Provider
-		path string
-		want bool
-	}{
-		{"npm packument", &npm.Provider{}, "left-pad", true},
-		{"npm tarball", &npm.Provider{}, "left-pad/-/left-pad-1.3.0.tgz", false},
-		{"nuget index", &nuget.Provider{}, "index.json", true},
-		{"rpm repodata", &rpm.Provider{}, "repodata/repomd.xml", false},
-	}
-	for _, tc := range tests {
-		if got := rewritesMutable(tc.prov, tc.path); got != tc.want {
-			t.Errorf("%s: rewritesMutable = %v, want %v", tc.name, got, tc.want)
-		}
-	}
-}

internal/api/v1/scheme_test.go

@@ -7,28 +7,14 @@ import (
 )
 
 func TestScheme(t *testing.T) {
-	if got := Scheme(&http.Request{TLS: &tls.ConnectionState{}}); got != "https" {
+	if got := scheme(&http.Request{TLS: &tls.ConnectionState{}}); got != "https" {
 		t.Errorf("TLS request scheme = %q, want https", got)
 	}
 	r := &http.Request{Header: http.Header{"X-Forwarded-Proto": {"https"}}}
-	if got := Scheme(r); got != "https" {
+	if got := scheme(r); got != "https" {
 		t.Errorf("X-Forwarded-Proto scheme = %q, want https", got)
 	}
-	for fwd, want := range map[string]string{
-		"https, http": "https",
-		"http, https": "http",
-		"HTTPS":       "https",
-		" https ":     "https",
-		"javascript":  "http",
-		"ftp":         "http",
-		"https;evil":  "http",
-	} {
-		r := &http.Request{Header: http.Header{"X-Forwarded-Proto": {fwd}}}
-		if got := Scheme(r); got != want {
-			t.Errorf("X-Forwarded-Proto %q scheme = %q, want %s", fwd, got, want)
-		}
-	}
-	if got := Scheme(&http.Request{Header: http.Header{}}); got != "http" {
+	if got := scheme(&http.Request{Header: http.Header{}}); got != "http" {
 		t.Errorf("default scheme = %q, want http", got)
 	}
 }

internal/database/helm_metadata.go

@@ -1,44 +0,0 @@
-package database
-
-import (
-	"context"
-
-	"git.unkin.net/unkin/artifactapi/internal/provider"
-)
-
-func (db *DB) InsertHelmMetadata(ctx context.Context, meta *provider.HelmMetadata) error {
-	_, err := db.Pool.Exec(ctx, `
-		INSERT INTO helm_metadata (repo_name, file_path, content_hash, name, version, chart_yaml)
-		VALUES ($1,$2,$3,$4,$5,$6)
-		ON CONFLICT (repo_name, file_path) DO NOTHING
-	`, meta.RepoName, meta.FilePath, meta.ContentHash, meta.Name, meta.Version, meta.ChartYAML)
-	return err
-}
-
-func (db *DB) DeleteHelmMetadata(ctx context.Context, repoName, filePath string) error {
-	_, err := db.Pool.Exec(ctx, `DELETE FROM helm_metadata WHERE repo_name = $1 AND file_path = $2`, repoName, filePath)
-	return err
-}
-
-func (db *DB) ListHelmMetadataEntries(ctx context.Context, repoName string) ([]provider.HelmMetadata, error) {
-	rows, err := db.Pool.Query(ctx, `
-		SELECT repo_name, file_path, content_hash, name, version, chart_yaml, created_at
-		FROM helm_metadata
-		WHERE repo_name = $1
-		ORDER BY name, version, file_path
-	`, repoName)
-	if err != nil {
-		return nil, err
-	}
-	defer rows.Close()
-
-	var result []provider.HelmMetadata
-	for rows.Next() {
-		var m provider.HelmMetadata
-		if err := rows.Scan(&m.RepoName, &m.FilePath, &m.ContentHash, &m.Name, &m.Version, &m.ChartYAML, &m.CreatedAt); err != nil {
-			return nil, err
-		}
-		result = append(result, m)
-	}
-	return result, rows.Err()
-}

internal/database/puppet_metadata.go

@@ -1,46 +0,0 @@
-package database
-
-import (
-	"context"
-
-	"git.unkin.net/unkin/artifactapi/internal/provider"
-)
-
-func (db *DB) InsertPuppetMetadata(ctx context.Context, meta *provider.PuppetMetadata) error {
-	_, err := db.Pool.Exec(ctx, `
-		INSERT INTO puppet_metadata (repo_name, file_path, content_hash, slug, version, metadata_json, file_size, file_md5)
-		VALUES ($1,$2,$3,$4,$5,$6,$7,$8)
-		ON CONFLICT (repo_name, file_path) DO NOTHING
-	`, meta.RepoName, meta.FilePath, meta.ContentHash, meta.Slug, meta.Version, meta.MetadataJSON, meta.Size, meta.MD5)
-	return err
-}
-
-func (db *DB) DeletePuppetMetadata(ctx context.Context, repoName, filePath string) error {
-	_, err := db.Pool.Exec(ctx, `DELETE FROM puppet_metadata WHERE repo_name = $1 AND file_path = $2`, repoName, filePath)
-	return err
-}
-
-// ListPuppetMetadataEntries returns a repo's releases, optionally narrowed to
-// one module slug (empty slug lists every module).
-func (db *DB) ListPuppetMetadataEntries(ctx context.Context, repoName, slug string) ([]provider.PuppetMetadata, error) {
-	rows, err := db.Pool.Query(ctx, `
-		SELECT repo_name, file_path, content_hash, slug, version, metadata_json, file_size, file_md5, created_at
-		FROM puppet_metadata
-		WHERE repo_name = $1 AND ($2 = '' OR slug = $2)
-		ORDER BY slug, file_path
-	`, repoName, slug)
-	if err != nil {
-		return nil, err
-	}
-	defer rows.Close()
-
-	var result []provider.PuppetMetadata
-	for rows.Next() {
-		var m provider.PuppetMetadata
-		if err := rows.Scan(&m.RepoName, &m.FilePath, &m.ContentHash, &m.Slug, &m.Version, &m.MetadataJSON, &m.Size, &m.MD5, &m.CreatedAt); err != nil {
-			return nil, err
-		}
-		result = append(result, m)
-	}
-	return result, rows.Err()
-}

internal/provider/all/alpine.go

@@ -1,3 +0,0 @@
-package all
-
-import _ "git.unkin.net/unkin/artifactapi/internal/provider/alpine"

internal/provider/all/cargo.go

@@ -1,3 +0,0 @@
-package all
-
-import _ "git.unkin.net/unkin/artifactapi/internal/provider/cargo"

internal/provider/all/deb.go

@@ -1,3 +0,0 @@
-package all
-
-import _ "git.unkin.net/unkin/artifactapi/internal/provider/deb"

internal/provider/all/docker.go

@@ -1,3 +0,0 @@
-package all
-
-import _ "git.unkin.net/unkin/artifactapi/internal/provider/docker"

internal/provider/all/generic.go

@@ -1,3 +0,0 @@
-package all
-
-import _ "git.unkin.net/unkin/artifactapi/internal/provider/generic"

internal/provider/all/goproxy.go

@@ -1,3 +0,0 @@
-package all
-
-import _ "git.unkin.net/unkin/artifactapi/internal/provider/goproxy"

internal/provider/all/helm.go

@@ -1,3 +0,0 @@
-package all
-
-import _ "git.unkin.net/unkin/artifactapi/internal/provider/helm"

internal/provider/all/npm.go

@@ -1,3 +0,0 @@
-package all
-
-import _ "git.unkin.net/unkin/artifactapi/internal/provider/npm"

internal/provider/all/nuget.go

@@ -1,3 +0,0 @@
-package all
-
-import _ "git.unkin.net/unkin/artifactapi/internal/provider/nuget"

internal/provider/all/puppet.go

@@ -1,3 +0,0 @@
-package all
-
-import _ "git.unkin.net/unkin/artifactapi/internal/provider/puppet"

internal/provider/all/pypi.go

@@ -1,3 +0,0 @@
-package all
-
-import _ "git.unkin.net/unkin/artifactapi/internal/provider/pypi"

internal/provider/all/rpm.go

@@ -1,3 +0,0 @@
-package all
-
-import _ "git.unkin.net/unkin/artifactapi/internal/provider/rpm"

internal/provider/all/terraform.go

@@ -1,3 +0,0 @@
-package all
-
-import _ "git.unkin.net/unkin/artifactapi/internal/provider/terraform"

internal/provider/cap_file_store.go

@@ -1,15 +0,0 @@
-package provider
-
-import (
-	"context"
-	"io"
-)
-
-type FileStore interface {
-	ListFilesByPrefix(ctx context.Context, repoName, prefix string) ([]FileEntry, error)
-	ListPackages(ctx context.Context, repoName string) ([]string, error)
-}
-
-type BlobReader interface {
-	Download(ctx context.Context, key string) (io.ReadCloser, int64, error)
-}

internal/provider/cap_index_merger.go

@@ -1,10 +0,0 @@
-package provider
-
-type IndexMerger interface {
-	MergeIndexes(members []MemberIndex, proxyBaseURL string) ([]byte, error)
-}
-
-type MemberIndex struct {
-	RemoteName string
-	Body       []byte
-}

internal/provider/cap_local_indexer.go

@@ -1,11 +0,0 @@
-package provider
-
-import (
-	"context"
-	"net/http"
-)
-
-type LocalIndexer interface {
-	ServeLocalIndex(w http.ResponseWriter, r *http.Request, files FileStore, repoName, path string) bool
-	GenerateLocalIndex(ctx context.Context, files FileStore, repoName, path string) ([]byte, error)
-}

internal/provider/cap_local_uploader.go

@@ -1,6 +0,0 @@
-package provider
-
-type LocalUploader interface {
-	ValidateUpload(filePath string) (storagePath, contentType string, err error)
-	UploadResponse(storagePath, contentHash string, sizeBytes int64) map[string]any
-}

internal/provider/cap_post_delete_hook.go

@@ -1,11 +0,0 @@
-package provider
-
-import (
-	"context"
-)
-
-// PostDeleteHook lets a provider clean up derived state (e.g. RPM metadata that
-// feeds generated repodata) after a local file is removed.
-type PostDeleteHook interface {
-	AfterDelete(ctx context.Context, repoName, storagePath string, db MetadataDeleter) error
-}

internal/provider/cap_post_upload_hook.go

@@ -1,9 +0,0 @@
-package provider
-
-import (
-	"context"
-)
-
-type PostUploadHook interface {
-	AfterUpload(ctx context.Context, repoName, storagePath, contentHash string, blobs BlobReader, db MetadataStore)
-}

internal/provider/cap_remote_server.go

@@ -1,25 +0,0 @@
-package provider
-
-import (
-	"net/http"
-
-	"git.unkin.net/unkin/artifactapi/pkg/models"
-)
-
-// RemoteServer lets a remote provider fully answer a request itself instead of
-// going through the byte-proxy engine. It is the remote-side analog of
-// LocalIndexer: a metadata-only remote (e.g. github_rpm) uses it to synthesize
-// repodata from derived per-asset metadata and to redirect package downloads to
-// a backend remote, without ever precaching the packages. Returning false lets
-// the normal proxy path take over.
-type RemoteServer interface {
-	ServeRemote(w http.ResponseWriter, r *http.Request, remote models.Remote, path, proxyBaseURL string, store RemoteMetadataStore) bool
-}
-
-// RemoteMetadataStore is the persistence surface a RemoteServer needs to cache
-// and read the metadata it derives per upstream asset. *database.DB satisfies it.
-type RemoteMetadataStore interface {
-	RPMMetadataReader
-	MetadataStore
-	MetadataDeleter
-}

internal/provider/cap_response_rewriter.go

@@ -1,7 +0,0 @@
-package provider
-
-// ResponseRewriter marks providers whose RewriteResponse changes mutable
-// bodies, so the served length is only known after a fetch.
-type ResponseRewriter interface {
-	RewritesResponse()
-}

internal/provider/cap_serve_rewriter.go

@@ -1,12 +0,0 @@
-package provider
-
-import (
-	"git.unkin.net/unkin/artifactapi/pkg/models"
-)
-
-// ServeRewriter rewrites a cached mutable remote response per request, for
-// indexes whose URLs must name the requesting host and so cannot be rewritten
-// before caching.
-type ServeRewriter interface {
-	RewriteServed(body []byte, remote models.Remote, proxyBaseURL string) []byte
-}

internal/provider/helm/helm.go

@@ -1,24 +1,12 @@
 package helm
 
 import (
-	"archive/tar"
-	"compress/gzip"
 	"context"
-	"errors"
-	"fmt"
-	"io"
-	"log/slog"
 	"net/http"
-	"net/url"
-	"path"
 	"strings"
-	"time"
-
-	"gopkg.in/yaml.v3"
 
 	"git.unkin.net/unkin/artifactapi/internal/auth"
 	"git.unkin.net/unkin/artifactapi/internal/provider"
-	"git.unkin.net/unkin/artifactapi/internal/storage"
 	"git.unkin.net/unkin/artifactapi/pkg/models"
 )
 
@@ -51,8 +39,6 @@ func (p *Provider) UpstreamURL(remote models.Remote, path string) string {
 	return strings.TrimRight(remote.BaseURL, "/") + "/" + strings.TrimLeft(path, "/")
 }
 
-func (p *Provider) RewritesResponse() {}
-
 func (p *Provider) RewriteResponse(body []byte, remote models.Remote, proxyBaseURL string) ([]byte, error) {
 	if proxyBaseURL == "" {
 		return nil, nil
@@ -70,203 +56,3 @@ func (p *Provider) RewriteResponse(body []byte, remote models.Remote, proxyBaseU
 func (p *Provider) AuthHeaders(_ context.Context, remote models.Remote) (http.Header, error) {
 	return auth.BasicHeaders(remote), nil
 }
-
-// ValidateUpload stores charts flat by filename so index.yaml can reference
-// them with relative urls, as `helm repo index` does.
-func (p *Provider) ValidateUpload(filePath string) (storagePath, contentType string, err error) {
-	filename := path.Base(path.Clean("/" + filePath))
-	if !strings.HasSuffix(filename, ".tgz") || filename == ".tgz" {
-		return "", "", fmt.Errorf("file must be a .tgz chart package")
-	}
-	return filename, "application/gzip", nil
-}
-
-func (p *Provider) UploadResponse(storagePath, contentHash string, sizeBytes int64) map[string]any {
-	return map[string]any{
-		"filename":     storagePath,
-		"content_hash": contentHash,
-		"size_bytes":   sizeBytes,
-	}
-}
-
-func (p *Provider) AfterUpload(ctx context.Context, repoName, storagePath, contentHash string, blobs provider.BlobReader, db provider.MetadataStore) {
-	reader, _, err := blobs.Download(ctx, storage.BlobKey(strings.TrimPrefix(contentHash, "sha256:")))
-	if err != nil {
-		slog.Error("helm metadata: download failed", "repo", repoName, "path", storagePath, "error", err)
-		return
-	}
-	defer func() { _ = reader.Close() }()
-
-	meta, err := parseChart(reader)
-	if err != nil {
-		slog.Error("helm metadata: parse failed", "repo", repoName, "path", storagePath, "error", err)
-		return
-	}
-	if want := meta.Name + "-" + meta.Version + ".tgz"; storagePath != want {
-		slog.Error("helm metadata: filename does not match chart", "repo", repoName, "path", storagePath, "expected", want)
-		return
-	}
-	meta.RepoName = repoName
-	meta.FilePath = storagePath
-	meta.ContentHash = contentHash
-
-	store, ok := db.(provider.HelmMetadataStore)
-	if !ok {
-		slog.Error("helm metadata: store does not support helm metadata", "repo", repoName)
-		return
-	}
-	if err := store.InsertHelmMetadata(ctx, meta); err != nil {
-		slog.Error("helm metadata: insert failed", "repo", repoName, "path", storagePath, "error", err)
-		return
-	}
-	slog.Info("helm metadata: parsed", "repo", repoName, "name", meta.Name, "version", meta.Version)
-}
-
-func (p *Provider) AfterDelete(ctx context.Context, repoName, storagePath string, db provider.MetadataDeleter) error {
-	deleter, ok := db.(provider.HelmMetadataDeleter)
-	if !ok {
-		return nil
-	}
-	return deleter.DeleteHelmMetadata(ctx, repoName, storagePath)
-}
-
-func isIndexPath(p string) bool {
-	return strings.TrimPrefix(path.Clean("/"+p), "/") == "index.yaml"
-}
-
-func (p *Provider) ServeLocalIndex(w http.ResponseWriter, r *http.Request, files provider.FileStore, repoName, reqPath string) bool {
-	if !isIndexPath(reqPath) {
-		return false
-	}
-	body, err := p.GenerateLocalIndex(r.Context(), files, repoName, reqPath)
-	if err != nil {
-		http.Error(w, err.Error(), http.StatusInternalServerError)
-		return true
-	}
-	w.Header().Set("Content-Type", "text/yaml")
-	w.WriteHeader(http.StatusOK)
-	_, _ = w.Write(body)
-	return true
-}
-
-func (p *Provider) GenerateLocalIndex(ctx context.Context, files provider.FileStore, repoName, reqPath string) ([]byte, error) {
-	if !isIndexPath(reqPath) {
-		return nil, fmt.Errorf("unsupported index path: %q", reqPath)
-	}
-	reader, ok := files.(provider.HelmMetadataReader)
-	if !ok {
-		return nil, errors.New("helm metadata not available")
-	}
-	metas, err := reader.ListHelmMetadataEntries(ctx, repoName)
-	if err != nil {
-		return nil, err
-	}
-	return generateIndex(metas)
-}
-
-// generateIndex builds index.yaml from stored Chart.yaml documents; it is
-// stamped from the newest upload so every replica serves identical bytes.
-func generateIndex(metas []provider.HelmMetadata) ([]byte, error) {
-	entries := map[string][]map[string]yaml.Node{}
-	var newest time.Time
-	budget := provider.MaxAliasExpandedNodes
-	for _, m := range metas {
-		var raw map[string]yaml.Node
-		if err := yaml.Unmarshal([]byte(m.ChartYAML), &raw); err != nil {
-			return nil, fmt.Errorf("chart %s: %w", m.FilePath, err)
-		}
-		chart, err := provider.ExpandYAMLAliases(raw, &budget)
-		if err != nil {
-			slog.Warn("helm index: dropping chart", "chart", m.Name, "path", m.FilePath, "error", err)
-			continue
-		}
-		chart["name"] = node(m.Name)
-		chart["version"] = node(m.Version)
-		chart["urls"] = node([]string{url.PathEscape(m.FilePath)})
-		chart["digest"] = node(strings.TrimPrefix(m.ContentHash, "sha256:"))
-		chart["created"] = node(m.CreatedAt.UTC().Format(time.RFC3339Nano))
-		entries[m.Name] = append(entries[m.Name], chart)
-		if m.CreatedAt.After(newest) {
-			newest = m.CreatedAt
-		}
-	}
-	return yaml.Marshal(map[string]any{
-		"apiVersion": "v1",
-		"entries":    entries,
-		"generated":  newest.UTC().Format(time.RFC3339Nano),
-	})
-}
-
-func node(v any) yaml.Node {
-	var n yaml.Node
-	_ = n.Encode(v)
-	return n
-}
-
-const (
-	maxChartYAML    = 1 << 20
-	maxChartBytes   = 50 << 20
-	maxChartEntries = 10000
-)
-
-var errChartTooLarge = fmt.Errorf("chart archive exceeds %d decompressed bytes", maxChartBytes)
-
-type capReader struct {
-	r io.Reader
-	n int64
-}
-
-func (c *capReader) Read(p []byte) (int, error) {
-	if c.n <= 0 {
-		return 0, errChartTooLarge
-	}
-	if int64(len(p)) > c.n {
-		p = p[:c.n]
-	}
-	n, err := c.r.Read(p)
-	c.n -= int64(n)
-	return n, err
-}
-
-// parseChart reads the top-level <chart>/Chart.yaml from a packaged chart.
-func parseChart(r io.Reader) (*provider.HelmMetadata, error) {
-	zr, err := gzip.NewReader(r)
-	if err != nil {
-		return nil, err
-	}
-	tr := tar.NewReader(&capReader{r: zr, n: maxChartBytes})
-	for entries := 0; ; entries++ {
-		if entries >= maxChartEntries {
-			return nil, fmt.Errorf("chart archive exceeds %d entries", maxChartEntries)
-		}
-		hdr, err := tr.Next()
-		if err == io.EOF {
-			return nil, errors.New("no Chart.yaml in chart archive")
-		}
-		if err != nil {
-			return nil, err
-		}
-		dir, file := path.Split(path.Clean(hdr.Name))
-		if file != "Chart.yaml" || strings.Count(dir, "/") != 1 {
-			continue
-		}
-		raw, err := io.ReadAll(io.LimitReader(tr, maxChartYAML+1))
-		if err != nil {
-			return nil, err
-		}
-		if len(raw) > maxChartYAML {
-			return nil, fmt.Errorf("parse Chart.yaml: exceeds %d bytes", maxChartYAML)
-		}
-		var chart struct {
-			Name    string `yaml:"name"`
-			Version string `yaml:"version"`
-		}
-		if err := yaml.Unmarshal(raw, &chart); err != nil {
-			return nil, fmt.Errorf("parse Chart.yaml: %w", err)
-		}
-		if chart.Name == "" || chart.Version == "" {
-			return nil, errors.New("chart metadata missing name or version")
-		}
-		return &provider.HelmMetadata{Name: chart.Name, Version: chart.Version, ChartYAML: string(raw)}, nil
-	}
-}

internal/provider/helm/helm_local_test.go

@@ -1,236 +0,0 @@
-package helm
-
-import (
-	"archive/tar"
-	"bytes"
-	"compress/gzip"
-	"context"
-	"io"
-	"net/http/httptest"
-	"strconv"
-	"strings"
-	"testing"
-	"time"
-
-	"gopkg.in/yaml.v3"
-
-	"git.unkin.net/unkin/artifactapi/internal/provider"
-)
-
-func chartTgz(t *testing.T, files map[string]string) []byte {
-	t.Helper()
-	var buf bytes.Buffer
-	zw := gzip.NewWriter(&buf)
-	tw := tar.NewWriter(zw)
-	for name, body := range files {
-		if err := tw.WriteHeader(&tar.Header{Name: name, Mode: 0o644, Size: int64(len(body))}); err != nil {
-			t.Fatal(err)
-		}
-		if _, err := tw.Write([]byte(body)); err != nil {
-			t.Fatal(err)
-		}
-	}
-	if err := tw.Close(); err != nil {
-		t.Fatal(err)
-	}
-	if err := zw.Close(); err != nil {
-		t.Fatal(err)
-	}
-	return buf.Bytes()
-}
-
-type fakeBlobs struct{ data []byte }
-
-func (f fakeBlobs) Download(context.Context, string) (io.ReadCloser, int64, error) {
-	return io.NopCloser(bytes.NewReader(f.data)), int64(len(f.data)), nil
-}
-
-type fakeStore struct {
-	inserted *provider.HelmMetadata
-	metas    []provider.HelmMetadata
-}
-
-func (f *fakeStore) InsertRPMMetadata(context.Context, *provider.RPMMetadata) error { return nil }
-func (f *fakeStore) InsertDebMetadata(context.Context, *provider.DebMetadata) error { return nil }
-func (f *fakeStore) InsertHelmMetadata(_ context.Context, m *provider.HelmMetadata) error {
-	f.inserted = m
-	return nil
-}
-func (f *fakeStore) ListHelmMetadataEntries(context.Context, string) ([]provider.HelmMetadata, error) {
-	return f.metas, nil
-}
-func (f *fakeStore) ListFilesByPrefix(context.Context, string, string) ([]provider.FileEntry, error) {
-	return nil, nil
-}
-func (f *fakeStore) ListPackages(context.Context, string) ([]string, error) { return nil, nil }
-
-func TestValidateUpload(t *testing.T) {
-	p := &Provider{}
-	for in, want := range map[string]string{
-		"mychart-0.1.0.tgz":        "mychart-0.1.0.tgz",
-		"charts/mychart-0.1.0.tgz": "mychart-0.1.0.tgz",
-		"../../mychart-0.1.0.tgz":  "mychart-0.1.0.tgz",
-	} {
-		sp, ct, err := p.ValidateUpload(in)
-		if err != nil || sp != want || ct != "application/gzip" {
-			t.Errorf("ValidateUpload(%q) = %q %q %v", in, sp, ct, err)
-		}
-	}
-	for _, bad := range []string{"index.yaml", "chart.tar.gz", ".tgz", ""} {
-		if _, _, err := p.ValidateUpload(bad); err == nil {
-			t.Errorf("ValidateUpload(%q) accepted", bad)
-		}
-	}
-}
-
-func TestAfterUploadParsesTopLevelChart(t *testing.T) {
-	data := chartTgz(t, map[string]string{
-		"mychart/charts/sub/Chart.yaml": "apiVersion: v2\nname: sub\nversion: 9.9.9\n",
-		"mychart/Chart.yaml":            "apiVersion: v2\nname: mychart\nversion: 1.0\ndescription: hi\n",
-		"mychart/values.yaml":           "a: 1\n",
-	})
-	store := &fakeStore{}
-	(&Provider{}).AfterUpload(context.Background(), "r", "mychart-1.0.tgz", "sha256:ab", fakeBlobs{data}, store)
-	m := store.inserted
-	if m == nil || m.Name != "mychart" || m.Version != "1.0" || m.FilePath != "mychart-1.0.tgz" || m.ContentHash != "sha256:ab" {
-		t.Fatalf("inserted %+v", m)
-	}
-}
-
-func TestAfterUploadRejectsChartWithoutMetadata(t *testing.T) {
-	store := &fakeStore{}
-	data := chartTgz(t, map[string]string{"mychart/Chart.yaml": "apiVersion: v2\nname: mychart\n"})
-	(&Provider{}).AfterUpload(context.Background(), "r", "x.tgz", "sha256:ab", fakeBlobs{data}, store)
-	if store.inserted != nil {
-		t.Fatal("chart without version was recorded")
-	}
-	(&Provider{}).AfterUpload(context.Background(), "r", "x.tgz", "sha256:ab", fakeBlobs{[]byte("not gzip")}, store)
-	if store.inserted != nil {
-		t.Fatal("non-gzip upload was recorded")
-	}
-}
-
-func TestServeLocalIndex(t *testing.T) {
-	t1 := time.Date(2026, 1, 1, 0, 0, 0, 0, time.UTC)
-	t2 := t1.Add(time.Hour)
-	store := &fakeStore{metas: []provider.HelmMetadata{
-		{FilePath: "mychart-1.0.tgz", ContentHash: "sha256:aa", Name: "mychart", Version: "1.0", CreatedAt: t1,
-			ChartYAML: "apiVersion: v2\nname: mychart\nversion: 1.0\nappVersion: \"2\"\ndescription: hi\n"},
-		{FilePath: "other-0.2.0.tgz", ContentHash: "sha256:bb", Name: "other", Version: "0.2.0", CreatedAt: t2,
-			ChartYAML: "apiVersion: v2\nname: other\nversion: 0.2.0\n"},
-	}}
-	p := &Provider{}
-
-	if p.ServeLocalIndex(httptest.NewRecorder(), httptest.NewRequest("GET", "/", nil), store, "r", "mychart-1.0.tgz") {
-		t.Fatal("chart path handled as index")
-	}
-	rec := httptest.NewRecorder()
-	if !p.ServeLocalIndex(rec, httptest.NewRequest("GET", "/", nil), store, "r", "./index.yaml") {
-		t.Fatal("index.yaml not handled")
-	}
-	if rec.Code != 200 || rec.Header().Get("Content-Type") != "text/yaml" {
-		t.Fatalf("code=%d ct=%q", rec.Code, rec.Header().Get("Content-Type"))
-	}
-
-	var idx struct {
-		APIVersion string `yaml:"apiVersion"`
-		Generated  string `yaml:"generated"`
-		Entries    map[string][]map[string]any
-	}
-	if err := yaml.Unmarshal(rec.Body.Bytes(), &idx); err != nil {
-		t.Fatal(err)
-	}
-	if idx.APIVersion != "v1" || idx.Generated != t2.Format(time.RFC3339Nano) {
-		t.Errorf("header %+v", idx)
-	}
-	e := idx.Entries["mychart"][0]
-	if e["digest"] != "aa" || e["description"] != "hi" || e["appVersion"] != "2" || e["apiVersion"] != "v2" {
-		t.Errorf("entry %v", e)
-	}
-	if urls, _ := e["urls"].([]any); len(urls) != 1 || urls[0] != "mychart-1.0.tgz" {
-		t.Errorf("urls %v", e["urls"])
-	}
-	if e["version"] != "1.0" || e["name"] != "mychart" {
-		t.Errorf("version must stay a string: %#v", e["version"])
-	}
-	if len(idx.Entries["other"]) != 1 {
-		t.Errorf("other entries %v", idx.Entries["other"])
-	}
-
-	again, err := p.GenerateLocalIndex(context.Background(), store, "r", "index.yaml")
-	if err != nil || !bytes.Equal(again, rec.Body.Bytes()) {
-		t.Errorf("index not deterministic: %v", err)
-	}
-}
-
-func TestAfterUploadRejectsFilenameMismatch(t *testing.T) {
-	store := &fakeStore{}
-	data := chartTgz(t, map[string]string{"mychart/Chart.yaml": "apiVersion: v2\nname: mychart\nversion: 1.0.0\n"})
-	(&Provider{}).AfterUpload(context.Background(), "r", "other-1.0.0.tgz", "sha256:ab", fakeBlobs{data}, store)
-	if store.inserted != nil {
-		t.Fatal("chart indexed under a filename that does not match name-version")
-	}
-}
-
-func TestParseChartLimits(t *testing.T) {
-	chart := "apiVersion: v2\nname: c\nversion: 1.0.0\n"
-	for name, tc := range map[string]struct {
-		files map[string]string
-		want  string
-	}{
-		"decompressed": {map[string]string{"c/a.bin": strings.Repeat("\x00", maxChartBytes+1)}, "decompressed bytes"},
-		"chart yaml":   {map[string]string{"c/Chart.yaml": chart + "#" + strings.Repeat("x", maxChartYAML)}, "Chart.yaml: exceeds"},
-	} {
-		_, err := parseChart(bytes.NewReader(chartTgz(t, tc.files)))
-		if err == nil || !strings.Contains(err.Error(), tc.want) {
-			t.Errorf("%s: err = %v, want %q", name, err, tc.want)
-		}
-	}
-
-	var buf bytes.Buffer
-	zw := gzip.NewWriter(&buf)
-	tw := tar.NewWriter(zw)
-	for i := 0; i <= maxChartEntries; i++ {
-		_ = tw.WriteHeader(&tar.Header{Name: "c/templates/" + strconv.Itoa(i), Mode: 0o644})
-	}
-	_ = tw.WriteHeader(&tar.Header{Name: "c/Chart.yaml", Mode: 0o644, Size: int64(len(chart))})
-	_, _ = tw.Write([]byte(chart))
-	_ = tw.Close()
-	_ = zw.Close()
-	if _, err := parseChart(&buf); err == nil || !strings.Contains(err.Error(), "entries") {
-		t.Errorf("entries: err = %v", err)
-	}
-
-	if m, err := parseChart(bytes.NewReader(chartTgz(t, map[string]string{"c/Chart.yaml": chart}))); err != nil || m.Name != "c" {
-		t.Errorf("valid chart: %v %v", m, err)
-	}
-}
-
-func TestIndexEscapesURLs(t *testing.T) {
-	out, err := generateIndex([]provider.HelmMetadata{{FilePath: "my chart-1.0.0.tgz", Name: "my chart", Version: "1.0.0", ChartYAML: "name: x\n"}})
-	if err != nil {
-		t.Fatal(err)
-	}
-	if !strings.Contains(string(out), "my%20chart-1.0.0.tgz") {
-		t.Errorf("url not escaped:\n%s", out)
-	}
-}
-
-func TestIndexExpandsAliasesBeforeOverride(t *testing.T) {
-	body, err := generateIndex([]provider.HelmMetadata{{
-		FilePath: "app-1.0.0.tgz", ContentHash: "sha256:aa", Name: "app", Version: "1.0.0",
-		ChartYAML: "apiVersion: v2\nname: app\nversion: &v 1.0.0\nappVersion: *v\n",
-	}})
-	if err != nil {
-		t.Fatal(err)
-	}
-	var idx struct {
-		Entries map[string][]map[string]any
-	}
-	if err := yaml.Unmarshal(body, &idx); err != nil {
-		t.Fatalf("index does not parse: %v\n%s", err, body)
-	}
-	if e := idx.Entries["app"]; len(e) != 1 || e[0]["appVersion"] != "1.0.0" {
-		t.Errorf("entries %v", idx.Entries)
-	}
-}

internal/provider/metadata_alpine.go

@@ -1,49 +0,0 @@
-package provider
-
-import (
-	"context"
-)
-
-// AlpineMetadataStore / AlpineMetadataDeleter / AlpineMetadataReader are the
-// Alpine-specific persistence surfaces. They are kept separate from the shared
-// RPM/Deb metadata interfaces so the apk provider can type-assert the generic
-// MetadataStore/MetadataDeleter/FileStore it is handed without widening (and
-// thus perturbing the test doubles of) the rpm and deb providers. *database.DB
-// satisfies all three.
-type AlpineMetadataStore interface {
-	InsertAlpineMetadata(ctx context.Context, meta *AlpineMetadata) error
-}
-
-type AlpineMetadataDeleter interface {
-	DeleteAlpineMetadata(ctx context.Context, repoName, filePath string) error
-}
-
-type AlpineMetadataReader interface {
-	ListAlpineMetadataEntries(ctx context.Context, repoName string) ([]AlpineMetadata, error)
-}
-
-// AlpineMetadata is the derived per-package metadata for an Alpine .apk, holding
-// the fields an APKINDEX record carries plus the apk pull checksum (Q1…, the
-// sha1 of the control gzip stream) and the download/installed sizes.
-type AlpineMetadata struct {
-	RepoName         string
-	FilePath         string
-	ContentHash      string
-	Checksum         string   // C: "Q1" + base64(sha1(control gzip stream))
-	Name             string   // P:
-	Version          string   // V:
-	Arch             string   // A:
-	DownloadSize     int64    // S: on-disk .apk size
-	InstalledSize    int64    // I: unpacked size from .PKGINFO
-	Description      string   // T:
-	URL              string   // U:
-	License          string   // L:
-	Origin           string   // o:
-	Maintainer       string   // m:
-	BuildTime        int64    // t:
-	Commit           string   // c:
-	ProviderPriority string   // k:
-	Depends          []string // D:
-	Provides         []string // p:
-	InstallIf        []string // i:
-}

internal/provider/metadata_deb.go

@@ -1,34 +0,0 @@
-package provider
-
-import (
-	"context"
-	"time"
-)
-
-// DebMetadataReader is the read surface the deb LocalIndexer needs to
-// regenerate a flat apt repository (Packages/Release) from stored rows.
-// *database.DB satisfies it; ServeLocalIndex type-asserts the FileStore to it,
-// mirroring how the rpm provider reaches its RPMMetadataReader.
-type DebMetadataReader interface {
-	ListDebMetadataEntries(ctx context.Context, repoName string) ([]DebMetadata, error)
-}
-
-// DebMetadata is the derived per-package metadata for a Debian .deb, carrying
-// the full raw control stanza so the Packages index can be regenerated
-// faithfully alongside the computed size/md5/sha256 apt requires.
-type DebMetadata struct {
-	RepoName     string
-	FilePath     string
-	ContentHash  string
-	Name         string
-	Version      string
-	Architecture string
-	Control      string
-	Size         int64
-	MD5          string
-	SHA256       string
-	// CreatedAt is the persisted insert time; the Release Date: is derived from
-	// the newest value so the index is byte-identical across replicas and
-	// regenerations (issue #117) rather than stamped from wall clock.
-	CreatedAt time.Time
-}

internal/provider/metadata_helm.go

@@ -1,30 +0,0 @@
-package provider
-
-import (
-	"context"
-	"time"
-)
-
-type HelmMetadataStore interface {
-	InsertHelmMetadata(ctx context.Context, meta *HelmMetadata) error
-}
-
-type HelmMetadataDeleter interface {
-	DeleteHelmMetadata(ctx context.Context, repoName, filePath string) error
-}
-
-type HelmMetadataReader interface {
-	ListHelmMetadataEntries(ctx context.Context, repoName string) ([]HelmMetadata, error)
-}
-
-// HelmMetadata is a local chart's Chart.yaml, kept verbatim so index.yaml
-// entries carry every field helm reads.
-type HelmMetadata struct {
-	RepoName    string
-	FilePath    string
-	ContentHash string
-	Name        string
-	Version     string
-	ChartYAML   string
-	CreatedAt   time.Time
-}

internal/provider/metadata_puppet.go

@@ -1,32 +0,0 @@
-package provider
-
-import (
-	"context"
-	"time"
-)
-
-type PuppetMetadataStore interface {
-	InsertPuppetMetadata(ctx context.Context, meta *PuppetMetadata) error
-}
-
-type PuppetMetadataDeleter interface {
-	DeletePuppetMetadata(ctx context.Context, repoName, filePath string) error
-}
-
-type PuppetMetadataReader interface {
-	ListPuppetMetadataEntries(ctx context.Context, repoName, slug string) ([]PuppetMetadata, error)
-}
-
-// PuppetMetadata is a local module release; MetadataJSON is the tarball's
-// metadata.json verbatim so Forge release objects carry every field.
-type PuppetMetadata struct {
-	RepoName     string
-	FilePath     string
-	ContentHash  string
-	Slug         string
-	Version      string
-	MetadataJSON string
-	Size         int64
-	MD5          string
-	CreatedAt    time.Time
-}

internal/provider/metadata_rpm.go

@@ -1,60 +0,0 @@
-package provider
-
-import (
-	"context"
-	"time"
-)
-
-type RPMMetadataReader interface {
-	ListRPMMetadataEntries(ctx context.Context, repoName string) ([]RPMMetadata, error)
-}
-
-type RPMMetadata struct {
-	RepoName      string
-	FilePath      string
-	ContentHash   string
-	Name          string
-	Epoch         int
-	Version       string
-	Release       string
-	Arch          string
-	Summary       string
-	Description   string
-	RPMSize       int64
-	InstalledSize int64
-	License       string
-	Vendor        string
-	Group         string
-	BuildHost     string
-	SourceRPM     string
-	URL           string
-	Packager      string
-	Requires      []RPMDep
-	Provides      []RPMDep
-	Conflicts     []RPMDep
-	Obsoletes     []RPMDep
-	Files         []RPMFile
-	Changelogs    []RPMChangelog
-	// CreatedAt is the persisted upload timestamp; used as a stable, replica-independent
-	// value for the repodata <time>/<revision> fields so generated indexes are deterministic.
-	CreatedAt time.Time
-}
-
-type RPMDep struct {
-	Name    string `json:"name"`
-	Flags   string `json:"flags,omitempty"`
-	Epoch   string `json:"epoch,omitempty"`
-	Version string `json:"version,omitempty"`
-	Release string `json:"release,omitempty"`
-}
-
-type RPMFile struct {
-	Path string `json:"path"`
-	Type string `json:"type,omitempty"`
-}
-
-type RPMChangelog struct {
-	Author string `json:"author"`
-	Date   int64  `json:"date"`
-	Text   string `json:"text"`
-}

internal/provider/metadata_store.go

@@ -1,15 +0,0 @@
-package provider
-
-import (
-	"context"
-)
-
-type MetadataStore interface {
-	InsertRPMMetadata(ctx context.Context, meta *RPMMetadata) error
-	InsertDebMetadata(ctx context.Context, meta *DebMetadata) error
-}
-
-type MetadataDeleter interface {
-	DeleteRPMMetadata(ctx context.Context, repoName, filePath string) error
-	DeleteDebMetadata(ctx context.Context, repoName, filePath string) error
-}

internal/provider/npm/npm.go

@@ -37,8 +37,6 @@ func (p *Provider) UpstreamURL(remote models.Remote, path string) string {
 	return strings.TrimRight(remote.BaseURL, "/") + "/" + strings.TrimLeft(path, "/")
 }
 
-func (p *Provider) RewritesResponse() {}
-
 func (p *Provider) RewriteResponse(body []byte, remote models.Remote, proxyBaseURL string) ([]byte, error) {
 	if proxyBaseURL == "" || !json.Valid(body) {
 		return nil, nil

internal/provider/nuget/nuget.go

@@ -1,6 +1,5 @@
 // Package nuget proxies a NuGet v3 feed: the service index, registration pages
-// and flat container indexes are mutable; package, symbol, nuspec, readme and
-// icon blobs are immutable.
+// and flat container indexes are mutable, .nupkg/.nuspec downloads immutable.
 package nuget
 
 import (
@@ -8,7 +7,6 @@ import (
 	"encoding/json"
 	"net/http"
 	"net/url"
-	pathpkg "path"
 	"strings"
 
 	"git.unkin.net/unkin/artifactapi/internal/auth"
@@ -36,12 +34,10 @@ func (p *Provider) Classify(path string) provider.Mutability {
 
 func (p *Provider) ContentType(path string) string {
 	switch {
-	case strings.HasSuffix(path, ".nupkg"), strings.HasSuffix(path, ".snupkg"), pathpkg.Base(path) == "icon":
+	case strings.HasSuffix(path, ".nupkg"):
 		return "application/octet-stream"
 	case strings.HasSuffix(path, ".nuspec"):
 		return "application/xml"
-	case pathpkg.Base(path) == "readme":
-		return "text/markdown"
 	}
 	return "application/json"
 }
@@ -68,8 +64,8 @@ func (p *Provider) RewriteServed(body []byte, remote models.Remote, proxyBaseURL
 	if from == "" || !json.Valid(body) {
 		return body
 	}
-	to, _ := json.Marshal(strings.TrimRight(proxyBaseURL, "/") + "/api/v1/remote/" + remote.Name)
-	return []byte(strings.ReplaceAll(string(body), from, string(to[1:len(to)-1])))
+	to := strings.TrimRight(proxyBaseURL, "/") + "/api/v1/remote/" + remote.Name
+	return []byte(strings.ReplaceAll(string(body), from, to))
 }
 
 func (p *Provider) AuthHeaders(_ context.Context, remote models.Remote) (http.Header, error) {
@@ -84,14 +80,6 @@ func origin(baseURL string) string {
 	return u.Scheme + "://" + u.Host
 }
 
-// isPackage matches flat container blobs: {id}.{ver}.(s)nupkg, {id}.nuspec and
-// the {id}/{ver}/readme and {id}/{ver}/icon files.
 func isPackage(path string) bool {
-	for _, ext := range []string{".nupkg", ".snupkg", ".nuspec"} {
-		if strings.HasSuffix(path, ext) {
-			return true
-		}
-	}
-	base := pathpkg.Base(path)
-	return (base == "readme" || base == "icon") && strings.Count(strings.Trim(path, "/"), "/") >= 2
+	return strings.HasSuffix(path, ".nupkg") || strings.HasSuffix(path, ".nuspec")
 }

internal/provider/nuget/nuget_test.go

@@ -19,11 +19,7 @@ func TestClassify(t *testing.T) {
 	}{
 		{"v3-flatcontainer/newtonsoft.json/13.0.3/newtonsoft.json.13.0.3.nupkg", provider.Immutable},
 		{"v3-flatcontainer/newtonsoft.json/13.0.3/newtonsoft.json.nuspec", provider.Immutable},
-		{"v3-flatcontainer/newtonsoft.json/13.0.3/newtonsoft.json.13.0.3.snupkg", provider.Immutable},
-		{"v3-flatcontainer/newtonsoft.json/13.0.3/readme", provider.Immutable},
-		{"v3-flatcontainer/newtonsoft.json/13.0.3/icon", provider.Immutable},
 		{"v3-flatcontainer/newtonsoft.json/index.json", provider.Mutable},
-		{"readme", provider.Mutable},
 		{"v3/registration5-gz-semver2/newtonsoft.json/index.json", provider.Mutable},
 		{"index.json", provider.Mutable},
 	}
@@ -34,28 +30,6 @@ func TestClassify(t *testing.T) {
 	}
 }
 
-func TestContentType(t *testing.T) {
-	p := &Provider{}
-	for path, want := range map[string]string{
-		"v3-flatcontainer/a/1.0.0/a.1.0.0.snupkg": "application/octet-stream",
-		"v3-flatcontainer/a/1.0.0/icon":           "application/octet-stream",
-		"v3-flatcontainer/a/1.0.0/readme":         "text/markdown",
-		"v3-flatcontainer/a/index.json":           "application/json",
-	} {
-		if got := p.ContentType(path); got != want {
-			t.Errorf("ContentType(%q) = %q, want %q", path, got, want)
-		}
-	}
-}
-
-func TestRewriteServedEscapesJSON(t *testing.T) {
-	body := `{"@id":"https://api.nuget.org/v3-flatcontainer/"}`
-	got := (&Provider{}).RewriteServed([]byte(body), nugetOrg, `http://evil"<x>`)
-	if want := `{"@id":"http://evil\"\u003cx\u003e/api/v1/remote/nuget-org/v3-flatcontainer/"}`; string(got) != want {
-		t.Errorf("RewriteServed = %s, want %s", got, want)
-	}
-}
-
 func TestUpstreamURL(t *testing.T) {
 	p := &Provider{}
 	tests := []struct {

internal/provider/provider.go

@@ -3,7 +3,9 @@ package provider
 import (
 	"context"
 	"fmt"
+	"io"
 	"net/http"
+	"time"
 
 	"git.unkin.net/unkin/artifactapi/pkg/models"
 )
@@ -29,6 +31,205 @@ type FileEntry struct {
 	ContentHash string
 }
 
+type FileStore interface {
+	ListFilesByPrefix(ctx context.Context, repoName, prefix string) ([]FileEntry, error)
+	ListPackages(ctx context.Context, repoName string) ([]string, error)
+}
+
+type LocalUploader interface {
+	ValidateUpload(filePath string) (storagePath, contentType string, err error)
+	UploadResponse(storagePath, contentHash string, sizeBytes int64) map[string]any
+}
+
+type LocalIndexer interface {
+	ServeLocalIndex(w http.ResponseWriter, r *http.Request, files FileStore, repoName, path string) bool
+	GenerateLocalIndex(ctx context.Context, files FileStore, repoName, path string) ([]byte, error)
+}
+
+type BlobReader interface {
+	Download(ctx context.Context, key string) (io.ReadCloser, int64, error)
+}
+
+type PostUploadHook interface {
+	AfterUpload(ctx context.Context, repoName, storagePath, contentHash string, blobs BlobReader, db MetadataStore)
+}
+
+// PostDeleteHook lets a provider clean up derived state (e.g. RPM metadata that
+// feeds generated repodata) after a local file is removed.
+type PostDeleteHook interface {
+	AfterDelete(ctx context.Context, repoName, storagePath string, db MetadataDeleter) error
+}
+
+type MetadataStore interface {
+	InsertRPMMetadata(ctx context.Context, meta *RPMMetadata) error
+	InsertDebMetadata(ctx context.Context, meta *DebMetadata) error
+}
+
+// RemoteServer lets a remote provider fully answer a request itself instead of
+// going through the byte-proxy engine. It is the remote-side analog of
+// LocalIndexer: a metadata-only remote (e.g. github_rpm) uses it to synthesize
+// repodata from derived per-asset metadata and to redirect package downloads to
+// a backend remote, without ever precaching the packages. Returning false lets
+// the normal proxy path take over.
+type RemoteServer interface {
+	ServeRemote(w http.ResponseWriter, r *http.Request, remote models.Remote, path, proxyBaseURL string, store RemoteMetadataStore) bool
+}
+
+// ServeRewriter rewrites a cached mutable remote response per request, for
+// indexes whose URLs must name the requesting host and so cannot be rewritten
+// before caching.
+type ServeRewriter interface {
+	RewriteServed(body []byte, remote models.Remote, proxyBaseURL string) []byte
+}
+
+// RemoteMetadataStore is the persistence surface a RemoteServer needs to cache
+// and read the metadata it derives per upstream asset. *database.DB satisfies it.
+type RemoteMetadataStore interface {
+	RPMMetadataReader
+	MetadataStore
+	MetadataDeleter
+}
+
+type MetadataDeleter interface {
+	DeleteRPMMetadata(ctx context.Context, repoName, filePath string) error
+	DeleteDebMetadata(ctx context.Context, repoName, filePath string) error
+}
+
+type RPMMetadataReader interface {
+	ListRPMMetadataEntries(ctx context.Context, repoName string) ([]RPMMetadata, error)
+}
+
+// DebMetadataReader is the read surface the deb LocalIndexer needs to
+// regenerate a flat apt repository (Packages/Release) from stored rows.
+// *database.DB satisfies it; ServeLocalIndex type-asserts the FileStore to it,
+// mirroring how the rpm provider reaches its RPMMetadataReader.
+type DebMetadataReader interface {
+	ListDebMetadataEntries(ctx context.Context, repoName string) ([]DebMetadata, error)
+}
+
+// DebMetadata is the derived per-package metadata for a Debian .deb, carrying
+// the full raw control stanza so the Packages index can be regenerated
+// faithfully alongside the computed size/md5/sha256 apt requires.
+type DebMetadata struct {
+	RepoName     string
+	FilePath     string
+	ContentHash  string
+	Name         string
+	Version      string
+	Architecture string
+	Control      string
+	Size         int64
+	MD5          string
+	SHA256       string
+	// CreatedAt is the persisted insert time; the Release Date: is derived from
+	// the newest value so the index is byte-identical across replicas and
+	// regenerations (issue #117) rather than stamped from wall clock.
+	CreatedAt time.Time
+}
+
+// AlpineMetadataStore / AlpineMetadataDeleter / AlpineMetadataReader are the
+// Alpine-specific persistence surfaces. They are kept separate from the shared
+// RPM/Deb metadata interfaces so the apk provider can type-assert the generic
+// MetadataStore/MetadataDeleter/FileStore it is handed without widening (and
+// thus perturbing the test doubles of) the rpm and deb providers. *database.DB
+// satisfies all three.
+type AlpineMetadataStore interface {
+	InsertAlpineMetadata(ctx context.Context, meta *AlpineMetadata) error
+}
+
+type AlpineMetadataDeleter interface {
+	DeleteAlpineMetadata(ctx context.Context, repoName, filePath string) error
+}
+
+type AlpineMetadataReader interface {
+	ListAlpineMetadataEntries(ctx context.Context, repoName string) ([]AlpineMetadata, error)
+}
+
+// AlpineMetadata is the derived per-package metadata for an Alpine .apk, holding
+// the fields an APKINDEX record carries plus the apk pull checksum (Q1…, the
+// sha1 of the control gzip stream) and the download/installed sizes.
+type AlpineMetadata struct {
+	RepoName         string
+	FilePath         string
+	ContentHash      string
+	Checksum         string   // C: "Q1" + base64(sha1(control gzip stream))
+	Name             string   // P:
+	Version          string   // V:
+	Arch             string   // A:
+	DownloadSize     int64    // S: on-disk .apk size
+	InstalledSize    int64    // I: unpacked size from .PKGINFO
+	Description      string   // T:
+	URL              string   // U:
+	License          string   // L:
+	Origin           string   // o:
+	Maintainer       string   // m:
+	BuildTime        int64    // t:
+	Commit           string   // c:
+	ProviderPriority string   // k:
+	Depends          []string // D:
+	Provides         []string // p:
+	InstallIf        []string // i:
+}
+
+type RPMMetadata struct {
+	RepoName      string
+	FilePath      string
+	ContentHash   string
+	Name          string
+	Epoch         int
+	Version       string
+	Release       string
+	Arch          string
+	Summary       string
+	Description   string
+	RPMSize       int64
+	InstalledSize int64
+	License       string
+	Vendor        string
+	Group         string
+	BuildHost     string
+	SourceRPM     string
+	URL           string
+	Packager      string
+	Requires      []RPMDep
+	Provides      []RPMDep
+	Conflicts     []RPMDep
+	Obsoletes     []RPMDep
+	Files         []RPMFile
+	Changelogs    []RPMChangelog
+	// CreatedAt is the persisted upload timestamp; used as a stable, replica-independent
+	// value for the repodata <time>/<revision> fields so generated indexes are deterministic.
+	CreatedAt time.Time
+}
+
+type RPMDep struct {
+	Name    string `json:"name"`
+	Flags   string `json:"flags,omitempty"`
+	Epoch   string `json:"epoch,omitempty"`
+	Version string `json:"version,omitempty"`
+	Release string `json:"release,omitempty"`
+}
+
+type RPMFile struct {
+	Path string `json:"path"`
+	Type string `json:"type,omitempty"`
+}
+
+type RPMChangelog struct {
+	Author string `json:"author"`
+	Date   int64  `json:"date"`
+	Text   string `json:"text"`
+}
+
+type IndexMerger interface {
+	MergeIndexes(members []MemberIndex, proxyBaseURL string) ([]byte, error)
+}
+
+type MemberIndex struct {
+	RemoteName string
+	Body       []byte
+}
+
 var registry = map[models.PackageType]Provider{}
 
 func Register(p Provider) {

internal/provider/puppet/local.go

@@ -1,393 +0,0 @@
-package puppet
-
-import (
-	"archive/tar"
-	"compress/gzip"
-	"context"
-	"crypto/md5"
-	"encoding/hex"
-	"encoding/json"
-	"errors"
-	"fmt"
-	"io"
-	"log/slog"
-	"net/http"
-	"net/url"
-	"path"
-	"regexp"
-	"slices"
-	"strconv"
-	"strings"
-
-	"git.unkin.net/unkin/artifactapi/internal/provider"
-	"git.unkin.net/unkin/artifactapi/internal/storage"
-)
-
-const filesPrefix = "v3/files/"
-
-// releaseRe matches <owner>-<name>-<semver>, the Forge release slug and the
-// tarball basename that `puppet module build` produces.
-var releaseRe = regexp.MustCompile(`^([a-z0-9]+)-([a-z][a-z0-9_]*)-(\d+\.\d+\.\d+(?:-[0-9a-z.-]+)?(?:\+[0-9a-z.-]+)?)$`)
-
-func parseRelease(s string) (slug, version string, ok bool) {
-	m := releaseRe.FindStringSubmatch(strings.ToLower(s))
-	if m == nil {
-		return "", "", false
-	}
-	return m[1] + "-" + m[2], m[3], true
-}
-
-func normalizeSlug(s string) string {
-	return strings.ToLower(strings.ReplaceAll(s, "/", "-"))
-}
-
-// ValidateUpload stores tarballs under v3/files/ so Forge file_uri downloads
-// resolve straight to the stored file.
-func (p *Provider) ValidateUpload(filePath string) (storagePath, contentType string, err error) {
-	filename := strings.ToLower(path.Base(path.Clean("/" + filePath)))
-	if _, _, ok := parseRelease(strings.TrimSuffix(filename, ".tar.gz")); !ok || !strings.HasSuffix(filename, ".tar.gz") {
-		return "", "", fmt.Errorf("file must be named <owner>-<module>-<version>.tar.gz")
-	}
-	return filesPrefix + filename, "application/gzip", nil
-}
-
-func (p *Provider) UploadResponse(storagePath, contentHash string, sizeBytes int64) map[string]any {
-	return map[string]any{
-		"filename":     path.Base(storagePath),
-		"content_hash": contentHash,
-		"size_bytes":   sizeBytes,
-	}
-}
-
-func (p *Provider) AfterUpload(ctx context.Context, repoName, storagePath, contentHash string, blobs provider.BlobReader, db provider.MetadataStore) {
-	reader, size, err := blobs.Download(ctx, storage.BlobKey(strings.TrimPrefix(contentHash, "sha256:")))
-	if err != nil {
-		slog.Error("puppet metadata: download failed", "repo", repoName, "path", storagePath, "error", err)
-		return
-	}
-	defer func() { _ = reader.Close() }()
-	if size > maxModuleTarball {
-		slog.Error("puppet metadata: tarball too large", "repo", repoName, "path", storagePath, "size", size)
-		return
-	}
-
-	hash := md5.New()
-	src := io.TeeReader(io.LimitReader(reader, maxModuleTarball), hash)
-	meta, err := parseModule(src)
-	if err != nil {
-		slog.Error("puppet metadata: parse failed", "repo", repoName, "path", storagePath, "error", err)
-		return
-	}
-	if _, err := io.Copy(io.Discard, src); err != nil {
-		slog.Error("puppet metadata: read failed", "repo", repoName, "path", storagePath, "error", err)
-		return
-	}
-	slug, version, _ := parseRelease(strings.TrimSuffix(path.Base(storagePath), ".tar.gz"))
-	if meta.Slug != slug || meta.Version != version {
-		slog.Error("puppet metadata: metadata.json does not match filename", "repo", repoName, "path", storagePath, "name", meta.Slug, "version", meta.Version)
-		return
-	}
-	meta.RepoName = repoName
-	meta.FilePath = storagePath
-	meta.ContentHash = contentHash
-	meta.Size = size
-	meta.MD5 = hex.EncodeToString(hash.Sum(nil))
-
-	store, ok := db.(provider.PuppetMetadataStore)
-	if !ok {
-		slog.Error("puppet metadata: store does not support puppet metadata", "repo", repoName)
-		return
-	}
-	if err := store.InsertPuppetMetadata(ctx, meta); err != nil {
-		slog.Error("puppet metadata: insert failed", "repo", repoName, "path", storagePath, "error", err)
-		return
-	}
-	slog.Info("puppet metadata: parsed", "repo", repoName, "module", meta.Slug, "version", meta.Version)
-}
-
-func (p *Provider) AfterDelete(ctx context.Context, repoName, storagePath string, db provider.MetadataDeleter) error {
-	deleter, ok := db.(provider.PuppetMetadataDeleter)
-	if !ok {
-		return nil
-	}
-	return deleter.DeletePuppetMetadata(ctx, repoName, storagePath)
-}
-
-const maxMetadataJSON = 1 << 20
-
-var (
-	maxModuleTarball int64 = 100 << 20
-	maxModuleScan    int64 = 200 << 20
-)
-
-// parseModule reads the top-level <dir>/metadata.json from a module tarball,
-// scanning at most maxModuleScan decompressed bytes.
-func parseModule(r io.Reader) (*provider.PuppetMetadata, error) {
-	zr, err := gzip.NewReader(r)
-	if err != nil {
-		return nil, err
-	}
-	scan := &io.LimitedReader{R: zr, N: maxModuleScan}
-	tr := tar.NewReader(scan)
-	for {
-		hdr, err := tr.Next()
-		if scan.N <= 0 {
-			return nil, errors.New("module tarball exceeds decompressed scan limit before metadata.json")
-		}
-		if err == io.EOF {
-			return nil, errors.New("no metadata.json in module tarball")
-		}
-		if err != nil {
-			return nil, err
-		}
-		dir, file := path.Split(strings.TrimPrefix(path.Clean(hdr.Name), "./"))
-		if hdr.Typeflag != tar.TypeReg || file != "metadata.json" || strings.Count(dir, "/") != 1 {
-			continue
-		}
-		body, err := io.ReadAll(io.LimitReader(tr, maxMetadataJSON))
-		if err != nil {
-			return nil, err
-		}
-		var md struct {
-			Name    string `json:"name"`
-			Version string `json:"version"`
-		}
-		if err := json.Unmarshal(body, &md); err != nil {
-			return nil, fmt.Errorf("parse metadata.json: %w", err)
-		}
-		if md.Name == "" || md.Version == "" {
-			return nil, errors.New("metadata.json missing name or version")
-		}
-		return &provider.PuppetMetadata{Slug: normalizeSlug(md.Name), Version: md.Version, MetadataJSON: string(body)}, nil
-	}
-}
-
-func (p *Provider) ServeLocalIndex(w http.ResponseWriter, r *http.Request, files provider.FileStore, repoName, reqPath string) bool {
-	clean := strings.TrimPrefix(path.Clean("/"+reqPath), "/")
-	var list func(slug string) ([]provider.PuppetMetadata, error)
-	if reader, ok := files.(provider.PuppetMetadataReader); ok {
-		list = func(slug string) ([]provider.PuppetMetadata, error) {
-			metas, err := reader.ListPuppetMetadataEntries(r.Context(), repoName, slug)
-			sortReleases(metas)
-			return metas, err
-		}
-	} else {
-		list = func(string) ([]provider.PuppetMetadata, error) {
-			return nil, errors.New("puppet metadata not available")
-		}
-	}
-
-	switch {
-	case clean == "v3/releases":
-		serveReleaseList(w, r, list)
-	case strings.HasPrefix(clean, "v3/releases/"):
-		slug, version, ok := parseRelease(strings.TrimPrefix(clean, "v3/releases/"))
-		if !ok {
-			notFound(w)
-			return true
-		}
-		metas, err := list(slug)
-		if err != nil {
-			http.Error(w, err.Error(), http.StatusInternalServerError)
-			return true
-		}
-		for _, m := range metas {
-			if m.Version == version {
-				writeJSON(w, releaseObject(m))
-				return true
-			}
-		}
-		notFound(w)
-	case strings.HasPrefix(clean, "v3/modules/"):
-		slug := normalizeSlug(strings.TrimPrefix(clean, "v3/modules/"))
-		metas, err := list(slug)
-		if err != nil {
-			http.Error(w, err.Error(), http.StatusInternalServerError)
-			return true
-		}
-		if len(metas) == 0 {
-			notFound(w)
-			return true
-		}
-		writeJSON(w, moduleObject(metas))
-	default:
-		return false
-	}
-	return true
-}
-
-func (p *Provider) GenerateLocalIndex(ctx context.Context, files provider.FileStore, repoName, path string) ([]byte, error) {
-	return nil, fmt.Errorf("puppet local index generation for virtual repos not supported")
-}
-
-func serveReleaseList(w http.ResponseWriter, r *http.Request, list func(string) ([]provider.PuppetMetadata, error)) {
-	q := r.URL.Query()
-	slug := normalizeSlug(q.Get("module"))
-	limit, err := strconv.Atoi(q.Get("limit"))
-	if err != nil || limit <= 0 {
-		limit = 20
-	}
-	limit = min(limit, 100)
-	offset, err := strconv.Atoi(q.Get("offset"))
-	if err != nil || offset < 0 {
-		offset = 0
-	}
-
-	metas, err := list(slug)
-	if err != nil {
-		http.Error(w, err.Error(), http.StatusInternalServerError)
-		return
-	}
-	offset = min(offset, len(metas))
-	results := []map[string]any{}
-	for _, m := range metas[offset : offset+min(limit, len(metas)-offset)] {
-		results = append(results, releaseObject(m))
-	}
-
-	page := func(off int) any {
-		if off < 0 || off >= len(metas) && off != 0 {
-			return nil
-		}
-		v := url.Values{"limit": {strconv.Itoa(limit)}, "offset": {strconv.Itoa(off)}}
-		if slug != "" {
-			v.Set("module", slug)
-		}
-		return "/v3/releases?" + v.Encode()
-	}
-	var previous any
-	if offset > 0 {
-		previous = page(max(offset-limit, 0))
-	}
-	writeJSON(w, map[string]any{
-		"pagination": map[string]any{
-			"limit":    limit,
-			"offset":   offset,
-			"first":    page(0),
-			"previous": previous,
-			"current":  page(offset),
-			"next":     page(offset + limit),
-			"total":    len(metas),
-		},
-		"results": results,
-	})
-}
-
-func owner(slug string) map[string]any {
-	name, _, _ := strings.Cut(slug, "-")
-	return map[string]any{"uri": "/v3/users/" + name, "slug": name, "username": name}
-}
-
-func moduleRef(slug string) map[string]any {
-	_, name, _ := strings.Cut(slug, "-")
-	return map[string]any{"uri": "/v3/modules/" + slug, "slug": slug, "name": name, "deprecated_at": nil, "owner": owner(slug)}
-}
-
-const forgeTime = "2006-01-02 15:04:05 -0700"
-
-func releaseObject(m provider.PuppetMetadata) map[string]any {
-	slug := m.Slug + "-" + m.Version
-	return map[string]any{
-		"uri":         "/v3/releases/" + slug,
-		"slug":        slug,
-		"module":      moduleRef(m.Slug),
-		"version":     m.Version,
-		"metadata":    json.RawMessage(m.MetadataJSON),
-		"tags":        []string{},
-		"supported":   false,
-		"pdk":         false,
-		"file_uri":    "/" + m.FilePath,
-		"file_size":   m.Size,
-		"file_md5":    m.MD5,
-		"file_sha256": strings.TrimPrefix(m.ContentHash, "sha256:"),
-		"downloads":   0,
-		"readme":      nil,
-		"changelog":   nil,
-		"license":     nil,
-		"created_at":  m.CreatedAt.Format(forgeTime),
-		"updated_at":  m.CreatedAt.Format(forgeTime),
-		"deleted_at":  nil,
-	}
-}
-
-// moduleObject expects metas sorted newest version first.
-func moduleObject(metas []provider.PuppetMetadata) map[string]any {
-	obj := moduleRef(metas[0].Slug)
-	releases := make([]map[string]any, 0, len(metas))
-	for _, m := range metas {
-		slug := m.Slug + "-" + m.Version
-		releases = append(releases, map[string]any{
-			"uri": "/v3/releases/" + slug, "slug": slug, "version": m.Version,
-			"file_uri": "/" + m.FilePath, "file_size": m.Size, "supported": false,
-			"created_at": m.CreatedAt.Format(forgeTime), "deleted_at": nil,
-		})
-	}
-	obj["current_release"] = releaseObject(metas[0])
-	obj["releases"] = releases
-	obj["downloads"] = 0
-	obj["created_at"] = metas[len(metas)-1].CreatedAt.Format(forgeTime)
-	obj["updated_at"] = metas[0].CreatedAt.Format(forgeTime)
-	return obj
-}
-
-func writeJSON(w http.ResponseWriter, v any) {
-	w.Header().Set("Content-Type", "application/json")
-	w.WriteHeader(http.StatusOK)
-	enc := json.NewEncoder(w)
-	enc.SetEscapeHTML(false)
-	_ = enc.Encode(v)
-}
-
-func notFound(w http.ResponseWriter) {
-	w.Header().Set("Content-Type", "application/json")
-	w.WriteHeader(http.StatusNotFound)
-	_, _ = io.WriteString(w, `{"message":"404 Not Found","errors":["The requested resource could not be found"]}`)
-}
-
-// sortReleases orders by module slug, then newest semver first.
-func sortReleases(metas []provider.PuppetMetadata) {
-	slices.SortStableFunc(metas, func(a, b provider.PuppetMetadata) int {
-		if c := strings.Compare(a.Slug, b.Slug); c != 0 {
-			return c
-		}
-		return compareSemver(b.Version, a.Version)
-	})
-}
-
-func compareSemver(a, b string) int {
-	a, _, _ = strings.Cut(a, "+")
-	b, _, _ = strings.Cut(b, "+")
-	aCore, aPre, aHasPre := strings.Cut(a, "-")
-	bCore, bPre, bHasPre := strings.Cut(b, "-")
-	if c := compareIdents(strings.Split(aCore, "."), strings.Split(bCore, ".")); c != 0 {
-		return c
-	}
-	switch {
-	case aHasPre && !bHasPre:
-		return -1
-	case !aHasPre && bHasPre:
-		return 1
-	}
-	return compareIdents(strings.Split(aPre, "."), strings.Split(bPre, "."))
-}
-
-func compareIdents(a, b []string) int {
-	for i := 0; i < len(a) && i < len(b); i++ {
-		an, aErr := strconv.Atoi(a[i])
-		bn, bErr := strconv.Atoi(b[i])
-		var c int
-		switch {
-		case aErr == nil && bErr == nil:
-			c = an - bn
-		case aErr == nil:
-			c = -1
-		case bErr == nil:
-			c = 1
-		default:
-			c = strings.Compare(a[i], b[i])
-		}
-		if c != 0 {
-			return c
-		}
-	}
-	return len(a) - len(b)
-}

internal/provider/puppet/local_test.go

@@ -1,301 +0,0 @@
-package puppet
-
-import (
-	"archive/tar"
-	"bytes"
-	"compress/gzip"
-	"context"
-	"crypto/md5"
-	"encoding/hex"
-	"encoding/json"
-	"io"
-	"net/http"
-	"net/http/httptest"
-	"strings"
-	"testing"
-	"time"
-
-	"git.unkin.net/unkin/artifactapi/internal/provider"
-)
-
-func moduleTarball(t *testing.T, dir, metadata string) []byte {
-	t.Helper()
-	var buf bytes.Buffer
-	zw := gzip.NewWriter(&buf)
-	tw := tar.NewWriter(zw)
-	for name, body := range map[string]string{dir + "/metadata.json": metadata, dir + "/manifests/init.pp": "class hello {}\n"} {
-		if err := tw.WriteHeader(&tar.Header{Name: name, Mode: 0o644, Size: int64(len(body))}); err != nil {
-			t.Fatal(err)
-		}
-		_, _ = tw.Write([]byte(body))
-	}
-	_ = tw.Close()
-	_ = zw.Close()
-	return buf.Bytes()
-}
-
-const helloMetadata = `{"name":"unkin-hello","version":"0.1.0","dependencies":[{"name":"puppetlabs/stdlib","version_requirement":">= 4.0.0"}]}`
-
-type fakeBlobs struct{ data []byte }
-
-func (f fakeBlobs) Download(context.Context, string) (io.ReadCloser, int64, error) {
-	return io.NopCloser(bytes.NewReader(f.data)), int64(len(f.data)), nil
-}
-
-type fakeStore struct{ inserted *provider.PuppetMetadata }
-
-func (f *fakeStore) InsertRPMMetadata(context.Context, *provider.RPMMetadata) error { return nil }
-func (f *fakeStore) InsertDebMetadata(context.Context, *provider.DebMetadata) error { return nil }
-func (f *fakeStore) InsertPuppetMetadata(_ context.Context, m *provider.PuppetMetadata) error {
-	f.inserted = m
-	return nil
-}
-
-type fakeReader struct{ metas []provider.PuppetMetadata }
-
-func (f fakeReader) ListPuppetMetadataEntries(_ context.Context, _, slug string) ([]provider.PuppetMetadata, error) {
-	var out []provider.PuppetMetadata
-	for _, m := range f.metas {
-		if slug == "" || m.Slug == slug {
-			out = append(out, m)
-		}
-	}
-	return out, nil
-}
-func (fakeReader) ListFilesByPrefix(context.Context, string, string) ([]provider.FileEntry, error) {
-	return nil, nil
-}
-func (fakeReader) ListPackages(context.Context, string) ([]string, error) { return nil, nil }
-
-func TestValidateUpload(t *testing.T) {
-	p := &Provider{}
-	sp, ct, err := p.ValidateUpload("some/dir/Unkin-hello-0.1.0.tar.gz")
-	if err != nil || sp != "v3/files/unkin-hello-0.1.0.tar.gz" || ct != "application/gzip" {
-		t.Errorf("sp=%q ct=%q err=%v", sp, ct, err)
-	}
-	for _, bad := range []string{"hello-0.1.0.tar.gz", "unkin-hello-0.1.tar.gz", "unkin-hello-0.1.0.zip", "unkin-Hello_x-0.1.0.tgz"} {
-		if _, _, err := p.ValidateUpload(bad); err == nil {
-			t.Errorf("%q accepted", bad)
-		}
-	}
-}
-
-func TestAfterUploadRecordsMetadata(t *testing.T) {
-	raw := moduleTarball(t, "unkin-hello-0.1.0", helloMetadata)
-	store := &fakeStore{}
-	(&Provider{}).AfterUpload(context.Background(), "forge", "v3/files/unkin-hello-0.1.0.tar.gz", "sha256:abc", fakeBlobs{raw}, store)
-	m := store.inserted
-	if m == nil {
-		t.Fatal("nothing inserted")
-	}
-	sum := md5.Sum(raw)
-	if m.Slug != "unkin-hello" || m.Version != "0.1.0" || m.MD5 != hex.EncodeToString(sum[:]) || m.Size != int64(len(raw)) || m.MetadataJSON != helloMetadata {
-		t.Errorf("got %+v", m)
-	}
-}
-
-func TestAfterUploadRejectsMismatchedFilename(t *testing.T) {
-	raw := moduleTarball(t, "unkin-hello-0.2.0", `{"name":"unkin-hello","version":"0.2.0"}`)
-	store := &fakeStore{}
-	(&Provider{}).AfterUpload(context.Background(), "forge", "v3/files/unkin-hello-0.1.0.tar.gz", "sha256:abc", fakeBlobs{raw}, store)
-	if store.inserted != nil {
-		t.Error("mismatched version indexed")
-	}
-}
-
-func TestParseModuleRequiresTopLevelMetadata(t *testing.T) {
-	if _, err := parseModule(bytes.NewReader(moduleTarball(t, "a/b", helloMetadata))); err == nil {
-		t.Error("nested metadata.json accepted")
-	}
-	if _, err := parseModule(bytes.NewReader(moduleTarball(t, "x", `{"name":"unkin-hello"}`))); err == nil {
-		t.Error("missing version accepted")
-	}
-}
-
-func tarballOf(t *testing.T, entries ...*tar.Header) []byte {
-	t.Helper()
-	var buf bytes.Buffer
-	zw := gzip.NewWriter(&buf)
-	tw := tar.NewWriter(zw)
-	for _, h := range entries {
-		if err := tw.WriteHeader(h); err != nil {
-			t.Fatal(err)
-		}
-		if h.Typeflag == tar.TypeReg {
-			body := helloMetadata
-			if !strings.HasSuffix(h.Name, "metadata.json") {
-				body = strings.Repeat("x", int(h.Size))
-			}
-			_, _ = tw.Write([]byte(body))
-		}
-	}
-	_ = tw.Close()
-	_ = zw.Close()
-	return buf.Bytes()
-}
-
-func TestParseModuleSkipsNonRegularMetadata(t *testing.T) {
-	raw := tarballOf(t,
-		&tar.Header{Name: "unkin-hello-0.1.0/metadata.json", Typeflag: tar.TypeSymlink, Linkname: "/etc/passwd"},
-		&tar.Header{Name: "unkin-hello-0.1.0/metadata.json/", Typeflag: tar.TypeDir, Mode: 0o755},
-		&tar.Header{Name: "unkin-hello-0.1.0/metadata.json", Typeflag: tar.TypeReg, Mode: 0o644, Size: int64(len(helloMetadata))},
-	)
-	meta, err := parseModule(bytes.NewReader(raw))
-	if err != nil || meta.Slug != "unkin-hello" || meta.Version != "0.1.0" {
-		t.Fatalf("got %v, %v", meta, err)
-	}
-}
-
-func TestParseModuleCapsDecompressedScan(t *testing.T) {
-	defer func(n int64) { maxModuleScan = n }(maxModuleScan)
-	maxModuleScan = 64 << 10
-	raw := tarballOf(t,
-		&tar.Header{Name: "unkin-hello-0.1.0/big", Typeflag: tar.TypeReg, Mode: 0o644, Size: 1 << 20},
-		&tar.Header{Name: "unkin-hello-0.1.0/metadata.json", Typeflag: tar.TypeReg, Mode: 0o644, Size: int64(len(helloMetadata))},
-	)
-	if _, err := parseModule(bytes.NewReader(raw)); err == nil || !strings.Contains(err.Error(), "scan limit") {
-		t.Fatalf("expected scan limit error, got %v", err)
-	}
-	maxModuleScan = 2 << 20
-	if _, err := parseModule(bytes.NewReader(raw)); err != nil {
-		t.Fatalf("under cap: %v", err)
-	}
-}
-
-func TestAfterUploadCapsTarballSize(t *testing.T) {
-	defer func(n int64) { maxModuleTarball = n }(maxModuleTarball)
-	raw := moduleTarball(t, "unkin-hello-0.1.0", helloMetadata)
-	maxModuleTarball = int64(len(raw)) - 1
-	store := &fakeStore{}
-	(&Provider{}).AfterUpload(context.Background(), "forge", "v3/files/unkin-hello-0.1.0.tar.gz", "sha256:abc", fakeBlobs{raw}, store)
-	if store.inserted != nil {
-		t.Error("oversized tarball indexed")
-	}
-	maxModuleTarball = int64(len(raw))
-	(&Provider{}).AfterUpload(context.Background(), "forge", "v3/files/unkin-hello-0.1.0.tar.gz", "sha256:abc", fakeBlobs{raw}, store)
-	if store.inserted == nil {
-		t.Error("tarball at cap not indexed")
-	}
-}
-
-func TestReleaseListClampsPagination(t *testing.T) {
-	files := releases("0.1.0", "0.2.0", "0.3.0")
-	for _, q := range []string{"offset=9223372036854775807", "offset=9223372036854775807&limit=9223372036854775807", "offset=-5&limit=-5", "limit=9223372036854775807"} {
-		code, body := get(t, files, "v3/releases?module=unkin-hello&"+q)
-		if code != http.StatusOK {
-			t.Fatalf("%s: code %d", q, code)
-		}
-		pg := body["pagination"].(map[string]any)
-		if l := pg["limit"].(float64); l < 1 || l > 100 {
-			t.Errorf("%s: limit %v", q, l)
-		}
-		if o := pg["offset"].(float64); o < 0 || o > 3 {
-			t.Errorf("%s: offset %v", q, o)
-		}
-	}
-	_, body := get(t, files, "v3/releases?module=unkin-hello&offset=9223372036854775807")
-	if len(body["results"].([]any)) != 0 || body["pagination"].(map[string]any)["next"] != nil {
-		t.Errorf("past-end page: %v", body)
-	}
-}
-
-func get(t *testing.T, files provider.FileStore, target string) (int, map[string]any) {
-	t.Helper()
-	rec := httptest.NewRecorder()
-	req := httptest.NewRequest(http.MethodGet, "/x/"+target, nil)
-	path, _, _ := strings.Cut(target, "?")
-	if !(&Provider{}).ServeLocalIndex(rec, req, files, "forge", path) {
-		return 0, nil
-	}
-	var body map[string]any
-	_ = json.Unmarshal(rec.Body.Bytes(), &body)
-	return rec.Code, body
-}
-
-func releases(versions ...string) fakeReader {
-	var f fakeReader
-	for i, v := range versions {
-		f.metas = append(f.metas, provider.PuppetMetadata{
-			FilePath: "v3/files/unkin-hello-" + v + ".tar.gz", ContentHash: "sha256:feed", Slug: "unkin-hello",
-			Version: v, MetadataJSON: `{"name":"unkin-hello","version":"` + v + `"}`, MD5: "m" + v,
-			CreatedAt: time.Unix(int64(i), 0),
-		})
-	}
-	f.metas = append(f.metas, provider.PuppetMetadata{Slug: "other-mod", Version: "9.9.9", MetadataJSON: `{}`})
-	return f
-}
-
-func TestReleaseListPaginatesNewestFirst(t *testing.T) {
-	files := releases("0.1.0", "0.10.0", "0.2.0", "1.0.0-rc.1", "1.0.0")
-	code, body := get(t, files, "v3/releases?module=unkin/hello&limit=2")
-	if code != http.StatusOK {
-		t.Fatalf("code %d", code)
-	}
-	results := body["results"].([]any)
-	pg := body["pagination"].(map[string]any)
-	if len(results) != 2 || results[0].(map[string]any)["version"] != "1.0.0" || results[1].(map[string]any)["version"] != "1.0.0-rc.1" {
-		t.Fatalf("page 1: %v", results)
-	}
-	if pg["total"] != float64(5) || pg["next"] != "/v3/releases?limit=2&module=unkin-hello&offset=2" || pg["previous"] != nil {
-		t.Errorf("pagination: %v", pg)
-	}
-
-	_, body = get(t, files, "v3/releases?module=unkin-hello&limit=2&offset=4")
-	results = body["results"].([]any)
-	pg = body["pagination"].(map[string]any)
-	if len(results) != 1 || results[0].(map[string]any)["version"] != "0.1.0" || pg["next"] != nil || pg["previous"] != "/v3/releases?limit=2&module=unkin-hello&offset=2" {
-		t.Errorf("last page: %v %v", results, pg)
-	}
-
-	_, body = get(t, files, "v3/releases?module=nobody-none")
-	if len(body["results"].([]any)) != 0 {
-		t.Error("unknown module returned results")
-	}
-}
-
-func TestReleaseObject(t *testing.T) {
-	code, body := get(t, releases("0.1.0"), "v3/releases/unkin-hello-0.1.0")
-	if code != http.StatusOK {
-		t.Fatalf("code %d", code)
-	}
-	if body["file_uri"] != "/v3/files/unkin-hello-0.1.0.tar.gz" || body["file_md5"] != "m0.1.0" || body["file_sha256"] != "feed" {
-		t.Errorf("release: %v", body)
-	}
-	if body["metadata"].(map[string]any)["name"] != "unkin-hello" || body["module"].(map[string]any)["owner"].(map[string]any)["username"] != "unkin" {
-		t.Errorf("release refs: %v", body)
-	}
-	if code, _ := get(t, releases("0.1.0"), "v3/releases/unkin-hello-0.2.0"); code != http.StatusNotFound {
-		t.Errorf("missing version: %d", code)
-	}
-}
-
-func TestModuleObject(t *testing.T) {
-	code, body := get(t, releases("0.9.0", "0.10.0"), "v3/modules/unkin-hello")
-	if code != http.StatusOK {
-		t.Fatalf("code %d", code)
-	}
-	if body["slug"] != "unkin-hello" || body["name"] != "hello" || body["current_release"].(map[string]any)["version"] != "0.10.0" || len(body["releases"].([]any)) != 2 {
-		t.Errorf("module: %v", body)
-	}
-	if code, _ := get(t, releases(), "v3/modules/unkin-missing"); code != http.StatusNotFound {
-		t.Errorf("missing module: %d", code)
-	}
-}
-
-func TestFilesFallThrough(t *testing.T) {
-	if code, _ := get(t, releases(), "v3/files/unkin-hello-0.1.0.tar.gz"); code != 0 {
-		t.Error("file downloads must fall through to the stored file")
-	}
-}
-
-func TestCompareSemver(t *testing.T) {
-	ordered := []string{"0.1.0", "0.2.0", "0.10.0", "1.0.0-alpha", "1.0.0-alpha.1", "1.0.0-beta", "1.0.0-beta.2", "1.0.0-beta.11", "1.0.0", "1.0.1+build"}
-	for i := 1; i < len(ordered); i++ {
-		if compareSemver(ordered[i-1], ordered[i]) >= 0 || compareSemver(ordered[i], ordered[i-1]) <= 0 {
-			t.Errorf("%s should sort before %s", ordered[i-1], ordered[i])
-		}
-	}
-	if compareSemver("1.0.0+a", "1.0.0+b") != 0 {
-		t.Error("build metadata must not affect precedence")
-	}
-}

internal/provider/puppet/puppet.go

@@ -39,8 +39,6 @@ func (p *Provider) UpstreamURL(remote models.Remote, path string) string {
 	return strings.TrimRight(remote.BaseURL, "/") + "/" + strings.TrimLeft(path, "/")
 }
 
-func (p *Provider) RewritesResponse() {}
-
 func (p *Provider) RewriteResponse(body []byte, remote models.Remote, proxyBaseURL string) ([]byte, error) {
 	if proxyBaseURL == "" {
 		return nil, nil

internal/provider/pypi/pypi.go

@@ -52,8 +52,6 @@ func (p *Provider) UpstreamURL(remote models.Remote, path string) string {
 	return strings.TrimRight(remote.BaseURL, "/") + "/" + strings.TrimLeft(path, "/")
 }
 
-func (p *Provider) RewritesResponse() {}
-
 func (p *Provider) RewriteResponse(body []byte, remote models.Remote, proxyBaseURL string) ([]byte, error) {
 	if proxyBaseURL == "" {
 		return nil, nil

internal/provider/terraform/terraform.go

@@ -73,8 +73,6 @@ func (p *Provider) UpstreamURL(remote models.Remote, path string) string {
 	return strings.TrimRight(remote.BaseURL, "/") + "/v1/providers/" + strings.TrimLeft(path, "/")
 }
 
-func (p *Provider) RewritesResponse() {}
-
 func (p *Provider) RewriteResponse(body []byte, remote models.Remote, proxyBaseURL string) ([]byte, error) {
 	if remote.ReleasesRemote == "" {
 		return nil, nil

internal/provider/yamlalias.go

@@ -1,46 +0,0 @@
-package provider
-
-import (
-	"errors"
-
-	"gopkg.in/yaml.v3"
-)
-
-const MaxAliasExpandedNodes = 100000
-
-// ExpandYAMLAliases inlines alias targets and drops anchors so a node map
-// stays valid when copied away from the document that held its anchors;
-// budget caps nodes reached through aliases against alias bombs.
-func ExpandYAMLAliases(m map[string]yaml.Node, budget *int) (map[string]yaml.Node, error) {
-	var expand func(n *yaml.Node, viaAlias bool) (*yaml.Node, error)
-	expand = func(n *yaml.Node, viaAlias bool) (*yaml.Node, error) {
-		if viaAlias {
-			*budget--
-			if *budget < 0 {
-				return nil, errors.New("yaml aliases expand to too many nodes")
-			}
-		}
-		if n.Kind == yaml.AliasNode {
-			return expand(n.Alias, true)
-		}
-		c := *n
-		c.Anchor = ""
-		c.Content = make([]*yaml.Node, len(n.Content))
-		for i, ch := range n.Content {
-			var err error
-			if c.Content[i], err = expand(ch, viaAlias); err != nil {
-				return nil, err
-			}
-		}
-		return &c, nil
-	}
-	out := make(map[string]yaml.Node, len(m))
-	for k, v := range m {
-		e, err := expand(&v, false)
-		if err != nil {
-			return nil, err
-		}
-		out[k] = *e
-	}
-	return out, nil
-}

internal/proxy/engine.go

@@ -353,7 +353,7 @@ func (e *Engine) headUpstreamOnce(ctx context.Context, remote models.Remote, pat
 				req.Header.Set(k, v)
 			}
 		}
-		return clientForRemote(remote).Do(req)
+		return http.DefaultClient.Do(req)
 	}
 
 	resp, err := doHead(nil)

internal/proxy/engine_test.go

@@ -216,20 +216,6 @@ func TestHead(t *testing.T) {
 	}
 }
 
-func TestHeadUpstreamUsesRemoteTimeout(t *testing.T) {
-	slow := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
-		time.Sleep(3 * time.Second)
-	}))
-	defer slow.Close()
-	r := models.Remote{Name: "slow-head", PackageType: models.PackageGeneric, BaseURL: slow.URL, UpstreamResponseHeaderTimeout: 1}
-
-	start := time.Now()
-	_, err := (&Engine{}).headUpstreamOnce(context.Background(), r, "blob.bin", prov(t, models.PackageGeneric))
-	if err == nil || time.Since(start) > 2*time.Second {
-		t.Fatalf("HEAD ignored the remote's response header timeout: err=%v after %s", err, time.Since(start))
-	}
-}
-
 func TestStaleOnError(t *testing.T) {
 	requireStack(t)
 	ctx := context.Background()

internal/server/server.go

@@ -21,10 +21,19 @@ import (
 	"git.unkin.net/unkin/artifactapi/internal/database"
 	"git.unkin.net/unkin/artifactapi/internal/gc"
 	"git.unkin.net/unkin/artifactapi/internal/githubauth"
-	_ "git.unkin.net/unkin/artifactapi/internal/provider/all"
 	"git.unkin.net/unkin/artifactapi/internal/provider/alpine"
+	_ "git.unkin.net/unkin/artifactapi/internal/provider/cargo"
 	"git.unkin.net/unkin/artifactapi/internal/provider/deb"
+	_ "git.unkin.net/unkin/artifactapi/internal/provider/docker"
+	_ "git.unkin.net/unkin/artifactapi/internal/provider/generic"
+	_ "git.unkin.net/unkin/artifactapi/internal/provider/goproxy"
+	_ "git.unkin.net/unkin/artifactapi/internal/provider/helm"
+	_ "git.unkin.net/unkin/artifactapi/internal/provider/npm"
+	_ "git.unkin.net/unkin/artifactapi/internal/provider/nuget"
+	_ "git.unkin.net/unkin/artifactapi/internal/provider/puppet"
+	_ "git.unkin.net/unkin/artifactapi/internal/provider/pypi"
 	"git.unkin.net/unkin/artifactapi/internal/provider/rpm"
+	_ "git.unkin.net/unkin/artifactapi/internal/provider/terraform"
 	"git.unkin.net/unkin/artifactapi/internal/proxy"
 	"git.unkin.net/unkin/artifactapi/internal/storage"
 	"git.unkin.net/unkin/artifactapi/internal/tfsign"

internal/virtual/deb_merger.go

@@ -0,0 +1,245 @@
+package virtual
+
+import (
+	"bytes"
+	"crypto/md5"
+	"encoding/hex"
+	"fmt"
+	"path"
+	"regexp"
+	"slices"
+	"strings"
+	"time"
+)
+
+// debIndexRe matches the binary Packages indexes a virtual merges: the flat
+// repo's root Packages and a suite's <component>/binary-<arch>/Packages.
+var debIndexRe = regexp.MustCompile(`^([^/]+/binary-[^/]+/)?Packages(\.[a-z0-9]+)?$`)
+
+// debByHashRe matches an index requested by its SHA256 (Acquire-By-Hash).
+var debByHashRe = regexp.MustCompile(`^([^/]+/binary-[^/]+/)?by-hash/SHA256/[0-9a-f]{64}$`)
+
+// debCompressions is the order a member's index variants are fetched in.
+var debCompressions = []string{".xz", ".gz", ".zst", ".bz2", ""}
+
+// DebMember is one member's Release plus its decompressed Packages indexes,
+// keyed by index directory relative to the Release ("" for a flat repo).
+type DebMember struct {
+	RemoteName string
+	Release    []byte
+	Packages   map[string][]byte
+}
+
+// DebRepo is a merged apt repo: Release plus the indexes it lists, keyed by
+// their path relative to the Release.
+type DebRepo struct {
+	Release []byte
+	Files   map[string][]byte
+}
+
+type debRelease struct {
+	fields map[string]string
+	files  []string
+}
+
+// parseDebRelease reads a Release file's single-line fields and the names
+// listed in its checksum sections.
+func parseDebRelease(body []byte) debRelease {
+	rel := debRelease{fields: map[string]string{}}
+	inSums := false
+	seen := map[string]bool{}
+	for line := range strings.SplitSeq(string(body), "\n") {
+		line = strings.TrimRight(line, "\r")
+		if line == "" {
+			continue
+		}
+		if line[0] == ' ' || line[0] == '\t' {
+			if f := strings.Fields(line); inSums && len(f) == 3 && !seen[f[2]] {
+				seen[f[2]] = true
+				rel.files = append(rel.files, f[2])
+			}
+			continue
+		}
+		k, v, _ := strings.Cut(line, ":")
+		v = strings.TrimSpace(v)
+		inSums = v == "" && (k == "MD5Sum" || strings.HasPrefix(k, "SHA"))
+		if _, ok := rel.fields[k]; !ok {
+			rel.fields[k] = v
+		}
+	}
+	return rel
+}
+
+// debIndexFiles returns, per index directory, the variant of its Packages file
+// to fetch from a member's Release listing.
+func debIndexFiles(rel debRelease) map[string]string {
+	listed := map[string]bool{}
+	for _, f := range rel.files {
+		listed[f] = true
+	}
+	out := map[string]string{}
+	for _, f := range rel.files {
+		m := debIndexRe.FindStringSubmatch(f)
+		if m == nil || out[m[1]] != "" {
+			continue
+		}
+		for _, c := range debCompressions {
+			if listed[m[1]+"Packages"+c] {
+				out[m[1]] = m[1] + "Packages" + c
+				break
+			}
+		}
+	}
+	return out
+}
+
+func splitStanzas(body []byte) []string {
+	var out []string
+	for s := range strings.SplitSeq(strings.ReplaceAll(string(body), "\r\n", "\n"), "\n\n") {
+		if s = strings.Trim(s, "\n"); s != "" {
+			out = append(out, s)
+		}
+	}
+	return out
+}
+
+func stanzaField(stanza, key string) string {
+	for line := range strings.SplitSeq(stanza, "\n") {
+		if k, v, ok := strings.Cut(line, ":"); ok && k == key {
+			return strings.TrimSpace(v)
+		}
+	}
+	return ""
+}
+
+func unionFields(dst []string, field string) []string {
+	for f := range strings.FieldsSeq(field) {
+		if !slices.Contains(dst, f) {
+			dst = append(dst, f)
+		}
+	}
+	return dst
+}
+
+func parseDebDate(s string) (time.Time, bool) {
+	for _, layout := range []string{time.RFC1123Z, time.RFC1123} {
+		if t, err := time.Parse(layout, s); err == nil {
+			return t, true
+		}
+	}
+	return time.Time{}, false
+}
+
+// MergeDeb merges members into one apt repo. Members are in priority order: the
+// first member to carry a (Package, Version, Architecture) in an index wins;
+// stanzas missing any of those are always kept. Filename is prefixed with the
+// owning member's name so the virtual can route downloads back to it.
+func MergeDeb(members []DebMember) *DebRepo {
+	var suite, codename string
+	var arches, comps, dirs []string
+	date := time.Unix(0, 0)
+	for _, m := range members {
+		rel := parseDebRelease(m.Release)
+		if suite == "" {
+			suite, codename = rel.fields["Suite"], rel.fields["Codename"]
+		}
+		arches = unionFields(arches, rel.fields["Architectures"])
+		comps = unionFields(comps, rel.fields["Components"])
+		if t, ok := parseDebDate(rel.fields["Date"]); ok && t.After(date) {
+			date = t
+		}
+		for d := range m.Packages {
+			if !slices.Contains(dirs, d) {
+				dirs = append(dirs, d)
+			}
+		}
+	}
+	slices.Sort(dirs)
+
+	repo := &DebRepo{Files: map[string][]byte{}}
+	for _, d := range dirs {
+		seen := map[string]bool{}
+		var b bytes.Buffer
+		for _, m := range members {
+			for _, s := range splitStanzas(m.Packages[d]) {
+				pkg, ver, arch := stanzaField(s, "Package"), stanzaField(s, "Version"), stanzaField(s, "Architecture")
+				if pkg != "" && ver != "" && arch != "" {
+					key := pkg + "\x00" + ver + "\x00" + arch
+					if seen[key] {
+						continue
+					}
+					seen[key] = true
+				}
+				if fn := stanzaField(s, "Filename"); fn != "" {
+					s = rewriteFilename(s, m.RemoteName+"/"+strings.TrimPrefix(path.Clean("/"+fn), "/"))
+				}
+				b.WriteString(s)
+				b.WriteString("\n\n")
+			}
+		}
+		gz := gzipDeterministic(b.Bytes())
+		repo.Files[d+"Packages"] = b.Bytes()
+		repo.Files[d+"Packages.gz"] = gz
+		repo.Files[d+"by-hash/SHA256/"+sha256Hex(b.Bytes())] = b.Bytes()
+		repo.Files[d+"by-hash/SHA256/"+sha256Hex(gz)] = gz
+	}
+
+	var r bytes.Buffer
+	if suite != "" {
+		fmt.Fprintf(&r, "Suite: %s\n", suite)
+	}
+	if codename != "" {
+		fmt.Fprintf(&r, "Codename: %s\n", codename)
+	}
+	fmt.Fprintf(&r, "Date: %s\n", date.UTC().Format(time.RFC1123Z))
+	fmt.Fprintf(&r, "Architectures: %s\n", strings.Join(arches, " "))
+	if len(comps) > 0 {
+		fmt.Fprintf(&r, "Components: %s\n", strings.Join(comps, " "))
+	}
+	r.WriteString("Acquire-By-Hash: yes\n")
+	for _, sec := range []struct {
+		name string
+		sum  func([]byte) string
+	}{{"MD5Sum", md5Hex}, {"SHA256", sha256Hex}} {
+		r.WriteString(sec.name + ":\n")
+		for _, d := range dirs {
+			for _, n := range []string{d + "Packages", d + "Packages.gz"} {
+				fmt.Fprintf(&r, " %s %d %s\n", sec.sum(repo.Files[n]), len(repo.Files[n]), n)
+			}
+		}
+	}
+	repo.Release = r.Bytes()
+	return repo
+}
+
+func rewriteFilename(stanza, fn string) string {
+	lines := strings.Split(stanza, "\n")
+	for i, l := range lines {
+		if strings.HasPrefix(l, "Filename:") {
+			lines[i] = "Filename: " + fn
+			break
+		}
+	}
+	return strings.Join(lines, "\n")
+}
+
+// debIndexPath splits an index request into its Release directory and the file
+// under it. ok is false for anything a deb virtual does not merge.
+func debIndexPath(p string) (base, name string, ok bool) {
+	if rest, found := strings.CutPrefix(p, "dists/"); found {
+		suite, n, found := strings.Cut(rest, "/")
+		if !found || suite == "" {
+			return "", "", false
+		}
+		base, p = "dists/"+suite+"/", n
+	}
+	if p != "Release" && !debIndexRe.MatchString(p) && !debByHashRe.MatchString(p) {
+		return "", "", false
+	}
+	return base, p, true
+}
+
+func md5Hex(data []byte) string {
+	h := md5.Sum(data)
+	return hex.EncodeToString(h[:])
+}

internal/virtual/deb_merger_test.go

@@ -0,0 +1,179 @@
+package virtual
+
+import (
+	"bytes"
+	"crypto/md5"
+	"encoding/hex"
+	"fmt"
+	"maps"
+	"path"
+	"slices"
+	"strings"
+	"testing"
+)
+
+func debStanza(pkg, ver, arch, filename string) string {
+	return fmt.Sprintf("Package: %s\nVersion: %s\nArchitecture: %s\nDescription: test\n multi-line body\nFilename: %s\nSize: 1\n", pkg, ver, arch, filename)
+}
+
+func flatDebMember(name, date string, stanzas ...string) DebMember {
+	rel := "Date: " + date + "\nArchitectures: amd64\nAcquire-By-Hash: no\nSHA256:\n x 1 Packages\n x 1 Packages.gz\n"
+	return DebMember{RemoteName: name, Release: []byte(rel), Packages: map[string][]byte{"": []byte(strings.Join(stanzas, "\n"))}}
+}
+
+func TestMergeDebDedupesByMemberOrder(t *testing.T) {
+	repo := MergeDeb([]DebMember{
+		flatDebMember("a", "Mon, 05 Oct 2026 10:00:00 +0000",
+			debStanza("foo", "1.0", "amd64", "pool/foo_1.0_amd64.deb"),
+			debStanza("bar", "2.0", "amd64", "/pool/bar.deb"),
+			debStanza("dot", "1.0", "amd64", "./dot.deb"),
+			"Package: noversion\nFilename: nv1.deb\n",
+			"Package: noversion\nFilename: nv2.deb\n"),
+		flatDebMember("b", "Tue, 06 Oct 2026 10:00:00 UTC",
+			debStanza("foo", "1.0", "amd64", "pool/foo-from-b.deb"),
+			debStanza("foo", "1.0", "arm64", "pool/foo_arm64.deb"),
+			debStanza("foo", "1.1", "amd64", "o/r/releases/download/v1/foo.deb")),
+	})
+	pk := string(repo.Files["Packages"])
+	stanzas := splitStanzas(repo.Files["Packages"])
+	if len(stanzas) != 7 {
+		t.Fatalf("want 7 stanzas (one duplicate dropped), got %d:\n%s", len(stanzas), pk)
+	}
+	for _, want := range []string{
+		"Filename: a/pool/foo_1.0_amd64.deb",
+		"Filename: a/pool/bar.deb",
+		"Filename: a/dot.deb",
+		"Filename: a/nv1.deb",
+		"Filename: a/nv2.deb",
+		"Filename: b/pool/foo_arm64.deb",
+		"Filename: b/o/r/releases/download/v1/foo.deb",
+		" multi-line body",
+	} {
+		if !strings.Contains(pk, want) {
+			t.Errorf("merged Packages missing %q:\n%s", want, pk)
+		}
+	}
+	if strings.Contains(pk, "foo-from-b") {
+		t.Fatalf("second member's duplicate must lose:\n%s", pk)
+	}
+	if !bytes.Equal(gunzip(t, repo.Files["Packages.gz"]), repo.Files["Packages"]) {
+		t.Fatal("Packages.gz does not match Packages")
+	}
+	if !strings.Contains(string(repo.Release), "Date: Tue, 06 Oct 2026 10:00:00 +0000\n") {
+		t.Fatalf("Date should be the newest member date:\n%s", repo.Release)
+	}
+}
+
+func TestMergeDebReleaseHashesFiles(t *testing.T) {
+	repo := MergeDeb([]DebMember{flatDebMember("a", "", debStanza("foo", "1", "amd64", "pool/foo.deb"))})
+	rel := parseDebRelease(repo.Release)
+	if got := slices.Sorted(slices.Values(rel.files)); !slices.Equal(got, []string{"Packages", "Packages.gz"}) {
+		t.Fatalf("Release lists %v", got)
+	}
+	inSHA := false
+	checked := 0
+	for line := range strings.SplitSeq(string(repo.Release), "\n") {
+		if !strings.HasPrefix(line, " ") {
+			inSHA = line == "SHA256:"
+			continue
+		}
+		var sum, name string
+		var size int
+		if _, err := fmt.Sscan(line, &sum, &size, &name); err != nil {
+			t.Fatal(err)
+		}
+		body := repo.Files[name]
+		want := sha256Hex(body)
+		if !inSHA {
+			h := md5.Sum(body)
+			want = hex.EncodeToString(h[:])
+		}
+		if sum != want || size != len(body) {
+			t.Errorf("%s: Release has %s %d, file is %s %d", name, sum, size, want, len(body))
+		}
+		checked++
+	}
+	if checked != 4 {
+		t.Fatalf("checked %d Release entries, want 4:\n%s", checked, repo.Release)
+	}
+	if !bytes.Equal(MergeDeb([]DebMember{flatDebMember("a", "", debStanza("foo", "1", "amd64", "pool/foo.deb"))}).Release, repo.Release) {
+		t.Fatal("merge must be deterministic")
+	}
+}
+
+func TestMergeDebSuiteLayout(t *testing.T) {
+	rel := func(comps string) []byte {
+		return []byte("Suite: stable\nCodename: trixie\nArchitectures: amd64 arm64\nComponents: " + comps + "\nSHA256:\n x 1 main/binary-amd64/Packages.xz\n")
+	}
+	repo := MergeDeb([]DebMember{
+		{RemoteName: "deb1", Release: rel("main"), Packages: map[string][]byte{"main/binary-amd64/": []byte(debStanza("foo", "1", "amd64", "pool/main/f/foo.deb"))}},
+		{RemoteName: "deb2", Release: rel("main contrib"), Packages: map[string][]byte{
+			"main/binary-amd64/":    []byte(debStanza("bar", "1", "amd64", "pool/main/b/bar.deb")),
+			"contrib/binary-amd64/": []byte(debStanza("baz", "1", "amd64", "pool/contrib/b/baz.deb")),
+		}},
+	})
+	for _, want := range []string{"Suite: stable\n", "Codename: trixie\n", "Components: main contrib\n", "Architectures: amd64 arm64\n"} {
+		if !strings.Contains(string(repo.Release), want) {
+			t.Errorf("Release missing %q:\n%s", want, repo.Release)
+		}
+	}
+	want := []string{"contrib/binary-amd64/Packages", "contrib/binary-amd64/Packages.gz", "main/binary-amd64/Packages", "main/binary-amd64/Packages.gz"}
+	if got := slices.Sorted(slices.Values(parseDebRelease(repo.Release).files)); !slices.Equal(got, want) {
+		t.Fatalf("Release lists %v, want %v", got, want)
+	}
+	if !strings.Contains(string(repo.Release), "Acquire-By-Hash: yes\n") {
+		t.Fatalf("Release must advertise by-hash:\n%s", repo.Release)
+	}
+	for _, n := range want {
+		byHash := path.Dir(n) + "/by-hash/SHA256/" + sha256Hex(repo.Files[n])
+		if !bytes.Equal(repo.Files[byHash], repo.Files[n]) {
+			t.Errorf("%s not served at %s", n, byHash)
+		}
+	}
+	if len(repo.Files) != 2*len(want) {
+		t.Fatalf("files %v, want each index plus its by-hash copy", slices.Sorted(maps.Keys(repo.Files)))
+	}
+	if n := len(splitStanzas(repo.Files["main/binary-amd64/Packages"])); n != 2 {
+		t.Fatalf("main/binary-amd64 should merge both members, got %d stanzas", n)
+	}
+}
+
+func TestDebIndexFiles(t *testing.T) {
+	rel := parseDebRelease([]byte("Origin: Debian\nMD5Sum:\n a 1 main/binary-amd64/Packages\n a 1 main/binary-amd64/Packages.gz\nSHA256:\n" +
+		" a 1 main/binary-amd64/Packages\n a 1 main/binary-amd64/Packages.xz\n a 1 main/binary-amd64/Packages.gz\n" +
+		" a 1 main/debian-installer/binary-amd64/Packages.xz\n a 1 main/i18n/Translation-en.xz\n a 1 contrib/binary-all/Packages\n"))
+	got := debIndexFiles(rel)
+	want := map[string]string{"main/binary-amd64/": "main/binary-amd64/Packages.xz", "contrib/binary-all/": "contrib/binary-all/Packages"}
+	if !maps.Equal(got, want) {
+		t.Fatalf("got %v, want %v", got, want)
+	}
+	if flat := debIndexFiles(parseDebRelease([]byte("SHA256:\n a 1 Packages\n a 1 Packages.gz\n"))); flat[""] != "Packages.gz" {
+		t.Fatalf("flat repo should fetch Packages.gz, got %v", flat)
+	}
+}
+
+func TestDebIndexPath(t *testing.T) {
+	for _, tc := range []struct {
+		in, base, name string
+		ok             bool
+	}{
+		{"Release", "", "Release", true},
+		{"Packages.gz", "", "Packages.gz", true},
+		{"dists/trixie/Release", "dists/trixie/", "Release", true},
+		{"dists/trixie/main/binary-amd64/Packages", "dists/trixie/", "main/binary-amd64/Packages", true},
+		{"by-hash/SHA256/abababababababababababababababababababababababababababababababab", "", "by-hash/SHA256/abababababababababababababababababababababababababababababababab", true},
+		{"dists/trixie/main/binary-amd64/by-hash/SHA256/abababababababababababababababababababababababababababababababab", "dists/trixie/", "main/binary-amd64/by-hash/SHA256/abababababababababababababababababababababababababababababababab", true},
+		{"dists/trixie/main/binary-amd64/by-hash/MD5Sum/abababababababababababababababab", "", "", false},
+		{"InRelease", "", "", false},
+		{"Release.gpg", "", "", false},
+		{"dists/trixie/InRelease", "", "", false},
+		{"dists/trixie/main/i18n/Translation-en", "", "", false},
+		{"dists/Release", "", "", false},
+		{"pool/foo.deb", "", "", false},
+	} {
+		base, name, ok := debIndexPath(tc.in)
+		if base != tc.base || name != tc.name || ok != tc.ok {
+			t.Errorf("%s: got (%q, %q, %v), want (%q, %q, %v)", tc.in, base, name, ok, tc.base, tc.name, tc.ok)
+		}
+	}
+}

internal/virtual/engine.go

@@ -9,6 +9,7 @@ import (
 	"net/http"
 	"net/http/httptest"
 	"net/url"
+	"path"
 	"slices"
 	"strings"
 	"sync"
@@ -26,6 +27,7 @@ type Engine struct {
 	proxyEngine *proxy.Engine
 	getRemote   func(context.Context, string) (*models.Remote, error)
 	rpmMember   func(context.Context, string) (*RPMMember, error)
+	debMember   func(ctx context.Context, name, base string) (*DebMember, error)
 
 	mergeTTL time.Duration
 
@@ -42,25 +44,34 @@ type mergedRepo interface {
 
 func (r *RPMRepo) index() []byte            { return r.Repomd }
 func (r *RPMRepo) files() map[string][]byte { return r.Files }
+func (r *DebRepo) index() []byte            { return r.Release }
+func (r *DebRepo) files() map[string][]byte { return r.Files }
 
 // repoGen holds a virtual's current merge plus the previous one, so a client
 // holding the previous index can still fetch the files it references.
 type repoGen struct {
 	cur, prev mergedRepo
-	at        time.Time
+	at, used  time.Time
 }
 
 const rpmMergeTTL = 60 * time.Second
 
+// maxDebSuites bounds the client-chosen suites cached per deb virtual.
+const maxDebSuites = 32
+
 func NewEngine(db *database.DB, proxyEngine *proxy.Engine) *Engine {
 	e := &Engine{db: db, proxyEngine: proxyEngine, getRemote: db.GetRemote, mergeTTL: rpmMergeTTL}
 	e.rpmMember = e.fetchRPMMember
+	e.debMember = e.fetchDebMember
 	return e
 }
 
 func (e *Engine) Fetch(ctx context.Context, virt models.Virtual, path string, proxyBaseURL string) ([]byte, string, error) {
-	if virt.PackageType == models.PackageRPM {
+	switch virt.PackageType {
+	case models.PackageRPM:
 		return e.fetchRPM(ctx, virt, path)
+	case models.PackageDeb:
+		return e.fetchDeb(ctx, virt, path)
 	}
 
 	merger, err := GetMerger(virt.PackageType)
@@ -179,11 +190,22 @@ var (
 	ErrBadPath  = errors.New("invalid path")
 )
 
-// MemberRedirect maps an rpm virtual package path (<member>/<href>, as written
-// by MergeRPM) to the owning member's route. ok is false for any other path;
-// ErrBadPath means the path is absolute or escapes the member.
+// MemberRedirect maps an rpm or deb virtual package path (<member>/<href>, as
+// written by MergeRPM/MergeDeb) to the owning member's route. ok is false for
+// any other path; ErrBadPath means the path is absolute or escapes the member.
 func (e *Engine) MemberRedirect(ctx context.Context, virt models.Virtual, path, rawQuery, proxyBaseURL string) (string, bool, error) {
-	if virt.PackageType != models.PackageRPM || strings.HasPrefix(path, "repodata/") {
+	switch virt.PackageType {
+	case models.PackageRPM:
+		if strings.HasPrefix(path, "repodata/") {
+			return "", false, nil
+		}
+	case models.PackageDeb:
+		// apt requests a flat repo's files under its "./" dist verbatim.
+		path = strings.TrimPrefix(path, "./")
+		if strings.HasPrefix(path, "dists/") {
+			return "", false, nil
+		}
+	default:
 		return "", false, nil
 	}
 	name, rest, found := strings.Cut(path, "/")
@@ -257,6 +279,7 @@ func (e *Engine) merged(ctx context.Context, key string, merge func(context.Cont
 	e.mu.Lock()
 	g := e.gens[key]
 	if g != nil && time.Since(g.at) < e.mergeTTL {
+		g.used = time.Now()
 		e.mu.Unlock()
 		return g.cur, nil
 	}
@@ -275,12 +298,12 @@ func (e *Engine) merged(ctx context.Context, key string, merge func(context.Cont
 		g := e.gens[key]
 		switch {
 		case g == nil:
-			e.gens[key] = &repoGen{cur: repo, at: time.Now()}
+			e.gens[key] = &repoGen{cur: repo, at: time.Now(), used: time.Now()}
 		case string(g.cur.index()) == string(repo.index()):
-			g.at = time.Now()
+			g.at, g.used = time.Now(), time.Now()
 			repo = g.cur
 		default:
-			g.prev, g.cur, g.at = g.cur, repo, time.Now()
+			g.prev, g.cur, g.at, g.used = g.cur, repo, time.Now(), time.Now()
 		}
 		return repo, nil
 	})
@@ -327,6 +350,85 @@ func fetchMembers[T any](virt models.Virtual, fetch func(name string) (*T, error
 	return members, nil
 }
 
+func (e *Engine) fetchDeb(ctx context.Context, virt models.Virtual, reqPath string) ([]byte, string, error) {
+	base, name, ok := debIndexPath(strings.TrimPrefix(path.Clean("/"+reqPath), "/"))
+	if !ok {
+		return nil, "", ErrNotFound
+	}
+	key := "deb\x00" + virt.Name + "\x00" + base
+	if name != "Release" {
+		if body, ok := e.cachedFile(key, name); ok {
+			return body, debContentType(name), nil
+		}
+	}
+
+	repo, err := e.merged(ctx, key, func(ctx context.Context) (mergedRepo, error) {
+		members, err := fetchMembers(virt, func(name string) (*DebMember, error) { return e.debMember(ctx, name, base) })
+		if err != nil {
+			return nil, err
+		}
+		return MergeDeb(members), nil
+	})
+	if err != nil {
+		return nil, "", err
+	}
+	e.evictLRU("deb\x00"+virt.Name+"\x00", maxDebSuites)
+	if name == "Release" {
+		return repo.index(), "text/plain", nil
+	}
+	if body, ok := repo.files()[name]; ok {
+		return body, debContentType(name), nil
+	}
+	return nil, "", ErrNotFound
+}
+
+func debContentType(name string) string {
+	if strings.HasSuffix(name, ".gz") {
+		return "application/gzip"
+	}
+	return "text/plain"
+}
+
+// fetchDebMember reads a member's Release under base and each binary Packages
+// index it lists.
+func (e *Engine) fetchDebMember(ctx context.Context, name, base string) (*DebMember, error) {
+	remote, err := e.getRemote(ctx, name)
+	if err != nil {
+		return nil, fmt.Errorf("remote %q: %w", name, err)
+	}
+	rel, err := e.fetchMemberPath(ctx, *remote, base+"Release")
+	if err != nil {
+		return nil, err
+	}
+	m := &DebMember{RemoteName: name, Release: rel, Packages: map[string][]byte{}}
+	for dir, file := range debIndexFiles(parseDebRelease(rel)) {
+		raw, err := e.fetchMemberPath(ctx, *remote, base+file)
+		if err != nil {
+			return nil, err
+		}
+		if m.Packages[dir], err = decompress(file, raw); err != nil {
+			return nil, fmt.Errorf("decompress %s: %w", file, err)
+		}
+	}
+	return m, nil
+}
+
+// evictLRU drops the least recently used merges under prefix beyond keep.
+func (e *Engine) evictLRU(prefix string, keep int) {
+	e.mu.Lock()
+	defer e.mu.Unlock()
+	var keys []string
+	for k := range e.gens {
+		if strings.HasPrefix(k, prefix) {
+			keys = append(keys, k)
+		}
+	}
+	slices.SortFunc(keys, func(a, b string) int { return e.gens[b].used.Compare(e.gens[a].used) })
+	for _, k := range keys[min(len(keys), keep):] {
+		delete(e.gens, k)
+	}
+}
+
 func (e *Engine) cachedFile(key, path string) ([]byte, bool) {
 	e.mu.Lock()
 	defer e.mu.Unlock()
@@ -339,6 +441,7 @@ func (e *Engine) cachedFile(key, path string) ([]byte, bool) {
 			continue
 		}
 		if body, ok := r.files()[path]; ok {
+			g.used = time.Now()
 			return body, true
 		}
 	}

internal/virtual/engine_test.go

@@ -5,6 +5,7 @@ import (
 	"errors"
 	"fmt"
 	"regexp"
+	"strings"
 	"sync"
 	"sync/atomic"
 	"testing"
@@ -157,6 +158,97 @@ func TestMemberRedirect(t *testing.T) {
 	}
 }
 
+func debEngine(members map[string]*DebMember) *Engine {
+	e := fakeEngine(nil)
+	e.debMember = func(_ context.Context, name, base string) (*DebMember, error) {
+		if m := members[name]; m != nil && base == "" {
+			return m, nil
+		}
+		return nil, errors.New("upstream down")
+	}
+	return e
+}
+
+func debVirt(members ...string) models.Virtual {
+	return models.Virtual{Name: "v", PackageType: models.PackageDeb, Members: members}
+}
+
+func TestFetchDebFailsClosed(t *testing.T) {
+	a := flatDebMember("a", "", debStanza("foo", "1", "amd64", "pool/foo.deb"))
+	e := debEngine(map[string]*DebMember{"a": &a})
+	for _, p := range []string{"Release", "./Packages.gz", "dists/trixie/Release"} {
+		if _, _, err := e.Fetch(context.Background(), debVirt("a", "b"), p, ""); err == nil || errors.Is(err, ErrNotFound) {
+			t.Errorf("%s: want upstream error with a member down, got %v", p, err)
+		}
+	}
+	for _, p := range []string{"InRelease", "./Release.gpg", "Packages.xz"} {
+		if _, _, err := e.Fetch(context.Background(), debVirt("a"), p, ""); !errors.Is(err, ErrNotFound) {
+			t.Errorf("%s: want not found, got %v", p, err)
+		}
+	}
+}
+
+func TestFetchDebRemergesAfterTTL(t *testing.T) {
+	a := flatDebMember("a", "", debStanza("foo", "1", "amd64", "pool/foo_1.deb"))
+	e := debEngine(map[string]*DebMember{"a": &a})
+	virt := debVirt("a")
+
+	rel, _, err := e.Fetch(context.Background(), virt, "./Release", "")
+	if err != nil {
+		t.Fatal(err)
+	}
+	a.Packages[""] = []byte(debStanza("foo", "2", "amd64", "pool/foo_2.deb"))
+	e.mergeTTL = 0
+	newRel, _, err := e.Fetch(context.Background(), virt, "Release", "")
+	if err != nil || string(newRel) == string(rel) {
+		t.Fatalf("Release should reflect the member change (err %v)", err)
+	}
+	pk, ct, err := e.Fetch(context.Background(), virt, "./Packages", "")
+	if err != nil || ct != "text/plain" || !strings.Contains(string(pk), "Version: 2") {
+		t.Fatalf("Packages should be the current merge (ct %q, err %v):\n%s", ct, err, pk)
+	}
+}
+
+func TestFetchDebMergeIsSharedPerSuite(t *testing.T) {
+	var calls atomic.Int32
+	e := fakeEngine(nil)
+	e.mergeTTL = time.Minute
+	e.debMember = func(_ context.Context, name, base string) (*DebMember, error) {
+		calls.Add(1)
+		m := flatDebMember(name, "", debStanza("foo", "1", "amd64", "pool/foo.deb"))
+		return &m, nil
+	}
+	for _, p := range []string{"Release", "Packages", "Packages.gz", "./Release", "dists/a/Release", "dists/b/Release"} {
+		if _, _, err := e.Fetch(context.Background(), debVirt("a"), p, ""); err != nil && !errors.Is(err, ErrNotFound) {
+			t.Fatal(err)
+		}
+	}
+	if n := calls.Load(); n != 3 {
+		t.Fatalf("member fetched %d times, want once per Release dir (3)", n)
+	}
+}
+
+func TestMemberRedirectDeb(t *testing.T) {
+	e := fakeEngine(nil)
+	virt := debVirt("gh", "loc")
+	for _, tc := range []struct {
+		path, want string
+		ok         bool
+		err        error
+	}{
+		{path: "gh/o/r/releases/download/v1/foo_1.0_amd64.deb", ok: true, want: "http://h/api/v1/remote/gh/o/r/releases/download/v1/foo_1.0_amd64.deb"},
+		{path: "./gh/pool/a+b.deb", ok: true, want: "http://h/api/v1/remote/gh/pool/a+b.deb"},
+		{path: "gh/../loc/x.deb", err: ErrBadPath},
+		{path: "dists/trixie/Release"},
+		{path: "Packages"},
+	} {
+		got, ok, err := e.MemberRedirect(context.Background(), virt, tc.path, "", "http://h/")
+		if got != tc.want || ok != tc.ok || !errors.Is(err, tc.err) {
+			t.Errorf("%s: got (%q, %v, %v), want (%q, %v, %v)", tc.path, got, ok, err, tc.want, tc.ok, tc.err)
+		}
+	}
+}
+
 type fakeRepo struct {
 	idx string
 	fs  map[string][]byte
@@ -206,3 +298,72 @@ func TestMergedReusesWithinTTLAndIsolatesKeys(t *testing.T) {
 		t.Error("unknown key served a file")
 	}
 }
+
+func suiteDebMember(name, version string) *DebMember {
+	return &DebMember{RemoteName: name, Release: []byte("Suite: s\nSHA256:\n x 1 main/binary-amd64/Packages.gz\n"),
+		Packages: map[string][]byte{"main/binary-amd64/": []byte(debStanza("foo", version, "amd64", "pool/foo_"+version+".deb"))}}
+}
+
+func TestFetchDebByHashSurvivesRemerge(t *testing.T) {
+	version := "1"
+	e := fakeEngine(nil)
+	e.debMember = func(_ context.Context, name, _ string) (*DebMember, error) { return suiteDebMember(name, version), nil }
+	virt := debVirt("a")
+	fetch := func(p string) []byte {
+		body, _, err := e.Fetch(context.Background(), virt, p, "")
+		if err != nil {
+			t.Fatalf("%s: %v", p, err)
+		}
+		return body
+	}
+	byHash := func(rel []byte) string {
+		m := regexp.MustCompile(`(?m)^SHA256:\n(?: .*\n)*? ([0-9a-f]{64}) \d+ main/binary-amd64/Packages.gz$`).FindSubmatch(rel)
+		if m == nil {
+			t.Fatalf("no Packages.gz SHA256 in Release:\n%s", rel)
+		}
+		return "dists/trixie/main/binary-amd64/by-hash/SHA256/" + string(m[1])
+	}
+
+	oldRel := fetch("dists/trixie/Release")
+	version, e.mergeTTL = "2", 0
+	if newRel := fetch("dists/trixie/Release"); string(newRel) == string(oldRel) {
+		t.Fatal("Release should reflect the member change")
+	}
+	if got := string(gunzip(t, fetch(byHash(oldRel)))); !strings.Contains(got, "Version: 1\n") {
+		t.Fatalf("by-hash from the previous Release served the wrong index:\n%s", got)
+	}
+	if got := string(fetch("dists/trixie/main/binary-amd64/Packages")); !strings.Contains(got, "Version: 2\n") {
+		t.Fatalf("fixed-name Packages should be the current merge:\n%s", got)
+	}
+}
+
+func TestFetchDebBoundsSuitesPerVirtual(t *testing.T) {
+	e := fakeEngine(nil)
+	e.mergeTTL = time.Minute
+	e.debMember = func(_ context.Context, name, _ string) (*DebMember, error) { return suiteDebMember(name, "1"), nil }
+	other := models.Virtual{Name: "other", PackageType: models.PackageDeb, Members: []string{"a"}}
+	if _, _, err := e.Fetch(context.Background(), other, "dists/keep/Release", ""); err != nil {
+		t.Fatal(err)
+	}
+	for i := range maxDebSuites + 5 {
+		if _, _, err := e.Fetch(context.Background(), debVirt("a"), fmt.Sprintf("dists/s%d/Release", i), ""); err != nil {
+			t.Fatal(err)
+		}
+		time.Sleep(time.Microsecond)
+	}
+	n := 0
+	for k := range e.gens {
+		if strings.HasPrefix(k, "deb\x00v\x00") {
+			n++
+		}
+	}
+	if n != maxDebSuites {
+		t.Fatalf("virtual v caches %d suites, want %d", n, maxDebSuites)
+	}
+	if e.gens["deb\x00v\x00dists/s0/"] != nil || e.gens["deb\x00v\x00dists/s4/"] != nil {
+		t.Fatal("least recently used suites should be evicted first")
+	}
+	if e.gens["deb\x00other\x00dists/keep/"] == nil {
+		t.Fatal("another virtual's suites must not be evicted")
+	}
+}

internal/virtual/helm_merger.go

@@ -2,14 +2,10 @@ package virtual
 
 import (
 	"fmt"
-	"log/slog"
-	"maps"
-	"slices"
 	"strings"
 
 	"gopkg.in/yaml.v3"
 
-	"git.unkin.net/unkin/artifactapi/internal/provider"
 	"git.unkin.net/unkin/artifactapi/pkg/models"
 )
 
@@ -20,17 +16,22 @@ func init() {
 type HelmMerger struct{}
 
 type helmIndex struct {
-	APIVersion string                            `yaml:"apiVersion"`
-	Entries    map[string][]map[string]yaml.Node `yaml:"entries"`
-	Generated  string                            `yaml:"generated,omitempty"`
+	APIVersion string                        `yaml:"apiVersion"`
+	Entries    map[string][]helmChartVersion `yaml:"entries"`
+	Generated  string                        `yaml:"generated,omitempty"`
+}
+
+type helmChartVersion struct {
+	Name    string   `yaml:"name"`
+	Version string   `yaml:"version"`
+	URLs    []string `yaml:"urls"`
+	rest    map[string]any
 }
 
-// MergeIndexes keeps each chart version's fields as raw nodes so digest,
-// apiVersion and the rest survive the merge untouched; only urls are rewritten.
 func (m *HelmMerger) MergeIndexes(members []MemberIndex, proxyBaseURL string) ([]byte, error) {
 	merged := &helmIndex{
 		APIVersion: "v1",
-		Entries:    make(map[string][]map[string]yaml.Node),
+		Entries:    make(map[string][]helmChartVersion),
 	}
 
 	seen := map[string]map[string]bool{}
@@ -41,38 +42,47 @@ func (m *HelmMerger) MergeIndexes(members []MemberIndex, proxyBaseURL string) ([
 			continue
 		}
 
-		budget := provider.MaxAliasExpandedNodes
-		for _, chart := range slices.Sorted(maps.Keys(idx.Entries)) {
-			versions := idx.Entries[chart]
+		for chart, versions := range idx.Entries {
 			if seen[chart] == nil {
 				seen[chart] = map[string]bool{}
 			}
-			for _, raw := range versions {
-				ver, err := provider.ExpandYAMLAliases(raw, &budget)
-				if err != nil {
-					slog.Warn("helm merge: dropping chart entry", "member", member.RemoteName, "chart", chart, "error", err)
+			for _, ver := range versions {
+				key := chart + ":" + ver.Version
+				if seen[chart][ver.Version] {
 					continue
 				}
-				version := ver["version"].Value
-				if seen[chart][version] {
-					continue
-				}
-				seen[chart][version] = true
+				seen[chart][ver.Version] = true
 
-				if urlsNode, ok := ver["urls"]; ok && proxyBaseURL != "" {
-					var urls []string
-					if err := urlsNode.Decode(&urls); err != nil {
-						continue
+				if proxyBaseURL != "" {
+					routePrefix := "remote"
+					if member.RepoType == "local" {
+						routePrefix = "local"
 					}
-					rewriteHelmURLs(urls, member, proxyBaseURL)
-					var n yaml.Node
-					if err := n.Encode(urls); err != nil {
-						return nil, err
+					baseHost := extractHost(member.BaseURL)
+
+					for i, u := range ver.URLs {
+						if strings.HasPrefix(u, "http://") || strings.HasPrefix(u, "https://") {
+							if baseHost != "" && extractHost(u) != baseHost {
+								continue
+							}
+							relPath := extractPathRelativeToBase(u, member.BaseURL)
+							ver.URLs[i] = fmt.Sprintf("%s/api/v1/%s/%s/%s",
+								strings.TrimRight(proxyBaseURL, "/"),
+								routePrefix,
+								member.RemoteName,
+								relPath)
+						} else {
+							ver.URLs[i] = fmt.Sprintf("%s/api/v1/%s/%s/%s",
+								strings.TrimRight(proxyBaseURL, "/"),
+								routePrefix,
+								member.RemoteName,
+								u)
+						}
 					}
-					ver["urls"] = n
 				}
 
 				merged.Entries[chart] = append(merged.Entries[chart], ver)
+				_ = key
 			}
 		}
 	}
@@ -80,34 +90,6 @@ func (m *HelmMerger) MergeIndexes(members []MemberIndex, proxyBaseURL string) ([
 	return yaml.Marshal(merged)
 }
 
-func rewriteHelmURLs(urls []string, member MemberIndex, proxyBaseURL string) {
-	routePrefix := "remote"
-	if member.RepoType == "local" {
-		routePrefix = "local"
-	}
-	baseHost := extractHost(member.BaseURL)
-
-	for i, u := range urls {
-		if strings.HasPrefix(u, "http://") || strings.HasPrefix(u, "https://") {
-			if baseHost != "" && extractHost(u) != baseHost {
-				continue
-			}
-			relPath := extractPathRelativeToBase(u, member.BaseURL)
-			urls[i] = fmt.Sprintf("%s/api/v1/%s/%s/%s",
-				strings.TrimRight(proxyBaseURL, "/"),
-				routePrefix,
-				member.RemoteName,
-				relPath)
-		} else {
-			urls[i] = fmt.Sprintf("%s/api/v1/%s/%s/%s",
-				strings.TrimRight(proxyBaseURL, "/"),
-				routePrefix,
-				member.RemoteName,
-				u)
-		}
-	}
-}
-
 func extractHost(rawURL string) string {
 	idx := strings.Index(rawURL, "://")
 	if idx == -1 {

internal/virtual/helm_merger_test.go

@@ -1,12 +1,9 @@
 package virtual_test
 
 import (
-	"fmt"
 	"strings"
 	"testing"
 
-	"gopkg.in/yaml.v3"
-
 	"git.unkin.net/unkin/artifactapi/internal/virtual"
 )
 
@@ -125,129 +122,3 @@ entries:
 		t.Error("expected fallback repo to be excluded for duplicate")
 	}
 }
-
-func TestHelmMerger_PreservesChartFields(t *testing.T) {
-	m := &virtual.HelmMerger{}
-	body := []byte(`apiVersion: v1
-entries:
-  app:
-    - apiVersion: v2
-      name: app
-      version: "1.0"
-      appVersion: "3.1"
-      description: in-house
-      digest: deadbeef
-      urls:
-        - app-1.0.tgz
-`)
-	result, err := m.MergeIndexes([]virtual.MemberIndex{{RemoteName: "charts", RepoType: "local", Body: body}}, "https://proxy.example.com")
-	if err != nil {
-		t.Fatal(err)
-	}
-	out := string(result)
-	for _, want := range []string{
-		"digest: deadbeef",
-		"apiVersion: v2",
-		`appVersion: "3.1"`,
-		"description: in-house",
-		`version: "1.0"`,
-		"https://proxy.example.com/api/v1/local/charts/app-1.0.tgz",
-	} {
-		if !strings.Contains(out, want) {
-			t.Errorf("merged index missing %q:\n%s", want, out)
-		}
-	}
-}
-
-func TestHelmMerger_ExpandsAliasesAcrossDedupe(t *testing.T) {
-	m := &virtual.HelmMerger{}
-	first := []byte(`apiVersion: v1
-entries:
-  app:
-    - version: "1.0"
-      urls: [app-1.0.tgz]
-`)
-	second := []byte(`apiVersion: v1
-entries:
-  app:
-    - version: "1.0"
-      maintainers: &team
-        - name: ops
-      urls: [app-1.0.tgz]
-    - version: "2.0"
-      maintainers: *team
-      urls: [app-2.0.tgz]
-`)
-	result, err := m.MergeIndexes([]virtual.MemberIndex{
-		{RemoteName: "a", RepoType: "local", Body: first},
-		{RemoteName: "b", RepoType: "local", Body: second},
-	}, "https://proxy.example.com")
-	if err != nil {
-		t.Fatal(err)
-	}
-	var idx struct {
-		Entries map[string][]struct {
-			Version     string `yaml:"version"`
-			Maintainers []struct {
-				Name string `yaml:"name"`
-			} `yaml:"maintainers"`
-		} `yaml:"entries"`
-	}
-	if err := yaml.Unmarshal(result, &idx); err != nil {
-		t.Fatalf("merged index does not parse: %v\n%s", err, result)
-	}
-	app := idx.Entries["app"]
-	if len(app) != 2 || app[1].Version != "2.0" || len(app[1].Maintainers) != 1 || app[1].Maintainers[0].Name != "ops" {
-		t.Errorf("alias not expanded: %+v\n%s", app, result)
-	}
-}
-
-func TestHelmMerger_DropsAliasBomb(t *testing.T) {
-	m := &virtual.HelmMerger{}
-	body := []byte(`apiVersion: v1
-entries:
-  app:
-    - version: "1.0"
-      a: &a [x, x, x, x, x, x, x, x, x, x]
-      b: &b [*a, *a, *a, *a, *a, *a, *a, *a, *a, *a]
-      c: &c [*b, *b, *b, *b, *b, *b, *b, *b, *b, *b]
-      d: &d [*c, *c, *c, *c, *c, *c, *c, *c, *c, *c]
-      e: &e [*d, *d, *d, *d, *d, *d, *d, *d, *d, *d]
-      urls: [app-1.0.tgz]
-`)
-	result, err := m.MergeIndexes([]virtual.MemberIndex{{RemoteName: "a", RepoType: "local", Body: body}}, "https://proxy.example.com")
-	if err != nil {
-		t.Fatal(err)
-	}
-	if strings.Contains(string(result), "app-1.0.tgz") {
-		t.Errorf("alias bomb entry was kept")
-	}
-}
-
-func TestHelmMerger_LargeIndexWithoutAliasesIsComplete(t *testing.T) {
-	var b strings.Builder
-	b.WriteString("apiVersion: v1\nentries:\n")
-	for c := 0; c < 100; c++ {
-		fmt.Fprintf(&b, "  chart%d:\n", c)
-		for v := 0; v < 100; v++ {
-			fmt.Fprintf(&b, "    - name: chart%d\n      version: \"1.0.%d\"\n      description: d\n      maintainers: [{name: ops, email: ops@example.com}]\n      urls: [chart%d-1.0.%d.tgz]\n", c, v, c, v)
-		}
-	}
-	result, err := (&virtual.HelmMerger{}).MergeIndexes([]virtual.MemberIndex{{RemoteName: "a", RepoType: "local", Body: []byte(b.String())}}, "https://proxy.example.com")
-	if err != nil {
-		t.Fatal(err)
-	}
-	var idx struct {
-		Entries map[string][]map[string]any `yaml:"entries"`
-	}
-	if err := yaml.Unmarshal(result, &idx); err != nil {
-		t.Fatal(err)
-	}
-	total := 0
-	for _, vs := range idx.Entries {
-		total += len(vs)
-	}
-	if len(idx.Entries) != 100 || total != 10000 {
-		t.Errorf("got %d charts, %d versions; want 100, 10000", len(idx.Entries), total)
-	}
-}

migrations/0004_puppet_metadata.sql

@@ -1,15 +0,0 @@
-CREATE TABLE IF NOT EXISTS puppet_metadata (
-	id            BIGSERIAL PRIMARY KEY,
-	repo_name     TEXT NOT NULL,
-	file_path     TEXT NOT NULL,
-	content_hash  TEXT NOT NULL,
-	slug          TEXT NOT NULL,
-	version       TEXT NOT NULL,
-	metadata_json TEXT NOT NULL,
-	file_size     BIGINT NOT NULL DEFAULT 0,
-	file_md5      TEXT NOT NULL,
-	created_at    TIMESTAMPTZ DEFAULT NOW(),
-	UNIQUE(repo_name, file_path)
-);
-
-CREATE INDEX IF NOT EXISTS idx_puppet_metadata_repo_slug ON puppet_metadata(repo_name, slug);