main.yml

name: PR build

on: pull_request

jobs:
  determine-packages:
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v3
        with:
          fetch-depth: 0
      - name: determine packages to build
        id: set-matrix
        shell: bash
        run: |
          define_matrix () {
            comm -12 "$2" "$3" >"$4" &&
            cat "$4" &&
            sed -e 's/\/$//' -e 's/.*/"&", /' -e '$s/, $//' <"$4" >list.txt &&
            echo "$1=[$(test ! -s list.txt && echo '""' || tr -d '\n' <list.txt)]" >>$GITHUB_OUTPUT
          }

          git diff ${{github.event.pull_request.base.sha}}... --name-only |
          sed -e 's|[^/]*$||' |
          sort -u >touched.txt &&

          git ls-files \*/PKGBUILD | sed 's|[^/]*$||' | sort >directories.txt &&
          define_matrix matrix directories.txt touched.txt packages.txt
    outputs:
      matrix: ${{ steps.set-matrix.outputs.matrix }}

  build:
    needs: determine-packages
    runs-on: windows-latest
    if: needs.determine-packages.outputs.matrix != '[""]'
    strategy:
      fail-fast: false
      matrix:
        directory: ${{ fromJSON(needs.determine-packages.outputs.matrix) }}
    steps:
      - uses: actions/checkout@v3
      - uses: git-for-windows/setup-git-for-windows-sdk@v1
        with:
          flavor: full
      - name: get GPG key(s)
        shell: bash
        run: |
          cd "${{ matrix.directory }}" &&
          . PKGBUILD &&
          for key in "${validpgpkeys[@]}" 57759F748D223F034D8BE870BB3AA74136C569BB
          do
            gpg $GPG_OPTIONS --recv-keys --batch --yes --keyserver hkp://keyserver.ubuntu.com "$key" &&
            echo "$key:6:" | gpg $GPG_OPTIONS --import-ownertrust ||
            exit 1
          done
      - name: build ${{ matrix.directory }}
        shell: bash
        run: |
          # reduce time required to install packages by disabling pacman's disk space checking
          sed -i 's/^CheckSpace/#CheckSpace/g' /etc/pacman.conf &&

          top_dir=$PWD &&
          cd "${{ matrix.directory }}" &&
          MAKEFLAGS=-j8 makepkg-mingw -s --noconfirm &&

          artifacts="$(basename "${{ matrix.directory }}")-artifacts" &&
          mkdir -p "$top_dir/$artifacts" &&
          mv *.tar.* "$top_dir/$artifacts"/ &&
          echo "artifacts=$artifacts" >>$GITHUB_ENV
      - uses: actions/upload-artifact@v3
        with:
          name: ${{ env.artifacts }}
          path: ${{ env.artifacts }}
      - name: ensure that the Git worktree is still clean
        shell: bash
        run: |
          cd "${{ matrix.directory }}" &&
          if ! git update-index --ignore-submodules --refresh ||
            ! git diff-files --ignore-submodules ||
            ! git diff-index --cached --ignore-submodules HEAD
          then
            echo "::error::Uncommitted changes after build!" >&2
            git diff
            exit 1
          fi