name: release

# We trigger this on all tags and on the `master` branch. The job
# `changelog` will fail for tags that don’t have a
# changelog entry, so that seems good enough.
# For `master` this check is skipped as well as uploads.

on:
  push:
    tags:
    - '*'
    branches:
    - 'master'

jobs:
  # first check that the changelog is in good order and extract the changelog
  # This will fail for non-release tags.
  changelog:
    runs-on: 'ubuntu-latest'
    steps:
    - uses: actions/checkout@v3

    - name: Get the version
      id: get_version
      run: echo version=${{ github.ref_name }} >> "$GITHUB_OUTPUT"

    - name: Extract changelog
      id: read_changelog
      if: startsWith(github.ref, 'refs/tags/')
      run: |
        export VERSION='${{ steps.get_version.outputs.version }}'
        perl -0777 -ne '/^# Motoko compiler changelog\n\n## (??{quotemeta($ENV{VERSION})}) \(\d\d\d\d-\d\d-\d\d\)\n\n(.*?)^##/sm or die "Changelog does not look right for this version\n" ; print $1' Changelog.md > changelog-extract.md
        cat changelog-extract.md
        # need to mangle to use with $GITHUB_OUTPUT (previously: set-output),
        # see https://github.com/svenstaro/upload-release-action/blob/master/README.md
        # under "Example for feeding a file from repo to the body tag"
        echo "RELEASE_BODY=$(perl -0777 -p -e 's/%/%25/g; s/\n/%0A/g; s/\r/%0D/g' changelog-extract.md)" >> "$GITHUB_OUTPUT"

    outputs:
      release_body: ${{ steps.read_changelog.outputs.RELEASE_BODY }}

  # Now build the release on both linux and darwin
  build:
    strategy:
      matrix:
        os: [ ubuntu-latest, macos-latest ]
    needs: changelog
    runs-on: ${{ matrix.os }}
    steps:
    - uses: actions/checkout@v3
    - uses: cachix/install-nix-action@v22
    - uses: cachix/cachix-action@v12
      if: startsWith(github.ref, 'refs/heads/')
      with:
        name: ic-hs-test
        # NB: No auth token, we don’t want to push new stuff here
    - uses: cachix/cachix-action@v12
      if: startsWith(github.ref, 'refs/tags/')
      with:
        name: ic-hs-test
        authToken: '${{ secrets.CACHIX_AUTH_TOKEN }}'
    - run: cachix watch-store ic-hs-test &
    - name: "nix-build"
      # these are the dependencies listed in release-files. Sorry for the duplication
      run: |
        nix-build --max-jobs 1 --arg officialRelease true -A moc -A mo-ide -A mo-doc -A js.moc -A js.moc_interpreter

  # Finally do the upload. Hopefully the previous job has uploaded the
  # build product to the cachix cache, as we cannot build the darwin products on
  # linux
  release:
    if: startsWith(github.ref, 'refs/tags/')
    runs-on: 'ubuntu-latest'
    needs: [ changelog, build ]
    steps:
    - uses: actions/checkout@v3
    - uses: cachix/install-nix-action@v22
    - uses: cachix/cachix-action@v12
      with:
        name: ic-hs-test
        # NB: No auth token, we don’t expect to push new stuff here

    - run: nix-build --max-jobs 1 --arg officialRelease true release-files.nix

    - name: Upload Release Assets
      uses: svenstaro/upload-release-action@v2
      with:
        repo_token: ${{ secrets.GITHUB_TOKEN }}
        tag: ${{ github.ref }}
        file: result/*
        file_glob: true
        body: ${{ needs.changelog.outputs.release_body }}