autotagger.yml

name: Auto-tagger

on:
  push:
    branches:
      - trunk
      - prerelease
      - '*/branch-*'

jobs:
  tag:
    name: Tag
    runs-on: ubuntu-latest
    steps:
      - name: Check that the secret is set
        env:
          TOKEN: ${{ secrets.API_TOKEN_GITHUB }}
        run: |
          if [[ -z "$TOKEN" ]]; then
            echo '::error::The secret API_TOKEN_GITHUB must be set.'
            exit 1
          fi

      - uses: actions/checkout@v4
        with:
          # We want to potentially trigger "tag" events, but the default GITHUB_TOKEN
          # explicitly does not trigger events.
          token: ${{ secrets.API_TOKEN_GITHUB }}

      - name: Check branch
        id: check-branch
        run: |
          PREFIXES=
          if [[ -e composer.json ]]; then
            PREFIXES=$(jq -r '.extra["release-branch-prefix"] // "" | if type == "array" then .[] else . end' composer.json)
          fi
          if [[ -z "$PREFIXES" && "$GITHUB_REF" != "refs/heads/trunk" && "$GITHUB_REF" != "refs/heads/prerelease" ]]; then
            echo "::error::Expected to be called for \"refs/heads/trunk\" or \"refs/heads/prerelease\", not \"$GITHUB_REF\""
            exit 1
          elif [[ -n "$PREFIXES" && ( "$GITHUB_REF" == "refs/heads/trunk" || "$GITHUB_REF" == "refs/heads/prerelease" ) ]]; then
            echo "::notice::Ignoring push to $GITHUB_REF, as this project has a release branch prefix set (\"${PREFIXES//$'\n'/'" "'}\")"
            echo "run=false" >> "$GITHUB_OUTPUT"
          else
            if [[ -n "$PREFIXES" ]]; then
              OK=false
              while IFS= read -r P; do
                [[ "$GITHUB_REF" == "refs/heads/$P/branch-"* ]] && OK=true
              done <<<"$PREFIXES"
              if ! $OK; then
                echo "::error::Expected to be called for \"refs/heads/\$PREFIX/branch-*\" for a prefix in \"${PREFIXES//$'\n'/'" "'}\", not \"$GITHUB_REF\""
                exit 1
              fi
            fi

            echo "Push to \"$GITHUB_REF\" ok"
            echo "run=true" >> "$GITHUB_OUTPUT"
          fi

      - name: Check version
        id: version
        if: steps.check-branch.outputs.run == 'true'
        run: |
          VER=$(sed -nEe 's/^## \[?([^]]*)\]? - .*/\1/;T;p;q' CHANGELOG.md || true)
          echo "Version from changelog is ${VER:-<unknown>}"
          echo "version=$VER" >> "$GITHUB_OUTPUT"
          if [[ "$VER" =~ ^[0-9]+(\.[0-9]+)+(-[a-z0-9._-]+)?$ && ! "$VER" =~ -(alpha|a\.[0-9]*[02468])$ ]]; then
            echo "Version $VER ok to tag"
            echo "run=true" >> "$GITHUB_OUTPUT"
          else
            echo "::notice::Not tagging version $VER"
            echo "run=false" >> "$GITHUB_OUTPUT"
          fi

      - name: Check deps
        id: check-deps
        if: steps.check-branch.outputs.run == 'true' && steps.version.outputs.run == 'true'
        run: |
          RUN=true
          if [[ -e composer.json ]]; then
            TMP=$(jq -r '.require // {} | to_entries[] | select( .value | test( "-(alpha|a\\.[0-9]*[02468])$" ) ) | "\(.key) (\(.value))"' composer.json)
            if [[ -n "$TMP" ]]; then
              echo "::notice::Not tagging due to -alpha deps on ${TMP//$'\n'/ }"
              RUN=false
            fi
          fi
          echo "run=$RUN" >> "$GITHUB_OUTPUT"

      - name: Tag
        if: steps.check-branch.outputs.run == 'true' && steps.version.outputs.run == 'true' && steps.check-deps.outputs.run == 'true'
        env:
          VER: ${{ steps.version.outputs.version }}
        run: |
          export GIT_AUTHOR_NAME=matticbot
          export GIT_AUTHOR_EMAIL=matticbot@users.noreply.github.com
          export GIT_COMMITTER_NAME=matticbot
          export GIT_COMMITTER_EMAIL=matticbot@users.noreply.github.com
          if [[ -e composer.json ]] && ! jq -e 'if try ( .extra.autotagger | has("v") ) catch false then .extra.autotagger.v else true end' composer.json >/dev/null; then
            TAG="$VER"
          else
            TAG="v$VER"
          fi
          echo "::notice::Tagging $TAG"
          git tag "$TAG"
          git push origin "$TAG"
          if [[ -e composer.json ]] && jq -e '.extra.autotagger.major?' composer.json >/dev/null; then
            echo "::notice::Tagging ${TAG%%.*}"
            git tag --force "${TAG%%.*}"
            git push --force origin "${TAG%%.*}"
          fi