conorbronsdon__avoid-ai-writing/.github/workflows/release.yml

name: Release

on:
  push:
    branches: [main]
    paths:
      - "CHANGELOG.md"
  workflow_dispatch:

permissions:
  contents: write

# Both jobs check-then-act against shared state: the release job reads
# `gh release view` before `gh release create`, and publish-npm reads
# `npm view` before `npm publish`. Overlapping runs can both read "not there
# yet" and then collide. Two runs carrying the same version turn one of them
# red; two runs carrying different versions can finish out of order and leave
# npm's `latest` pointing at the older one. Serializing puts the second run's
# checks after the first run's writes, so its `exists` guards see the truth and
# skip — the guards and this block do the job together, neither one alone.
#
# The group omits `github.ref` on purpose: the registry and the release list are
# repo-global, so a workflow_dispatch has to queue behind a main push too.
# Never cancel — a cancelled run can die between its check and its publish, or
# leave a GitHub release standing with nothing published against it.
concurrency:
  group: release
  cancel-in-progress: false

jobs:
  release:
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v6

      - name: Parse latest version from CHANGELOG.md
        id: changelog
        run: |
          HEADING_LINE="$(grep -m1 -E '^## \[[0-9]+\.[0-9]+\.[0-9]+\]' CHANGELOG.md || true)"
          if [ -z "$HEADING_LINE" ]; then
            echo "::error::Could not find a '## [X.Y.Z]' heading in CHANGELOG.md"
            exit 1
          fi
          VERSION="$(echo "$HEADING_LINE" | sed -E 's/^## \[([0-9]+\.[0-9]+\.[0-9]+)\].*/\1/')"
          echo "version=$VERSION" >> "$GITHUB_OUTPUT"
          echo "Latest CHANGELOG.md version: $VERSION"

          PKG_VERSION="$(node -p "require('./package.json').version" 2>/dev/null || echo unknown)"
          if [ "$PKG_VERSION" != "$VERSION" ]; then
            echo "::warning::package.json version ($PKG_VERSION) does not match the top CHANGELOG.md entry ($VERSION). This is pre-existing drift, not something this workflow fixes."
          fi

      - name: Check if the release tag already exists
        id: tagcheck
        env:
          GH_TOKEN: ${{ github.token }}
        run: |
          TAG="v${{ steps.changelog.outputs.version }}"
          if gh release view "$TAG" >/dev/null 2>&1; then
            echo "exists=true" >> "$GITHUB_OUTPUT"
            echo "Release $TAG already exists — nothing to do."
          else
            echo "exists=false" >> "$GITHUB_OUTPUT"
          fi

      - name: Extract this version's changelog section
        if: steps.tagcheck.outputs.exists == 'false'
        run: |
          VERSION="${{ steps.changelog.outputs.version }}"
          awk -v heading="## [$VERSION]" '
            $0 ~ /^## \[/ {
              if (found) exit
              if (index($0, heading) == 1) { found = 1; next }
            }
            found { print }
          ' CHANGELOG.md > /tmp/release-notes.md
          # Drop the "---" section separators and any leading blank lines.
          sed -i '/^---$/d' /tmp/release-notes.md
          sed -i '/./,$!d' /tmp/release-notes.md
          echo "--- release notes ---"
          cat /tmp/release-notes.md

      - name: Create GitHub release
        if: steps.tagcheck.outputs.exists == 'false'
        env:
          GH_TOKEN: ${{ github.token }}
        run: |
          VERSION="${{ steps.changelog.outputs.version }}"
          gh release create "v$VERSION" \
            --target "$GITHUB_SHA" \
            --title "v$VERSION" \
            --notes-file /tmp/release-notes.md

  # npm stayed frozen at 3.22.1 while the repo walked to 3.23.0 because this
  # workflow only ever created GitHub releases — there was no publish step at
  # all. This job closes that gap. It is independently idempotent (skips when
  # the version is already on npm), so re-runs and already-tagged pushes are
  # safe, and it publishes package.json's version only after proving it matches
  # the CHANGELOG heading the release job used — the drift this workflow
  # already warns about must block a publish, not ride into the registry.
  publish-npm:
    needs: release
    runs-on: ubuntu-latest
    permissions:
      contents: read
      id-token: write # npm Trusted Publishing (OIDC) + --provenance
    steps:
      - uses: actions/checkout@v6

      - uses: actions/setup-node@v4
        with:
          node-version: 22
          registry-url: https://registry.npmjs.org

      - name: Refuse to publish a version that disagrees with CHANGELOG.md
        run: |
          PKG_VERSION="$(node -p "require('./package.json').version")"
          HEADING_LINE="$(grep -m1 -E '^## \[[0-9]+\.[0-9]+\.[0-9]+\]' CHANGELOG.md || true)"
          if [ -z "$HEADING_LINE" ]; then
            echo "::error::Could not find a '## [X.Y.Z]' heading in CHANGELOG.md"
            exit 1
          fi
          CHANGELOG_VERSION="$(echo "$HEADING_LINE" | sed -E 's/^## \[([0-9]+\.[0-9]+\.[0-9]+)\].*/\1/')"
          if [ "$PKG_VERSION" != "$CHANGELOG_VERSION" ]; then
            echo "::error::package.json ($PKG_VERSION) != CHANGELOG.md ($CHANGELOG_VERSION) — fix the drift, then re-run. Publishing a mismatched version bakes the drift into the registry."
            exit 1
          fi

      - name: Skip if this version is already on npm
        id: npmcheck
        run: |
          PKG="$(node -p "require('./package.json').name")"
          VERSION="$(node -p "require('./package.json').version")"
          PUBLISHED="$(npm view "$PKG@$VERSION" version 2>/dev/null || true)"
          if [ "$PUBLISHED" = "$VERSION" ]; then
            echo "exists=true" >> "$GITHUB_OUTPUT"
            echo "$PKG@$VERSION already on npm — nothing to publish."
          else
            echo "exists=false" >> "$GITHUB_OUTPUT"
          fi

      # The version guard above proves package.json and CHANGELOG.md agree on
      # which *version* this is. It says nothing about which *commit*, and the
      # two come apart on exactly the recovery this job exists for: npm sat at
      # 3.22.1 while main walked eight commits past the v3.23.0 tag, so a
      # dispatch from main would ship post-tag work to npm as 3.23.0 while the
      # GitHub release for 3.23.0 names an older commit. Checking out the tag
      # here would fix the tarball and leave the attestation lying — npm builds
      # provenance from the run's github.sha, not from the worktree — and a
      # published version is immutable, so this fails closed instead. Only
      # runs when something is actually about to be published: a CHANGELOG.md
      # edit that does not bump the version is a normal reason to be off the
      # tag, and it must not turn the workflow red.
      - name: Refuse to publish a commit that is not the release tag
        if: steps.npmcheck.outputs.exists == 'false'
        run: |
          VERSION="$(node -p "require('./package.json').version")"
          TAG="v$VERSION"
          # The default checkout is depth-1 with no tags, so fetch the one tag
          # this resolves. A missing tag is a different failure from a moved one.
          if ! git fetch --no-tags --depth=1 origin "+refs/tags/$TAG:refs/tags/$TAG"; then
            echo "::error::Tag $TAG does not exist — check the release job's log, and that the release is not still a draft (a draft creates no tag). The release job creates $TAG before this job runs, so publishing without it would put $VERSION on npm with no GitHub release behind it."
            exit 1
          fi
          TAG_SHA="$(git rev-parse --verify "refs/tags/$TAG^{commit}")"
          HEAD_SHA="$(git rev-parse HEAD)"
          if [ "$TAG_SHA" != "$HEAD_SHA" ]; then
            echo "::error::HEAD ($HEAD_SHA) is not the commit tagged $TAG ($TAG_SHA) — bump to a new version and let the push to main tag and publish that. Publishing here would ship this commit to npm as $VERSION while the GitHub release for $VERSION names a different commit, and --provenance would sign the mismatch in."
            exit 1
          fi
          echo "HEAD is the commit tagged $TAG ($TAG_SHA) — safe to publish."

      - name: Test before publish
        if: steps.npmcheck.outputs.exists == 'false'
        run: npm test

      - name: Publish with provenance
        if: steps.npmcheck.outputs.exists == 'false'
        run: npm publish --provenance --access public