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releaser/CLAUDE.md
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feat(notify): release v1.8.0 — Slack/Teams/Google Chat/Telegram/webhook notifications
- Add internal/notify package: best-effort release notifications to Slack, Microsoft Teams, Google Chat, Telegram, and a generic JSON webhook; every target is independently opt-in and a failed notification never fails the release
- Add notify config section (slack_webhook_url, teams_webhook_url, google_chat_webhook_url, telegram_bot_token/telegram_chat_id, webhook_url) with matching env var fallbacks; 100% coverage plus FuzzMessagePayloads
- Wire notification sending into run() — fires after tag+push (including --no-release), skipped on --no-push/--no-commit since nothing was published yet
- Document the notify section in README, Hugo docs, and .releaser.yml template; update CLAUDE.md architecture/fuzzing tables
- Also commit the Apache License 2.0 docs-site footer link (docs/hugo.toml geekdocContentLicense), left uncommitted from a prior change

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
2026-07-12 13:55:57 +02:00

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# CLAUDE.md — project guidelines for releaser
## Overview
`releaser` is a single-binary Go tool for GitFlow-based release automation. It targets Conventional Commits, versioned release branches (`release/X.Y`), and GitLab / GitHub release creation.
## Architecture
```
cmd/main.go — CLI entrypoint (cobra), run() pipeline, verbose output
internal/branch/ — branch name parser → major/minor
internal/changelog/ — CHANGELOG.md writer
internal/commits/ — Conventional Commits parser (non-strict)
internal/config/ — .releaser.yml loader + env var overlay + source tracking
internal/ghclient/ — minimal GitHub Releases API client
internal/gitutil/ — go-git helpers: tag discovery, commit walker, push
internal/glclient/ — minimal GitLab Releases API client
internal/gradle/ — build.gradle / build.gradle.kts version reader/writer
internal/maven/ — pom.xml version reader/writer
internal/node/ — package.json version reader/writer
internal/notes/ — release notes body generator
internal/notify/ — Slack / Teams / Google Chat / Telegram / webhook release notifications
internal/pyproject/ — pyproject.toml version reader/writer
internal/version/ — semver next-version calculator
```
## Code conventions
- **No third-party test frameworks** — stdlib `testing` only.
- **No interfaces for mocking** — inject function variables (`var absPath = filepath.Abs`) to test error paths.
- **No comments explaining what** — only comments explaining *why* (hidden constraints, invariants, non-obvious workarounds).
- **No error handling for impossible paths** — trust internal invariants; only validate at system boundaries.
- **No abstractions ahead of need** — three similar lines beats a premature helper.
## Test coverage
**100% per-package statement coverage is required** across all packages. Run:
```bash
go test ./... -cover
```
Every package must show `coverage: 100.0% of statements`.
Strategies used in this project:
- **Error path injection**: override `var absPath`, `var gitAllCommits`, etc. to return injected errors.
- **Filesystem tricks**: `os.Mkdir` where a file is expected (invisible to go-git dirty check; fails os.WriteFile/os.ReadFile); `os.Chmod(..., 0444)` to make files read-only.
- **Null byte paths**: `"path\x00name"` causes `os.Stat` to return `EINVAL` (not `ErrNotExist`), useful for testing stat-error paths that differ from file-not-found.
- **In-memory git repos**: use go-git `PlainInit` + local bare remote for push tests.
- **Direct function calls**: call unexported helpers (e.g. `printVerboseConfig`) directly with crafted inputs to cover branches that are dead via normal CLI flow.
## Fuzzing
**Every package that parses free-form text or reads/writes arbitrary file content must have at least one fuzz test.** Run the full seed corpus with:
```bash
go test -run='^Fuzz' ./...
```
All seed cases must pass. The table below is authoritative — keep it in sync when adding packages or parsers:
| Package | Fuzz target(s) | Why |
|---------|---------------|-----|
| `internal/branch` | `FuzzParse` | parses branch name strings |
| `internal/changelog` | `FuzzUpdate` | rewrites arbitrary existing file content |
| `internal/commits` | `FuzzParse` | parses arbitrary commit message strings |
| `internal/gradle` | `FuzzReadVersion`, `FuzzWriteVersion` | reads/rewrites arbitrary Gradle build file content |
| `internal/pyproject` | `FuzzReadVersion`, `FuzzWriteVersion` | reads/rewrites arbitrary pyproject.toml content |
| `internal/glclient` | `FuzzEncodeProjectPath` | encodes arbitrary project path strings |
| `internal/maven` | `FuzzReadVersion`, `FuzzReplaceProjectVersion` | reads/rewrites arbitrary XML file content |
| `internal/node` | `FuzzReadVersion`, `FuzzWriteVersion` | reads/rewrites arbitrary JSON file content |
| `internal/notes` | `FuzzGenerate` | generates notes from arbitrary commit messages |
| `internal/notify` | `FuzzMessagePayloads` | builds notification JSON payloads from arbitrary release notes |
Packages **not** requiring fuzz tests (no free-form text parsing): `internal/config` (yaml.v3 handles parsing), `internal/ghclient` (HTTP client, no text parsing), `internal/gitutil` (git operations), `internal/version` (typed inputs only), `cmd` (CLI orchestration). When adding a new package, check whether it parses text or rewrites files — if yes, add a row above.
Fuzz seed corpus guidelines:
- Include a realistic happy-path input as the first seed.
- Include empty string, binary/non-UTF-8 bytes (`"\x00\xff"`), and inputs that stress known branches (e.g. existing `## [version]` heading for changelog).
- The fuzz body must never assert on return values — only verify no panic.
## Documentation sync
**Every change that adds, changes, or removes a feature, flag, or config key must update all of the following in the same commit:**
- `README.md` — features list, usage examples, option tables, version badge
- `CHANGELOG.md` — new dated `## [X.Y.Z]` entry (see `/release` skill for format)
- `ROADMAP.md` — mark shipped items `✓`, add a "Shipped in vX.Y.Z" note, drop outdated caveats
- Hugo docs under `docs/content/` (`installation.md`, `usage.md`, `configuration.md`, `ci-integration.md`, `changelog.md`) — whichever pages describe the changed behavior
Treat these as one unit: a PR that changes CLI behavior or config but leaves any of the above stale is incomplete. `docs/content/changelog.md` only needs an entry for tagged (minor/major) releases, matching the pattern already in that file — patch-only releases are covered by the root `CHANGELOG.md` but not duplicated there.
## Dependency rules
- **No new external dependencies** unless absolutely necessary. The project deliberately avoids pulling in large ecosystems.
- go-git (`github.com/go-git/go-git/v5`) for all git operations.
- cobra for CLI parsing.
- gopkg.in/yaml.v3 for config.
## Config design
- New config fields go in the appropriate `*Config` struct in `internal/config/config.go`.
- `defaultSources()` must be updated to include every new key.
- `LoadWithSources` overlay detection must cover every new field.
- `printVerboseConfig` in `cmd/main.go` must show every new config value.
## Multi-value config pattern
When a config supports both a single value and multiple values (like `pom_path` / `pom_paths`):
- Single field: `PomPath string`
- Multi field: `PomPaths []string`
- `EffectivePomPaths()` method: `PomPaths` wins if non-empty, else `PomPath` if set, else default.
- `--pom` CLI flag clears `PomPaths` and sets `PomPath` only.