git-cow 0.2.2

Git worktrees that share files with a template through copy-on-write clones (APFS, XFS, btrfs)
Documentation 
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name: ci

on:
  push:
    branches: [main]
  pull_request:

jobs:
  test:
    strategy:
      matrix:
        include:
          - {os: macos-latest, fs: apfs}
          - {os: ubuntu-latest, fs: xfs}
          - {os: ubuntu-latest, fs: ext4}
    runs-on: ${{ matrix.os }}
    steps:
      - uses: actions/checkout@v4
      - uses: dtolnay/rust-toolchain@stable
        with:
          components: clippy, rustfmt
      - run: cargo fmt --check
      - run: cargo clippy --all-targets -- -D warnings

      # The clone path only runs on a volume that clones, so the tests fail if the probe finds none
      - name: XFS reflink volume
        if: matrix.fs == 'xfs'
        run: |
          command -v mkfs.xfs >/dev/null || sudo apt-get install -y xfsprogs
          truncate -s 4G /tmp/xfs.img
          mkfs.xfs -m reflink=1 /tmp/xfs.img
          sudo mkdir -p /mnt/xfs && sudo mount -o loop /tmp/xfs.img /mnt/xfs
          sudo mkdir /mnt/xfs/tmp && sudo chown -R "$USER" /mnt/xfs
          echo "TMPDIR=/mnt/xfs/tmp" >> "$GITHUB_ENV"
          echo "GIT_COW_EXPECT_CLONE=1" >> "$GITHUB_ENV"
      - name: Require cloning on APFS
        if: matrix.fs == 'apfs'
        run: echo "GIT_COW_EXPECT_CLONE=1" >> "$GITHUB_ENV"

      - run: cargo test

  # On main: next version from conventional commits (feat minor, breaking major, else patch), publish, tag, release
  release:
    needs: test
    if: github.event_name == 'push' && github.ref == 'refs/heads/main'
    runs-on: ubuntu-latest
    permissions:
      contents: write
    steps:
      - uses: actions/checkout@v4
        with:
          fetch-depth: 0
      - uses: dtolnay/rust-toolchain@stable

      - name: Next version
        id: version
        run: |
          LAST=$(git describe --tags --abbrev=0 2>/dev/null || true)
          SUBJECTS=$(git log ${LAST:+"$LAST"..HEAD} --pretty=format:%s)
          if [ -z "$SUBJECTS" ] || ! echo "$SUBJECTS" | grep -qvE '^(chore|docs|ci)(\(.*\))?:'; then
            echo "nothing to release since ${LAST:-the start}"
            exit 0
          fi
          if [ -z "$LAST" ]; then
            V=0.1.0
          else
            IFS=. read -r MA MI PA <<< "${LAST#v}"
            if echo "$SUBJECTS" | grep -qE '^(BREAKING CHANGE:|breaking(\(.*\))?:)'; then V="$((MA + 1)).0.0"
            elif echo "$SUBJECTS" | grep -qE '^feat(\(.*\))?:'; then V="$MA.$((MI + 1)).0"
            else V="$MA.$MI.$((PA + 1))"; fi
          fi
          echo "version=$V" >> "$GITHUB_OUTPUT"
          echo "releasing v$V"

      # Publish first: a tag without a crate is worse than a crate without a tag, and a retry then tags it
      - name: Publish to crates.io
        if: steps.version.outputs.version
        env:
          CARGO_REGISTRY_TOKEN: ${{ secrets.CARGO_REGISTRY_TOKEN }}
          VERSION: ${{ steps.version.outputs.version }}
        run: |
          sed -i "0,/^version = .*/s//version = \"$VERSION\"/" Cargo.toml
          cargo publish --allow-dirty

      - name: Tag and release
        if: steps.version.outputs.version
        env:
          GH_TOKEN: ${{ github.token }}
          VERSION: ${{ steps.version.outputs.version }}
        run: gh release create "v$VERSION" --target "$GITHUB_SHA" --title "v$VERSION" --generate-notes