release.yml

on:
  push:
    tags:
      - "*"

jobs:
  check-main-branch:
    runs-on: ubuntu-latest
    outputs:
      contains: ${{ steps.check.outputs.contains }}
    steps:
      - uses: actions/checkout@v4
        with:
          ref: main
          fetch-depth: 0
      - id: check
        run: |
          branches=$(git branch --contains "$GITHUB_REF_NAME")
          for branch in $branches; do
            if [[ "$branch" == "main" ]]; then
              echo "contains=true" >> "$GITHUB_OUTPUT"
              exit 0
            fi
          done
          echo "contains=false" >> "$GITHUB_OUTPUT"

  build-book:
    runs-on: ubuntu-latest
    env:
      # FIXME: duplicate of .github/workflows/main.yml:112
      MDBOOK_VERSION: v0.4.36
    steps:
      - uses: actions/checkout@v4
        with:
          ref: ${{ github.ref }}
      - run: |
          curl -fsSL "$REPO_URL$RELEASE_DL_PATH/$MDBOOK_VERSION/$FILENAME" | tar xz
        env:
          REPO_URL: https://github.com/rust-lang/mdBook
          RELEASE_DL_PATH: /releases/download
          FILENAME: mdbook-${{ env.MDBOOK_VERSION }}-x86_64-unknown-linux-gnu.tar.gz
      - run: |
          ./mdbook build
          tar czf book.tar.gz book
      - uses: actions/upload-artifact@v4
        with:
          name: book-archive
          path: ./book.tar.gz

  create-release:
    runs-on: ubuntu-latest
    needs: check-main-branch
    if: ${{ needs.check-main-branch.outputs.contains == 'true' }}
    steps:
      - uses: actions/checkout@v4
        with:
          ref: ${{ github.ref }}
      - uses: actions/download-artifact@v4
        with:
          name: book-archive
      - run: |
          gh release create $GITHUB_REF_NAME book.tar.gz \
            -d -t $GITHUB_REF_NAME -n "" --verify-tag