unkin-agent
6a82b88947
agentws manages per-branch git worktrees for the unkin-agent user: it clones repos into the source root (~/src/prodenv/<repo>) so branches are visible in Ben's main checkout, and creates isolated worktrees under the worktree root (~/.cache/agentws/<repo>__<branch>). - New internal/agent/git.go: small, testable git helpers shelling out to the git binary (clone/fetch/worktree add/remove/list/prune, branch + config ops, porcelain parsing, path sanitizing). No go-git dependency. - New cmd/agentws: new / list / rm / clean / token / credential subcommands. Auth uses an ephemeral git credential helper (agentws credential get) so the ~1h Gitea token is never persisted in a remote URL or config; per-worktree config keeps the shared checkout's identity untouched. - Wire agentws into Makefile, scripts/build-rpm.sh, packaging/nfpm.yaml (binary + bash/zsh/fish completions), .woodpecker/release.yaml (cross-compile + assets) and .gitignore. - Tests: table tests for parsing/sanitizing/dir-naming, a real temp-git repo for the worktree lifecycle, and hermetic cmd tests (bad input + credential-helper host guard) that never touch the network. - Document agentws in README.md and AGENTS.md.
130 lines
5.9 KiB
Markdown
130 lines
5.9 KiB
Markdown
# AGENTS.md
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## Project Overview
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This repo ships several Gitea-automation CLIs in one RPM (`agent-tools`). They
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act as the `unkin-agent` user by minting a scoped Gitea token from Vault, so
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actions are attributed to the agent rather than to whoever runs the tool.
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- **`agentpr`** — create pull requests and post PR comments as `unkin-agent`
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(fixes the "tea posts as Ben" attribution problem). Subcommands:
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`pr create`, `pr comment`, `whoami`.
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- **`watchpr`** — poll one or more PRs and exit when a tracked PR changes
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meaningfully: it merges/closes, gets a new non-agent comment, its CI fails,
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or it loses mergeability. Benign transitions (CI pending→success, the agent's
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own comments) are ignored.
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- **`agentws`** — manage per-branch git worktrees for `unkin-agent`. Clones
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repos into the source root (`~/src/prodenv/<repo>`), creates worktrees under
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the worktree root (`~/.cache/agentws/<repo>__<branch>`), and authenticates
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clone/fetch/push via an ephemeral credential helper. Subcommands: `new`,
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`list`, `rm`, `clean`, `token`, `credential`.
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All tools are separate `main` packages under `cmd/` and share the
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`internal/agent` package (Vault AppRole login, Gitea REST client, PR-ref
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parsing, watch-state comparison, git worktree helpers).
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## Structure
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```
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cmd/agentpr/main.go # agentpr CLI (pr create / pr comment / whoami)
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cmd/watchpr/main.go # watchpr CLI (poll + meaningful-change exit)
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cmd/agentws/main.go # agentws CLI (new / list / rm / clean / token / credential)
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internal/agent/ # shared plumbing:
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token.go # env config + in-process Gitea-token cache
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vault.go # AppRole login + read gitea/creds/unkin-agent
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gitea.go # Gitea REST client (PR create/get, comments, status, whoami)
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parse.go # owner/repo#N and owner/repo parsing
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watch.go # PRState snapshot + MeaningfulChange comparison
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git.go # git worktree/clone/fetch helpers (os/exec, no go-git)
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go.mod # module git.unkin.net/unkin/agent-tools
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Makefile # build / test / lint / completions / rpm / version-bump
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packaging/nfpm.yaml # nfpm spec (envsubst-templated) for the RPM (all binaries)
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scripts/build-rpm.sh # generates completions + packages the RPM with nfpm
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.woodpecker/ # CI: build, test, pre-commit (PR) + release (tag)
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dist/ # build output: binaries, completions, RPM (not committed)
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```
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Every binary is a separate `main` package, so `make build` builds each with its
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own `-o` (a single `go build ./...` can't emit multiple mains to one file).
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## Token acquisition (shared)
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All tools call `agent.GiteaToken()`, which (once per process):
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1. AppRole login: `POST $VAULT_ADDR/v1/auth/approle/login` with `role_id` only
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(no `secret_id`) → `client_token`.
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2. `GET $VAULT_ADDR/v1/gitea/creds/unkin-agent` with `X-Vault-Token` → `.data.token`.
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Config via env (all have defaults):
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| Variable | Default | Purpose |
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| `VAULT_ADDR` | `https://vault.service.consul:8200` | Vault/OpenBao address |
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| `AGENT_APPROLE_ROLE_ID` | built-in default | AppRole role_id (overridable) |
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| `GITEA_URL` | `https://git.unkin.net` | Gitea base URL |
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| `AGENT_LOGIN` | `unkin-agent` | login whose comments watchpr ignores; agentws git identity |
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| `AGENTWS_SRC_ROOT` | `~/src/prodenv` | agentws source-of-truth checkout root |
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| `AGENTWS_ROOT` | `~/.cache/agentws` | agentws worktree root |
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| `AGENTWS_OWNER` | `unkin` | Gitea org that owns agentws-managed repos |
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### agentws git auth (ephemeral credential helper)
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Gitea tokens are ~1h ephemeral, so `agentws` never bakes one into a remote URL
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or config. `agentws token` prints a fresh token; `agentws credential get`
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implements the git credential protocol (reads the key=value request on stdin,
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and for the configured Gitea host only emits `username=unkin-agent` +
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`password=<fresh token>`). `agentws new` wires this per worktree — it enables
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`extensions.worktreeConfig` on the repo once, then writes `user.name`,
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`user.email` and `credential.helper = !<agentws> credential` to the
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**per-worktree** config so the shared checkout's identity/config is untouched.
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Clone/fetch pass the same helper transiently via `-c credential.helper=...`.
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Worktrees are created FROM `~/src/prodenv/<repo>` (`git worktree add`) so agent
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branches are visible in Ben's main checkout; `rm`/`clean` fetch there afterwards
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to keep the default branch current.
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## Build
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```bash
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make build # -> dist/agentpr, dist/watchpr, dist/agentws (CGO disabled, static)
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```
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Requires Go 1.21+. Dependency: `github.com/spf13/cobra` (CLI).
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## Packaging (RPM)
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```bash
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make rpm # build all binaries + package into dist/*.rpm via nfpm
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```
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`scripts/build-rpm.sh` generates bash/zsh/fish completions from the built
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binaries and bundles them alongside `/usr/bin/agentpr`, `/usr/bin/watchpr` and
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`/usr/bin/agentws`.
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On a `v*` tag the release pipeline builds the RPM and `PUT`s it to the
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artifactapi `rpm-internal` repo, then cuts a Gitea release.
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## Shell completions
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Cobra provides a `completion` subcommand for each binary
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(`agentpr completion bash`, etc.). The RPM installs them to the standard system
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paths (`/usr/share/bash-completion/completions/`,
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`/usr/share/zsh/site-functions/`, `/usr/share/fish/vendor_completions.d/`).
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## Testing
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```bash
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make test # go test -v -race ./...
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```
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`internal/agent` covers PR-ref parsing, the `MeaningfulChange` table (benign vs
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alerting transitions), request-body construction, and the Vault+Gitea client
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against `httptest` servers (fake AppRole login + gitea creds + PR create /
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comment / whoami / status). No live Vault/Gitea access is required for tests.
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## Gotchas
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- `watchpr` exits 0 with no output changes on `--once` (just prints state).
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- The token cache is process-wide (`sync.Once`); tests call the unexported
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`fetchGiteaToken` to avoid it.
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- CI "combined status" comes from `/commits/{sha}/status`; an empty head SHA
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yields an empty state without an API call.
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