update_release.yml

name: Update AirSane Release

on:
  workflow_dispatch: # Allows manual trigger

  schedule:
    - cron: "0 3 * * 5" # 3 AM UTC every Friday

jobs:
  check_release_exists:
    name: Check whether upstream has any changes
    runs-on: ubuntu-latest
    outputs:
      release_exists: ${{ steps.check_release.outputs.exists }}
      tag: ${{ steps.fetch_release.outputs.tag }}
      release_date: ${{ steps.fetch_release.outputs.release_date }}
      release_title: ${{ steps.fetch_release.outputs.release_title }}
      release_url: ${{ steps.fetch_release.outputs.release_url }}
      commit_hash: ${{ steps.fetch_commit_sha.outputs.commit_hash }}
    steps:
      - name: Fetch latest release from AirSane
        id: fetch_release
        run: |
          echo "::group::Download latest release info to temporary file"
          tmpfile=$(mktemp)
          curl -sL https://api.github.com/repos/SimulPiscator/AirSane/releases/latest > "${tmpfile}"
          echo "::endgroup::"

          echo "::group::Extract meta information"
          tag=$(jq -r .tag_name "${tmpfile}")
          echo "Latest tag name: ${tag}"
          echo "tag=${tag}" | tee -a $GITHUB_OUTPUT
          echo "tag=${tag}" >> $GITHUB_ENV
          echo "release_date=$(jq -r .published_at "${tmpfile}" | cut -d'T' -f1)" | tee -a $GITHUB_OUTPUT
          echo "release_title=$(jq -r .name "${tmpfile}")" | tee -a $GITHUB_OUTPUT
          echo "release_url=$(jq -r .html_url "${tmpfile}")" | tee -a $GITHUB_OUTPUT
          echo "::endgroup::"

          echo "::group::Cleanup"
          rm -f "${tmpfile}"
          echo "::endgroup::"

      - name: Fetch commit SHA for the latest tag
        id: fetch_commit_sha
        run: |
          tag=${{ env.tag }}
          commit_hash=$(curl -sL "https://api.github.com/repos/SimulPiscator/AirSane/tags" | jq -r --arg TAG "$tag" '.[] | select(.name == $TAG) | .commit.sha')
          echo "commit_hash=${commit_hash}" | tee -a $GITHUB_OUTPUT

      - name: Checkout current repository
        uses: actions/checkout@v4
        with:
          fetch-depth: 0

      - name: Check if the release already exists
        id: check_release
        run: |
          tag=${{ env.tag }}
          if git rev-parse --verify "refs/tags/${tag}" >/dev/null 2>&1; then
            echo "Release ${tag} already exists."
            echo "exists=true" | tee -a $GITHUB_OUTPUT
          else
            echo "Release ${tag} does not yet exist."
            echo "exists=false" | tee -a $GITHUB_OUTPUT
          fi
      
  update_makefile:
    name: Update Makefile with latest hashes
    runs-on: ubuntu-latest
    needs: [check_release_exists]
    if: needs.check_release_exists.outputs.release_exists != 'true'
    steps:
      - name: Checkout current repository
        uses: actions/checkout@v4

      - name: Update Makefile with new release information
        id: update_makefile
        run: |
          echo "::group::Retrieve parameters"
          tag=${{ needs.check_release_exists.outputs.tag }}
          release_date=${{ needs.check_release_exists.outputs.release_date }}
          commit_hash=${{ needs.check_release_exists.outputs.commit_hash }}
          echo "::endgroup::"

          echo "::group::Replace values in Makefile"
          sed -i "s/^PKG_RELEASE:=.*/PKG_RELEASE:=1/" airsaned/Makefile
          sed -i "s/^PKG_VERSION:=.*/PKG_VERSION:=${tag#v}/" airsaned/Makefile
          sed -i "s/^PKG_SOURCE_VERSION:=.*/PKG_SOURCE_VERSION:=${commit_hash}/" airsaned/Makefile
          sed -i "s/^PKG_SOURCE_DATE:=.*/PKG_SOURCE_DATE:=${release_date}/" airsaned/Makefile
          sed -i "s/^PKG_MIRROR_HASH:=.*/PKG_MIRROR_HASH:=skip/" airsaned/Makefile
          echo "::endgroup::"

      - name: Check for changes
        id: check_changes
        run: |
          if git diff --exit-code; then
            echo "No changes to commit."
            echo "changes=false" | tee -a $GITHUB_OUTPUT
          else
            echo "changes=true" | tee -a $GITHUB_OUTPUT
          fi

      - name: Commit changes
        if: steps.check_changes.outputs.changes == 'true'
        run: |
          git config --local user.email "github-actions[bot]@users.noreply.github.com"
          git config --local user.name "github-actions[bot]"
          git commit -a -m "feat: update AirSane source reference to ${{ needs.check_release_exists.outputs.tag }}"

      - name: Push changes
        if: steps.check_changes.outputs.changes == 'true'
        uses: ad-m/github-push-action@v0.8.0
        with:
          github_token: ${{ secrets.GITHUB_TOKEN }}
          branch: master

  build_all:
    name: Build all packages for targets
    uses: ./.github/workflows/build.yml
    needs: update_makefile

  create_release:
    name: Create new release
    runs-on: ubuntu-latest
    needs: [check_release_exists, build_all]
    if: needs.check_release_exists.outputs.release_exists == 'false'
    steps:
      - uses: actions/download-artifact@v4.1.7
      - run: |
          mkdir release-packages
          find . -type d -name '*.ipk.d' | while IFS= read -r pkd; do
            cp -v $(find "$pkd" -name '*.ipk' -type f) release-packages/${pkd%.d}
          done
      - name: Create new release from tag
        uses: softprops/action-gh-release@v1
        with:
          tag_name: ${{ needs.check_release_exists.outputs.tag }}
          name: ${{ needs.check_release_exists.outputs.release_title }}
          draft: false
          prerelease: false
          body: |
            Update AirSane to version ${{ needs.check_release_exists.outputs.tag }}, released on ${{ needs.check_release_exists.outputs.release_date }}.
            [View source release here](${{ needs.check_release_exists.outputs.release_url }}).
          files: release-packages/*.ipk