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eSliderandCursor 36f0ed9b52 docs: add CONTRIBUTING guide and expand README

Add CONTRIBUTING.md for testing, PR checks, and release-please flow; link from
README and AGENTS. Document envc bash sourcing (set -a, source <(...)) for YAML/INI.

Co-authored-by: Cursor <cursoragent@cursor.com>

2026-05-03 10:29:27 +01:00

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Contributing to go-config

Thank you for helping improve this module. This document covers testing expectations, local checks, and how releases are cut (so nobody tags or edits versions by hand).

For repository purpose, public API notes, and agent-oriented context, see AGENTS.md.

Testing policy

This project follows the eSlider no synthetic mocks policy (see .cursor/rules/no-synthetic-mocks.mdc):

Unit tests — pure inputs for merge, keymap, structconv, env flat-map helpers.
httptest — allowed only to test our HTTP client behaviour in internal/source (not third-party API emulation).
Fixtures — real files under fixtures/; testfixtures resolves paths from module root.

Before you open a pull request

Run the same checks CI will run (adjust paths if your checkout layout differs):

go mod tidy
go vet ./...
go test -race -shuffle=on -count=1 ./...
golangci-lint run --timeout 5m

Commit messages

Use Conventional Commits (feat:, fix:, perf:, feat!: or BREAKING CHANGE: for breaking changes, etc.). Release automation reads these messages to choose the next SemVer.

Release and versioning

Versions are computed from git history, not edited in Go source. Do not create release tags manually or bump version constants in code.

CI on every change

Every push and pull request runs test.yml (matrix: Go 1.22, 1.23, stable × linux / macOS / windows, with -race -shuffle=on) and lint.yml (go vet + golangci-lint).

Release Please and GoReleaser

On pushes to main, release-please.yml parses commits since the last tag and opens (or updates) a release pull request that bumps CHANGELOG.md and .release-please-manifest.json to the next SemVer.
Merging that release PR creates the git tag vX.Y.Z and a GitHub Release.
The tag triggers release.yml, which runs GoReleaser to cross-compile the envc binary (linux / darwin / windows × amd64 / arm64), injects -X main.version={{.Version}} (and related ldflags) at link time, and attaches archives plus checksums.txt to the release.

Local go install builds of envc report dev for envc version unless you pass your own -ldflags; release binaries show the released version.

Architecture decisions

Repo-local ASRs: docs/asr/README.md. Broader eSlider Go module conventions: inventar/docs/asr/ASR-0008.md (see AGENTS.md — Related).

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