Add rpm virtual repositories (#131)

Virtual repos only merge helm and pypi, so several rpm repos (e.g. many github_rpm remotes) cannot be served as one yum repo.

- merge member primary/filelists/other into one repodata set; member order wins duplicate NEVRAs
- read member repodata through local, github_rpm and proxied remote paths
- prefix package locations (incl. xml:base under a member upstream) with the member name and 302 them to the member route
- reject absolute and dot-segment member paths; escape the redirect and keep its query
- return 502 when any member's repodata is unavailable
- reuse each virtual's merge for 60s behind singleflight; serve data files from its current and previous merge (per replica)
- add merger/engine unit tests and a dockerised dnf e2e case

Reviewed-on: #131
Co-authored-by: unkin-agent <unkin-agent@unkin.net>
Co-committed-by: unkin-agent <unkin-agent@unkin.net>

.woodpecker/pre-commit.yaml

@@ -3,11 +3,28 @@ when:
 
 steps:
   - name: pre-commit
-    image: git.unkin.net/unkin/almalinux9-gobuilder:20260606
+    # gobuilder trusts the internal CA, which the S3 build cache endpoint needs.
+    # go-cache-plugin is baked into the image; S3 errors degrade to cache misses.
+    image: "artifactapi.k8s.syd1.au.unkin.net/docker-internal/gobuilder:0.1.2-alma9"
     commands:
       - uvx pre-commit run --all-files
+    environment:
+      # golib lives on Gitea; skip the public proxy/sum db.
+      GOPRIVATE: git.unkin.net
+      GOCACHEPROG: "go-cache-plugin --cache-dir=/tmp/gocache"
+      GOCACHE_S3_BUCKET: gocache
+      # Explicit region skips a GetBucketLocation probe RGW handles poorly.
+      GOCACHE_S3_REGION: us-east-1
+      GOCACHE_S3_ENDPOINT_URL: "https://s3.ceph.unkin.net"
+      GOCACHE_S3_PATH_STYLE: "true"
+      GOCACHE_KEY_PREFIX: ci-artifactapi
+      AWS_ACCESS_KEY_ID:
+        from_secret: GOCACHE_AWS_ACCESS_KEY_ID
+      AWS_SECRET_ACCESS_KEY:
+        from_secret: GOCACHE_AWS_SECRET_ACCESS_KEY
     backend_options:
       kubernetes:
+        serviceAccountName: default
         resources:
           requests:
             memory: 512Mi

.woodpecker/test.yaml

@@ -3,6 +3,32 @@ when:
 
 steps:
   - name: test
-    image: golang:1.25
+    # gobuilder trusts the internal CA, which the S3 build cache endpoint needs.
+    # go-cache-plugin is baked into the image; S3 errors degrade to cache misses.
+    image: "artifactapi.k8s.syd1.au.unkin.net/docker-internal/gobuilder:0.1.2-alma9"
     commands:
       - go test -race -count=1 ./pkg/... ./internal/...
+    environment:
+      # golib lives on Gitea; skip the public proxy/sum db.
+      GOPRIVATE: git.unkin.net
+      GOCACHEPROG: "go-cache-plugin --cache-dir=/tmp/gocache"
+      GOCACHE_S3_BUCKET: gocache
+      # Explicit region skips a GetBucketLocation probe RGW handles poorly.
+      GOCACHE_S3_REGION: us-east-1
+      GOCACHE_S3_ENDPOINT_URL: "https://s3.ceph.unkin.net"
+      GOCACHE_S3_PATH_STYLE: "true"
+      GOCACHE_KEY_PREFIX: ci-artifactapi
+      AWS_ACCESS_KEY_ID:
+        from_secret: GOCACHE_AWS_ACCESS_KEY_ID
+      AWS_SECRET_ACCESS_KEY:
+        from_secret: GOCACHE_AWS_SECRET_ACCESS_KEY
+    backend_options:
+      kubernetes:
+        serviceAccountName: default
+        resources:
+          requests:
+            memory: 1Gi
+            cpu: 1
+          limits:
+            memory: 4Gi
+            cpu: 2

Dockerfile

@@ -4,6 +4,10 @@ RUN apk add --no-cache git
 
 WORKDIR /build
 
+# golib is fetched straight from Gitea; the public proxy and sum db have no
+# view of git.unkin.net modules.
+ENV GOPRIVATE=git.unkin.net
+
 COPY go.mod go.sum ./
 RUN go mod download
 

Makefile

@@ -6,6 +6,11 @@ VERSION ?= $(shell git describe --tags --always --dirty 2>/dev/null || echo "0.0
 GO_VERSION_REQUIRED := 1.23
 GO_VERSION_ACTUAL := $(shell go version | sed 's/go version go\([0-9]*\.[0-9]*\).*/\1/')
 
+# git.unkin.net modules (golib) are fetched straight from Gitea, never via the
+# public proxy or sum db, which have no view of them. Exported here rather than
+# written with `go env -w`, so a fresh checkout needs no machine-local setup.
+export GOPRIVATE := git.unkin.net
+
 check-go:
 	@if [ "$$(printf '%s\n%s' "$(GO_VERSION_REQUIRED)" "$(GO_VERSION_ACTUAL)" | sort -V | head -1)" != "$(GO_VERSION_REQUIRED)" ]; then \
 		echo "ERROR: Go >= $(GO_VERSION_REQUIRED) required, found $(GO_VERSION_ACTUAL)"; exit 1; \

README.md

@@ -1,6 +1,6 @@
 # ArtifactAPI
 
-Caching proxy for package repositories. Single Go binary, 10 package types, content-addressable storage, managed by Terraform.
+Caching proxy for package repositories. Single Go binary, 11 package types, content-addressable storage, managed by Terraform.
 
 ## Quick Start
 
@@ -32,6 +32,7 @@ API: `http://localhost:8000` | Frontend: `http://localhost:5173`
 | `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` |
 | `github_rpm` | `repodata/*` (synthesized) | `.rpm` (redirected) |
 
 Providers classify paths automatically. Users only configure what to proxy and TTLs.
@@ -321,6 +322,28 @@ S3/MinIO    ─── content-addressable blob storage (blobs/sha256/{hash})
 
 S3 client supports MinIO, Ceph RGW, and AWS S3 (via minio-go).
 
+### Schema migrations
+
+The SQL schema lives in `migrations/` as numbered `.sql` files, embedded into
+the binary and applied at startup before the server listens, so there is no
+mirrored copy of the schema in the deployment to drift out of sync.
+
+The runner is [`golib/pg`](https://git.unkin.net/unkin/golib)'s `pg.NewMigrated`
+— artifactapi owns the SQL, the shared library owns the mechanics.
+
+Each start takes `pg_advisory_lock` on a fixed key (FNV-1a/64 of the lock name
+`artifactapi-migrations`), creates `schema_migrations` (`version`, `applied_at`)
+if missing, and applies every embedded file whose filename is not yet recorded —
+in lexical (version) order, each file's SQL and its tracking row in one
+transaction — then unlocks. Replicas starting together queue on the lock and
+then find nothing to do.
+
+A file absent from `schema_migrations` is re-run even when the database already
+has the schema, which is how a database migrated by the old untracked inline DDL
+picks `0001_init.sql` up: the statements are `IF NOT EXISTS`-guarded, so the
+re-run is a no-op that only lands the tracking row. New migrations must stay
+additive and idempotent for the same reason; a test enforces it.
+
 ## Environment Variables
 
 | Variable | Default | Description |
@@ -331,6 +354,7 @@ S3 client supports MinIO, Ceph RGW, and AWS S3 (via minio-go).
 | `DBUSER` | `artifacts` | PostgreSQL user |
 | `DBPASS` | | PostgreSQL password |
 | `DBNAME` | `artifacts` | PostgreSQL database |
+| `DBSSL` | `disable` | PostgreSQL `sslmode` |
 | `REDIS_URL` | `redis://localhost:6379` | Redis URL |
 | `MINIO_ENDPOINT` | `localhost:9000` | S3 endpoint |
 | `MINIO_ACCESS_KEY` | | S3 access key |
@@ -358,6 +382,22 @@ make lint        # golangci-lint + go vet
 make fmt         # gofmt + goimports
 ```
 
+### `GOPRIVATE`
+
+artifactapi depends on `git.unkin.net/unkin/golib`, which is served by Gitea and
+is unknown to `proxy.golang.org` / `sum.golang.org`. Module resolution therefore
+needs:
+
+```
+export GOPRIVATE=git.unkin.net
+```
+
+The `Makefile` exports it for every target, and the `Dockerfile` and the
+woodpecker Go steps set it themselves, so `make build|test|lint` and CI work on
+a clean checkout. Only bare `go` commands run outside `make` need it in your
+shell — set it there (or in your shell profile) rather than with `go env -w`,
+which is machine state this repo cannot carry.
+
 ### TUI
 
 ```bash

e2e-docker/README.md

@@ -23,7 +23,7 @@ already-running stack.
 
 - **Repository lifecycle** — add / change / delete for remote, local and virtual repos.
 - **Caching** — one immutable artifact per remote package type (generic, docker,
-  helm, pypi, npm, rpm, alpine, puppet, terraform, goproxy) proxied through the
+  helm, pypi, npm, rpm, alpine, puppet, terraform, goproxy, cargo) proxied through the
   mock upstream: first fetch `X-Artifact-Source: remote`, second `cache`, bytes
   verified against the origin fixture.
 - **Local uploads** — generic (upload/download), pypi (wheel + generated `simple/`

e2e-docker/caching_test.go

@@ -29,6 +29,7 @@ func TestCachingPerProvider(t *testing.T) {
 		{"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"},
 		{"terraform", "hashicorp/aws/download/pkg.zip", "v1/providers/hashicorp/aws/download/pkg.zip"},
 		{"docker", "library/testimg/blobs/blobdata", "v2/library/testimg/blobs/blobdata"},
 	}

e2e-docker/virtual_test.go

@@ -3,9 +3,17 @@
 package e2edocker
 
 import (
+	"bytes"
+	"compress/gzip"
+	"encoding/xml"
+	"fmt"
+	"io"
 	"net/http"
+	"os"
+	"os/exec"
 	"strings"
 	"testing"
+	"time"
 )
 
 // TestVirtualPyPIMerge uploads different packages to two pypi locals and
@@ -52,3 +60,79 @@ func TestVirtualHelmMerge(t *testing.T) {
 		t.Fatalf("merged helm index missing a member chart (want alpha and beta): %s", s)
 	}
 }
+
+// TestVirtualRPMMerge merges a remote rpm repo and a local rpm repo carrying the
+// same package: the first member wins the duplicate, its package download
+// routes through the virtual, and a real dnf can consume the merged repo.
+func TestVirtualRPMMerge(t *testing.T) {
+	createRepo(t, `{"name":"vrpm-remote","package_type":"rpm","repo_type":"remote","base_url":"`+mockUpstream()+`/rpm-mirror","stale_on_error":true}`)
+	createRepo(t, `{"name":"vrpm-local","package_type":"rpm","repo_type":"local"}`)
+	defer deleteRepo(t, "vrpm-remote")
+	defer deleteRepo(t, "vrpm-local")
+
+	pkg := fixtureBytes(t, "rpmrepo/Packages/e2e-testpkg-1.0-1.noarch.rpm")
+	uploadFile(t, "vrpm-local", "e2e-testpkg-1.0-1.noarch.rpm", pkg, "application/x-rpm")
+
+	createVirtual(t, `{"name":"vrpm","package_type":"rpm","members":["vrpm-remote","vrpm-local"]}`)
+	defer deleteVirtual(t, "vrpm")
+
+	resp, body := getEventually(t, api("/api/v1/virtual/vrpm/repodata/repomd.xml"), 15*time.Second)
+	if resp.StatusCode != http.StatusOK {
+		t.Fatalf("virtual repomd.xml: status %d: %s", resp.StatusCode, body)
+	}
+	var md struct {
+		Data []struct {
+			Type     string `xml:"type,attr"`
+			Location struct {
+				Href string `xml:"href,attr"`
+			} `xml:"location"`
+		} `xml:"data"`
+	}
+	if err := xml.Unmarshal(body, &md); err != nil {
+		t.Fatalf("parse repomd.xml: %v\n%s", err, body)
+	}
+	var primary []byte
+	for _, d := range md.Data {
+		if d.Type == "primary" {
+			resp, gz := doRequest(t, http.MethodGet, api("/api/v1/virtual/vrpm/"+d.Location.Href), nil, "")
+			if resp.StatusCode != http.StatusOK {
+				t.Fatalf("primary: status %d", resp.StatusCode)
+			}
+			r, err := gzip.NewReader(bytes.NewReader(gz))
+			if err != nil {
+				t.Fatal(err)
+			}
+			primary, _ = io.ReadAll(r)
+		}
+	}
+	href := "vrpm-remote/Packages/e2e-testpkg-1.0-1.noarch.rpm"
+	if strings.Count(string(primary), "<name>e2e-testpkg</name>") != 1 || !strings.Contains(string(primary), `href="`+href+`"`) {
+		t.Fatalf("merged primary should hold one e2e-testpkg owned by the first member:\n%s", primary)
+	}
+
+	resp, got := doRequest(t, http.MethodGet, api("/api/v1/virtual/vrpm/"+href), nil, "")
+	if resp.StatusCode != http.StatusOK || !bytes.Equal(got, pkg) {
+		t.Fatalf("package via virtual: status %d, %d bytes (want %d)", resp.StatusCode, len(got), len(pkg))
+	}
+
+	network := os.Getenv("COMPOSE_NETWORK")
+	internal := os.Getenv("ARTIFACTAPI_INTERNAL")
+	if network == "" || internal == "" {
+		t.Skip("COMPOSE_NETWORK/ARTIFACTAPI_INTERNAL not set; skipping real dnf")
+	}
+	if _, err := exec.LookPath("docker"); err != nil {
+		t.Skip("docker not available on the test host")
+	}
+	repoConf := fmt.Sprintf("[vrpm]\nname=vrpm\nbaseurl=%s/api/v1/virtual/vrpm/\nenabled=1\ngpgcheck=0\nmetadata_expire=0\n", strings.TrimRight(internal, "/"))
+	script := "set -euo pipefail; " +
+		"printf '%s' \"$REPO\" > /etc/yum.repos.d/vrpm.repo; " +
+		"dnf -y --disablerepo='*' --enablerepo=vrpm makecache; " +
+		"dnf -y --disablerepo='*' --enablerepo=vrpm list --available; " +
+		"dnf -y --disablerepo='*' --enablerepo=vrpm install e2e-testpkg; " +
+		"rpm -q e2e-testpkg"
+	out, err := exec.Command("docker", "run", "--rm", "--network", network, "-e", "REPO="+repoConf,
+		"rockylinux:9", "bash", "-c", script).CombinedOutput()
+	if err != nil {
+		t.Fatalf("real dnf against rpm virtual failed: %v\n%s", err, out)
+	}
+}

go.mod

@@ -3,6 +3,7 @@ module git.unkin.net/unkin/artifactapi
 go 1.25.9
 
 require (
+	git.unkin.net/unkin/golib v0.1.0
 	github.com/cavaliergopher/rpm v1.3.0
 	github.com/charmbracelet/bubbletea v1.3.10
 	github.com/charmbracelet/lipgloss v1.1.0
@@ -12,11 +13,12 @@ require (
 	github.com/klauspost/compress v1.19.2
 	github.com/minio/minio-go/v7 v7.2.0
 	github.com/redis/go-redis/v9 v9.20.0
-	github.com/testcontainers/testcontainers-go v0.42.0
+	github.com/testcontainers/testcontainers-go v0.44.0
-	github.com/testcontainers/testcontainers-go/modules/postgres v0.42.0
+	github.com/testcontainers/testcontainers-go/modules/postgres v0.44.0
 	github.com/testcontainers/testcontainers-go/modules/redis v0.42.0
 	github.com/ulikunitz/xz v0.5.16
-	golang.org/x/crypto v0.51.0
+	golang.org/x/crypto v0.54.0
+	golang.org/x/sync v0.22.0
 	golang.org/x/time v0.15.0
 	gopkg.in/yaml.v3 v3.0.1
 )
@@ -41,22 +43,22 @@ require (
 	github.com/cpuguy83/dockercfg v0.3.2 // indirect
 	github.com/davecgh/go-spew v1.1.1 // indirect
 	github.com/distribution/reference v0.6.0 // indirect
-	github.com/docker/go-connections v0.6.0 // indirect
+	github.com/docker/go-connections v0.7.0 // indirect
 	github.com/docker/go-units v0.5.0 // indirect
 	github.com/dustin/go-humanize v1.0.1 // indirect
-	github.com/ebitengine/purego v0.10.0 // indirect
+	github.com/ebitengine/purego v0.10.1 // indirect
 	github.com/erikgeiser/coninput v0.0.0-20211004153227-1c3628e74d0f // indirect
-	github.com/felixge/httpsnoop v1.0.4 // indirect
+	github.com/felixge/httpsnoop v1.1.0 // indirect
 	github.com/go-logr/logr v1.4.3 // indirect
 	github.com/go-logr/stdr v1.2.2 // indirect
-	github.com/go-ole/go-ole v1.2.6 // indirect
+	github.com/go-ole/go-ole v1.3.0 // indirect
 	github.com/jackc/pgpassfile v1.0.0 // indirect
 	github.com/jackc/pgservicefile v0.0.0-20240606120523-5a60cdf6a761 // indirect
 	github.com/jackc/puddle/v2 v2.2.2 // indirect
 	github.com/klauspost/cpuid/v2 v2.2.11 // indirect
 	github.com/klauspost/crc32 v1.3.0 // indirect
 	github.com/lucasb-eyer/go-colorful v1.4.0 // indirect
-	github.com/lufia/plan9stats v0.0.0-20211012122336-39d0f177ccd0 // indirect
+	github.com/lufia/plan9stats v0.0.0-20260330125221-c963978e514e // indirect
 	github.com/magiconair/properties v1.8.10 // indirect
 	github.com/mattn/go-isatty v0.0.20 // indirect
 	github.com/mattn/go-localereader v0.0.1 // indirect
@@ -66,10 +68,10 @@ require (
 	github.com/minio/md5-simd v1.1.2 // indirect
 	github.com/moby/docker-image-spec v1.3.1 // indirect
 	github.com/moby/go-archive v0.2.0 // indirect
-	github.com/moby/moby/api v1.54.1 // indirect
+	github.com/moby/moby/api v1.55.0 // indirect
-	github.com/moby/moby/client v0.4.0 // indirect
+	github.com/moby/moby/client v0.5.0 // indirect
 	github.com/moby/patternmatcher v0.6.1 // indirect
-	github.com/moby/sys/sequential v0.6.0 // indirect
+	github.com/moby/sys/sequential v0.7.0 // indirect
 	github.com/moby/sys/user v0.4.0 // indirect
 	github.com/moby/sys/userns v0.1.0 // indirect
 	github.com/moby/term v0.5.2 // indirect
@@ -83,25 +85,24 @@ require (
 	github.com/power-devops/perfstat v0.0.0-20240221224432-82ca36839d55 // indirect
 	github.com/rivo/uniseg v0.4.7 // indirect
 	github.com/rs/xid v1.6.0 // indirect
-	github.com/shirou/gopsutil/v4 v4.26.3 // indirect
+	github.com/shirou/gopsutil/v4 v4.26.6 // indirect
 	github.com/sirupsen/logrus v1.9.4 // indirect
 	github.com/stretchr/testify v1.11.1 // indirect
 	github.com/tinylib/msgp v1.6.1 // indirect
-	github.com/tklauser/go-sysconf v0.3.16 // indirect
+	github.com/tklauser/go-sysconf v0.4.0 // indirect
-	github.com/tklauser/numcpus v0.11.0 // indirect
+	github.com/tklauser/numcpus v0.12.0 // indirect
 	github.com/xo/terminfo v0.0.0-20220910002029-abceb7e1c41e // indirect
 	github.com/yusufpapurcu/wmi v1.2.4 // indirect
 	github.com/zeebo/xxh3 v1.1.0 // indirect
 	go.opentelemetry.io/auto/sdk v1.2.1 // indirect
-	go.opentelemetry.io/contrib/instrumentation/net/http/otelhttp v0.60.0 // indirect
+	go.opentelemetry.io/contrib/instrumentation/net/http/otelhttp v0.69.0 // indirect
-	go.opentelemetry.io/otel v1.41.0 // indirect
+	go.opentelemetry.io/otel v1.44.0 // indirect
-	go.opentelemetry.io/otel/metric v1.41.0 // indirect
+	go.opentelemetry.io/otel/metric v1.44.0 // indirect
-	go.opentelemetry.io/otel/trace v1.41.0 // indirect
+	go.opentelemetry.io/otel/trace v1.44.0 // indirect
 	go.uber.org/atomic v1.11.0 // indirect
 	go.yaml.in/yaml/v3 v3.0.4 // indirect
-	golang.org/x/net v0.53.0 // indirect
+	golang.org/x/net v0.56.0 // indirect
-	golang.org/x/sync v0.20.0 // indirect
+	golang.org/x/sys v0.47.0 // indirect
-	golang.org/x/sys v0.44.0 // indirect
+	golang.org/x/text v0.40.0 // indirect
-	golang.org/x/text v0.37.0 // indirect
 	gopkg.in/ini.v1 v1.67.2 // indirect
 )

go.sum

@@ -1,5 +1,7 @@
 dario.cat/mergo v1.0.2 h1:85+piFYR1tMbRrLcDwR18y4UKJ3aH1Tbzi24VRW1TK8=
 dario.cat/mergo v1.0.2/go.mod h1:E/hbnu0NxMFBjpMIE34DRGLWqDy0g5FuKDhCb31ngxA=
+git.unkin.net/unkin/golib v0.1.0 h1:OjKT5TO7PuXiYQ/1A+I4S2VZ/IsAxXY1reGWwasDMqE=
+git.unkin.net/unkin/golib v0.1.0/go.mod h1:1e3PpMLEfa03Re/6tlk+I2XPWzBQMSpw2MB+Aw2lkX4=
 github.com/AdaLogics/go-fuzz-headers v0.0.0-20240806141605-e8a1dd7889d6 h1:He8afgbRMd7mFxO99hRNu+6tazq8nFF9lIwo9JFroBk=
 github.com/AdaLogics/go-fuzz-headers v0.0.0-20240806141605-e8a1dd7889d6/go.mod h1:8o94RPi1/7XTJvwPpRSzSUedZrtlirdB3r9Z20bi2f8=
 github.com/Azure/go-ansiterm v0.0.0-20250102033503-faa5f7b0171c h1:udKWzYgxTojEKWjV8V+WSxDXJ4NFATAsZjh8iIbsQIg=
@@ -51,18 +53,18 @@ github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c
 github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
 github.com/distribution/reference v0.6.0 h1:0IXCQ5g4/QMHHkarYzh5l+u8T3t73zM5QvfrDyIgxBk=
 github.com/distribution/reference v0.6.0/go.mod h1:BbU0aIcezP1/5jX/8MP0YiH4SdvB5Y4f/wlDRiLyi3E=
-github.com/docker/go-connections v0.6.0 h1:LlMG9azAe1TqfR7sO+NJttz1gy6KO7VJBh+pMmjSD94=
+github.com/docker/go-connections v0.7.0 h1:6SsRfJddP22WMrCkj19x9WKjEDTB+ahsdiGYf0mN39c=
-github.com/docker/go-connections v0.6.0/go.mod h1:AahvXYshr6JgfUJGdDCs2b5EZG/vmaMAntpSFH5BFKE=
+github.com/docker/go-connections v0.7.0/go.mod h1:no1qkHdjq7kLMGUXYAduOhYPSJxxvgWBh7ogVvptn3Q=
 github.com/docker/go-units v0.5.0 h1:69rxXcBk27SvSaaxTtLh/8llcHD8vYHT7WSdRZ/jvr4=
 github.com/docker/go-units v0.5.0/go.mod h1:fgPhTUdO+D/Jk86RDLlptpiXQzgHJF7gydDDbaIK4Dk=
 github.com/dustin/go-humanize v1.0.1 h1:GzkhY7T5VNhEkwH0PVJgjz+fX1rhBrR7pRT3mDkpeCY=
 github.com/dustin/go-humanize v1.0.1/go.mod h1:Mu1zIs6XwVuF/gI1OepvI0qD18qycQx+mFykh5fBlto=
-github.com/ebitengine/purego v0.10.0 h1:QIw4xfpWT6GWTzaW5XEKy3HXoqrJGx1ijYHzTF0/ISU=
+github.com/ebitengine/purego v0.10.1 h1:dewVBCBT2GaMu1SrNTYxQhgQBethzfhiwvZiLGP/qyY=
-github.com/ebitengine/purego v0.10.0/go.mod h1:iIjxzd6CiRiOG0UyXP+V1+jWqUXVjPKLAI0mRfJZTmQ=
+github.com/ebitengine/purego v0.10.1/go.mod h1:iIjxzd6CiRiOG0UyXP+V1+jWqUXVjPKLAI0mRfJZTmQ=
 github.com/erikgeiser/coninput v0.0.0-20211004153227-1c3628e74d0f h1:Y/CXytFA4m6baUTXGLOoWe4PQhGxaX0KpnayAqC48p4=
 github.com/erikgeiser/coninput v0.0.0-20211004153227-1c3628e74d0f/go.mod h1:vw97MGsxSvLiUE2X8qFplwetxpGLQrlU1Q9AUEIzCaM=
-github.com/felixge/httpsnoop v1.0.4 h1:NFTV2Zj1bL4mc9sqWACXbQFVBBg2W3GPvqp8/ESS2Wg=
+github.com/felixge/httpsnoop v1.1.0 h1:3YtUj32ZZkqZtt3sZZsClsymw/QDuVfpNhoA31zeORc=
-github.com/felixge/httpsnoop v1.0.4/go.mod h1:m8KPJKqk1gH5J9DgRY2ASl2lWCfGKXixSwevea8zH2U=
+github.com/felixge/httpsnoop v1.1.0/go.mod h1:Zqxgdd+1Rkcz8euOqdr7lqgCRJztwr5hp9vDSi5UZCE=
 github.com/go-chi/chi/v5 v5.3.0 h1:halUjDxhshgXHMrao5bB8eNBXo/rnzwr8m5m36glehM=
 github.com/go-chi/chi/v5 v5.3.0/go.mod h1:R+tYY2hNuVUUjxoPtqUdgBqevM9s9njzkTLutVsOCto=
 github.com/go-logr/logr v1.2.2/go.mod h1:jdQByPbusPIv2/zmleS9BjJVeZ6kBagPoEUsqbVz/1A=
@@ -70,9 +72,9 @@ github.com/go-logr/logr v1.4.3 h1:CjnDlHq8ikf6E492q6eKboGOC0T8CDaOvkHCIg8idEI=
 github.com/go-logr/logr v1.4.3/go.mod h1:9T104GzyrTigFIr8wt5mBrctHMim0Nb2HLGrmQ40KvY=
 github.com/go-logr/stdr v1.2.2 h1:hSWxHoqTgW2S2qGc0LTAI563KZ5YKYRhT3MFKZMbjag=
 github.com/go-logr/stdr v1.2.2/go.mod h1:mMo/vtBO5dYbehREoey6XUKy/eSumjCCveDpRre4VKE=
-github.com/go-ole/go-ole v1.2.6 h1:/Fpf6oFPoeFik9ty7siob0G6Ke8QvQEuVcuChpwXzpY=
 github.com/go-ole/go-ole v1.2.6/go.mod h1:pprOEPIfldk/42T2oK7lQ4v4JSDwmV0As9GaiUsvbm0=
-github.com/google/go-cmp v0.5.6/go.mod h1:v8dTdLbMG2kIc/vJvl+f65V22dbkXbowE6jgT/gNBxE=
+github.com/go-ole/go-ole v1.3.0 h1:Dt6ye7+vXGIKZ7Xtk4s6/xVdGDQynvom7xCFEdWr6uE=
+github.com/go-ole/go-ole v1.3.0/go.mod h1:5LS6F96DhAwUc7C+1HLexzMXY1xGRSryjyPPKW6zv78=
 github.com/google/go-cmp v0.7.0 h1:wk8382ETsv4JYUZwIsn6YpYiWiBsYLSJiTsyBybVuN8=
 github.com/google/go-cmp v0.7.0/go.mod h1:pXiqmnSA92OHEEa9HXL2W4E7lf9JzCmGVUdgjX3N/iU=
 github.com/google/uuid v1.6.0 h1:NIvaJDMOsjHA8n1jAhLSgzrAzy1Hgr+hNrb57e+94F0=
@@ -100,8 +102,8 @@ github.com/lib/pq v1.10.9 h1:YXG7RB+JIjhP29X+OtkiDnYaXQwpS4JEWq7dtCCRUEw=
 github.com/lib/pq v1.10.9/go.mod h1:AlVN5x4E4T544tWzH6hKfbfQvm3HdbOxrmggDNAPY9o=
 github.com/lucasb-eyer/go-colorful v1.4.0 h1:UtrWVfLdarDgc44HcS7pYloGHJUjHV/4FwW4TvVgFr4=
 github.com/lucasb-eyer/go-colorful v1.4.0/go.mod h1:R4dSotOR9KMtayYi1e77YzuveK+i7ruzyGqttikkLy0=
-github.com/lufia/plan9stats v0.0.0-20211012122336-39d0f177ccd0 h1:6E+4a0GO5zZEnZ81pIr0yLvtUWk2if982qA3F3QD6H4=
+github.com/lufia/plan9stats v0.0.0-20260330125221-c963978e514e h1:Q6MvJtQK/iRcRtzAscm/zF23XxJlbECiGPyRicsX+Ak=
-github.com/lufia/plan9stats v0.0.0-20211012122336-39d0f177ccd0/go.mod h1:zJYVVT2jmtg6P3p1VtQj7WsuWi/y4VnjVBn7F8KPB3I=
+github.com/lufia/plan9stats v0.0.0-20260330125221-c963978e514e/go.mod h1:autxFIvghDt3jPTLoqZ9OZ7s9qTGNAWmYCjVFWPX/zg=
 github.com/magiconair/properties v1.8.10 h1:s31yESBquKXCV9a/ScB3ESkOjUYYv+X0rg8SYxI99mE=
 github.com/magiconair/properties v1.8.10/go.mod h1:Dhd985XPs7jluiymwWYZ0G4Z61jb3vdS329zhj2hYo0=
 github.com/mattn/go-isatty v0.0.20 h1:xfD0iDuEKnDkl03q4limB+vH+GxLEtL/jb4xVJSWWEY=
@@ -122,14 +124,14 @@ github.com/moby/docker-image-spec v1.3.1 h1:jMKff3w6PgbfSa69GfNg+zN/XLhfXJGnEx3N
 github.com/moby/docker-image-spec v1.3.1/go.mod h1:eKmb5VW8vQEh/BAr2yvVNvuiJuY6UIocYsFu/DxxRpo=
 github.com/moby/go-archive v0.2.0 h1:zg5QDUM2mi0JIM9fdQZWC7U8+2ZfixfTYoHL7rWUcP8=
 github.com/moby/go-archive v0.2.0/go.mod h1:mNeivT14o8xU+5q1YnNrkQVpK+dnNe/K6fHqnTg4qPU=
-github.com/moby/moby/api v1.54.1 h1:TqVzuJkOLsgLDDwNLmYqACUuTehOHRGKiPhvH8V3Nn4=
+github.com/moby/moby/api v1.55.0 h1:2/sexvQyqIWS8pRSCFddBfpW2qE7vR7FCL+vN8pxwMc=
-github.com/moby/moby/api v1.54.1/go.mod h1:+RQ6wluLwtYaTd1WnPLykIDPekkuyD/ROWQClE83pzs=
+github.com/moby/moby/api v1.55.0/go.mod h1:+RQ6wluLwtYaTd1WnPLykIDPekkuyD/ROWQClE83pzs=
-github.com/moby/moby/client v0.4.0 h1:S+2XegzHQrrvTCvF6s5HFzcrywWQmuVnhOXe2kiWjIw=
+github.com/moby/moby/client v0.5.0 h1:5XhyPk2fuOWf6RlSFa3MkIIgDZkF25xToXW8Q/BH7cc=
-github.com/moby/moby/client v0.4.0/go.mod h1:QWPbvWchQbxBNdaLSpoKpCdf5E+WxFAgNHogCWDoa7g=
+github.com/moby/moby/client v0.5.0/go.mod h1:rcVpF8ncl9vo5gaIBdol6CnbEtSj1uxMvEV/UrykF/s=
 github.com/moby/patternmatcher v0.6.1 h1:qlhtafmr6kgMIJjKJMDmMWq7WLkKIo23hsrpR3x084U=
 github.com/moby/patternmatcher v0.6.1/go.mod h1:hDPoyOpDY7OrrMDLaYoY3hf52gNCR/YOUYxkhApJIxc=
-github.com/moby/sys/sequential v0.6.0 h1:qrx7XFUd/5DxtqcoH1h438hF5TmOvzC/lspjy7zgvCU=
+github.com/moby/sys/sequential v0.7.0 h1:ASQNGNROJSuOO6LL6bPHbKvuZu6NU8P4ldPWk31zj/8=
-github.com/moby/sys/sequential v0.6.0/go.mod h1:uyv8EUTrca5PnDsdMGXhZe6CCe8U/UiTWd+lL+7b/Ko=
+github.com/moby/sys/sequential v0.7.0/go.mod h1:NfSTAp6V3fw4tmkD62PEcOKeZKquXT8VKCkf7aVR79o=
 github.com/moby/sys/user v0.4.0 h1:jhcMKit7SA80hivmFJcbB1vqmw//wU61Zdui2eQXuMs=
 github.com/moby/sys/user v0.4.0/go.mod h1:bG+tYYYJgaMtRKgEmuueC0hJEAZWwtIbZTB+85uoHjs=
 github.com/moby/sys/userns v0.1.0 h1:tVLXkFOxVu9A64/yh59slHVv9ahO9UIev4JZusOLG/g=
@@ -160,8 +162,8 @@ github.com/rogpeppe/go-internal v1.14.1 h1:UQB4HGPB6osV0SQTLymcB4TgvyWu6ZyliaW0t
 github.com/rogpeppe/go-internal v1.14.1/go.mod h1:MaRKkUm5W0goXpeCfT7UZI6fk/L7L7so1lCWt35ZSgc=
 github.com/rs/xid v1.6.0 h1:fV591PaemRlL6JfRxGDEPl69wICngIQ3shQtzfy2gxU=
 github.com/rs/xid v1.6.0/go.mod h1:7XoLgs4eV+QndskICGsho+ADou8ySMSjJKDIan90Nz0=
-github.com/shirou/gopsutil/v4 v4.26.3 h1:2ESdQt90yU3oXF/CdOlRCJxrP+Am1aBYubTMTfxJ1qc=
+github.com/shirou/gopsutil/v4 v4.26.6 h1:Mzr/npDtQC/xpeEuQKHZt8Zo9CmPvhTj8nkR8w5TLDs=
-github.com/shirou/gopsutil/v4 v4.26.3/go.mod h1:LZ6ewCSkBqUpvSOf+LsTGnRinC6iaNUNMGBtDkJBaLQ=
+github.com/shirou/gopsutil/v4 v4.26.6/go.mod h1:LZ6ewCSkBqUpvSOf+LsTGnRinC6iaNUNMGBtDkJBaLQ=
 github.com/sirupsen/logrus v1.9.4 h1:TsZE7l11zFCLZnZ+teH4Umoq5BhEIfIzfRDZ1Uzql2w=
 github.com/sirupsen/logrus v1.9.4/go.mod h1:ftWc9WdOfJ0a92nsE2jF5u5ZwH8Bv2zdeOC42RjbV2g=
 github.com/stretchr/objx v0.1.0/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME=
@@ -177,18 +179,18 @@ github.com/stretchr/testify v1.8.0/go.mod h1:yNjHg4UonilssWZ8iaSj1OCr/vHnekPRkoO
 github.com/stretchr/testify v1.8.4/go.mod h1:sz/lmYIOXD/1dqDmKjjqLyZ2RngseejIcXlSw2iwfAo=
 github.com/stretchr/testify v1.11.1 h1:7s2iGBzp5EwR7/aIZr8ao5+dra3wiQyKjjFuvgVKu7U=
 github.com/stretchr/testify v1.11.1/go.mod h1:wZwfW3scLgRK+23gO65QZefKpKQRnfz6sD981Nm4B6U=
-github.com/testcontainers/testcontainers-go v0.42.0 h1:He3IhTzTZOygSXLJPMX7n44XtK+qhjat1nI9cneBbUY=
+github.com/testcontainers/testcontainers-go v0.44.0 h1:/Fwh6HY1mIikhnm9e7HwoxGycx0lzRAE0f5VQpjFxzI=
-github.com/testcontainers/testcontainers-go v0.42.0/go.mod h1:vZjdY1YmUA1qEForxOIOazfsrdyORJAbhi0bp8plN30=
+github.com/testcontainers/testcontainers-go v0.44.0/go.mod h1:IcnwQrYTO86xHXu5bvMaBH7ATlbS3Qn1M1QWW3c66rE=
-github.com/testcontainers/testcontainers-go/modules/postgres v0.42.0 h1:GCbb1ndrF7OTDiIvxXyItaDab4qkzTFJ48LKFdM7EIo=
+github.com/testcontainers/testcontainers-go/modules/postgres v0.44.0 h1:8fdv/9y3JMxjQ+ULAcOG8RtgeNu5t9XF9LolSXDuTwM=
-github.com/testcontainers/testcontainers-go/modules/postgres v0.42.0/go.mod h1:IRPBaI8jXdrNfD0e4Zm7Fbcgaz5shKxOQv4axiL09xs=
+github.com/testcontainers/testcontainers-go/modules/postgres v0.44.0/go.mod h1:CFr2LncGYokw+OKjXcr8ARCKG1SaC2UEnGxFBovE86g=
 github.com/testcontainers/testcontainers-go/modules/redis v0.42.0 h1:id/6LH8ZeDrtAUVSuNvZUAJ1kVpb82y1pr9yweAWsRg=
 github.com/testcontainers/testcontainers-go/modules/redis v0.42.0/go.mod h1:uF0jI8FITagQpBNOgweGBmPf6rP4K0SeL1XFPbsZSSY=
 github.com/tinylib/msgp v1.6.1 h1:ESRv8eL3u+DNHUoSAAQRE50Hm162zqAnBoGv9PzScPY=
 github.com/tinylib/msgp v1.6.1/go.mod h1:RSp0LW9oSxFut3KzESt5Voq4GVWyS+PSulT77roAqEA=
-github.com/tklauser/go-sysconf v0.3.16 h1:frioLaCQSsF5Cy1jgRBrzr6t502KIIwQ0MArYICU0nA=
+github.com/tklauser/go-sysconf v0.4.0 h1:7H0uAN+7RkwWRaxhYXDLqa5V3LPrJeV8wmD9dRUgPQU=
-github.com/tklauser/go-sysconf v0.3.16/go.mod h1:/qNL9xxDhc7tx3HSRsLWNnuzbVfh3e7gh/BmM179nYI=
+github.com/tklauser/go-sysconf v0.4.0/go.mod h1:8mTNWyog7H+MpKijp4VmKJAd2bbYQ2zuUwkYRbUArPI=
-github.com/tklauser/numcpus v0.11.0 h1:nSTwhKH5e1dMNsCdVBukSZrURJRoHbSEQjdEbY+9RXw=
+github.com/tklauser/numcpus v0.12.0 h1:NR85qdvHA9pFse3x3weVZ0r0ST8R6l5RHbZrlRaqob4=
-github.com/tklauser/numcpus v0.11.0/go.mod h1:z+LwcLq54uWZTX0u/bGobaV34u6V7KNlTZejzM6/3MQ=
+github.com/tklauser/numcpus v0.12.0/go.mod h1:ABHeXzJnr/qqwguhClkZKT1/8VABcYrsyUiUGobwWJg=
 github.com/ulikunitz/xz v0.5.16 h1:ld6NyySjx5lowVKwJvMRLnW5nxKX/xnpSiFYZ/Lxur0=
 github.com/ulikunitz/xz v0.5.16/go.mod h1:H9Rt/W6/Qj27PGauhQc6nfCDy7vHpzsOThBSaYDoEhw=
 github.com/xo/terminfo v0.0.0-20220910002029-abceb7e1c41e h1:JVG44RsyaB9T2KIHavMF/ppJZNG9ZpyihvCd0w101no=
@@ -201,44 +203,44 @@ github.com/zeebo/xxh3 v1.1.0 h1:s7DLGDK45Dyfg7++yxI0khrfwq9661w9EN78eP/UZVs=
 github.com/zeebo/xxh3 v1.1.0/go.mod h1:IisAie1LELR4xhVinxWS5+zf1lA4p0MW4T+w+W07F5s=
 go.opentelemetry.io/auto/sdk v1.2.1 h1:jXsnJ4Lmnqd11kwkBV2LgLoFMZKizbCi5fNZ/ipaZ64=
 go.opentelemetry.io/auto/sdk v1.2.1/go.mod h1:KRTj+aOaElaLi+wW1kO/DZRXwkF4C5xPbEe3ZiIhN7Y=
-go.opentelemetry.io/contrib/instrumentation/net/http/otelhttp v0.60.0 h1:sbiXRNDSWJOTobXh5HyQKjq6wUC5tNybqjIqDpAY4CU=
+go.opentelemetry.io/contrib/instrumentation/net/http/otelhttp v0.69.0 h1:8tvICD4vSTOOsNrsI4Ljf6C+6UKvpTEH5XY3JMoyPoo=
-go.opentelemetry.io/contrib/instrumentation/net/http/otelhttp v0.60.0/go.mod h1:69uWxva0WgAA/4bu2Yy70SLDBwZXuQ6PbBpbsa5iZrQ=
+go.opentelemetry.io/contrib/instrumentation/net/http/otelhttp v0.69.0/go.mod h1:z9+yiacE0IHRqM4qFfkbt/JYlmYXgss8GY/jXoNuPJI=
-go.opentelemetry.io/otel v1.41.0 h1:YlEwVsGAlCvczDILpUXpIpPSL/VPugt7zHThEMLce1c=
+go.opentelemetry.io/otel v1.44.0 h1:JjwHmHpA4iZ3wBxluu2fbbE7j4kqlE8jXyAyPXH7HqU=
-go.opentelemetry.io/otel v1.41.0/go.mod h1:Yt4UwgEKeT05QbLwbyHXEwhnjxNO6D8L5PQP51/46dE=
+go.opentelemetry.io/otel v1.44.0/go.mod h1:BMgjTHL9WPRlRjL2oZCBTL4whCGtXch2H4BhOPIAyYc=
-go.opentelemetry.io/otel/metric v1.41.0 h1:rFnDcs4gRzBcsO9tS8LCpgR0dxg4aaxWlJxCno7JlTQ=
+go.opentelemetry.io/otel/metric v1.44.0 h1:1w0gILTcHdr3YI+ixLyjemwrVnsMURbTZFrSYCdDdmc=
-go.opentelemetry.io/otel/metric v1.41.0/go.mod h1:xPvCwd9pU0VN8tPZYzDZV/BMj9CM9vs00GuBjeKhJps=
+go.opentelemetry.io/otel/metric v1.44.0/go.mod h1:8O7hanEPBNgEMmybD3s2VBKcgWOCsA6tzHBPODAiquo=
-go.opentelemetry.io/otel/sdk v1.35.0 h1:iPctf8iprVySXSKJffSS79eOjl9pvxV9ZqOWT0QejKY=
+go.opentelemetry.io/otel/sdk v1.44.0 h1:nHYwb9lK+fJPU/dnT6s7W7Z8itMWyqrnVfbheVYrZ58=
-go.opentelemetry.io/otel/sdk v1.35.0/go.mod h1:+ga1bZliga3DxJ3CQGg3updiaAJoNECOgJREo9KHGQg=
+go.opentelemetry.io/otel/sdk v1.44.0/go.mod h1:Osuydd3Se74nqjAKxid74N5eC+jfEqfTegHRnq58oK0=
-go.opentelemetry.io/otel/sdk/metric v1.35.0 h1:1RriWBmCKgkeHEhM7a2uMjMUfP7MsOF5JpUCaEqEI9o=
+go.opentelemetry.io/otel/sdk/metric v1.44.0 h1:3LlKgI+VjbVsjNRFZJZAJ30WjXC5VkNRks6si09iEfI=
-go.opentelemetry.io/otel/sdk/metric v1.35.0/go.mod h1:is6XYCUMpcKi+ZsOvfluY5YstFnhW0BidkR+gL+qN+w=
+go.opentelemetry.io/otel/sdk/metric v1.44.0/go.mod h1:5B5pMARnXxKhltooO4xUuCBorl65a4EpnTalObqOigA=
-go.opentelemetry.io/otel/trace v1.41.0 h1:Vbk2co6bhj8L59ZJ6/xFTskY+tGAbOnCtQGVVa9TIN0=
+go.opentelemetry.io/otel/trace v1.44.0 h1:jxF5CsGYCe74MCRx2X4g7WsY/VBKRqqpNvXlX/6gtIk=
-go.opentelemetry.io/otel/trace v1.41.0/go.mod h1:U1NU4ULCoxeDKc09yCWdWe+3QoyweJcISEVa1RBzOis=
+go.opentelemetry.io/otel/trace v1.44.0/go.mod h1:oLl1jrMQAVo6v3GAggN+1VH9VIz9iUSvW53sW1Q8PIE=
 go.uber.org/atomic v1.11.0 h1:ZvwS0R+56ePWxUNi+Atn9dWONBPp/AUETXlHW0DxSjE=
 go.uber.org/atomic v1.11.0/go.mod h1:LUxbIzbOniOlMKjJjyPfpl4v+PKK2cNJn91OQbhoJI0=
 go.yaml.in/yaml/v3 v3.0.4 h1:tfq32ie2Jv2UxXFdLJdh3jXuOzWiL1fo0bu/FbuKpbc=
 go.yaml.in/yaml/v3 v3.0.4/go.mod h1:DhzuOOF2ATzADvBadXxruRBLzYTpT36CKvDb3+aBEFg=
-golang.org/x/crypto v0.51.0 h1:IBPXwPfKxY7cWQZ38ZCIRPI50YLeevDLlLnyC5wRGTI=
+golang.org/x/crypto v0.54.0 h1:YLIA59K4fiNzHzjnZt2tUJQjQtUWfWbeHBqKtk3eScw=
-golang.org/x/crypto v0.51.0/go.mod h1:8AdwkbraGNABw2kOX6YFPs3WM22XqI4EXEd8g+x7Oc8=
+golang.org/x/crypto v0.54.0/go.mod h1:KWL8ny2AZdGR2cWmzeHrp2azQPGogOv+HeQaVEXC2dk=
 golang.org/x/exp v0.0.0-20231006140011-7918f672742d h1:jtJma62tbqLibJ5sFQz8bKtEM8rJBtfilJ2qTU199MI=
 golang.org/x/exp v0.0.0-20231006140011-7918f672742d/go.mod h1:ldy0pHrwJyGW56pPQzzkH36rKxoZW1tw7ZJpeKx+hdo=
-golang.org/x/net v0.53.0 h1:d+qAbo5L0orcWAr0a9JweQpjXF19LMXJE8Ey7hwOdUA=
+golang.org/x/net v0.56.0 h1:Rw8j/hFzGvJUZwNBXnAtf5sVDVt+65SK2C7IxCxZt5o=
-golang.org/x/net v0.53.0/go.mod h1:JvMuJH7rrdiCfbeHoo3fCQU24Lf5JJwT9W3sJFulfgs=
+golang.org/x/net v0.56.0/go.mod h1:D3Ku6r+V6JROoZK144D2XfMHFcMq/0zSfLelVTCFKec=
-golang.org/x/sync v0.20.0 h1:e0PTpb7pjO8GAtTs2dQ6jYa5BWYlMuX047Dco/pItO4=
+golang.org/x/sync v0.22.0 h1:SZjpbeLmrCk4xhRSZFNZW5gFUeCeFgjekvI/+gfScek=
-golang.org/x/sync v0.20.0/go.mod h1:9xrNwdLfx4jkKbNva9FpL6vEN7evnE43NNNJQ2LF3+0=
+golang.org/x/sync v0.22.0/go.mod h1:9xrNwdLfx4jkKbNva9FpL6vEN7evnE43NNNJQ2LF3+0=
 golang.org/x/sys v0.0.0-20190916202348-b4ddaad3f8a3/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20201204225414-ed752295db88/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20210616094352-59db8d763f22/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/sys v0.0.0-20210809222454-d867a43fc93e/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
+golang.org/x/sys v0.1.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/sys v0.6.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
-golang.org/x/sys v0.44.0 h1:ildZl3J4uzeKP07r2F++Op7E9B29JRUy+a27EibtBTQ=
+golang.org/x/sys v0.47.0 h1:o7XGOvZQCADBQQ4Y7VNq2dRWQR7JmOUW8Kxx4ZsNgWs=
-golang.org/x/sys v0.44.0/go.mod h1:4GL1E5IUh+htKOUEOaiffhrAeqysfVGipDYzABqnCmw=
+golang.org/x/sys v0.47.0/go.mod h1:4GL1E5IUh+htKOUEOaiffhrAeqysfVGipDYzABqnCmw=
-golang.org/x/term v0.43.0 h1:S4RLU2sB31O/NCl+zFN9Aru9A/Cq2aqKpTZJ6B+DwT4=
+golang.org/x/term v0.45.0 h1:NwWyBmoJCbfTHpxrWoZ9C6/VxOf7ic219I8xZZFdrf0=
-golang.org/x/term v0.43.0/go.mod h1:lrhlHNdQJHO+1qVYiHfFKVuVioJIheAc3fBSMFYEIsk=
+golang.org/x/term v0.45.0/go.mod h1:9aqxs0blBcrm/n0L9QW0aRVD+ktan8ssZromtqJC43w=
-golang.org/x/text v0.37.0 h1:Cqjiwd9eSg8e0QAkyCaQTNHFIIzWtidPahFWR83rTrc=
+golang.org/x/text v0.40.0 h1:Ub2Z6/xjgF1WrYQz2nuITOEegKFtiIy+rieRJ5lHZKs=
-golang.org/x/text v0.37.0/go.mod h1:a5sjxXGs9hsn/AJVwuElvCAo9v8QYLzvavO5z2PiM38=
+golang.org/x/text v0.40.0/go.mod h1:hpnzDAfGV753zIKo+wk3u1bVKCGPbrnF7+7LBF/UHVY=
 golang.org/x/time v0.15.0 h1:bbrp8t3bGUeFOx08pvsMYRTCVSMk89u4tKbNOZbp88U=
 golang.org/x/time v0.15.0/go.mod h1:Y4YMaQmXwGQZoFaVFk4YpCt4FLQMYKZe9oeV/f4MSno=
-golang.org/x/xerrors v0.0.0-20191204190536-9bdfabe68543/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
 gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
 gopkg.in/check.v1 v1.0.0-20201130134442-10cb98267c6c h1:Hei/4ADfdWqJk1ZMxUNpqntNwaWcugrBjAiHlqqRiVk=
 gopkg.in/check.v1 v1.0.0-20201130134442-10cb98267c6c/go.mod h1:JHkPIbrfpd72SG/EVd6muEfDQjcINNoR0C8j2r3qZ4Q=

internal/api/v1/proxy.go

@@ -162,7 +162,21 @@ func (h *ProxyHandler) handleVirtual(w http.ResponseWriter, r *http.Request) {
 
 	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 {
+		http.Error(w, err.Error(), http.StatusBadRequest)
+		return
+	}
+	if ok {
+		http.Redirect(w, r, loc, http.StatusFound)
+		return
+	}
+
 	body, contentType, err := h.virtualEngine.Fetch(r.Context(), *virt, path, proxyBaseURL)
+	if errors.Is(err, virtual.ErrNotFound) {
+		http.Error(w, "not found", http.StatusNotFound)
+		return
+	}
 	if err != nil {
 		slog.Error("virtual fetch failed", "virtual", virtualName, "path", path, "error", err)
 		http.Error(w, "bad gateway", http.StatusBadGateway)

internal/api/v2/objects.go

@@ -1,6 +1,8 @@
 package v2
 
 import (
+	"context"
+	"errors"
 	"fmt"
 	"net/http"
 	"strconv"
@@ -8,8 +10,14 @@ import (
 	"github.com/go-chi/chi/v5"
 
 	"git.unkin.net/unkin/artifactapi/internal/database"
+	"git.unkin.net/unkin/artifactapi/internal/proxy"
 )
 
+// Evictor drops a remote path from every cache layer.
+type Evictor interface {
+	Evict(ctx context.Context, remoteName, path string) error
+}
+
 type ObjectsHandler struct {
 	db *database.DB
 }
@@ -18,10 +26,13 @@ func NewObjectsHandler(db *database.DB) *ObjectsHandler {
 	return &ObjectsHandler{db: db}
 }
 
-func (h *ObjectsHandler) Routes() chi.Router {
+// Routes lists and evicts objects for remote repos; evictor serves the DELETE.
+func (h *ObjectsHandler) Routes(evictor Evictor) chi.Router {
 	r := chi.NewRouter()
 	r.Get("/", h.list)
-	r.Delete("/*", h.evict)
+	r.Delete("/*", func(w http.ResponseWriter, r *http.Request) {
+		evict(w, r, evictor)
+	})
 	return r
 }
 
@@ -51,7 +62,7 @@ func (h *ObjectsHandler) list(w http.ResponseWriter, r *http.Request) {
 	remoteName := chi.URLParam(r, "name")
 	limit, offset := pageBounds(r)
 
-	artifacts, err := h.db.ListArtifacts(r.Context(), remoteName, limit, offset)
+	artifacts, err := h.db.ListArtifacts(r.Context(), remoteName, r.URL.Query().Get("prefix"), limit, offset)
 	if err != nil {
 		http.Error(w, err.Error(), http.StatusInternalServerError)
 		return
@@ -82,11 +93,16 @@ func (h *ObjectsHandler) evictLocal(w http.ResponseWriter, r *http.Request) {
 	w.WriteHeader(http.StatusNoContent)
 }
 
-func (h *ObjectsHandler) evict(w http.ResponseWriter, r *http.Request) {
+func evict(w http.ResponseWriter, r *http.Request, evictor Evictor) {
 	remoteName := chi.URLParam(r, "name")
 	path := chi.URLParam(r, "*")
 
-	if err := h.db.DeleteArtifact(r.Context(), remoteName, path); err != nil {
+	if err := evictor.Evict(r.Context(), remoteName, path); err != nil {
+		var proxyErr *proxy.ProxyError
+		if errors.As(err, &proxyErr) {
+			http.Error(w, proxyErr.Message, proxyErr.Status)
+			return
+		}
 		http.Error(w, fmt.Sprintf("evict failed: %v", err), http.StatusInternalServerError)
 		return
 	}

internal/api/v2/objects_evict_test.go

@@ -0,0 +1,59 @@
+package v2
+
+import (
+	"context"
+	"errors"
+	"fmt"
+	"net/http"
+	"net/http/httptest"
+	"testing"
+
+	"github.com/go-chi/chi/v5"
+
+	"git.unkin.net/unkin/artifactapi/internal/proxy"
+)
+
+type fakeEvictor struct {
+	remote, path string
+	err          error
+}
+
+func (f *fakeEvictor) Evict(_ context.Context, remote, path string) error {
+	f.remote, f.path = remote, path
+	return f.err
+}
+
+func deleteObject(ev Evictor, path string) int {
+	router := chi.NewRouter()
+	router.Route("/remotes/{name}/objects", func(r chi.Router) {
+		r.Delete("/*", NewObjectsHandler(nil).Routes(ev).ServeHTTP)
+	})
+	w := httptest.NewRecorder()
+	router.ServeHTTP(w, httptest.NewRequest("DELETE", "/remotes/epel/objects/"+path, nil))
+	return w.Code
+}
+
+func TestRemoteEvictDelegatesToEvictor(t *testing.T) {
+	for _, path := range []string{"8/Everything/x86_64/repodata/repomd.xml", "8/Everything/x86_64/repodata/*"} {
+		ev := &fakeEvictor{}
+		if code := deleteObject(ev, path); code != 204 || ev.remote != "epel" || ev.path != path {
+			t.Errorf("DELETE %s: code=%d evicted=%q/%q", path, code, ev.remote, ev.path)
+		}
+	}
+}
+
+func TestRemoteEvictMapsErrorStatus(t *testing.T) {
+	for name, tc := range map[string]struct {
+		err  error
+		want int
+	}{
+		"bad wildcard":   {&proxy.ProxyError{Status: http.StatusBadRequest, Message: "wildcard evict must be <dir>/*"}, http.StatusBadRequest},
+		"unknown remote": {&proxy.ProxyError{Status: http.StatusNotFound, Message: "remote not found"}, http.StatusNotFound},
+		"lock busy":      {fmt.Errorf("wrapped: %w", &proxy.ProxyError{Status: http.StatusServiceUnavailable, Message: "retry"}), http.StatusServiceUnavailable},
+		"other error":    {errors.New("db down"), http.StatusInternalServerError},
+	} {
+		if code := deleteObject(&fakeEvictor{err: tc.err}, "x"); code != tc.want {
+			t.Errorf("%s: code = %d, want %d", name, code, tc.want)
+		}
+	}
+}

internal/api/v2/objects_test.go

@@ -0,0 +1,68 @@
+package v2
+
+import (
+	"context"
+	"encoding/json"
+	"net/http/httptest"
+	"testing"
+
+	"github.com/go-chi/chi/v5"
+
+	"git.unkin.net/unkin/artifactapi/internal/database"
+	"git.unkin.net/unkin/artifactapi/pkg/models"
+)
+
+// TestObjectsListPrefix verifies the remote objects listing passes ?prefix=
+// through to the database filter.
+func TestObjectsListPrefix(t *testing.T) {
+	if testDSN == "" {
+		t.Skip("Docker unavailable")
+	}
+	ctx := context.Background()
+	db, err := database.New(testDSN)
+	if err != nil {
+		t.Fatal(err)
+	}
+	defer db.Close()
+
+	const remote = "generic-objs-prefix"
+	if err := db.CreateRemote(ctx, &models.Remote{
+		Name: remote, PackageType: models.PackageGeneric, RepoType: models.RepoTypeRemote,
+		BaseURL: "https://example.com", MutableTTL: 3600,
+	}); err != nil {
+		t.Fatal(err)
+	}
+	const hash = "sha256:bb22"
+	if err := db.UpsertBlob(ctx, hash, "blobs/bb/22", 10, "text/plain"); err != nil {
+		t.Fatal(err)
+	}
+	for _, p := range []string{"a/one.txt", "b/two.txt"} {
+		if err := db.UpsertArtifact(ctx, remote, p, hash, ""); err != nil {
+			t.Fatal(err)
+		}
+	}
+
+	router := chi.NewRouter()
+	router.Mount("/remotes/{name}/objects", NewObjectsHandler(db).Routes(&fakeEvictor{}))
+
+	list := func(query string) []models.Artifact {
+		t.Helper()
+		w := httptest.NewRecorder()
+		router.ServeHTTP(w, httptest.NewRequest("GET", "/remotes/"+remote+"/objects"+query, nil))
+		if w.Code != 200 {
+			t.Fatalf("list%s = %d, want 200", query, w.Code)
+		}
+		var got []models.Artifact
+		if err := json.Unmarshal(w.Body.Bytes(), &got); err != nil {
+			t.Fatalf("decode: %v", err)
+		}
+		return got
+	}
+
+	if got := list(""); len(got) != 2 {
+		t.Fatalf("unfiltered listing returned %d objects, want 2", len(got))
+	}
+	if got := list("?prefix=b/"); len(got) != 1 || got[0].Path != "b/two.txt" {
+		t.Fatalf("prefix=b/ listing = %+v, want only b/two.txt", got)
+	}
+}

internal/cache/cache_test.go

@@ -131,3 +131,72 @@ func TestFlushRemote(t *testing.T) {
 		t.Error("expected keys flushed")
 	}
 }
+
+func setPathKeys(t *testing.T, remote string, paths ...string) {
+	t.Helper()
+	ctx := context.Background()
+	for _, p := range paths {
+		if err := testRedis.SetTTL(ctx, remote, p, time.Minute); err != nil {
+			t.Fatal(err)
+		}
+		if err := testRedis.SetETag(ctx, remote, p, `"e"`, time.Minute); err != nil {
+			t.Fatal(err)
+		}
+	}
+}
+
+func pathKeysExist(t *testing.T, remote, path string) (ttl, etag bool) {
+	t.Helper()
+	ctx := context.Background()
+	ttl, _ = testRedis.CheckTTL(ctx, remote, path)
+	e, _ := testRedis.GetETag(ctx, remote, path)
+	return ttl, e != ""
+}
+
+func TestForgetPath(t *testing.T) {
+	requireRedis(t)
+	const meta = `repo/a*b?[c]\d.xml`
+	setPathKeys(t, "fp", meta, "repo/aXb.xml")
+	setPathKeys(t, "fp-other", meta)
+
+	if err := testRedis.ForgetPath(context.Background(), "fp", meta); err != nil {
+		t.Fatal(err)
+	}
+	if ttl, etag := pathKeysExist(t, "fp", meta); ttl || etag {
+		t.Errorf("forgotten path keys remain: ttl=%v etag=%v", ttl, etag)
+	}
+	for _, k := range [][2]string{{"fp", "repo/aXb.xml"}, {"fp-other", meta}} {
+		if ttl, etag := pathKeysExist(t, k[0], k[1]); !ttl || !etag {
+			t.Errorf("%s:%s lost keys: ttl=%v etag=%v", k[0], k[1], ttl, etag)
+		}
+	}
+}
+
+func TestForgetPrefix(t *testing.T) {
+	requireRedis(t)
+	const prefix = `r*[1]?\/`
+	under := []string{prefix + "repomd.xml", prefix + "sub/x.rpm"}
+	// Each would match the prefix if its glob metacharacters were left unescaped.
+	globMatches := []string{`rX11/repomd.xml`, `r[1]?\/x`, `r*1Z/x`}
+	setPathKeys(t, "fx", append(under, globMatches...)...)
+	setPathKeys(t, "fx-other", under...)
+
+	if err := testRedis.ForgetPrefix(context.Background(), "fx", prefix); err != nil {
+		t.Fatal(err)
+	}
+	for _, p := range under {
+		if ttl, etag := pathKeysExist(t, "fx", p); ttl || etag {
+			t.Errorf("%s keys remain: ttl=%v etag=%v", p, ttl, etag)
+		}
+	}
+	for _, p := range globMatches {
+		if ttl, etag := pathKeysExist(t, "fx", p); !ttl || !etag {
+			t.Errorf("%s outside prefix lost keys: ttl=%v etag=%v", p, ttl, etag)
+		}
+	}
+	for _, p := range under {
+		if ttl, etag := pathKeysExist(t, "fx-other", p); !ttl || !etag {
+			t.Errorf("other remote %s lost keys: ttl=%v etag=%v", p, ttl, etag)
+		}
+	}
+}

internal/cache/redis.go

@@ -3,6 +3,7 @@ package cache
 import (
 	"context"
 	"fmt"
+	"strings"
 	"time"
 
 	"github.com/redis/go-redis/v9"
@@ -115,3 +116,27 @@ func (r *Redis) FlushRemote(ctx context.Context, remote string) error {
 	}
 	return iter.Err()
 }
+
+// ForgetPath drops the freshness and ETag keys of one cached path.
+func (r *Redis) ForgetPath(ctx context.Context, remote, path string) error {
+	return r.client.Del(ctx, fmt.Sprintf("ttl:%s:%s", remote, path), fmt.Sprintf("etag:%s:%s", remote, path)).Err()
+}
+
+// ForgetPrefix drops the freshness and ETag keys of every cached path under prefix.
+func (r *Redis) ForgetPrefix(ctx context.Context, remote, prefix string) error {
+	glob := globEscaper.Replace(remote + ":" + prefix)
+	for _, kind := range []string{"ttl:", "etag:"} {
+		iter := r.client.Scan(ctx, 0, kind+glob+"*", 100).Iterator()
+		for iter.Next(ctx) {
+			if err := r.client.Del(ctx, iter.Val()).Err(); err != nil {
+				return err
+			}
+		}
+		if err := iter.Err(); err != nil {
+			return err
+		}
+	}
+	return nil
+}
+
+var globEscaper = strings.NewReplacer(`\`, `\\`, `*`, `\*`, `?`, `\?`, `[`, `\[`, `]`, `\]`)

internal/database/artifacts.go

@@ -65,7 +65,8 @@ func (db *DB) TouchArtifactAccess(ctx context.Context, remoteName, path string)
 	return err
 }
 
-func (db *DB) ListArtifacts(ctx context.Context, remoteName string, limit, offset int) ([]models.Artifact, error) {
+// ListArtifacts pages a remote's artifacts whose path starts with prefix ("" lists all).
+func (db *DB) ListArtifacts(ctx context.Context, remoteName, prefix string, limit, offset int) ([]models.Artifact, error) {
 	rows, err := db.Pool.Query(ctx, `
 		SELECT a.id, a.remote_name, a.path, a.content_hash, a.upstream_etag,
 			a.upstream_last_modified, a.first_seen_at, a.last_fetched_at,
@@ -73,10 +74,10 @@ func (db *DB) ListArtifacts(ctx context.Context, remoteName string, limit, offse
 			b.size_bytes, b.content_type
 		FROM artifacts a
 		JOIN blobs b ON a.content_hash = b.content_hash
-		WHERE a.remote_name = $1
+		WHERE a.remote_name = $1 AND left(a.path, length($2)) = $2
 		ORDER BY a.path
-		LIMIT $2 OFFSET $3
+		LIMIT $3 OFFSET $4
-	`, remoteName, limit, offset)
+	`, remoteName, prefix, limit, offset)
 	if err != nil {
 		return nil, err
 	}
@@ -103,6 +104,13 @@ func (db *DB) DeleteArtifact(ctx context.Context, remoteName, path string) error
 	return err
 }
 
+// DeleteArtifactsByPrefix removes every artifact row of a remote whose path
+// starts with prefix.
+func (db *DB) DeleteArtifactsByPrefix(ctx context.Context, remoteName, prefix string) error {
+	_, err := db.Pool.Exec(ctx, `DELETE FROM artifacts WHERE remote_name = $1 AND left(path, length($2)) = $2`, remoteName, prefix)
+	return err
+}
+
 func (db *DB) InsertAccessLog(ctx context.Context, remoteName, path string, cacheHit bool, sizeBytes int64, upstreamMS int, clientIP string) error {
 	_, err := db.Pool.Exec(ctx, `
 		INSERT INTO access_log (remote_name, path, cache_hit, size_bytes, upstream_ms, client_ip)

internal/database/database_test.go

@@ -168,10 +168,17 @@ func TestArtifactsAndBlobs(t *testing.T) {
 	if err := testDB.TouchArtifactAccess(ctx(), "r-art", "path/a.txt"); err != nil {
 		t.Fatal(err)
 	}
-	arts, err := testDB.ListArtifacts(ctx(), "r-art", 10, 0)
+	if err := testDB.UpsertArtifact(ctx(), "r-art", "other/b.txt", hash, ""); err != nil {
-	if err != nil || len(arts) != 1 {
+		t.Fatal(err)
+	}
+	arts, err := testDB.ListArtifacts(ctx(), "r-art", "", 10, 0)
+	if err != nil || len(arts) != 2 {
 		t.Fatalf("list artifacts: %v %v", len(arts), err)
 	}
+	arts, err = testDB.ListArtifacts(ctx(), "r-art", "path/", 10, 0)
+	if err != nil || len(arts) != 1 || arts[0].Path != "path/a.txt" {
+		t.Fatalf("list artifacts with prefix: %+v %v", arts, err)
+	}
 	if err := testDB.InsertAccessLog(ctx(), "r-art", "path/a.txt", true, 10, 5, "1.2.3.4"); err != nil {
 		t.Fatal(err)
 	}
@@ -188,6 +195,45 @@ func TestArtifactsAndBlobs(t *testing.T) {
 	}
 }
 
+func TestListArtifactsPrefix(t *testing.T) {
+	requireDB(t)
+	seedRemote(t, "r-prefix")
+	seedBlob(t, "prefixhash")
+	for _, p := range []string{"a%b/y", "a1b/y", "a_b/x", "aXb/x", "pkg/1", "pkg/2", "pkg/3", "pkgx/4"} {
+		if err := testDB.UpsertArtifact(ctx(), "r-prefix", p, "sha256:prefixhash", ""); err != nil {
+			t.Fatal(err)
+		}
+	}
+	paths := func(prefix string, limit, offset int) []string {
+		t.Helper()
+		arts, err := testDB.ListArtifacts(ctx(), "r-prefix", prefix, limit, offset)
+		if err != nil {
+			t.Fatalf("list %q: %v", prefix, err)
+		}
+		out := make([]string, len(arts))
+		for i, a := range arts {
+			out[i] = a.Path
+		}
+		return out
+	}
+
+	// LIKE wildcards in the prefix must match literally.
+	if got := paths("a_b/", 10, 0); len(got) != 1 || got[0] != "a_b/x" {
+		t.Fatalf("prefix a_b/ = %v, want [a_b/x]", got)
+	}
+	if got := paths("a%", 10, 0); len(got) != 1 || got[0] != "a%b/y" {
+		t.Fatalf("prefix a%% = %v, want [a%%b/y]", got)
+	}
+
+	// limit/offset page the filtered set, not the whole remote.
+	if got := paths("pkg/", 2, 0); len(got) != 2 || got[0] != "pkg/1" || got[1] != "pkg/2" {
+		t.Fatalf("prefix pkg/ page 1 = %v, want [pkg/1 pkg/2]", got)
+	}
+	if got := paths("pkg/", 2, 2); len(got) != 1 || got[0] != "pkg/3" {
+		t.Fatalf("prefix pkg/ page 2 = %v, want [pkg/3]", got)
+	}
+}
+
 func TestOrphanAndColdCleanup(t *testing.T) {
 	requireDB(t)
 	seedBlob(t, "orphanhash")
@@ -320,7 +366,7 @@ func TestDatabaseErrorPaths(t *testing.T) {
 	if _, err := bad.ListVirtuals(ctx); err == nil {
 		t.Error("ListVirtuals should error")
 	}
-	if _, err := bad.ListArtifacts(ctx, "r", 10, 0); err == nil {
+	if _, err := bad.ListArtifacts(ctx, "r", "", 10, 0); err == nil {
 		t.Error("ListArtifacts should error")
 	}
 	if _, err := bad.ListLocalFiles(ctx, "r", 10, 0); err == nil {

internal/database/migrations_test.go

@@ -0,0 +1,162 @@
+package database
+
+import (
+	"context"
+	"io/fs"
+	"maps"
+	"os"
+	"path/filepath"
+	"regexp"
+	"slices"
+	"strings"
+	"testing"
+
+	"git.unkin.net/unkin/golib/pg"
+
+	"git.unkin.net/unkin/artifactapi/migrations"
+)
+
+// migrationsDir is the repo's migrations/ directory, relative to this package.
+const migrationsDir = "../../migrations"
+
+func readMigrationsFromDisk(t *testing.T) map[string]string {
+	t.Helper()
+	entries, err := os.ReadDir(migrationsDir)
+	if err != nil {
+		t.Fatalf("read %s: %v", migrationsDir, err)
+	}
+	files := map[string]string{}
+	for _, e := range entries {
+		if e.IsDir() || !strings.HasSuffix(e.Name(), ".sql") {
+			continue
+		}
+		b, err := os.ReadFile(filepath.Join(migrationsDir, e.Name()))
+		if err != nil {
+			t.Fatalf("read %s: %v", e.Name(), err)
+		}
+		files[e.Name()] = string(b)
+	}
+	if len(files) == 0 {
+		t.Fatalf("no .sql files in %s", migrationsDir)
+	}
+	return files
+}
+
+// The embedded set is the shipped schema, so it must match the migrations/
+// directory exactly — a file added on disk but not embedded would never run.
+func TestEmbeddedMigrationsMatchDirectory(t *testing.T) {
+	onDisk := readMigrationsFromDisk(t)
+	entries, err := fs.ReadDir(migrations.FS, ".")
+	if err != nil {
+		t.Fatalf("read embedded migrations: %v", err)
+	}
+	embedded := map[string]string{}
+	for _, e := range entries {
+		if e.IsDir() || !strings.HasSuffix(e.Name(), ".sql") {
+			continue
+		}
+		b, err := migrations.FS.ReadFile(e.Name())
+		if err != nil {
+			t.Fatalf("read embedded %s: %v", e.Name(), err)
+		}
+		embedded[e.Name()] = string(b)
+	}
+	if len(embedded) != len(onDisk) {
+		t.Fatalf("embedded %d files, migrations/ has %d", len(embedded), len(onDisk))
+	}
+	for name, body := range embedded {
+		want, ok := onDisk[name]
+		if !ok {
+			t.Errorf("%s is embedded but not in migrations/", name)
+			continue
+		}
+		if body != want {
+			t.Errorf("%s: embedded body differs from migrations/%s", name, name)
+		}
+	}
+}
+
+var (
+	createTableRe = regexp.MustCompile(`(?i)\bCREATE\s+TABLE\b(\s+IF\s+NOT\s+EXISTS\b)?`)
+	createIndexRe = regexp.MustCompile(`(?i)\bCREATE\s+(UNIQUE\s+)?INDEX\b(\s+IF\s+NOT\s+EXISTS\b)?`)
+	addColumnRe   = regexp.MustCompile(`(?i)\bADD\s+COLUMN\b(\s+IF\s+NOT\s+EXISTS\b)?`)
+	destructiveRe = regexp.MustCompile(`(?i)\b(DROP\s+(TABLE|COLUMN|INDEX)|TRUNCATE|DELETE\s+FROM)\b`)
+)
+
+// A migration absent from schema_migrations is re-run even when the live
+// database already has the schema, which is exactly how the deployed database —
+// migrated for years by an untracked inline DDL blob — picks 0001 up. Every
+// statement must therefore be idempotent, or that first tracked run would fail
+// against production.
+func TestMigrationsAreIdempotent(t *testing.T) {
+	for name, body := range readMigrationsFromDisk(t) {
+		for _, m := range createTableRe.FindAllStringSubmatch(body, -1) {
+			if m[1] == "" {
+				t.Errorf("%s: %q is not IF NOT EXISTS-guarded", name, strings.Join(strings.Fields(m[0]), " "))
+			}
+		}
+		for _, m := range createIndexRe.FindAllStringSubmatch(body, -1) {
+			if m[2] == "" {
+				t.Errorf("%s: %q is not IF NOT EXISTS-guarded", name, strings.Join(strings.Fields(m[0]), " "))
+			}
+		}
+		for _, m := range addColumnRe.FindAllStringSubmatch(body, -1) {
+			if m[1] == "" {
+				t.Errorf("%s: %q is not IF NOT EXISTS-guarded", name, strings.Join(strings.Fields(m[0]), " "))
+			}
+		}
+		if loc := destructiveRe.FindString(body); loc != "" {
+			t.Errorf("%s: destructive statement %q; migrations are additive", name, loc)
+		}
+	}
+}
+
+// The deployed database was built by the untracked inline DDL this runner
+// replaces, so its very first tracked start runs 0001 against a schema that
+// already exists. Reproduce that by dropping the tracking row from an
+// already-migrated database and starting again: it must succeed and re-record
+// the version, changing nothing else.
+func TestMigratingAnAlreadyPopulatedSchemaIsANoOp(t *testing.T) {
+	requireDB(t)
+	c := context.Background()
+
+	if _, err := testDB.Pool.Exec(c, "DELETE FROM schema_migrations"); err != nil {
+		t.Fatalf("clear schema_migrations: %v", err)
+	}
+	db, err := New(testDSN)
+	if err != nil {
+		t.Fatalf("migrate over an existing schema: %v", err)
+	}
+	defer db.Close()
+
+	var versions []string
+	rows, err := db.Pool.Query(c, "SELECT version FROM schema_migrations ORDER BY version")
+	if err != nil {
+		t.Fatalf("read schema_migrations: %v", err)
+	}
+	defer rows.Close()
+	for rows.Next() {
+		var v string
+		if err := rows.Scan(&v); err != nil {
+			t.Fatalf("scan version: %v", err)
+		}
+		versions = append(versions, v)
+	}
+	if err := rows.Err(); err != nil {
+		t.Fatalf("read schema_migrations: %v", err)
+	}
+
+	want := slices.Sorted(maps.Keys(readMigrationsFromDisk(t)))
+	if !slices.Equal(versions, want) {
+		t.Fatalf("schema_migrations = %v, want %v", versions, want)
+	}
+}
+
+// The advisory lock key is derived from migrationLockName by golib. Pin it so a
+// rename cannot silently let two builds migrate the same cluster at once.
+func TestMigrationLockKeyIsPinned(t *testing.T) {
+	const wantKey int64 = -6981019939451326383
+	if got := pg.LockKey(migrationLockName); got != wantKey {
+		t.Fatalf("LockKey(%q) = %d, want %d", migrationLockName, got, wantKey)
+	}
+}

internal/database/postgres.go

@@ -2,249 +2,34 @@ package database
 
 import (
 	"context"
-	"fmt"
 
 	"github.com/jackc/pgx/v5/pgxpool"
+
+	"git.unkin.net/unkin/golib/pg"
+
+	"git.unkin.net/unkin/artifactapi/migrations"
 )
 
+// migrationLockName names the cluster-wide advisory lock the migration run
+// contends for; golib derives the key as FNV-1a/64 of it. Replicas starting
+// together queue on it instead of racing each other through the DDL.
+const migrationLockName = "artifactapi-migrations"
+
 type DB struct {
 	Pool *pgxpool.Pool
 }
 
 func New(dsn string) (*DB, error) {
-	pool, err := pgxpool.New(context.Background(), dsn)
+	ctx := context.Background()
+	pool, err := pg.NewMigrated(ctx, dsn, migrations.FS, pg.MigrateOptions{
+		LockName: migrationLockName,
+	})
 	if err != nil {
-		return nil, fmt.Errorf("connect to postgres: %w", err)
+		return nil, err
 	}
-
+	return &DB{Pool: pool}, nil
-	if err := pool.Ping(context.Background()); err != nil {
-		pool.Close()
-		return nil, fmt.Errorf("ping postgres: %w", err)
-	}
-
-	db := &DB{Pool: pool}
-	if err := db.migrate(); err != nil {
-		pool.Close()
-		return nil, fmt.Errorf("run migrations: %w", err)
-	}
-
-	return db, nil
 }
 
 func (db *DB) Close() {
 	db.Pool.Close()
 }
-
-func (db *DB) migrate() error {
-	ctx := context.Background()
-
-	_, err := db.Pool.Exec(ctx, `
-		CREATE TABLE IF NOT EXISTS remotes (
-			name            TEXT PRIMARY KEY,
-			package_type    TEXT NOT NULL,
-			repo_type       TEXT DEFAULT 'remote',
-			base_url        TEXT NOT NULL DEFAULT '',
-			mirrorlist      TEXT[] DEFAULT '{}',
-			mirror_strategy TEXT NOT NULL DEFAULT 'round_robin',
-			description     TEXT DEFAULT '',
-			username        TEXT DEFAULT '',
-			password        TEXT DEFAULT '',
-			immutable_ttl   INTEGER DEFAULT 0,
-			mutable_ttl     INTEGER DEFAULT 3600,
-			check_mutable   BOOLEAN DEFAULT TRUE,
-			patterns            TEXT[] DEFAULT '{}',
-			blocklist           TEXT[] DEFAULT '{}',
-			mutable_patterns    TEXT[] DEFAULT '{}',
-			immutable_patterns  TEXT[] DEFAULT '{}',
-			ban_tags_enabled    BOOLEAN DEFAULT FALSE,
-			ban_tags            TEXT[] DEFAULT '{}',
-			quarantine_enabled  BOOLEAN DEFAULT FALSE,
-			quarantine_days     INTEGER DEFAULT 3,
-			stale_on_error      BOOLEAN DEFAULT TRUE,
-			releases_remote     TEXT DEFAULT '',
-			managed_by          TEXT DEFAULT '',
-			created_at      TIMESTAMPTZ DEFAULT NOW(),
-			updated_at      TIMESTAMPTZ DEFAULT NOW()
-		);
-
-		CREATE TABLE IF NOT EXISTS virtuals (
-			name            TEXT PRIMARY KEY,
-			package_type    TEXT NOT NULL,
-			description     TEXT DEFAULT '',
-			members         TEXT[] NOT NULL,
-			managed_by      TEXT DEFAULT '',
-			created_at      TIMESTAMPTZ DEFAULT NOW(),
-			updated_at      TIMESTAMPTZ DEFAULT NOW()
-		);
-
-		CREATE TABLE IF NOT EXISTS blobs (
-			content_hash    TEXT PRIMARY KEY,
-			s3_key          TEXT NOT NULL,
-			size_bytes      BIGINT NOT NULL,
-			content_type    TEXT DEFAULT 'application/octet-stream',
-			created_at      TIMESTAMPTZ DEFAULT NOW()
-		);
-
-		CREATE TABLE IF NOT EXISTS artifacts (
-			id              BIGSERIAL PRIMARY KEY,
-			remote_name     TEXT NOT NULL REFERENCES remotes(name) ON DELETE CASCADE,
-			path            TEXT NOT NULL,
-			content_hash    TEXT NOT NULL REFERENCES blobs(content_hash),
-			upstream_etag   TEXT DEFAULT '',
-			upstream_last_modified TIMESTAMPTZ,
-			first_seen_at   TIMESTAMPTZ DEFAULT NOW(),
-			last_fetched_at TIMESTAMPTZ DEFAULT NOW(),
-			last_accessed_at TIMESTAMPTZ DEFAULT NOW(),
-			fetch_count     BIGINT DEFAULT 1,
-			access_count    BIGINT DEFAULT 1,
-			UNIQUE(remote_name, path)
-		);
-
-		CREATE INDEX IF NOT EXISTS idx_artifacts_remote ON artifacts(remote_name);
-		CREATE INDEX IF NOT EXISTS idx_artifacts_last_accessed ON artifacts(last_accessed_at);
-
-		CREATE TABLE IF NOT EXISTS local_files (
-			id              BIGSERIAL PRIMARY KEY,
-			repo_name       TEXT NOT NULL,
-			file_path       TEXT NOT NULL,
-			content_hash    TEXT NOT NULL REFERENCES blobs(content_hash),
-			created_at      TIMESTAMPTZ DEFAULT NOW(),
-			UNIQUE(repo_name, file_path)
-		);
-
-		CREATE TABLE IF NOT EXISTS access_log (
-			id              BIGSERIAL PRIMARY KEY,
-			remote_name     TEXT NOT NULL,
-			path            TEXT NOT NULL,
-			cache_hit       BOOLEAN NOT NULL,
-			size_bytes      BIGINT DEFAULT 0,
-			upstream_ms     INTEGER DEFAULT 0,
-			client_ip       TEXT DEFAULT '',
-			created_at      TIMESTAMPTZ DEFAULT NOW()
-		);
-
-		CREATE INDEX IF NOT EXISTS idx_access_log_remote_time ON access_log(remote_name, created_at);
-
-		ALTER TABLE remotes ADD COLUMN IF NOT EXISTS repo_type TEXT DEFAULT 'remote';
-		ALTER TABLE remotes ADD COLUMN IF NOT EXISTS mirrorlist TEXT[] DEFAULT '{}';
-		ALTER TABLE remotes ADD COLUMN IF NOT EXISTS mirror_strategy TEXT NOT NULL DEFAULT 'round_robin';
-		ALTER TABLE remotes ADD COLUMN IF NOT EXISTS upstream_dial_timeout INTEGER DEFAULT 0;
-		ALTER TABLE remotes ADD COLUMN IF NOT EXISTS upstream_tls_timeout INTEGER DEFAULT 0;
-		ALTER TABLE remotes ADD COLUMN IF NOT EXISTS upstream_response_header_timeout INTEGER DEFAULT 0;
-
-		CREATE TABLE IF NOT EXISTS rpm_metadata (
-			id              BIGSERIAL PRIMARY KEY,
-			repo_name       TEXT NOT NULL,
-			file_path       TEXT NOT NULL,
-			content_hash    TEXT NOT NULL,
-			name            TEXT NOT NULL,
-			epoch           INTEGER DEFAULT 0,
-			version         TEXT NOT NULL,
-			release         TEXT NOT NULL,
-			arch            TEXT NOT NULL,
-			summary         TEXT DEFAULT '',
-			description     TEXT DEFAULT '',
-			rpm_size        BIGINT DEFAULT 0,
-			installed_size  BIGINT DEFAULT 0,
-			license         TEXT DEFAULT '',
-			vendor          TEXT DEFAULT '',
-			build_group     TEXT DEFAULT '',
-			build_host      TEXT DEFAULT '',
-			source_rpm      TEXT DEFAULT '',
-			url             TEXT DEFAULT '',
-			packager        TEXT DEFAULT '',
-			requires        JSONB DEFAULT '[]',
-			provides        JSONB DEFAULT '[]',
-			conflicts       JSONB DEFAULT '[]',
-			obsoletes       JSONB DEFAULT '[]',
-			files           JSONB DEFAULT '[]',
-			changelogs      JSONB DEFAULT '[]',
-			created_at      TIMESTAMPTZ DEFAULT NOW(),
-			UNIQUE(repo_name, file_path)
-		);
-
-		CREATE INDEX IF NOT EXISTS idx_rpm_metadata_repo ON rpm_metadata(repo_name);
-
-		ALTER TABLE rpm_metadata ADD COLUMN IF NOT EXISTS conflicts JSONB DEFAULT '[]';
-		ALTER TABLE rpm_metadata ADD COLUMN IF NOT EXISTS obsoletes JSONB DEFAULT '[]';
-
-		CREATE TABLE IF NOT EXISTS deb_metadata (
-			id              BIGSERIAL PRIMARY KEY,
-			repo_name       TEXT NOT NULL,
-			file_path       TEXT NOT NULL,
-			content_hash    TEXT NOT NULL,
-			name            TEXT NOT NULL,
-			version         TEXT NOT NULL,
-			architecture    TEXT NOT NULL,
-			control         TEXT NOT NULL,
-			size            BIGINT DEFAULT 0,
-			md5             TEXT DEFAULT '',
-			sha256          TEXT DEFAULT '',
-			created_at      TIMESTAMPTZ DEFAULT NOW(),
-			UNIQUE(repo_name, file_path)
-		);
-
-		CREATE INDEX IF NOT EXISTS idx_deb_metadata_repo ON deb_metadata(repo_name);
-
-		CREATE TABLE IF NOT EXISTS alpine_metadata (
-			id                BIGSERIAL PRIMARY KEY,
-			repo_name         TEXT NOT NULL,
-			file_path         TEXT NOT NULL,
-			content_hash      TEXT NOT NULL,
-			checksum          TEXT NOT NULL,
-			name              TEXT NOT NULL,
-			version           TEXT NOT NULL,
-			arch              TEXT NOT NULL,
-			download_size     BIGINT DEFAULT 0,
-			installed_size    BIGINT DEFAULT 0,
-			description       TEXT DEFAULT '',
-			url               TEXT DEFAULT '',
-			license           TEXT DEFAULT '',
-			origin            TEXT DEFAULT '',
-			maintainer        TEXT DEFAULT '',
-			build_time        BIGINT DEFAULT 0,
-			commit_hash       TEXT DEFAULT '',
-			provider_priority TEXT DEFAULT '',
-			depends           TEXT DEFAULT '',
-			provides          TEXT DEFAULT '',
-			install_if        TEXT DEFAULT '',
-			created_at        TIMESTAMPTZ DEFAULT NOW(),
-			UNIQUE(repo_name, file_path)
-		);
-
-		CREATE INDEX IF NOT EXISTS idx_alpine_metadata_repo ON alpine_metadata(repo_name);
-		CREATE INDEX IF NOT EXISTS idx_alpine_metadata_repo_arch ON alpine_metadata(repo_name, arch);
-
-		CREATE TABLE IF NOT EXISTS github_rpm_sync_state (
-			remote_name        TEXT PRIMARY KEY,
-			etag               TEXT DEFAULT '',
-			last_synced_at     TIMESTAMPTZ,
-			sync_lease_owner   TEXT DEFAULT '',
-			sync_lease_expires TIMESTAMPTZ
-		);
-
-		CREATE TABLE IF NOT EXISTS github_deb_sync_state (
-			remote_name        TEXT PRIMARY KEY,
-			etag               TEXT DEFAULT '',
-			last_synced_at     TIMESTAMPTZ,
-			sync_lease_owner   TEXT DEFAULT '',
-			sync_lease_expires TIMESTAMPTZ
-		);
-
-		CREATE TABLE IF NOT EXISTS github_alpine_sync_state (
-			remote_name        TEXT PRIMARY KEY,
-			etag               TEXT DEFAULT '',
-			last_synced_at     TIMESTAMPTZ,
-			sync_lease_owner   TEXT DEFAULT '',
-			sync_lease_expires TIMESTAMPTZ
-		);
-
-		CREATE TABLE IF NOT EXISTS signing_keys (
-			purpose             TEXT PRIMARY KEY,
-			private_key_armor   TEXT NOT NULL,
-			key_id              TEXT NOT NULL,
-			created_at          TIMESTAMPTZ DEFAULT NOW()
-		);
-	`)
-	return err
-}

internal/provider/cargo/cargo.go

@@ -0,0 +1,92 @@
+// Package cargo proxies a Cargo sparse registry (RFC 2789): mutable index
+// files plus immutable .crate downloads, with config.json synthesized so
+// cargo fetches crates back through artifactapi.
+package cargo
+
+import (
+	"context"
+	"encoding/json"
+	"net/http"
+	"net/url"
+	"strings"
+
+	"git.unkin.net/unkin/artifactapi/internal/auth"
+	"git.unkin.net/unkin/artifactapi/internal/provider"
+	"git.unkin.net/unkin/artifactapi/pkg/models"
+)
+
+func init() {
+	provider.Register(&Provider{})
+}
+
+const (
+	crateDir         = "crates/"
+	cratesIOIndex    = "index.crates.io"
+	cratesIODownload = "https://static.crates.io"
+)
+
+type Provider struct{}
+
+func (p *Provider) Type() models.PackageType { return models.PackageCargo }
+
+func (p *Provider) Classify(path string) provider.Mutability {
+	if isCrate(path) {
+		return provider.Immutable
+	}
+	return provider.Mutable
+}
+
+func (p *Provider) ContentType(path string) string {
+	if isCrate(path) {
+		return "application/gzip"
+	}
+	if path == "config.json" {
+		return "application/json"
+	}
+	return "text/plain"
+}
+
+// UpstreamURL maps crates/{crate}/{crate}-{version}.crate to the download host
+// and everything else to the index. crates.io splits the two across hosts;
+// any other upstream is expected to serve both.
+func (p *Provider) UpstreamURL(remote models.Remote, path string) string {
+	path = strings.TrimLeft(path, "/")
+	base := strings.TrimRight(remote.BaseURL, "/")
+	if isCrate(path) {
+		if u, err := url.Parse(base); err == nil && u.Host == cratesIOIndex {
+			base = cratesIODownload
+		}
+	}
+	return base + "/" + path
+}
+
+func (p *Provider) RewriteResponse(_ []byte, _ models.Remote, _ string) ([]byte, error) {
+	return nil, nil
+}
+
+func (p *Provider) AuthHeaders(_ context.Context, remote models.Remote) (http.Header, error) {
+	return auth.BasicHeaders(remote), nil
+}
+
+// ServeRemote answers config.json itself: dl must name the requesting host,
+// which a cached upstream body cannot.
+func (p *Provider) ServeRemote(w http.ResponseWriter, r *http.Request, remote models.Remote, path, proxyBaseURL string, _ provider.RemoteMetadataStore) bool {
+	if strings.TrimLeft(path, "/") != "config.json" {
+		return false
+	}
+	w.Header().Set("Content-Type", "application/json")
+	_ = json.NewEncoder(w).Encode(Config(remote, proxyBaseURL))
+	return true
+}
+
+// Config builds the sparse registry config.json pointing downloads at proxyBaseURL.
+func Config(remote models.Remote, proxyBaseURL string) map[string]string {
+	return map[string]string{
+		"dl": strings.TrimRight(proxyBaseURL, "/") + "/api/v1/remote/" + remote.Name + "/" + crateDir + "{crate}/{crate}-{version}.crate",
+	}
+}
+
+func isCrate(path string) bool {
+	path = strings.TrimLeft(path, "/")
+	return strings.HasPrefix(path, crateDir) && strings.HasSuffix(path, ".crate")
+}

internal/provider/cargo/cargo_test.go

@@ -0,0 +1,75 @@
+package cargo
+
+import (
+	"encoding/json"
+	"net/http/httptest"
+	"testing"
+
+	"git.unkin.net/unkin/artifactapi/internal/provider"
+	"git.unkin.net/unkin/artifactapi/pkg/models"
+)
+
+func TestClassify(t *testing.T) {
+	p := &Provider{}
+	tests := []struct {
+		path string
+		want provider.Mutability
+	}{
+		{"crates/serde/serde-1.0.200.crate", provider.Immutable},
+		{"se/rd/serde", provider.Mutable},
+		{"1/a", provider.Mutable},
+		{"3/a/anyhow", provider.Mutable},
+		{"config.json", provider.Mutable},
+		{"cr/at/crates", provider.Mutable},
+	}
+	for _, tt := range tests {
+		if got := p.Classify(tt.path); got != tt.want {
+			t.Errorf("Classify(%q) = %v, want %v", tt.path, got, tt.want)
+		}
+	}
+}
+
+func TestUpstreamURL(t *testing.T) {
+	p := &Provider{}
+	cratesIO := models.Remote{BaseURL: "https://index.crates.io/"}
+	mirror := models.Remote{BaseURL: "http://mirror.example"}
+	tests := []struct {
+		remote     models.Remote
+		path, want string
+	}{
+		{cratesIO, "se/rd/serde", "https://index.crates.io/se/rd/serde"},
+		{cratesIO, "crates/serde/serde-1.0.200.crate", "https://static.crates.io/crates/serde/serde-1.0.200.crate"},
+		{mirror, "crates/serde/serde-1.0.200.crate", "http://mirror.example/crates/serde/serde-1.0.200.crate"},
+		{mirror, "/2/ab", "http://mirror.example/2/ab"},
+	}
+	for _, tt := range tests {
+		if got := p.UpstreamURL(tt.remote, tt.path); got != tt.want {
+			t.Errorf("UpstreamURL(%q, %q) = %q, want %q", tt.remote.BaseURL, tt.path, got, tt.want)
+		}
+	}
+}
+
+func TestServeRemoteConfig(t *testing.T) {
+	p := &Provider{}
+	remote := models.Remote{Name: "crates-io", BaseURL: "https://index.crates.io"}
+
+	w := httptest.NewRecorder()
+	if !p.ServeRemote(w, httptest.NewRequest("GET", "/", nil), remote, "config.json", "https://aa.example/", nil) {
+		t.Fatal("config.json not served")
+	}
+	var cfg map[string]string
+	if err := json.Unmarshal(w.Body.Bytes(), &cfg); err != nil {
+		t.Fatal(err)
+	}
+	want := "https://aa.example/api/v1/remote/crates-io/crates/{crate}/{crate}-{version}.crate"
+	if cfg["dl"] != want {
+		t.Errorf("dl = %q, want %q", cfg["dl"], want)
+	}
+	if _, ok := cfg["api"]; ok {
+		t.Error("api must be omitted: publishing through the proxy is unsupported")
+	}
+
+	if p.ServeRemote(httptest.NewRecorder(), httptest.NewRequest("GET", "/", nil), remote, "se/rd/serde", "https://aa.example", nil) {
+		t.Error("index files must fall through to the proxy engine")
+	}
+}

internal/proxy/BENCHMARKS.md

@@ -0,0 +1,162 @@
+# Mirror-selection benchmarks
+
+These benchmarks (`selection_bench_test.go`) isolate the **mirror load-balancing
+selection overhead** — no network, no DB, no Redis. They build a zero-value
+`Engine` and call `baseURLAttemptOrder` / `beginAttempt` / `endAttempt`
+directly, the same way `leastconn_test.go` and `multibaseurl_test.go` do.
+
+Goal: quantify how much latency the load-balancing strategy (`round_robin` vs
+`least_conn`) adds versus a plain single-URL remote, and give a permanent
+regression guard.
+
+## Key context: selection is cache-miss-only
+
+`baseURLAttemptOrder` is called from exactly three places — `headUpstream`,
+`fetchFromUpstream`, and `checkUpstream` — all on the **upstream / cache-miss
+path**. A cache hit returns `Source: "cache"` from `GetArtifact` / `store.Stat`
+*before* any selection code runs. So none of the numbers below apply to the hot
+cache-hit path: cache hits pay **zero** selection cost regardless of strategy.
+The overhead here is paid once per upstream fetch, alongside a network round-trip
+measured in milliseconds.
+
+## How to run
+
+```
+go test -run=^$ -bench='BaseURLAttemptOrder|BeginEndAttempt' -benchmem \
+  -benchtime=1s -count=6 -cpu=8 ./internal/proxy/
+```
+
+## Results
+
+Machine: AMD Ryzen 7 4700U (8 threads), linux/amd64, go1.26.5.
+`-benchtime=1s -count=6`; figures below are the **median of 6 runs**.
+
+### Sequential (single-goroutine)
+
+| Benchmark                        | ns/op  | B/op | allocs/op |
+|----------------------------------|-------:|-----:|----------:|
+| BaseURLAttemptOrder_SingleURL    |   ~133 |   16 |         1 |
+| BaseURLAttemptOrder_RoundRobin/3 |   ~462 |  120 |         4 |
+| BaseURLAttemptOrder_RoundRobin/8 |   ~682 |  280 |         4 |
+| BaseURLAttemptOrder_LeastConn/3  |  ~2690 |  474 |        22 |
+| BaseURLAttemptOrder_LeastConn/8  | ~15200 | 2688 |       132 |
+| BeginEndAttempt (gauge inc/dec)  |   ~514 |  104 |         4 |
+
+### Parallel (`RunParallel`, GOMAXPROCS=8) — ns/op is wall-time across 8 cores
+
+| Benchmark                                 | ns/op | B/op | allocs/op |
+|-------------------------------------------|------:|-----:|----------:|
+| BaseURLAttemptOrder_RoundRobin_Parallel/3 | ~67.5 |  120 |         4 |
+| BaseURLAttemptOrder_RoundRobin_Parallel/8 |  ~130 |  280 |         4 |
+| BaseURLAttemptOrder_LeastConn_Parallel/3  |  ~292 |  474 |        22 |
+| BaseURLAttemptOrder_LeastConn_Parallel/8  | ~1673 | 2688 |       132 |
+| BeginEndAttempt_Parallel                  | ~71.5 |  104 |         4 |
+
+## Reading the numbers
+
+- **Single-URL is a near-no-op** (~133 ns, 1 alloc): the `len(urls) <= 1`
+  early return just returns the pool slice. Every non-mirrored remote takes this
+  path.
+- **round_robin is cheap**: ~462 ns for a 3-mirror pool, ~682 ns for 8. Cost is
+  one atomic cursor increment plus building the rotated `[]string`. Allocs are
+  constant at 4 (the ordered slice + its backing string headers), size grows
+  with pool length.
+- **least_conn is more expensive and scales super-linearly**: ~2.7 µs / 22
+  allocs at 3 mirrors, ~15 µs / 132 allocs at 8. The cost is the per-call
+  `sort.SliceStable`, whose comparator calls `inflightCounter` (a
+  `sync.Map.LoadOrStore` with a `remoteName\x00url` string-concat key plus a
+  speculative `new(atomic.Int64)`) O(n·log n) times. That is where the alloc
+  count and the time come from — not the sort itself. A future optimization
+  could snapshot each mirror's load once before sorting; out of scope for this
+  measurement PR.
+- **beginAttempt/endAttempt** (~514 ns seq, ~72 ns parallel) is one
+  `LoadOrStore` + two atomic adds; it only runs for least_conn multi-mirror
+  remotes, once per upstream attempt.
+- **Under concurrency the atomics/sync.Map do not collapse**: every parallel
+  variant reports *lower* ns/op than its sequential twin because work spreads
+  across 8 cores (RunParallel reports aggregate wall-time-per-op). No contention
+  cliff on the shared rrCounters cursor, the inflight `sync.Map`, or the
+  per-mirror `atomic.Int64` gauges.
+
+## Verdict
+
+At the per-request scale that matters (a cache-miss that is *already* doing a
+multi-millisecond network fetch), even the worst case here — least_conn across 8
+mirrors at ~15 µs — is <1% of a single upstream round-trip, and round_robin
+(~0.5 µs) is negligible. The strategy adds no meaningful latency, and it adds
+**exactly zero** to the cache-hit hot path because selection never runs there.
+
+## Raw output (all 6 runs)
+
+```
+goos: linux
+goarch: amd64
+pkg: git.unkin.net/unkin/artifactapi/internal/proxy
+cpu: AMD Ryzen 7 4700U with Radeon Graphics
+BenchmarkBaseURLAttemptOrder_SingleURL-8             	 8635875	       138.4 ns/op	      16 B/op	       1 allocs/op
+BenchmarkBaseURLAttemptOrder_SingleURL-8             	 9673108	       126.7 ns/op	      16 B/op	       1 allocs/op
+BenchmarkBaseURLAttemptOrder_SingleURL-8             	 8001002	       147.3 ns/op	      16 B/op	       1 allocs/op
+BenchmarkBaseURLAttemptOrder_SingleURL-8             	11303490	       135.0 ns/op	      16 B/op	       1 allocs/op
+BenchmarkBaseURLAttemptOrder_SingleURL-8             	10125138	       132.0 ns/op	      16 B/op	       1 allocs/op
+BenchmarkBaseURLAttemptOrder_SingleURL-8             	 8025687	       130.1 ns/op	      16 B/op	       1 allocs/op
+BenchmarkBaseURLAttemptOrder_RoundRobin/pool3-8      	 2706013	       453.2 ns/op	     120 B/op	       4 allocs/op
+BenchmarkBaseURLAttemptOrder_RoundRobin/pool3-8      	 2498718	       444.4 ns/op	     120 B/op	       4 allocs/op
+BenchmarkBaseURLAttemptOrder_RoundRobin/pool3-8      	 2605516	       471.6 ns/op	     120 B/op	       4 allocs/op
+BenchmarkBaseURLAttemptOrder_RoundRobin/pool3-8      	 2799928	       487.6 ns/op	     120 B/op	       4 allocs/op
+BenchmarkBaseURLAttemptOrder_RoundRobin/pool3-8      	 2463375	       418.6 ns/op	     120 B/op	       4 allocs/op
+BenchmarkBaseURLAttemptOrder_RoundRobin/pool3-8      	 2472265	       474.3 ns/op	     120 B/op	       4 allocs/op
+BenchmarkBaseURLAttemptOrder_RoundRobin/pool8-8      	 1741789	       689.4 ns/op	     280 B/op	       4 allocs/op
+BenchmarkBaseURLAttemptOrder_RoundRobin/pool8-8      	 1775467	       602.1 ns/op	     280 B/op	       4 allocs/op
+BenchmarkBaseURLAttemptOrder_RoundRobin/pool8-8      	 1829398	       688.4 ns/op	     280 B/op	       4 allocs/op
+BenchmarkBaseURLAttemptOrder_RoundRobin/pool8-8      	 1781149	       679.3 ns/op	     280 B/op	       4 allocs/op
+BenchmarkBaseURLAttemptOrder_RoundRobin/pool8-8      	 1795680	       599.4 ns/op	     280 B/op	       4 allocs/op
+BenchmarkBaseURLAttemptOrder_RoundRobin/pool8-8      	 1739122	       684.5 ns/op	     280 B/op	       4 allocs/op
+BenchmarkBaseURLAttemptOrder_LeastConn/pool3-8       	  424184	      2675 ns/op	     474 B/op	      22 allocs/op
+BenchmarkBaseURLAttemptOrder_LeastConn/pool3-8       	  426796	      2498 ns/op	     474 B/op	      22 allocs/op
+BenchmarkBaseURLAttemptOrder_LeastConn/pool3-8       	  427116	      2716 ns/op	     474 B/op	      22 allocs/op
+BenchmarkBaseURLAttemptOrder_LeastConn/pool3-8       	  430540	      2681 ns/op	     474 B/op	      22 allocs/op
+BenchmarkBaseURLAttemptOrder_LeastConn/pool3-8       	  418156	      2700 ns/op	     474 B/op	      22 allocs/op
+BenchmarkBaseURLAttemptOrder_LeastConn/pool3-8       	  423009	      2711 ns/op	     474 B/op	      22 allocs/op
+BenchmarkBaseURLAttemptOrder_LeastConn/pool8-8       	  163642	     14007 ns/op	    2688 B/op	     132 allocs/op
+BenchmarkBaseURLAttemptOrder_LeastConn/pool8-8       	   78501	     15457 ns/op	    2688 B/op	     131 allocs/op
+BenchmarkBaseURLAttemptOrder_LeastConn/pool8-8       	   76380	     14928 ns/op	    2688 B/op	     132 allocs/op
+BenchmarkBaseURLAttemptOrder_LeastConn/pool8-8       	  183634	     16091 ns/op	    2688 B/op	     132 allocs/op
+BenchmarkBaseURLAttemptOrder_LeastConn/pool8-8       	   73809	     15561 ns/op	    2688 B/op	     132 allocs/op
+BenchmarkBaseURLAttemptOrder_LeastConn/pool8-8       	   74546	     13962 ns/op	    2688 B/op	     132 allocs/op
+BenchmarkBeginEndAttempt-8                           	 2350348	       519.7 ns/op	     104 B/op	       4 allocs/op
+BenchmarkBeginEndAttempt-8                           	 2321659	       514.0 ns/op	     104 B/op	       4 allocs/op
+BenchmarkBeginEndAttempt-8                           	 2284635	       438.0 ns/op	     104 B/op	       4 allocs/op
+BenchmarkBeginEndAttempt-8                           	 2287051	       513.9 ns/op	     104 B/op	       4 allocs/op
+BenchmarkBeginEndAttempt-8                           	 2286481	       520.3 ns/op	     104 B/op	       4 allocs/op
+BenchmarkBeginEndAttempt-8                           	 2837775	       512.9 ns/op	     104 B/op	       4 allocs/op
+BenchmarkBaseURLAttemptOrder_RoundRobin_Parallel/pool3-8         	16052568	        67.78 ns/op	     120 B/op	       4 allocs/op
+BenchmarkBaseURLAttemptOrder_RoundRobin_Parallel/pool3-8         	17452791	        66.07 ns/op	     120 B/op	       4 allocs/op
+BenchmarkBaseURLAttemptOrder_RoundRobin_Parallel/pool3-8         	17549858	        69.25 ns/op	     120 B/op	       4 allocs/op
+BenchmarkBaseURLAttemptOrder_RoundRobin_Parallel/pool3-8         	18845167	        64.55 ns/op	     120 B/op	       4 allocs/op
+BenchmarkBaseURLAttemptOrder_RoundRobin_Parallel/pool3-8         	16285608	        69.81 ns/op	     120 B/op	       4 allocs/op
+BenchmarkBaseURLAttemptOrder_RoundRobin_Parallel/pool3-8         	17382639	        67.12 ns/op	     120 B/op	       4 allocs/op
+BenchmarkBaseURLAttemptOrder_RoundRobin_Parallel/pool8-8         	 9734368	       120.6 ns/op	     280 B/op	       4 allocs/op
+BenchmarkBaseURLAttemptOrder_RoundRobin_Parallel/pool8-8         	10154736	       133.3 ns/op	     280 B/op	       4 allocs/op
+BenchmarkBaseURLAttemptOrder_RoundRobin_Parallel/pool8-8         	10061422	       131.8 ns/op	     280 B/op	       4 allocs/op
+BenchmarkBaseURLAttemptOrder_RoundRobin_Parallel/pool8-8         	10212364	       127.4 ns/op	     280 B/op	       4 allocs/op
+BenchmarkBaseURLAttemptOrder_RoundRobin_Parallel/pool8-8         	10259030	       132.5 ns/op	     280 B/op	       4 allocs/op
+BenchmarkBaseURLAttemptOrder_RoundRobin_Parallel/pool8-8         	10069576	       122.4 ns/op	     280 B/op	       4 allocs/op
+BenchmarkBaseURLAttemptOrder_LeastConn_Parallel/pool3-8          	 4288112	       292.7 ns/op	     474 B/op	      22 allocs/op
+BenchmarkBaseURLAttemptOrder_LeastConn_Parallel/pool3-8          	 4009249	       295.9 ns/op	     474 B/op	      22 allocs/op
+BenchmarkBaseURLAttemptOrder_LeastConn_Parallel/pool3-8          	 4176378	       291.3 ns/op	     474 B/op	      22 allocs/op
+BenchmarkBaseURLAttemptOrder_LeastConn_Parallel/pool3-8          	 4104871	       289.9 ns/op	     474 B/op	      22 allocs/op
+BenchmarkBaseURLAttemptOrder_LeastConn_Parallel/pool3-8          	 4245262	       296.4 ns/op	     474 B/op	      22 allocs/op
+BenchmarkBaseURLAttemptOrder_LeastConn_Parallel/pool3-8          	 4079778	       290.3 ns/op	     474 B/op	      22 allocs/op
+BenchmarkBaseURLAttemptOrder_LeastConn_Parallel/pool8-8          	  748200	      1636 ns/op	    2688 B/op	     132 allocs/op
+BenchmarkBaseURLAttemptOrder_LeastConn_Parallel/pool8-8          	  763029	      1653 ns/op	    2688 B/op	     132 allocs/op
+BenchmarkBaseURLAttemptOrder_LeastConn_Parallel/pool8-8          	  663717	      1772 ns/op	    2688 B/op	     132 allocs/op
+BenchmarkBaseURLAttemptOrder_LeastConn_Parallel/pool8-8          	  739677	      1676 ns/op	    2688 B/op	     132 allocs/op
+BenchmarkBaseURLAttemptOrder_LeastConn_Parallel/pool8-8          	  763148	      1669 ns/op	    2688 B/op	     132 allocs/op
+BenchmarkBaseURLAttemptOrder_LeastConn_Parallel/pool8-8          	  610597	      1684 ns/op	    2688 B/op	     132 allocs/op
+BenchmarkBeginEndAttempt_Parallel-8                              	17266058	        69.46 ns/op	     104 B/op	       4 allocs/op
+BenchmarkBeginEndAttempt_Parallel-8                              	17151303	        72.05 ns/op	     104 B/op	       4 allocs/op
+BenchmarkBeginEndAttempt_Parallel-8                              	16919542	        74.17 ns/op	     104 B/op	       4 allocs/op
+BenchmarkBeginEndAttempt_Parallel-8                              	16948015	        72.49 ns/op	     104 B/op	       4 allocs/op
+BenchmarkBeginEndAttempt_Parallel-8                              	16918693	        69.52 ns/op	     104 B/op	       4 allocs/op
+BenchmarkBeginEndAttempt_Parallel-8                              	17376012	        70.99 ns/op	     104 B/op	       4 allocs/op
+```

internal/proxy/engine.go

@@ -16,6 +16,8 @@ import (
 	"sync/atomic"
 	"time"
 
+	"github.com/jackc/pgx/v5"
+
 	"git.unkin.net/unkin/artifactapi/internal/cache"
 	"git.unkin.net/unkin/artifactapi/internal/database"
 	"git.unkin.net/unkin/artifactapi/internal/provider"
@@ -47,6 +49,8 @@ type Engine struct {
 	// mirror strategy to prefer the mirror currently handling the fewest
 	// requests. Per-replica and approximate, which is fine.
 	inflight sync.Map
+	// evictLockWait bounds how long Evict waits on a held fetch lock.
+	evictLockWait time.Duration
 }
 
 func NewEngine(db *database.DB, c *cache.Redis, s *storage.S3) *Engine {
@@ -57,6 +61,8 @@ func NewEngine(db *database.DB, c *cache.Redis, s *storage.S3) *Engine {
 		cas:       storage.NewCAS(s),
 		circuit:   NewCircuitBreaker(c),
 		accessLog: make(chan database.AccessLogEntry, accessLogBufferSize),
+
+		evictLockWait: fetchLockTTL,
 	}
 	go e.runAccessLogWriter()
 	return e
@@ -208,6 +214,71 @@ func (e *Engine) Fetch(ctx context.Context, remote models.Remote, path string, p
 	return result, nil
 }
 
+// Evict drops path from every cache layer (artifact row, index object, Redis
+// freshness and ETag keys) so the next request refetches from upstream. A
+// trailing "/*" evicts every path under that directory.
+func (e *Engine) Evict(ctx context.Context, remoteName, path string) error {
+	prefix, wildcard := strings.CutSuffix(path, "*")
+	if wildcard && !strings.HasSuffix(prefix, "/") {
+		return &ProxyError{Status: http.StatusBadRequest, Message: "wildcard evict must be <dir>/*"}
+	}
+	if _, err := e.db.GetRemote(ctx, remoteName); errors.Is(err, pgx.ErrNoRows) {
+		return &ProxyError{Status: http.StatusNotFound, Message: fmt.Sprintf("remote %q not found", remoteName)}
+	} else if err != nil {
+		return fmt.Errorf("get remote: %w", err)
+	}
+	if !wildcard {
+		if err := e.waitForLock(ctx, remoteName, path); err != nil {
+			return err
+		}
+		defer func() { _ = e.cache.ReleaseLock(context.WithoutCancel(ctx), remoteName, path) }()
+		if err := e.db.DeleteArtifact(ctx, remoteName, path); err != nil {
+			return fmt.Errorf("delete artifact: %w", err)
+		}
+		if err := e.store.Delete(ctx, storage.IndexKey(remoteName, path)); err != nil {
+			return fmt.Errorf("delete index: %w", err)
+		}
+		return e.cache.ForgetPath(ctx, remoteName, path)
+	}
+	// ponytail: no lock for wildcards; a Fetch already in flight under the
+	// prefix can re-cache its path after the evict. Per-path locks over a
+	// directory would close it if that ever matters.
+	if err := e.db.DeleteArtifactsByPrefix(ctx, remoteName, prefix); err != nil {
+		return fmt.Errorf("delete artifacts: %w", err)
+	}
+	if err := e.store.DeletePrefix(ctx, storage.IndexKey(remoteName, prefix)); err != nil {
+		return fmt.Errorf("delete indexes: %w", err)
+	}
+	return e.cache.ForgetPrefix(ctx, remoteName, prefix)
+}
+
+// waitForLock takes the per-path fetch lock so an in-flight Fetch cannot
+// re-set TTL/ETag keys after an evict. It fails with a 503 when the lock
+// cannot be taken within evictLockWait or Redis errors.
+func (e *Engine) waitForLock(ctx context.Context, remoteName, path string) error {
+	deadline := time.Now().Add(e.evictLockWait)
+	for {
+		ok, err := e.cache.AcquireLock(ctx, remoteName, path, fetchLockTTL)
+		if ok {
+			return nil
+		}
+		if ctx.Err() != nil {
+			return ctx.Err()
+		}
+		if err != nil {
+			return &ProxyError{Status: http.StatusServiceUnavailable, Message: fmt.Sprintf("fetch lock: %v", err)}
+		}
+		if time.Now().After(deadline) {
+			return &ProxyError{Status: http.StatusServiceUnavailable, Message: "fetch in progress, retry evict"}
+		}
+		select {
+		case <-ctx.Done():
+			return ctx.Err()
+		case <-time.After(50 * time.Millisecond):
+		}
+	}
+}
+
 // HeadResult carries artifact metadata for a HEAD request. There is no body.
 type HeadResult struct {
 	ContentType string
@@ -760,13 +831,41 @@ func (e *Engine) baseURLAttemptOrder(remote models.Remote) []string {
 		ordered[i] = urls[(start+i)%len(urls)]
 	}
 	if remote.MirrorStrategy == models.MirrorStrategyLeastConn {
-		sort.SliceStable(ordered, func(a, b int) bool {
+		// Snapshot each mirror's in-flight count once, then sort the snapshot.
-			return e.inflightCounter(remote.Name, ordered[a]).Load() < e.inflightCounter(remote.Name, ordered[b]).Load()
+		// Reading the gauge inside the comparator would repeat an allocating
+		// sync.Map lookup on every comparison (O(n log n) lookups); this is O(n).
+		snap := make([]inflightSnapshot, len(ordered))
+		for i, url := range ordered {
+			snap[i] = inflightSnapshot{url: url, count: e.inflightCount(remote.Name, url)}
+		}
+		sort.SliceStable(snap, func(a, b int) bool {
+			return snap[a].count < snap[b].count
 		})
+		for i := range snap {
+			ordered[i] = snap[i].url
+		}
 	}
 	return ordered
 }
 
+// inflightSnapshot pairs a mirror URL with its sampled in-flight count so the
+// least_conn sort compares plain ints instead of re-reading the gauge.
+type inflightSnapshot struct {
+	url   string
+	count int64
+}
+
+// inflightCount reads the in-flight request gauge for a given (remote, upstream
+// URL) without creating it, returning 0 when the counter is absent. This keeps
+// the selection read path allocation-free (plain Load, no LoadOrStore).
+func (e *Engine) inflightCount(remoteName, url string) int64 {
+	v, ok := e.inflight.Load(remoteName + "\x00" + url)
+	if !ok {
+		return 0
+	}
+	return v.(*atomic.Int64).Load()
+}
+
 // inflightCounter returns the shared in-flight request gauge for a given
 // (remote, upstream URL), creating it on first use.
 func (e *Engine) inflightCounter(remoteName, url string) *atomic.Int64 {

internal/proxy/evict_test.go

@@ -0,0 +1,271 @@
+package proxy
+
+import (
+	"context"
+	"errors"
+	"net/http"
+	"net/http/httptest"
+	"sync/atomic"
+	"testing"
+	"time"
+
+	_ "git.unkin.net/unkin/artifactapi/internal/provider/rpm"
+	"git.unkin.net/unkin/artifactapi/internal/storage"
+	"git.unkin.net/unkin/artifactapi/pkg/models"
+)
+
+// changingUpstream serves every path with the current revision, as a mirror
+// does after a sync replaces its repodata. It answers 304 to a matching
+// If-None-Match and counts conditional requests.
+func changingUpstream(t *testing.T) (*httptest.Server, *atomic.Value, *atomic.Int32) {
+	t.Helper()
+	var rev atomic.Value
+	var conditional atomic.Int32
+	rev.Store("rev1")
+	srv := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		v := rev.Load().(string)
+		etag := `"` + v + `"`
+		w.Header().Set("ETag", etag)
+		if inm := r.Header.Get("If-None-Match"); inm != "" {
+			conditional.Add(1)
+			if inm == etag {
+				w.WriteHeader(http.StatusNotModified)
+				return
+			}
+		}
+		_, _ = w.Write([]byte(v + ":" + r.URL.Path))
+	}))
+	t.Cleanup(srv.Close)
+	return srv, &rev, &conditional
+}
+
+func fetchBody(t *testing.T, r models.Remote, path string) string {
+	t.Helper()
+	res, err := testEngine.Fetch(context.Background(), r, path, prov(t, models.PackageRPM))
+	if err != nil {
+		t.Fatalf("fetch %s: %v", path, err)
+	}
+	return readAll(t, res)
+}
+
+func rpmRemote(t *testing.T, name, baseURL string) models.Remote {
+	return seed(t, models.Remote{Name: name, PackageType: models.PackageRPM, RepoType: models.RepoTypeRemote, BaseURL: baseURL, MutableTTL: 7200, CheckMutable: true})
+}
+
+// cached reports which cache layers hold path: artifact row, index object,
+// Redis TTL key, Redis ETag key.
+type cached struct{ row, index, ttl, etag bool }
+
+// Mutable indexes live in the S3 index; immutable blobs get an artifact row.
+var (
+	indexCached = cached{index: true, ttl: true, etag: true}
+	blobCached  = cached{row: true, ttl: true, etag: true}
+)
+
+func layers(t *testing.T, remote, path string) cached {
+	t.Helper()
+	ctx := context.Background()
+	var c cached
+	_, err := testDB.GetArtifact(ctx, remote, path)
+	c.row = err == nil
+	c.index, err = testEngine.store.Exists(ctx, storage.IndexKey(remote, path))
+	if err != nil {
+		t.Fatalf("stat index %s: %v", path, err)
+	}
+	c.ttl, _ = testCache.CheckTTL(ctx, remote, path)
+	etag, _ := testCache.GetETag(ctx, remote, path)
+	c.etag = etag != ""
+	return c
+}
+
+func TestEvictMutableIndexRefetches(t *testing.T) {
+	requireStack(t)
+	srv, rev, conditional := changingUpstream(t)
+	r := rpmRemote(t, "evict-idx", srv.URL)
+	const path = "8/Everything/x86_64/repodata/repomd.xml"
+
+	if got := fetchBody(t, r, path); got != "rev1:/"+path {
+		t.Fatalf("initial fetch = %q", got)
+	}
+	if c := layers(t, r.Name, path); c != indexCached {
+		t.Fatalf("before evict = %+v, want %+v", c, indexCached)
+	}
+	rev.Store("rev2")
+	if got := fetchBody(t, r, path); got != "rev1:/"+path {
+		t.Fatalf("within TTL = %q, want cached rev1", got)
+	}
+	if err := testEngine.Evict(context.Background(), r.Name, path); err != nil {
+		t.Fatalf("evict: %v", err)
+	}
+	if c := layers(t, r.Name, path); c != (cached{}) {
+		t.Fatalf("after evict = %+v, want every layer gone", c)
+	}
+	conditional.Store(0)
+	if got := fetchBody(t, r, path); got != "rev2:/"+path {
+		t.Fatalf("after evict = %q, want rev2", got)
+	}
+	if n := conditional.Load(); n != 0 {
+		t.Errorf("post-evict fetch revalidated with the evicted ETag (%d conditional requests)", n)
+	}
+}
+
+func TestEvictImmutableBlobDropsRow(t *testing.T) {
+	requireStack(t)
+	srv, _, _ := changingUpstream(t)
+	r := rpmRemote(t, "evict-blob", srv.URL)
+	const path = "8/Everything/x86_64/Packages/a/a-1.0-1.el8.x86_64.rpm"
+	fetchBody(t, r, path)
+	if c := layers(t, r.Name, path); c != blobCached {
+		t.Fatalf("before evict = %+v, want %+v", c, blobCached)
+	}
+	if err := testEngine.Evict(context.Background(), r.Name, path); err != nil {
+		t.Fatalf("evict: %v", err)
+	}
+	if c := layers(t, r.Name, path); c != (cached{}) {
+		t.Fatalf("after evict = %+v, want every layer gone", c)
+	}
+}
+
+func TestEvictRejectsNonDirectoryWildcard(t *testing.T) {
+	requireStack(t)
+	srv, _, _ := changingUpstream(t)
+	r := rpmRemote(t, "evict-bare", srv.URL)
+	const path = "8/Everything/x86_64/repodata/repomd.xml"
+	fetchBody(t, r, path)
+
+	for _, bad := range []string{"*", "8*", "8/Every*"} {
+		var pe *ProxyError
+		if err := testEngine.Evict(context.Background(), r.Name, bad); !errors.As(err, &pe) || pe.Status != http.StatusBadRequest {
+			t.Errorf("evict %s = %v, want 400", bad, err)
+		}
+	}
+	if c := layers(t, r.Name, path); c != (indexCached) {
+		t.Errorf("rejected wildcard evicted layers: %+v", c)
+	}
+}
+
+func TestEvictUnknownRemote(t *testing.T) {
+	requireStack(t)
+	var pe *ProxyError
+	if err := testEngine.Evict(context.Background(), "evict-no-such-remote", "a/b"); !errors.As(err, &pe) || pe.Status != http.StatusNotFound {
+		t.Fatalf("evict unknown remote = %v, want 404", err)
+	}
+}
+
+func holdLock(t *testing.T, remote, path string) {
+	t.Helper()
+	ctx := context.Background()
+	if ok, err := testCache.AcquireLock(ctx, remote, path, time.Minute); !ok || err != nil {
+		t.Fatalf("acquire: %v %v", ok, err)
+	}
+	t.Cleanup(func() { _ = testCache.ReleaseLock(ctx, remote, path) })
+}
+
+func TestEvictWaitsForFetchLock(t *testing.T) {
+	requireStack(t)
+	srv, _, _ := changingUpstream(t)
+	r := rpmRemote(t, "evict-lock", srv.URL)
+	ctx := context.Background()
+	const path = "8/Everything/x86_64/repodata/repomd.xml"
+	holdLock(t, r.Name, path)
+	done := make(chan error, 1)
+	go func() { done <- testEngine.Evict(ctx, r.Name, path) }()
+	select {
+	case err := <-done:
+		t.Fatalf("evict returned while fetch lock held: %v", err)
+	case <-time.After(200 * time.Millisecond):
+	}
+	_ = testCache.ReleaseLock(ctx, r.Name, path)
+	if err := <-done; err != nil {
+		t.Fatalf("evict: %v", err)
+	}
+	ok, err := testCache.AcquireLock(ctx, r.Name, path, time.Second)
+	if !ok || err != nil {
+		t.Fatalf("lock still held after evict: %v %v", ok, err)
+	}
+}
+
+func TestEvictCancelledWhileWaitingDeletesNothing(t *testing.T) {
+	requireStack(t)
+	srv, _, _ := changingUpstream(t)
+	r := rpmRemote(t, "evict-cancel", srv.URL)
+	const path = "8/Everything/x86_64/repodata/repomd.xml"
+	fetchBody(t, r, path)
+	holdLock(t, r.Name, path)
+
+	ctx, cancel := context.WithCancel(context.Background())
+	done := make(chan error, 1)
+	go func() { done <- testEngine.Evict(ctx, r.Name, path) }()
+	time.Sleep(100 * time.Millisecond)
+	cancel()
+	select {
+	case err := <-done:
+		if err == nil {
+			t.Fatal("cancelled evict returned nil")
+		}
+	case <-time.After(2 * time.Second):
+		t.Fatal("cancelled evict did not return")
+	}
+	if c := layers(t, r.Name, path); c != (indexCached) {
+		t.Errorf("cancelled evict deleted layers: %+v", c)
+	}
+}
+
+func TestEvictLockTimeoutIs503(t *testing.T) {
+	requireStack(t)
+	srv, _, _ := changingUpstream(t)
+	r := rpmRemote(t, "evict-timeout", srv.URL)
+	const path = "8/Everything/x86_64/repodata/repomd.xml"
+	fetchBody(t, r, path)
+	holdLock(t, r.Name, path)
+	prev := testEngine.evictLockWait
+	testEngine.evictLockWait = 100 * time.Millisecond
+	t.Cleanup(func() { testEngine.evictLockWait = prev })
+
+	var pe *ProxyError
+	if err := testEngine.Evict(context.Background(), r.Name, path); !errors.As(err, &pe) || pe.Status != http.StatusServiceUnavailable {
+		t.Fatalf("evict = %v, want 503", err)
+	}
+	if c := layers(t, r.Name, path); c != (indexCached) {
+		t.Errorf("timed-out evict deleted layers: %+v", c)
+	}
+}
+
+func TestEvictWildcardClearsPrefixOnly(t *testing.T) {
+	requireStack(t)
+	srv, rev, _ := changingUpstream(t)
+	r := rpmRemote(t, "evict-wild", srv.URL)
+	const (
+		repomd = "8/Everything/x86_64/repodata/repomd.xml"
+		rpm    = "8/Everything/x86_64/Packages/a/a-1.0-1.el8.x86_64.rpm"
+		other  = "9/Everything/x86_64/repodata/repomd.xml"
+	)
+	for _, p := range []string{repomd, rpm, other} {
+		fetchBody(t, r, p)
+	}
+	if c := layers(t, r.Name, rpm); c != blobCached {
+		t.Fatalf("%s before evict = %+v, want %+v", rpm, c, blobCached)
+	}
+	rev.Store("rev2")
+
+	if err := testEngine.Evict(context.Background(), r.Name, "8/Everything/x86_64/*"); err != nil {
+		t.Fatalf("evict: %v", err)
+	}
+	for _, p := range []string{repomd, rpm} {
+		if c := layers(t, r.Name, p); c != (cached{}) {
+			t.Errorf("%s after evict = %+v, want every layer gone", p, c)
+		}
+	}
+	if c := layers(t, r.Name, other); c != (indexCached) {
+		t.Errorf("%s outside prefix = %+v, want %+v", other, c, indexCached)
+	}
+	if got := fetchBody(t, r, repomd); got != "rev2:/"+repomd {
+		t.Errorf("index under prefix = %q, want rev2", got)
+	}
+	if got := fetchBody(t, r, rpm); got != "rev2:/"+rpm {
+		t.Errorf("artifact under prefix = %q, want rev2", got)
+	}
+	if got := fetchBody(t, r, other); got != "rev1:/"+other {
+		t.Errorf("path outside prefix = %q, want cached rev1", got)
+	}
+}

internal/proxy/leastconn_test.go

@@ -40,6 +40,51 @@ func TestLeastConnPicksLeastLoaded(t *testing.T) {
 	}
 }
 
+// TestLeastConnStableTieBreak asserts that when every mirror carries equal
+// in-flight load, least_conn falls back to the round-robin rotation: the
+// snapshot sort is stable, so tied mirrors keep the RR-rotated order and the
+// starting pick advances across the whole pool on successive calls.
+func TestLeastConnStableTieBreak(t *testing.T) {
+	e := &Engine{}
+	r := models.Remote{
+		Name:           "lc-tie",
+		BaseURL:        "https://a.example",
+		Mirrorlist:     []string{"https://b.example", "https://c.example"},
+		MirrorStrategy: models.MirrorStrategyLeastConn,
+	}
+	pool := r.UpstreamPool()
+
+	// Equal (zero) load on every mirror: order must equal the RR rotation.
+	starts := map[string]int{}
+	for i := 0; i < len(pool); i++ {
+		order := e.baseURLAttemptOrder(r)
+		if len(order) != len(pool) {
+			t.Fatalf("attempt %d: order len = %d, want %d", i, len(order), len(pool))
+		}
+		// A stable sort of an all-tied slice is a pure RR rotation: for the
+		// call whose cursor selects start s, order must be pool rotated by s.
+		start := indexOf(pool, order[0])
+		for j := range order {
+			if want := pool[(start+j)%len(pool)]; order[j] != want {
+				t.Fatalf("attempt %d: order[%d] = %q, want RR-rotated %q", i, j, order[j], want)
+			}
+		}
+		starts[order[0]]++
+	}
+	if len(starts) != len(pool) {
+		t.Fatalf("tied least_conn did not rotate across the whole pool: %v", starts)
+	}
+}
+
+func indexOf(s []string, v string) int {
+	for i := range s {
+		if s[i] == v {
+			return i
+		}
+	}
+	return -1
+}
+
 // TestRoundRobinDefaultUnchanged asserts an unset strategy still rotates the
 // starting mirror across the pool and ignores the in-flight gauge.
 func TestRoundRobinDefaultUnchanged(t *testing.T) {

internal/proxy/selection_bench_test.go

@@ -0,0 +1,156 @@
+package proxy
+
+import (
+	"fmt"
+	"testing"
+
+	"git.unkin.net/unkin/artifactapi/pkg/models"
+)
+
+// These benchmarks isolate the mirror-selection overhead only: they construct a
+// zero-value Engine (no DB/S3/redis) and call baseURLAttemptOrder /
+// beginAttempt / endAttempt directly, mirroring leastconn_test.go and
+// multibaseurl_test.go. This quantifies how much latency the load-balancing
+// strategy (round_robin vs least_conn) adds versus a single-URL remote. Note
+// that in the live proxy this selection runs only on the cache-miss/upstream
+// path; a cache hit never calls it.
+
+// mirrorPool builds a remote with n upstreams (base_url + n-1 mirrorlist
+// entries) under the given strategy.
+func mirrorPool(name, strategy string, n int) models.Remote {
+	r := models.Remote{
+		Name:           name,
+		BaseURL:        "https://mirror0.example/repo",
+		MirrorStrategy: strategy,
+	}
+	for i := 1; i < n; i++ {
+		r.Mirrorlist = append(r.Mirrorlist, fmt.Sprintf("https://mirror%d.example/repo", i))
+	}
+	return r
+}
+
+// skewInflight sets an ascending in-flight load across the pool so least_conn's
+// stable sort has real work to do (mirror0 busiest, last mirror idle).
+func skewInflight(e *Engine, r models.Remote) {
+	pool := r.UpstreamPool()
+	for i, u := range pool {
+		e.inflightCounter(r.Name, u).Add(int64(len(pool) - i))
+	}
+}
+
+// BenchmarkBaseURLAttemptOrder_SingleURL measures the early-return no-op path
+// (pool of 1): the branch that preserves original single-attempt behavior and
+// must add effectively zero overhead. This is the same code the cache-miss path
+// takes for every non-mirrored remote.
+func BenchmarkBaseURLAttemptOrder_SingleURL(b *testing.B) {
+	e := &Engine{}
+	r := models.Remote{Name: "solo", BaseURL: "https://mirror0.example/repo"}
+	b.ReportAllocs()
+	b.ResetTimer()
+	for i := 0; i < b.N; i++ {
+		_ = e.baseURLAttemptOrder(r)
+	}
+}
+
+// BenchmarkBaseURLAttemptOrder_RoundRobin measures the default strategy: rotate
+// the starting mirror by an atomic cursor and materialize the ordered slice. No
+// in-flight sort.
+func BenchmarkBaseURLAttemptOrder_RoundRobin(b *testing.B) {
+	for _, n := range []int{3, 8} {
+		b.Run(fmt.Sprintf("pool%d", n), func(b *testing.B) {
+			e := &Engine{}
+			r := mirrorPool("rr", models.MirrorStrategyRoundRobin, n)
+			b.ReportAllocs()
+			b.ResetTimer()
+			for i := 0; i < b.N; i++ {
+				_ = e.baseURLAttemptOrder(r)
+			}
+		})
+	}
+}
+
+// BenchmarkBaseURLAttemptOrder_LeastConn measures the least_conn strategy: RR
+// rotation plus a stable sort of the pool by the atomic in-flight gauges. Skew
+// is preloaded so the sort compares distinct loads.
+func BenchmarkBaseURLAttemptOrder_LeastConn(b *testing.B) {
+	for _, n := range []int{3, 8} {
+		b.Run(fmt.Sprintf("pool%d", n), func(b *testing.B) {
+			e := &Engine{}
+			r := mirrorPool("lc", models.MirrorStrategyLeastConn, n)
+			skewInflight(e, r)
+			b.ReportAllocs()
+			b.ResetTimer()
+			for i := 0; i < b.N; i++ {
+				_ = e.baseURLAttemptOrder(r)
+			}
+		})
+	}
+}
+
+// BenchmarkBeginEndAttempt measures the gauge inc/dec pair that brackets each
+// least_conn upstream attempt (LoadOrStore + atomic add, then atomic add back).
+func BenchmarkBeginEndAttempt(b *testing.B) {
+	e := &Engine{}
+	r := mirrorPool("g", models.MirrorStrategyLeastConn, 3)
+	url := r.UpstreamPool()[0]
+	b.ReportAllocs()
+	b.ResetTimer()
+	for i := 0; i < b.N; i++ {
+		ctr := e.beginAttempt(r, url)
+		endAttempt(ctr)
+	}
+}
+
+// BenchmarkBaseURLAttemptOrder_RoundRobin_Parallel surfaces atomic-cursor
+// contention on the shared rrCounters entry under concurrent selection.
+func BenchmarkBaseURLAttemptOrder_RoundRobin_Parallel(b *testing.B) {
+	for _, n := range []int{3, 8} {
+		b.Run(fmt.Sprintf("pool%d", n), func(b *testing.B) {
+			e := &Engine{}
+			r := mirrorPool("rrp", models.MirrorStrategyRoundRobin, n)
+			b.ReportAllocs()
+			b.ResetTimer()
+			b.RunParallel(func(pb *testing.PB) {
+				for pb.Next() {
+					_ = e.baseURLAttemptOrder(r)
+				}
+			})
+		})
+	}
+}
+
+// BenchmarkBaseURLAttemptOrder_LeastConn_Parallel surfaces sync.Map read
+// contention on the in-flight gauges plus the per-call sort under concurrency.
+func BenchmarkBaseURLAttemptOrder_LeastConn_Parallel(b *testing.B) {
+	for _, n := range []int{3, 8} {
+		b.Run(fmt.Sprintf("pool%d", n), func(b *testing.B) {
+			e := &Engine{}
+			r := mirrorPool("lcp", models.MirrorStrategyLeastConn, n)
+			skewInflight(e, r)
+			b.ReportAllocs()
+			b.ResetTimer()
+			b.RunParallel(func(pb *testing.PB) {
+				for pb.Next() {
+					_ = e.baseURLAttemptOrder(r)
+				}
+			})
+		})
+	}
+}
+
+// BenchmarkBeginEndAttempt_Parallel exercises the gauge inc/dec pair under
+// concurrency: all goroutines hammer the same atomic.Int64, the realistic
+// hot-mirror case, to surface counter contention.
+func BenchmarkBeginEndAttempt_Parallel(b *testing.B) {
+	e := &Engine{}
+	r := mirrorPool("gp", models.MirrorStrategyLeastConn, 3)
+	url := r.UpstreamPool()[0]
+	b.ReportAllocs()
+	b.ResetTimer()
+	b.RunParallel(func(pb *testing.PB) {
+		for pb.Next() {
+			ctr := e.beginAttempt(r, url)
+			endAttempt(ctr)
+		}
+	})
+}

internal/server/server.go

@@ -21,6 +21,7 @@ import (
 	"git.unkin.net/unkin/artifactapi/internal/gc"
 	"git.unkin.net/unkin/artifactapi/internal/githubauth"
 	"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"
@@ -196,8 +197,8 @@ func (s *Server) routes() chi.Router {
 
 		r.Route("/remotes/{name}/objects", func(r chi.Router) {
 			objHandler := v2.NewObjectsHandler(s.db)
-			r.Get("/", objHandler.Routes().ServeHTTP)
+			r.Get("/", objHandler.Routes(s.engine).ServeHTTP)
-			r.Delete("/*", objHandler.Routes().ServeHTTP)
+			r.Delete("/*", objHandler.Routes(s.engine).ServeHTTP)
 		})
 
 		r.Route("/locals/{name}/objects", func(r chi.Router) {

internal/storage/s3.go

@@ -99,6 +99,30 @@ func (s *S3) Stat(ctx context.Context, key string) (*minio.ObjectInfo, error) {
 	return &info, nil
 }
 
+// DeletePrefix removes every object whose key starts with prefix. It lists
+// first so a failed list returns its error instead of deleting nothing.
+func (s *S3) DeletePrefix(ctx context.Context, prefix string) error {
+	var objs []minio.ObjectInfo
+	for obj := range s.client.ListObjects(ctx, s.bucket, minio.ListObjectsOptions{Prefix: prefix, Recursive: true}) {
+		if obj.Err != nil {
+			return obj.Err
+		}
+		objs = append(objs, obj)
+	}
+	ch := make(chan minio.ObjectInfo, len(objs))
+	for _, obj := range objs {
+		ch <- obj
+	}
+	close(ch)
+	var err error
+	for res := range s.client.RemoveObjects(ctx, s.bucket, ch, minio.RemoveObjectsOptions{}) {
+		if res.Err != nil && err == nil {
+			err = res.Err
+		}
+	}
+	return err
+}
+
 // ListStaleObjects returns keys under prefix last modified before cutoff. Used
 // by the GC to reap abandoned staging objects (e.g. cancelled docker pushes).
 func (s *S3) ListStaleObjects(ctx context.Context, prefix string, cutoff time.Time) ([]string, error) {

internal/storage/storage_test.go

@@ -4,11 +4,15 @@ import (
 	"bytes"
 	"context"
 	"io"
+	"net/http"
+	"net/http/httptest"
 	"os"
 	"strings"
 	"testing"
 	"time"
 
+	"github.com/minio/minio-go/v7"
+
 	"git.unkin.net/unkin/artifactapi/internal/testsupport"
 )
 
@@ -158,3 +162,26 @@ func TestCASStore(t *testing.T) {
 		t.Errorf("stored content mismatch: %q", got)
 	}
 }
+
+// The fake endpoint fails every list but accepts every delete, as an S3 that
+// tolerates deleting an empty key would.
+func TestDeletePrefixReturnsListError(t *testing.T) {
+	srv := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		if r.Method == http.MethodPost {
+			_, _ = io.WriteString(w, `<DeleteResult></DeleteResult>`)
+			return
+		}
+		w.WriteHeader(http.StatusInternalServerError)
+		_, _ = io.WriteString(w, `<Error><Code>InternalError</Code><Message>list failed</Message></Error>`)
+	}))
+	defer srv.Close()
+	client, err := minio.New(strings.TrimPrefix(srv.URL, "http://"), &minio.Options{Region: "us-east-1", MaxRetries: 1})
+	if err != nil {
+		t.Fatal(err)
+	}
+	s := &S3{client: client, bucket: "bucket"}
+	err = s.DeletePrefix(context.Background(), "indexes/r/")
+	if err == nil {
+		t.Fatal("DeletePrefix on a failing list returned nil")
+	}
+}

internal/virtual/engine.go

@@ -2,27 +2,58 @@ package virtual
 
 import (
 	"context"
+	"errors"
 	"fmt"
 	"io"
 	"log/slog"
+	"net/http"
+	"net/http/httptest"
+	"net/url"
+	"slices"
+	"strings"
 	"sync"
+	"time"
 
 	"git.unkin.net/unkin/artifactapi/internal/database"
 	"git.unkin.net/unkin/artifactapi/internal/provider"
 	"git.unkin.net/unkin/artifactapi/internal/proxy"
 	"git.unkin.net/unkin/artifactapi/pkg/models"
+	"golang.org/x/sync/singleflight"
 )
 
 type Engine struct {
 	db          *database.DB
 	proxyEngine *proxy.Engine
+	getRemote   func(context.Context, string) (*models.Remote, error)
+	rpmMember   func(context.Context, string) (*RPMMember, error)
+
+	mergeTTL time.Duration
+
+	sf  singleflight.Group
+	mu  sync.Mutex
+	rpm map[string]*rpmGen
 }
 
+// rpmGen holds a virtual's current merge plus the previous one, so a client
+// holding the previous repomd can still fetch its content-hashed data files.
+type rpmGen struct {
+	cur, prev *RPMRepo
+	at        time.Time
+}
+
+const rpmMergeTTL = 60 * time.Second
+
 func NewEngine(db *database.DB, proxyEngine *proxy.Engine) *Engine {
-	return &Engine{db: db, proxyEngine: proxyEngine}
+	e := &Engine{db: db, proxyEngine: proxyEngine, getRemote: db.GetRemote, mergeTTL: rpmMergeTTL}
+	e.rpmMember = e.fetchRPMMember
+	return e
 }
 
 func (e *Engine) Fetch(ctx context.Context, virt models.Virtual, path string, proxyBaseURL string) ([]byte, string, error) {
+	if virt.PackageType == models.PackageRPM {
+		return e.fetchRPM(ctx, virt, path)
+	}
+
 	merger, err := GetMerger(virt.PackageType)
 	if err != nil {
 		return nil, "", fmt.Errorf("unsupported virtual type %q: %w", virt.PackageType, err)
@@ -133,3 +164,233 @@ func (e *Engine) fetchLocalIndex(ctx context.Context, remote models.Remote, path
 
 	return indexer.GenerateLocalIndex(ctx, e.db, remote.Name, path)
 }
+
+var (
+	ErrNotFound = errors.New("not found")
+	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.
+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/") {
+		return "", false, nil
+	}
+	name, rest, found := strings.Cut(path, "/")
+	if !found || !slices.Contains(virt.Members, name) {
+		return "", false, nil
+	}
+	segs, err := memberSegments(rest)
+	if err != nil {
+		return "", false, err
+	}
+	remote, err := e.getRemote(ctx, name)
+	if err != nil {
+		return "", false, nil
+	}
+	loc := fmt.Sprintf("%s/api/v1/%s/%s/%s", strings.TrimRight(proxyBaseURL, "/"), remote.RepoType, url.PathEscape(name), strings.Join(segs, "/"))
+	if rawQuery != "" {
+		loc += "?" + rawQuery
+	}
+	return loc, true, nil
+}
+
+// memberSegments decodes rest and returns its path-escaped segments, rejecting
+// absolute paths and any "." or ".." segment.
+func memberSegments(rest string) ([]string, error) {
+	dec, err := url.PathUnescape(rest)
+	if err != nil || dec == "" || strings.HasPrefix(dec, "/") {
+		return nil, ErrBadPath
+	}
+	segs := strings.Split(dec, "/")
+	for i, s := range segs {
+		if s == "." || s == ".." || strings.Contains(s, "\\") {
+			return nil, ErrBadPath
+		}
+		segs[i] = url.PathEscape(s)
+	}
+	return segs, nil
+}
+
+func (e *Engine) fetchRPM(ctx context.Context, virt models.Virtual, path string) ([]byte, string, error) {
+	if !strings.HasPrefix(path, "repodata/") {
+		return nil, "", ErrNotFound
+	}
+	if path != "repodata/repomd.xml" {
+		if body, ok := e.cachedRPMFile(virt.Name, path); ok {
+			return body, "application/gzip", nil
+		}
+	}
+
+	repo, err := e.mergedRPM(ctx, virt)
+	if err != nil {
+		return nil, "", err
+	}
+	if path == "repodata/repomd.xml" {
+		return repo.Repomd, "application/xml", nil
+	}
+	if body, ok := repo.Files[path]; ok {
+		return body, "application/gzip", nil
+	}
+	return nil, "", ErrNotFound
+}
+
+// mergedRPM returns the virtual's merge, reusing it for mergeTTL and
+// collapsing concurrent merges of the same virtual into one.
+// ponytail: per-replica cache; behind a non-sticky LB a data request landing on
+// another replica re-merges and 404s if a member changed in between. Move to the
+// shared redis cache if that shows up.
+func (e *Engine) mergedRPM(ctx context.Context, virt models.Virtual) (*RPMRepo, error) {
+	e.mu.Lock()
+	g := e.rpm[virt.Name]
+	if g != nil && time.Since(g.at) < e.mergeTTL {
+		e.mu.Unlock()
+		return g.cur, nil
+	}
+	e.mu.Unlock()
+
+	v, err, _ := e.sf.Do(virt.Name, func() (any, error) {
+		repo, err := e.mergeRPM(context.WithoutCancel(ctx), virt)
+		if err != nil {
+			return nil, err
+		}
+		e.mu.Lock()
+		defer e.mu.Unlock()
+		if e.rpm == nil {
+			e.rpm = map[string]*rpmGen{}
+		}
+		g := e.rpm[virt.Name]
+		switch {
+		case g == nil:
+			e.rpm[virt.Name] = &rpmGen{cur: repo, at: time.Now()}
+		case string(g.cur.Repomd) == string(repo.Repomd):
+			g.at = time.Now()
+			repo = g.cur
+		default:
+			g.prev, g.cur, g.at = g.cur, repo, time.Now()
+		}
+		return repo, nil
+	})
+	if err != nil {
+		return nil, err
+	}
+	return v.(*RPMRepo), nil
+}
+
+func (e *Engine) mergeRPM(ctx context.Context, virt models.Virtual) (*RPMRepo, error) {
+	members := make([]RPMMember, len(virt.Members))
+	errs := make([]error, len(virt.Members))
+	var wg sync.WaitGroup
+	for i, name := range virt.Members {
+		wg.Add(1)
+		go func() {
+			defer wg.Done()
+			m, err := e.rpmMember(ctx, name)
+			if err != nil {
+				errs[i] = fmt.Errorf("member %q: %w", name, err)
+				return
+			}
+			members[i] = *m
+		}()
+	}
+	wg.Wait()
+	// %v, not %w: a member failure is a 502 whatever its cause, never a 404.
+	if err := errors.Join(errs...); err != nil {
+		return nil, fmt.Errorf("virtual %q: %v", virt.Name, err)
+	}
+
+	repo, err := MergeRPM(members)
+	if err != nil {
+		return nil, fmt.Errorf("merge rpm repodata: %w", err)
+	}
+	return repo, nil
+}
+
+func (e *Engine) cachedRPMFile(virt, path string) ([]byte, bool) {
+	e.mu.Lock()
+	defer e.mu.Unlock()
+	g := e.rpm[virt]
+	if g == nil {
+		return nil, false
+	}
+	for _, r := range []*RPMRepo{g.cur, g.prev} {
+		if r == nil {
+			continue
+		}
+		if body, ok := r.Files[path]; ok {
+			return body, true
+		}
+	}
+	return nil, false
+}
+
+func (e *Engine) fetchRPMMember(ctx context.Context, name string) (*RPMMember, error) {
+	remote, err := e.getRemote(ctx, name)
+	if err != nil {
+		return nil, fmt.Errorf("remote %q: %w", name, err)
+	}
+	repomd, err := e.fetchMemberPath(ctx, *remote, "repodata/repomd.xml")
+	if err != nil {
+		return nil, err
+	}
+	locs, ts, err := parseRepomd(repomd)
+	if err != nil {
+		return nil, err
+	}
+	m := &RPMMember{RemoteName: name, Bases: remote.UpstreamPool(), Timestamp: ts, Data: map[string][]byte{}}
+	for t, href := range locs {
+		raw, err := e.fetchMemberPath(ctx, *remote, href)
+		if err != nil {
+			return nil, err
+		}
+		if m.Data[t], err = decompress(href, raw); err != nil {
+			return nil, fmt.Errorf("decompress %s: %w", href, err)
+		}
+	}
+	return m, nil
+}
+
+// fetchMemberPath reads one path from a member the same way its own route
+// would serve it: local index, synthesized remote (e.g. github_rpm), or proxy.
+func (e *Engine) fetchMemberPath(ctx context.Context, remote models.Remote, path string) ([]byte, error) {
+	prov, err := provider.Get(remote.PackageType)
+	if err != nil {
+		return nil, fmt.Errorf("provider %q: %w", remote.PackageType, err)
+	}
+
+	var serve func(w http.ResponseWriter, r *http.Request) bool
+	if remote.RepoType == models.RepoTypeLocal {
+		indexer, ok := prov.(provider.LocalIndexer)
+		if !ok {
+			return nil, fmt.Errorf("provider %q does not serve a local index", remote.PackageType)
+		}
+		serve = func(w http.ResponseWriter, r *http.Request) bool {
+			return indexer.ServeLocalIndex(w, r, e.db, remote.Name, path)
+		}
+	} else if rs, ok := prov.(provider.RemoteServer); ok {
+		serve = func(w http.ResponseWriter, r *http.Request) bool {
+			return rs.ServeRemote(w, r, remote, path, "", e.db)
+		}
+	}
+
+	if serve != nil {
+		rec := httptest.NewRecorder()
+		if serve(rec, httptest.NewRequestWithContext(ctx, http.MethodGet, "/"+path, nil)) {
+			if rec.Code != http.StatusOK {
+				return nil, fmt.Errorf("%s/%s: status %d", remote.Name, path, rec.Code)
+			}
+			return rec.Body.Bytes(), nil
+		}
+		if remote.RepoType == models.RepoTypeLocal {
+			return nil, fmt.Errorf("%s/%s: %w", remote.Name, path, ErrNotFound)
+		}
+	}
+
+	res, err := e.proxyEngine.Fetch(ctx, remote, path, prov)
+	if err != nil {
+		return nil, fmt.Errorf("fetch %s/%s: %w", remote.Name, path, err)
+	}
+	defer res.Reader.Close()
+	return io.ReadAll(res.Reader)
+}

internal/virtual/engine_test.go

@@ -0,0 +1,158 @@
+package virtual
+
+import (
+	"context"
+	"errors"
+	"fmt"
+	"regexp"
+	"sync"
+	"sync/atomic"
+	"testing"
+	"time"
+
+	"git.unkin.net/unkin/artifactapi/pkg/models"
+)
+
+func fakeEngine(members map[string]*RPMMember) *Engine {
+	return &Engine{
+		getRemote: func(_ context.Context, name string) (*models.Remote, error) {
+			return &models.Remote{Name: name, RepoType: models.RepoTypeRemote}, nil
+		},
+		rpmMember: func(_ context.Context, name string) (*RPMMember, error) {
+			if m := members[name]; m != nil {
+				return m, nil
+			}
+			return nil, errors.New("upstream down")
+		},
+	}
+}
+
+func rpmVirt(members ...string) models.Virtual {
+	return models.Virtual{Name: "v", PackageType: models.PackageRPM, Members: members}
+}
+
+func TestFetchRPMFailsClosed(t *testing.T) {
+	e := fakeEngine(map[string]*RPMMember{
+		"a": {RemoteName: "a", Data: map[string][]byte{"primary": primaryXML(primaryPkgXML("foo", "1", "aaa", "foo.rpm"))}},
+	})
+	_, _, err := e.Fetch(context.Background(), rpmVirt("a", "b"), "repodata/repomd.xml", "")
+	if err == nil || errors.Is(err, ErrNotFound) {
+		t.Fatalf("want upstream error with a member down, got %v", err)
+	}
+}
+
+func TestFetchRPMDataSurvivesMemberChange(t *testing.T) {
+	m := &RPMMember{RemoteName: "a", Data: map[string][]byte{"primary": primaryXML(primaryPkgXML("foo", "1", "aaa", "foo.rpm"))}}
+	e := fakeEngine(map[string]*RPMMember{"a": m})
+	virt := rpmVirt("a")
+
+	repomd, _, err := e.Fetch(context.Background(), virt, "repodata/repomd.xml", "")
+	if err != nil {
+		t.Fatal(err)
+	}
+	m.Data = map[string][]byte{"primary": primaryXML(primaryPkgXML("foo", "2", "bbb", "foo2.rpm"))}
+
+	href := regexp.MustCompile(`repodata/[0-9a-f]+-primary\.xml\.gz`).Find(repomd)
+	body, _, err := e.Fetch(context.Background(), virt, string(href), "")
+	if err != nil {
+		t.Fatalf("data from previous repomd must stay resolvable: %v", err)
+	}
+	if got := string(gunzip(t, body)); !regexp.MustCompile(`ver="1"`).MatchString(got) {
+		t.Fatalf("served wrong primary:\n%s", got)
+	}
+
+	newMD, _, err := e.Fetch(context.Background(), virt, "repodata/repomd.xml", "")
+	if err != nil || string(newMD) == string(repomd) {
+		t.Fatalf("repomd should reflect the member change (err %v)", err)
+	}
+	if _, _, err := e.Fetch(context.Background(), virt, string(href), ""); err != nil {
+		t.Fatalf("previous generation must survive one re-merge: %v", err)
+	}
+}
+
+func TestFetchRPMLocalMemberWithoutRepodataIsUpstreamError(t *testing.T) {
+	e := fakeEngine(map[string]*RPMMember{
+		"a": {RemoteName: "a", Data: map[string][]byte{"primary": primaryXML(primaryPkgXML("foo", "1", "aaa", "foo.rpm"))}},
+	})
+	e.rpmMember = func(_ context.Context, name string) (*RPMMember, error) {
+		if name == "local" {
+			return nil, fmt.Errorf("local/repodata/repomd.xml: %w", ErrNotFound)
+		}
+		return &RPMMember{RemoteName: name, Data: map[string][]byte{"primary": primaryXML(primaryPkgXML("foo", "1", "aaa", "foo.rpm"))}}, nil
+	}
+	_, _, err := e.Fetch(context.Background(), rpmVirt("a", "local"), "repodata/repomd.xml", "")
+	if err == nil || errors.Is(err, ErrNotFound) {
+		t.Fatalf("member failure must not surface as not-found, got %v", err)
+	}
+}
+
+func TestFetchRPMMergeIsShared(t *testing.T) {
+	var calls atomic.Int32
+	e := fakeEngine(nil)
+	e.mergeTTL = time.Minute
+	e.rpmMember = func(_ context.Context, name string) (*RPMMember, error) {
+		calls.Add(1)
+		time.Sleep(20 * time.Millisecond)
+		return &RPMMember{RemoteName: name, Data: map[string][]byte{"primary": primaryXML(primaryPkgXML("foo", "1", "aaa", "foo.rpm"))}}, nil
+	}
+	var wg sync.WaitGroup
+	for range 10 {
+		wg.Add(1)
+		go func() {
+			defer wg.Done()
+			if _, _, err := e.Fetch(context.Background(), rpmVirt("a"), "repodata/repomd.xml", ""); err != nil {
+				t.Error(err)
+			}
+		}()
+	}
+	wg.Wait()
+	if _, _, err := e.Fetch(context.Background(), rpmVirt("a"), "repodata/repomd.xml", ""); err != nil {
+		t.Fatal(err)
+	}
+	if n := calls.Load(); n != 1 {
+		t.Fatalf("member fetched %d times, want 1", n)
+	}
+}
+
+func TestFetchRPMDataScopedToVirtual(t *testing.T) {
+	e := fakeEngine(map[string]*RPMMember{
+		"a": {RemoteName: "a", Data: map[string][]byte{"primary": primaryXML(primaryPkgXML("foo", "1", "aaa", "foo.rpm"))}},
+		"b": {RemoteName: "b", Data: map[string][]byte{"primary": primaryXML(primaryPkgXML("bar", "1", "bbb", "bar.rpm"))}},
+	})
+	virtA := models.Virtual{Name: "va", PackageType: models.PackageRPM, Members: []string{"a"}}
+	virtB := models.Virtual{Name: "vb", PackageType: models.PackageRPM, Members: []string{"b"}}
+
+	repomd, _, err := e.Fetch(context.Background(), virtA, "repodata/repomd.xml", "")
+	if err != nil {
+		t.Fatal(err)
+	}
+	href := regexp.MustCompile(`repodata/[0-9a-f]+-primary\.xml\.gz`).Find(repomd)
+	if _, _, err := e.Fetch(context.Background(), virtB, string(href), ""); !errors.Is(err, ErrNotFound) {
+		t.Fatalf("virtual vb served va's data file (err %v)", err)
+	}
+}
+
+func TestMemberRedirect(t *testing.T) {
+	e := fakeEngine(nil)
+	virt := rpmVirt("gh", "other")
+	for _, tc := range []struct {
+		path, query, want string
+		ok                bool
+		err               error
+	}{
+		{path: "gh/o/r/releases/download/v1/c++-1.rpm", query: "x=1", ok: true,
+			want: "http://h/api/v1/remote/gh/o/r/releases/download/v1/c++-1.rpm?x=1"},
+		{path: "gh/a%20b/c%3Fd.rpm", ok: true, want: "http://h/api/v1/remote/gh/a%20b/c%3Fd.rpm"},
+		{path: "gh/../../remote/other/x", err: ErrBadPath},
+		{path: "gh/%2e%2e/%2e%2e/remote/other/x", err: ErrBadPath},
+		{path: "gh/a/./b", err: ErrBadPath},
+		{path: "gh//etc/passwd", err: ErrBadPath},
+		{path: "repodata/repomd.xml"},
+		{path: "nope/x.rpm"},
+	} {
+		got, ok, err := e.MemberRedirect(context.Background(), virt, tc.path, tc.query, "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)
+		}
+	}
+}

internal/virtual/rpm_merger.go

@@ -0,0 +1,298 @@
+package virtual
+
+import (
+	"bytes"
+	"compress/bzip2"
+	"compress/gzip"
+	"crypto/sha256"
+	"encoding/hex"
+	"encoding/xml"
+	"errors"
+	"fmt"
+	"io"
+	"regexp"
+	"strings"
+
+	"github.com/klauspost/compress/zstd"
+	"github.com/ulikunitz/xz"
+)
+
+var rpmDataTypes = []string{"primary", "filelists", "other"}
+
+var rpmRoots = map[string]string{
+	"primary":   `<metadata xmlns="http://linux.duke.edu/metadata/common" xmlns:rpm="http://linux.duke.edu/metadata/rpm" packages="%d">`,
+	"filelists": `<filelists xmlns="http://linux.duke.edu/metadata/filelists" packages="%d">`,
+	"other":     `<otherdata xmlns="http://linux.duke.edu/metadata/other" packages="%d">`,
+}
+
+var rpmRootClose = map[string]string{"primary": "</metadata>", "filelists": "</filelists>", "other": "</otherdata>"}
+
+var locationRe = regexp.MustCompile(`<location\b[^>]*/>`)
+
+// RPMMember is one member repo's decompressed primary/filelists/other XML,
+// keyed by repomd data type. Missing types contribute no packages.
+type RPMMember struct {
+	RemoteName string
+	Bases      []string
+	Timestamp  int64
+	Data       map[string][]byte
+}
+
+// RPMRepo is a merged yum repo: repomd.xml plus the files it references, keyed
+// by their path under the repo root.
+type RPMRepo struct {
+	Repomd []byte
+	Files  map[string][]byte
+}
+
+type repomdDoc struct {
+	Revision string       `xml:"revision"`
+	Data     []repomdData `xml:"data"`
+}
+
+type repomdData struct {
+	Type     string `xml:"type,attr"`
+	Location struct {
+		Href string `xml:"href,attr"`
+	} `xml:"location"`
+	Timestamp int64 `xml:"timestamp"`
+}
+
+type rpmPkgVersion struct {
+	Epoch string `xml:"epoch,attr"`
+	Ver   string `xml:"ver,attr"`
+	Rel   string `xml:"rel,attr"`
+}
+
+type primaryPkg struct {
+	Name     string        `xml:"name"`
+	Arch     string        `xml:"arch"`
+	Version  rpmPkgVersion `xml:"version"`
+	Checksum string        `xml:"checksum"`
+	Location struct {
+		Href string `xml:"href,attr"`
+		Base string `xml:"http://www.w3.org/XML/1998/namespace base,attr"`
+	} `xml:"location"`
+}
+
+type pkgidPkg struct {
+	PkgID string `xml:"pkgid,attr"`
+}
+
+// parseRepomd returns the member's primary/filelists/other locations and its
+// newest data timestamp.
+func parseRepomd(body []byte) (map[string]string, int64, error) {
+	var doc repomdDoc
+	if err := xml.Unmarshal(body, &doc); err != nil {
+		return nil, 0, fmt.Errorf("parse repomd.xml: %w", err)
+	}
+	locs := map[string]string{}
+	var ts int64
+	for _, d := range doc.Data {
+		for _, t := range rpmDataTypes {
+			if d.Type == t && d.Location.Href != "" {
+				locs[t] = d.Location.Href
+				ts = max(ts, d.Timestamp)
+			}
+		}
+	}
+	if locs["primary"] == "" {
+		return nil, 0, errors.New("repomd.xml has no primary data")
+	}
+	return locs, ts, nil
+}
+
+func decompress(href string, body []byte) ([]byte, error) {
+	var r io.Reader
+	switch {
+	case strings.HasSuffix(href, ".gz"):
+		gz, err := gzip.NewReader(bytes.NewReader(body))
+		if err != nil {
+			return nil, err
+		}
+		r = gz
+	case strings.HasSuffix(href, ".xz"):
+		x, err := xz.NewReader(bytes.NewReader(body))
+		if err != nil {
+			return nil, err
+		}
+		r = x
+	case strings.HasSuffix(href, ".zst"):
+		z, err := zstd.NewReader(bytes.NewReader(body))
+		if err != nil {
+			return nil, err
+		}
+		defer z.Close()
+		r = z
+	case strings.HasSuffix(href, ".bz2"):
+		r = bzip2.NewReader(bytes.NewReader(body))
+	default:
+		return body, nil
+	}
+	return io.ReadAll(r)
+}
+
+// splitPackages returns the raw bytes of each top-level <package> element.
+func splitPackages(doc []byte) ([][]byte, error) {
+	d := xml.NewDecoder(bytes.NewReader(doc))
+	var pkgs [][]byte
+	depth := 0
+	for {
+		start := d.InputOffset()
+		tok, err := d.Token()
+		if err == io.EOF {
+			return pkgs, nil
+		}
+		if err != nil {
+			return nil, err
+		}
+		switch t := tok.(type) {
+		case xml.StartElement:
+			if depth == 1 && t.Name.Local == "package" {
+				if err := d.Skip(); err != nil {
+					return nil, err
+				}
+				pkgs = append(pkgs, doc[start:d.InputOffset()])
+				continue
+			}
+			depth++
+		case xml.EndElement:
+			depth--
+		}
+	}
+}
+
+// memberHref returns href relative to the member root. An xml:base under one of
+// the member's upstream bases is folded into the href; any other xml:base is a
+// host the member can't serve, so ok is false and the location is left as is.
+func memberHref(m RPMMember, base, href string) (string, bool) {
+	href = strings.TrimLeft(href, "/")
+	if base == "" {
+		return href, true
+	}
+	base = strings.TrimRight(base, "/") + "/"
+	for _, b := range m.Bases {
+		b = strings.TrimRight(b, "/") + "/"
+		if strings.HasPrefix(base, b) {
+			return strings.TrimPrefix(base, b) + href, true
+		}
+	}
+	return "", false
+}
+
+func xmlEscape(s string) string {
+	var b bytes.Buffer
+	_ = xml.EscapeText(&b, []byte(s))
+	return b.String()
+}
+
+// MergeRPM merges members into one repo. Members are in priority order: the
+// first member to carry a NEVRA wins. Package locations are prefixed with the
+// owning member's name so the virtual can route downloads back to it.
+func MergeRPM(members []RPMMember) (*RPMRepo, error) {
+	kept := map[string]bool{}
+	seen := map[string]bool{}
+	out := map[string][][]byte{}
+
+	for i, m := range members {
+		pkgs, err := splitPackages(m.Data["primary"])
+		if err != nil {
+			return nil, fmt.Errorf("member %q primary: %w", m.RemoteName, err)
+		}
+		for _, raw := range pkgs {
+			var p primaryPkg
+			if err := xml.Unmarshal(raw, &p); err != nil {
+				return nil, fmt.Errorf("member %q primary package: %w", m.RemoteName, err)
+			}
+			epoch := p.Version.Epoch
+			if epoch == "" {
+				epoch = "0"
+			}
+			nevra := fmt.Sprintf("%s-%s:%s-%s.%s", p.Name, epoch, p.Version.Ver, p.Version.Rel, p.Arch)
+			if seen[nevra] {
+				continue
+			}
+			seen[nevra] = true
+			kept[fmt.Sprintf("%d/%s", i, p.Checksum)] = true
+
+			if href, ok := memberHref(m, p.Location.Base, p.Location.Href); ok {
+				loc := `<location href="` + xmlEscape(m.RemoteName+"/"+href) + `"/>`
+				raw = locationRe.ReplaceAll(raw, []byte(loc))
+			}
+			out["primary"] = append(out["primary"], raw)
+		}
+	}
+
+	for _, t := range rpmDataTypes[1:] {
+		emitted := map[string]bool{}
+		for i, m := range members {
+			pkgs, err := splitPackages(m.Data[t])
+			if err != nil {
+				return nil, fmt.Errorf("member %q %s: %w", m.RemoteName, t, err)
+			}
+			for _, raw := range pkgs {
+				var p pkgidPkg
+				if err := xml.Unmarshal(raw, &p); err != nil {
+					return nil, fmt.Errorf("member %q %s package: %w", m.RemoteName, t, err)
+				}
+				key := fmt.Sprintf("%d/%s", i, p.PkgID)
+				if kept[key] && !emitted[key] {
+					emitted[key] = true
+					out[t] = append(out[t], raw)
+				}
+			}
+		}
+	}
+
+	var ts int64
+	for _, m := range members {
+		ts = max(ts, m.Timestamp)
+	}
+
+	repo := &RPMRepo{Files: map[string][]byte{}}
+	var md bytes.Buffer
+	md.WriteString(xml.Header)
+	md.WriteString(`<repomd xmlns="http://linux.duke.edu/metadata/repo" xmlns:rpm="http://linux.duke.edu/metadata/rpm">` + "\n")
+	fmt.Fprintf(&md, "  <revision>%d</revision>\n", ts)
+	for _, t := range rpmDataTypes {
+		var doc bytes.Buffer
+		doc.WriteString(xml.Header)
+		fmt.Fprintf(&doc, rpmRoots[t]+"\n", len(out[t]))
+		for _, raw := range out[t] {
+			doc.Write(raw)
+			doc.WriteString("\n")
+		}
+		doc.WriteString(rpmRootClose[t] + "\n")
+
+		gz := gzipDeterministic(doc.Bytes())
+		sum := sha256Hex(gz)
+		href := fmt.Sprintf("repodata/%s-%s.xml.gz", sum, t)
+		repo.Files[href] = gz
+
+		fmt.Fprintf(&md, "  <data type=\"%s\">\n", t)
+		fmt.Fprintf(&md, "    <checksum type=\"sha256\">%s</checksum>\n", sum)
+		fmt.Fprintf(&md, "    <open-checksum type=\"sha256\">%s</open-checksum>\n", sha256Hex(doc.Bytes()))
+		fmt.Fprintf(&md, "    <location href=\"%s\"/>\n", href)
+		fmt.Fprintf(&md, "    <timestamp>%d</timestamp>\n", ts)
+		fmt.Fprintf(&md, "    <size>%d</size>\n", len(gz))
+		fmt.Fprintf(&md, "    <open-size>%d</open-size>\n", doc.Len())
+		md.WriteString("  </data>\n")
+	}
+	md.WriteString("</repomd>\n")
+	repo.Repomd = md.Bytes()
+	return repo, nil
+}
+
+func gzipDeterministic(data []byte) []byte {
+	var buf bytes.Buffer
+	gz := gzip.NewWriter(&buf)
+	gz.Header = gzip.Header{OS: 255}
+	_, _ = gz.Write(data)
+	_ = gz.Close()
+	return buf.Bytes()
+}
+
+func sha256Hex(data []byte) string {
+	h := sha256.Sum256(data)
+	return hex.EncodeToString(h[:])
+}

internal/virtual/rpm_merger_test.go

@@ -0,0 +1,274 @@
+package virtual
+
+import (
+	"bytes"
+	"compress/gzip"
+	"crypto/sha256"
+	"encoding/hex"
+	"encoding/xml"
+	"fmt"
+	"io"
+	"strings"
+	"testing"
+
+	"github.com/klauspost/compress/zstd"
+	"github.com/ulikunitz/xz"
+)
+
+func primaryXML(pkgs ...string) []byte {
+	return []byte(`<?xml version="1.0" encoding="UTF-8"?>
+<metadata xmlns="http://linux.duke.edu/metadata/common" xmlns:rpm="http://linux.duke.edu/metadata/rpm" packages="` + fmt.Sprint(len(pkgs)) + `">
+` + strings.Join(pkgs, "\n") + `
+</metadata>`)
+}
+
+func primaryPkgXML(name, ver, pkgid, href string) string {
+	return `<package type="rpm">
+  <name>` + name + `</name>
+  <arch>x86_64</arch>
+  <version epoch="0" ver="` + ver + `" rel="1"/>
+  <checksum type="sha256" pkgid="YES">` + pkgid + `</checksum>
+  <location href="` + href + `"/>
+  <format>
+    <rpm:provides><rpm:entry name="` + name + `"/></rpm:provides>
+  </format>
+</package>`
+}
+
+func filelistsXML(pkgids ...string) []byte {
+	var b strings.Builder
+	b.WriteString(`<?xml version="1.0"?><filelists xmlns="http://linux.duke.edu/metadata/filelists" packages="1">`)
+	for _, id := range pkgids {
+		b.WriteString(`<package pkgid="` + id + `" name="x" arch="x86_64"><version epoch="0" ver="1" rel="1"/><file>/usr/bin/` + id + `</file></package>`)
+	}
+	b.WriteString(`</filelists>`)
+	return []byte(b.String())
+}
+
+func gunzip(t *testing.T, b []byte) []byte {
+	t.Helper()
+	r, err := gzip.NewReader(bytes.NewReader(b))
+	if err != nil {
+		t.Fatal(err)
+	}
+	out, err := io.ReadAll(r)
+	if err != nil {
+		t.Fatal(err)
+	}
+	return out
+}
+
+func mergedFile(t *testing.T, repo *RPMRepo, dtype string) []byte {
+	t.Helper()
+	for href, body := range repo.Files {
+		if strings.HasSuffix(href, "-"+dtype+".xml.gz") {
+			return gunzip(t, body)
+		}
+	}
+	t.Fatalf("no %s file in merged repo", dtype)
+	return nil
+}
+
+func TestMergeRPMDedupePriority(t *testing.T) {
+	members := []RPMMember{
+		{RemoteName: "first", Timestamp: 100, Data: map[string][]byte{
+			"primary":   primaryXML(primaryPkgXML("foo", "1.0", "aaa", "Packages/foo-1.0.rpm")),
+			"filelists": filelistsXML("aaa"),
+		}},
+		{RemoteName: "second", Timestamp: 200, Data: map[string][]byte{
+			"primary": primaryXML(
+				primaryPkgXML("foo", "1.0", "bbb", "Packages/foo-1.0-rebuilt.rpm"),
+				primaryPkgXML("bar", "2.0", "ccc", "Packages/bar-2.0.rpm"),
+			),
+			"filelists": filelistsXML("bbb", "ccc"),
+		}},
+	}
+	repo, err := MergeRPM(members)
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	primary := string(mergedFile(t, repo, "primary"))
+	if strings.Count(primary, "<name>foo</name>") != 1 {
+		t.Fatalf("duplicate NEVRA not deduped:\n%s", primary)
+	}
+	if !strings.Contains(primary, `href="first/Packages/foo-1.0.rpm"`) || strings.Contains(primary, "foo-1.0-rebuilt") {
+		t.Fatalf("first member should win duplicate NEVRA:\n%s", primary)
+	}
+	if !strings.Contains(primary, `href="second/Packages/bar-2.0.rpm"`) {
+		t.Fatalf("unique package from second member missing:\n%s", primary)
+	}
+	if !strings.Contains(primary, `packages="2"`) {
+		t.Fatalf("package count wrong:\n%s", primary)
+	}
+
+	filelists := string(mergedFile(t, repo, "filelists"))
+	if !strings.Contains(filelists, "/usr/bin/aaa") || !strings.Contains(filelists, "/usr/bin/ccc") || strings.Contains(filelists, "/usr/bin/bbb") {
+		t.Fatalf("filelists must follow the winning primary entries:\n%s", filelists)
+	}
+
+	other := string(mergedFile(t, repo, "other"))
+	if !strings.Contains(other, `packages="0"`) {
+		t.Fatalf("members without other data should yield an empty other.xml:\n%s", other)
+	}
+
+	if !strings.Contains(string(repo.Repomd), "<revision>200</revision>") {
+		t.Fatalf("revision should be the newest member timestamp:\n%s", repo.Repomd)
+	}
+}
+
+func TestMergeRPMOutputIsWellFormed(t *testing.T) {
+	repo, err := MergeRPM([]RPMMember{{RemoteName: "a", Data: map[string][]byte{
+		"primary": primaryXML(primaryPkgXML("foo", "1.0", "aaa", "Packages/foo.rpm")),
+	}}})
+	if err != nil {
+		t.Fatal(err)
+	}
+	var doc struct {
+		XMLName  xml.Name
+		Packages []struct {
+			Name     string `xml:"name"`
+			Provides []struct {
+				Name string `xml:"name,attr"`
+			} `xml:"format>provides>entry"`
+		} `xml:"package"`
+	}
+	if err := xml.Unmarshal(mergedFile(t, repo, "primary"), &doc); err != nil {
+		t.Fatal(err)
+	}
+	if doc.XMLName.Space != "http://linux.duke.edu/metadata/common" || len(doc.Packages) != 1 {
+		t.Fatalf("unexpected merged primary: %+v", doc)
+	}
+	if len(doc.Packages[0].Provides) != 1 || doc.Packages[0].Provides[0].Name != "foo" {
+		t.Fatalf("rpm: namespaced format lost: %+v", doc.Packages[0])
+	}
+}
+
+func TestMergeRPMHrefRewriting(t *testing.T) {
+	based := func(name, base string) string {
+		return `<package type="rpm"><name>` + name + `</name><arch>noarch</arch><version epoch="0" ver="1" rel="1"/>` +
+			`<checksum type="sha256" pkgid="YES">` + name + `</checksum><location xml:base="` + base + `" href="Packages/` + name + `.rpm"/></package>`
+	}
+	repo, err := MergeRPM([]RPMMember{{RemoteName: "gh", Bases: []string{"https://up.example/el9", "https://mirror.example/el9/"}, Data: map[string][]byte{
+		"primary": primaryXML(
+			primaryPkgXML("foo", "1.0", "aaa", "storytold/photocraft/releases/download/v1.0/foo&amp;bar.rpm"),
+			primaryPkgXML("lead", "1.0", "bbb", "/Packages/lead.rpm"),
+			based("root", "https://up.example/el9/"),
+			based("sub", "https://mirror.example/el9/extra"),
+			based("ext", "https://other.example/"),
+		),
+	}}})
+	if err != nil {
+		t.Fatal(err)
+	}
+	primary := string(mergedFile(t, repo, "primary"))
+	for _, want := range []string{
+		`<location href="gh/storytold/photocraft/releases/download/v1.0/foo&amp;bar.rpm"/>`,
+		`<location href="gh/Packages/lead.rpm"/>`,
+		`<location href="gh/Packages/root.rpm"/>`,
+		`<location href="gh/extra/Packages/sub.rpm"/>`,
+		`<location xml:base="https://other.example/" href="Packages/ext.rpm"/>`,
+	} {
+		if !strings.Contains(primary, want) {
+			t.Errorf("missing %s in:\n%s", want, primary)
+		}
+	}
+}
+
+func TestMergeRPMChecksums(t *testing.T) {
+	repo, err := MergeRPM([]RPMMember{{RemoteName: "a", Timestamp: 42, Data: map[string][]byte{
+		"primary": primaryXML(primaryPkgXML("foo", "1.0", "aaa", "Packages/foo.rpm")),
+	}}})
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	var md struct {
+		Data []struct {
+			Type         string `xml:"type,attr"`
+			Checksum     string `xml:"checksum"`
+			OpenChecksum string `xml:"open-checksum"`
+			Location     struct {
+				Href string `xml:"href,attr"`
+			} `xml:"location"`
+			Timestamp int64 `xml:"timestamp"`
+			Size      int   `xml:"size"`
+			OpenSize  int   `xml:"open-size"`
+		} `xml:"data"`
+	}
+	if err := xml.Unmarshal(repo.Repomd, &md); err != nil {
+		t.Fatal(err)
+	}
+	if len(md.Data) != 3 {
+		t.Fatalf("want primary/filelists/other, got %d entries", len(md.Data))
+	}
+	for _, d := range md.Data {
+		body, ok := repo.Files[d.Location.Href]
+		if !ok {
+			t.Fatalf("%s: location %q not served", d.Type, d.Location.Href)
+		}
+		sum := sha256.Sum256(body)
+		if hex.EncodeToString(sum[:]) != d.Checksum || len(body) != d.Size {
+			t.Errorf("%s: checksum/size do not match served bytes", d.Type)
+		}
+		open := gunzip(t, body)
+		osum := sha256.Sum256(open)
+		if hex.EncodeToString(osum[:]) != d.OpenChecksum || len(open) != d.OpenSize {
+			t.Errorf("%s: open-checksum/open-size do not match decompressed bytes", d.Type)
+		}
+		if d.Timestamp != 42 {
+			t.Errorf("%s: timestamp %d, want 42", d.Type, d.Timestamp)
+		}
+	}
+
+	again, _ := MergeRPM([]RPMMember{{RemoteName: "a", Timestamp: 42, Data: map[string][]byte{
+		"primary": primaryXML(primaryPkgXML("foo", "1.0", "aaa", "Packages/foo.rpm")),
+	}}})
+	if !bytes.Equal(repo.Repomd, again.Repomd) {
+		t.Error("merge must be deterministic so repomd checksums stay valid across requests")
+	}
+}
+
+func TestParseRepomd(t *testing.T) {
+	locs, ts, err := parseRepomd([]byte(`<repomd xmlns="http://linux.duke.edu/metadata/repo">
+  <data type="primary"><location href="repodata/p-primary.xml.zst"/><timestamp>10</timestamp></data>
+  <data type="primary_db"><location href="repodata/p.sqlite.bz2"/><timestamp>99</timestamp></data>
+  <data type="other"><location href="repodata/o-other.xml.gz"/><timestamp>20</timestamp></data>
+</repomd>`))
+	if err != nil {
+		t.Fatal(err)
+	}
+	if locs["primary"] != "repodata/p-primary.xml.zst" || locs["other"] != "repodata/o-other.xml.gz" || len(locs) != 2 {
+		t.Fatalf("unexpected locations: %v", locs)
+	}
+	if ts != 20 {
+		t.Fatalf("timestamp %d, want 20 (sqlite entries ignored)", ts)
+	}
+	if _, _, err := parseRepomd([]byte(`<repomd><data type="other"><location href="x"/></data></repomd>`)); err == nil {
+		t.Fatal("repomd without primary should error")
+	}
+}
+
+func TestDecompress(t *testing.T) {
+	plain := []byte("<metadata/>")
+
+	var xzBuf bytes.Buffer
+	xw, _ := xz.NewWriter(&xzBuf)
+	_, _ = xw.Write(plain)
+	_ = xw.Close()
+
+	zw, _ := zstd.NewWriter(nil)
+	zst := zw.EncodeAll(plain, nil)
+
+	for href, body := range map[string][]byte{
+		"p.xml":     plain,
+		"p.xml.gz":  gzipDeterministic(plain),
+		"p.xml.xz":  xzBuf.Bytes(),
+		"p.xml.zst": zst,
+	} {
+		got, err := decompress(href, body)
+		if err != nil || !bytes.Equal(got, plain) {
+			t.Errorf("%s: got %q, %v", href, got, err)
+		}
+	}
+}

migrations/0001_init.sql

@@ -0,0 +1,206 @@
+CREATE TABLE IF NOT EXISTS remotes (
+	name            TEXT PRIMARY KEY,
+	package_type    TEXT NOT NULL,
+	repo_type       TEXT DEFAULT 'remote',
+	base_url        TEXT NOT NULL DEFAULT '',
+	mirrorlist      TEXT[] DEFAULT '{}',
+	mirror_strategy TEXT NOT NULL DEFAULT 'round_robin',
+	description     TEXT DEFAULT '',
+	username        TEXT DEFAULT '',
+	password        TEXT DEFAULT '',
+	immutable_ttl   INTEGER DEFAULT 0,
+	mutable_ttl     INTEGER DEFAULT 3600,
+	check_mutable   BOOLEAN DEFAULT TRUE,
+	patterns            TEXT[] DEFAULT '{}',
+	blocklist           TEXT[] DEFAULT '{}',
+	mutable_patterns    TEXT[] DEFAULT '{}',
+	immutable_patterns  TEXT[] DEFAULT '{}',
+	ban_tags_enabled    BOOLEAN DEFAULT FALSE,
+	ban_tags            TEXT[] DEFAULT '{}',
+	quarantine_enabled  BOOLEAN DEFAULT FALSE,
+	quarantine_days     INTEGER DEFAULT 3,
+	stale_on_error      BOOLEAN DEFAULT TRUE,
+	releases_remote     TEXT DEFAULT '',
+	managed_by          TEXT DEFAULT '',
+	created_at      TIMESTAMPTZ DEFAULT NOW(),
+	updated_at      TIMESTAMPTZ DEFAULT NOW()
+);
+
+CREATE TABLE IF NOT EXISTS virtuals (
+	name            TEXT PRIMARY KEY,
+	package_type    TEXT NOT NULL,
+	description     TEXT DEFAULT '',
+	members         TEXT[] NOT NULL,
+	managed_by      TEXT DEFAULT '',
+	created_at      TIMESTAMPTZ DEFAULT NOW(),
+	updated_at      TIMESTAMPTZ DEFAULT NOW()
+);
+
+CREATE TABLE IF NOT EXISTS blobs (
+	content_hash    TEXT PRIMARY KEY,
+	s3_key          TEXT NOT NULL,
+	size_bytes      BIGINT NOT NULL,
+	content_type    TEXT DEFAULT 'application/octet-stream',
+	created_at      TIMESTAMPTZ DEFAULT NOW()
+);
+
+CREATE TABLE IF NOT EXISTS artifacts (
+	id              BIGSERIAL PRIMARY KEY,
+	remote_name     TEXT NOT NULL REFERENCES remotes(name) ON DELETE CASCADE,
+	path            TEXT NOT NULL,
+	content_hash    TEXT NOT NULL REFERENCES blobs(content_hash),
+	upstream_etag   TEXT DEFAULT '',
+	upstream_last_modified TIMESTAMPTZ,
+	first_seen_at   TIMESTAMPTZ DEFAULT NOW(),
+	last_fetched_at TIMESTAMPTZ DEFAULT NOW(),
+	last_accessed_at TIMESTAMPTZ DEFAULT NOW(),
+	fetch_count     BIGINT DEFAULT 1,
+	access_count    BIGINT DEFAULT 1,
+	UNIQUE(remote_name, path)
+);
+
+CREATE INDEX IF NOT EXISTS idx_artifacts_remote ON artifacts(remote_name);
+CREATE INDEX IF NOT EXISTS idx_artifacts_last_accessed ON artifacts(last_accessed_at);
+
+CREATE TABLE IF NOT EXISTS local_files (
+	id              BIGSERIAL PRIMARY KEY,
+	repo_name       TEXT NOT NULL,
+	file_path       TEXT NOT NULL,
+	content_hash    TEXT NOT NULL REFERENCES blobs(content_hash),
+	created_at      TIMESTAMPTZ DEFAULT NOW(),
+	UNIQUE(repo_name, file_path)
+);
+
+CREATE TABLE IF NOT EXISTS access_log (
+	id              BIGSERIAL PRIMARY KEY,
+	remote_name     TEXT NOT NULL,
+	path            TEXT NOT NULL,
+	cache_hit       BOOLEAN NOT NULL,
+	size_bytes      BIGINT DEFAULT 0,
+	upstream_ms     INTEGER DEFAULT 0,
+	client_ip       TEXT DEFAULT '',
+	created_at      TIMESTAMPTZ DEFAULT NOW()
+);
+
+CREATE INDEX IF NOT EXISTS idx_access_log_remote_time ON access_log(remote_name, created_at);
+
+ALTER TABLE remotes ADD COLUMN IF NOT EXISTS repo_type TEXT DEFAULT 'remote';
+ALTER TABLE remotes ADD COLUMN IF NOT EXISTS mirrorlist TEXT[] DEFAULT '{}';
+ALTER TABLE remotes ADD COLUMN IF NOT EXISTS mirror_strategy TEXT NOT NULL DEFAULT 'round_robin';
+ALTER TABLE remotes ADD COLUMN IF NOT EXISTS upstream_dial_timeout INTEGER DEFAULT 0;
+ALTER TABLE remotes ADD COLUMN IF NOT EXISTS upstream_tls_timeout INTEGER DEFAULT 0;
+ALTER TABLE remotes ADD COLUMN IF NOT EXISTS upstream_response_header_timeout INTEGER DEFAULT 0;
+
+CREATE TABLE IF NOT EXISTS rpm_metadata (
+	id              BIGSERIAL PRIMARY KEY,
+	repo_name       TEXT NOT NULL,
+	file_path       TEXT NOT NULL,
+	content_hash    TEXT NOT NULL,
+	name            TEXT NOT NULL,
+	epoch           INTEGER DEFAULT 0,
+	version         TEXT NOT NULL,
+	release         TEXT NOT NULL,
+	arch            TEXT NOT NULL,
+	summary         TEXT DEFAULT '',
+	description     TEXT DEFAULT '',
+	rpm_size        BIGINT DEFAULT 0,
+	installed_size  BIGINT DEFAULT 0,
+	license         TEXT DEFAULT '',
+	vendor          TEXT DEFAULT '',
+	build_group     TEXT DEFAULT '',
+	build_host      TEXT DEFAULT '',
+	source_rpm      TEXT DEFAULT '',
+	url             TEXT DEFAULT '',
+	packager        TEXT DEFAULT '',
+	requires        JSONB DEFAULT '[]',
+	provides        JSONB DEFAULT '[]',
+	conflicts       JSONB DEFAULT '[]',
+	obsoletes       JSONB DEFAULT '[]',
+	files           JSONB DEFAULT '[]',
+	changelogs      JSONB DEFAULT '[]',
+	created_at      TIMESTAMPTZ DEFAULT NOW(),
+	UNIQUE(repo_name, file_path)
+);
+
+CREATE INDEX IF NOT EXISTS idx_rpm_metadata_repo ON rpm_metadata(repo_name);
+
+ALTER TABLE rpm_metadata ADD COLUMN IF NOT EXISTS conflicts JSONB DEFAULT '[]';
+ALTER TABLE rpm_metadata ADD COLUMN IF NOT EXISTS obsoletes JSONB DEFAULT '[]';
+
+CREATE TABLE IF NOT EXISTS deb_metadata (
+	id              BIGSERIAL PRIMARY KEY,
+	repo_name       TEXT NOT NULL,
+	file_path       TEXT NOT NULL,
+	content_hash    TEXT NOT NULL,
+	name            TEXT NOT NULL,
+	version         TEXT NOT NULL,
+	architecture    TEXT NOT NULL,
+	control         TEXT NOT NULL,
+	size            BIGINT DEFAULT 0,
+	md5             TEXT DEFAULT '',
+	sha256          TEXT DEFAULT '',
+	created_at      TIMESTAMPTZ DEFAULT NOW(),
+	UNIQUE(repo_name, file_path)
+);
+
+CREATE INDEX IF NOT EXISTS idx_deb_metadata_repo ON deb_metadata(repo_name);
+
+CREATE TABLE IF NOT EXISTS alpine_metadata (
+	id                BIGSERIAL PRIMARY KEY,
+	repo_name         TEXT NOT NULL,
+	file_path         TEXT NOT NULL,
+	content_hash      TEXT NOT NULL,
+	checksum          TEXT NOT NULL,
+	name              TEXT NOT NULL,
+	version           TEXT NOT NULL,
+	arch              TEXT NOT NULL,
+	download_size     BIGINT DEFAULT 0,
+	installed_size    BIGINT DEFAULT 0,
+	description       TEXT DEFAULT '',
+	url               TEXT DEFAULT '',
+	license           TEXT DEFAULT '',
+	origin            TEXT DEFAULT '',
+	maintainer        TEXT DEFAULT '',
+	build_time        BIGINT DEFAULT 0,
+	commit_hash       TEXT DEFAULT '',
+	provider_priority TEXT DEFAULT '',
+	depends           TEXT DEFAULT '',
+	provides          TEXT DEFAULT '',
+	install_if        TEXT DEFAULT '',
+	created_at        TIMESTAMPTZ DEFAULT NOW(),
+	UNIQUE(repo_name, file_path)
+);
+
+CREATE INDEX IF NOT EXISTS idx_alpine_metadata_repo ON alpine_metadata(repo_name);
+CREATE INDEX IF NOT EXISTS idx_alpine_metadata_repo_arch ON alpine_metadata(repo_name, arch);
+
+CREATE TABLE IF NOT EXISTS github_rpm_sync_state (
+	remote_name        TEXT PRIMARY KEY,
+	etag               TEXT DEFAULT '',
+	last_synced_at     TIMESTAMPTZ,
+	sync_lease_owner   TEXT DEFAULT '',
+	sync_lease_expires TIMESTAMPTZ
+);
+
+CREATE TABLE IF NOT EXISTS github_deb_sync_state (
+	remote_name        TEXT PRIMARY KEY,
+	etag               TEXT DEFAULT '',
+	last_synced_at     TIMESTAMPTZ,
+	sync_lease_owner   TEXT DEFAULT '',
+	sync_lease_expires TIMESTAMPTZ
+);
+
+CREATE TABLE IF NOT EXISTS github_alpine_sync_state (
+	remote_name        TEXT PRIMARY KEY,
+	etag               TEXT DEFAULT '',
+	last_synced_at     TIMESTAMPTZ,
+	sync_lease_owner   TEXT DEFAULT '',
+	sync_lease_expires TIMESTAMPTZ
+);
+
+CREATE TABLE IF NOT EXISTS signing_keys (
+	purpose             TEXT PRIMARY KEY,
+	private_key_armor   TEXT NOT NULL,
+	key_id              TEXT NOT NULL,
+	created_at          TIMESTAMPTZ DEFAULT NOW()
+);

migrations/embed.go

@@ -0,0 +1,11 @@
+// Package migrations embeds the SQL schema files so artifactapi carries its own
+// schema and applies it at startup, with no externally mirrored copy to drift
+// out of sync.
+package migrations
+
+import "embed"
+
+// FS holds every numbered migration; lexical filename order is version order.
+//
+//go:embed *.sql
+var FS embed.FS

pkg/models/package_type.go

@@ -16,6 +16,7 @@ const (
 	PackagePuppet       PackageType = "puppet"
 	PackageTerraform    PackageType = "terraform"
 	PackageGoProxy      PackageType = "goproxy"
+	PackageCargo        PackageType = "cargo"
 	PackageGitHubRPM    PackageType = "github_rpm"
 	PackageGitHubDeb    PackageType = "github_deb"
 	PackageGitHubAlpine PackageType = "github_alpine"
@@ -33,6 +34,7 @@ var validPackageTypes = map[PackageType]bool{
 	PackagePuppet:       true,
 	PackageTerraform:    true,
 	PackageGoProxy:      true,
+	PackageCargo:        true,
 	PackageGitHubRPM:    true,
 	PackageGitHubDeb:    true,
 	PackageGitHubAlpine: true,

pkg/models/package_type_test.go

@@ -18,6 +18,7 @@ func TestPackageTypeValid(t *testing.T) {
 		models.PackagePuppet,
 		models.PackageTerraform,
 		models.PackageGoProxy,
+		models.PackageCargo,
 		models.PackageGitHubRPM,
 		models.PackageGitHubDeb,
 		models.PackageGitHubAlpine,

ui/src/components/UsageInstructions.tsx

@@ -228,6 +228,21 @@ go mod download`,
         },
       ];
 
+    case 'cargo':
+      return [
+        {
+          title: 'Point crates.io at this sparse registry',
+          language: 'toml',
+          code: `# ~/.cargo/config.toml
+[source.crates-io]
+replace-with = "${name}"
+
+[registries.${name}]
+index = "sparse+${proxy}/"`,
+          note: 'config.json is served by artifactapi so crate downloads also go through this remote.',
+        },
+      ];
+
     case 'puppet':
       return [
         {

ui/src/pages/Locals.tsx

@@ -17,6 +17,7 @@ const typeColors: Record<string, 'blue' | 'green' | 'yellow' | 'red' | 'default'
   puppet: 'yellow',
   terraform: 'blue',
   goproxy: 'green',
+  cargo: 'yellow',
 };
 
 export function Locals() {

ui/src/pages/Remotes.tsx

@@ -17,6 +17,7 @@ const typeColors: Record<string, 'blue' | 'green' | 'yellow' | 'red' | 'default'
   puppet: 'yellow',
   terraform: 'blue',
   goproxy: 'green',
+  cargo: 'yellow',
 };
 
 export function Remotes() {