name: Release

on:
  workflow_call:
    inputs:
      ref:
        default: ${{ github.ref }}
        type: string

jobs:
  permissions:
    name: Check permissions
    runs-on: ubuntu-latest
    outputs:
      release_allowed: >
        ${{
          github.repository_owner == 'tree-sitter' &&
          steps.maintainer.outputs.is_maintainer == 'true' &&
          steps.local_branch.outputs.is_local == 'true'
        }}
    steps:

    - name: Initated by a maintainer
      id: maintainer
      env:
        GH_TOKEN: ${{ github.token }}
        repo: ${{ github.repository }}
        actor: ${{ github.actor }}
      run: |
        maintainer=$(
          gh api "/repos/${repo}/collaborators" |
          jq ".[] | {login, maintainer: .permissions | .maintain} | select(.login == \"${actor}\") | .maintainer"
        );
        if [ "$maintainer" == "true" ]; then
          echo "@${actor} has maintainer level permissions :rocket:" >> $GITHUB_STEP_SUMMARY;
          echo "is_maintainer=true" >> $GITHUB_OUTPUT
        fi

    - name: The ref branch is local
      id: local_branch
      env:
        is_local: ${{ github.event.pull_request.head.repo.full_name == github.repository }}
      run: |
        echo "is_local=${is_local}" >> $GITHUB_OUTPUT

  release:
    name: Release
    needs: permissions
    if: needs.permissions.outputs.release_allowed
    runs-on: ubuntu-latest
    permissions:
      contents: write
    steps:

      - name: Checkout source code
        uses: actions/checkout@v3
        with:
          ref: ${{ inputs.ref }}

      - name: Download build artifacts
        uses: actions/download-artifact@v3
        with:
          path: artifacts

      - name: Display structure of downloaded files
        run: ls -lR
        working-directory: artifacts

      - name: Prepare release artifacts
        run: |
          mkdir -p target
          mv artifacts/tree-sitter.wasm/* target/
          rm -r artifacts/tree-sitter.wasm
          for platform in $(cd artifacts; ls | sed 's/^tree-sitter\.//'); do
            exe=$(ls artifacts/tree-sitter.$platform/tree-sitter*)
            gzip --stdout --name $exe > target/tree-sitter-$platform.gz
          done
          rm -rf artifacts
          ls -l target/

      - name: Get tag name from a release/v* branch name
        id: tag_name
        env:
          tag: ${{ github.head_ref }}
        run: echo "tag=${tag#release/}" >> $GITHUB_OUTPUT

      - name: Add a release tag
        env:
          ref: ${{ inputs.ref }}
          tag: ${{ steps.tag_name.outputs.tag }}
          message: "Release ${{ steps.tag_name.outputs.tag }}"
        run: |
          git config user.name "$(git log -1 --pretty='%cn')"
          git config user.email "$(git log -1 --pretty='%ce')"
          git tag -a "$tag" HEAD -m "$message"
          git push origin "$tag"

      - name: Create release
        uses: softprops/action-gh-release@v1
        with:
          name: ${{ steps.tag_name.outputs.tag }}
          tag_name: ${{ steps.tag_name.outputs.tag }}
          fail_on_unmatched_files: true
          files: |
            target/tree-sitter-*.gz
            target/tree-sitter.wasm
            target/tree-sitter.js

      - name: Merge release PR
        env:
          GH_TOKEN: ${{ github.token }}
        run: |
          gh pr merge ${{ github.event.pull_request.html_url }} --match-head-commit $(git rev-parse HEAD) --merge --delete-branch