name: Kernel-Auto-Release

on:
  workflow_dispatch:
    inputs:
      commit_id:
        description: 'Commit ID'
        required: true
        default: 'HEAD'
      version_number:
        description: 'Version Number (Ex. 10.4.4)'
        required: true
        default: '10.4.4'
      main_br_version:
        description: "Version String for task.h on main branch (leave empty to leave as-is)."
        required: false
        default: ''
      github_token:
        description: 'GitHub token for creating releases and pushing changes'
        required: true

jobs:
  release-packager:
    permissions:
      contents: write
      pull-requests: write
      id-token: write
    name: Release Packager
    runs-on: ubuntu-latest
    steps:
      # Install python 3
      - name: Tool Setup
        uses: actions/setup-python@v2
        with:
          architecture:   x64
        env:
          GITHUB_TOKEN: ${{ github.event.inputs.github_token }}

      - name: Install GitHub CLI
        run: |
          command -v gh >/dev/null 2>&1 || {
            curl -fsSL https://cli.github.com/packages/githubcli-archive-keyring.gpg | sudo dd of=/usr/share/keyrings/githubcli-archive-keyring.gpg
            sudo chmod go+r /usr/share/keyrings/githubcli-archive-keyring.gpg
            echo "deb [arch=$(dpkg --print-architecture) signed-by=/usr/share/keyrings/githubcli-archive-keyring.gpg] https://cli.github.com/packages stable main" | sudo tee /etc/apt/sources.list.d/github-cli.list > /dev/null
            sudo apt update
            sudo apt install gh
          }

      # Currently FreeRTOS/.github/scripts houses the release script. Download it for upcoming usage
      - name: Checkout FreeRTOS Release Tools
        uses: actions/checkout@v4.1.1
        with:
          repository: FreeRTOS/FreeRTOS
          path: tools

      # Simpler git auth if we use checkout action and forward the repo to release script
      - name: Checkout FreeRTOS Kernel
        uses: actions/checkout@v4.1.1
        with:
          path: local_kernel
          fetch-depth: 0

      - name: Configure git identity
        env:
          ACTOR: ${{ github.actor }}
        run: |
          git config --global user.name "$ACTOR"
          git config --global user.email "$ACTOR"@users.noreply.github.com

      - name: Create version branch
        env:
          VERSION_NUMBER: ${{ github.event.inputs.version_number }}
          COMMIT_ID: ${{ github.event.inputs.commit_id }}
        working-directory: ./local_kernel
        run: |
          git checkout -b "$VERSION_NUMBER" "$COMMIT_ID"
          git push -u origin "$VERSION_NUMBER"
          echo "COMMIT_SHA_1=$(git rev-parse HEAD)" >> $GITHUB_ENV

      - name: Create release preparation branch
        env:
          VERSION_NUMBER: ${{ github.event.inputs.version_number }}
        working-directory: ./local_kernel
        run: |
          git checkout -b "release-prep-$VERSION_NUMBER"

      - name: Update source files with version info
        env:
          VERSION_NUMBER: ${{ github.event.inputs.version_number }}
          MAIN_BR_VERSION_NUMBER: ${{ github.event.inputs.main_br_version }}
          COMMIT_SHA_1: ${{ env.COMMIT_SHA_1 }}
          GITHUB_TOKEN: ${{ github.event.inputs.github_token }}
        run: |
          # Install deps and run
          pip install -r ./tools/.github/scripts/release-requirements.txt
          ./tools/.github/scripts/update_src_version.py FreeRTOS --kernel-repo-path=local_kernel --kernel-commit="$COMMIT_SHA_1" --new-kernel-version="$VERSION_NUMBER" --new-kernel-main-br-version="$MAIN_BR_VERSION_NUMBER"
          exit $?

      - name: Update version number in manifest.yml
        env:
          VERSION_NUMBER: ${{ github.event.inputs.version_number }}
        working-directory: ./local_kernel
        run: |
          ./.github/scripts/manifest_updater.py -v "$VERSION_NUMBER"
          exit $?

      - name: Commit and push release preparation branch
        env:
          VERSION_NUMBER: ${{ github.event.inputs.version_number }}
        working-directory: ./local_kernel
        run: |
          # The update_src_version.py script detaches HEAD by checking out a SHA.
          # Re-attach HEAD to the release prep branch, keeping all commits.
          git branch -f "release-prep-$VERSION_NUMBER" HEAD
          git checkout "release-prep-$VERSION_NUMBER"

          git add .
          if git diff --cached --quiet; then
            echo "No new changes to commit — source files and manifest already up to date."
          else
            git commit -m '[AUTO][RELEASE]: Update version number in manifest.yml and source files'
          fi
          git push -u origin "release-prep-$VERSION_NUMBER"

      - name: Create pull request
        env:
          VERSION_NUMBER: ${{ github.event.inputs.version_number }}
          GH_TOKEN: ${{ github.event.inputs.github_token }}
          REPO_FULL_NAME: ${{ github.repository }}
        working-directory: ./local_kernel
        run: |
          PR_URL=$(gh pr create \
            --repo "$REPO_FULL_NAME" \
            --base "$VERSION_NUMBER" \
            --head "release-prep-$VERSION_NUMBER" \
            --title "[AUTO][RELEASE]: Release $VERSION_NUMBER" \
            --body "Automated release preparation for $VERSION_NUMBER. Updates version numbers in source files and manifest.yml.")
          echo "PR_URL=$PR_URL" >> $GITHUB_ENV

      - name: Wait for PR to be merged
        env:
          GH_TOKEN: ${{ github.event.inputs.github_token }}
          REPO_FULL_NAME: ${{ github.repository }}
        working-directory: ./local_kernel
        run: |
          PR_NUMBER=$(echo "$PR_URL" | grep -oE '[0-9]+$')
          while true; do
            STATE=$(gh pr view "$PR_NUMBER" --repo "$REPO_FULL_NAME" --json state --jq .state)
            if [ "$STATE" = "MERGED" ]; then
              echo "PR merged successfully"
              break
            elif [ "$STATE" = "CLOSED" ]; then
              echo "Error: PR was closed without merging"
              exit 1
            fi
            echo "Waiting for PR to be merged... (current state: $STATE)"
            sleep 30
          done

      - name: Re-checkout after merge
        uses: actions/checkout@v4.1.1
        with:
          path: local_kernel
          ref: ${{ github.event.inputs.version_number }}
          fetch-depth: 0

      - name: Generate SBOM
        uses: FreeRTOS/CI-CD-Github-Actions/sbom-generator@main
        with:
          directory: ./local_kernel
          distribution-type: repository
          creator: Amazon Web Services, Inc.
          download-location: git+https://github.com/${{ github.repository_owner }}/${{ github.event.repository.name }}.git@${{ github.event.inputs.version_number }}
          homepage: https://github.com/${{ github.repository_owner }}/${{ github.event.repository.name }}
          namespace-prefix: https://github.com/${{ github.repository_owner }}/${{ github.event.repository.name }}/releases/download/${{ github.event.inputs.version_number }}/
          include-file-hashes: true

      - name: Commit SBOM file
        env:
          VERSION_NUMBER: ${{ github.event.inputs.version_number }}
          GITHUB_TOKEN: ${{ github.event.inputs.github_token }}
        working-directory: ./local_kernel
        run: |
          git add .
          git commit -m '[AUTO][RELEASE]: Update SBOM'
          git push -u origin "$VERSION_NUMBER"
          echo "COMMIT_SHA_2=$(git rev-parse HEAD)" >> $GITHUB_ENV

      - name: Release
        env:
          VERSION_NUMBER: ${{ github.event.inputs.version_number }}
          MAIN_BR_VERSION_NUMBER: ${{ github.event.inputs.main_br_version }}
          COMMIT_SHA_2: ${{ env.COMMIT_SHA_2 }}
          REPO_OWNER: ${{ github.repository_owner }}
          GITHUB_TOKEN: ${{ github.event.inputs.github_token }}
        run: |
          # Install deps and run
          pip install -r ./tools/.github/scripts/release-requirements.txt
          ./tools/.github/scripts/release.py "$REPO_OWNER" --kernel-repo-path=local_kernel --kernel-commit="$COMMIT_SHA_2" --new-kernel-version="$VERSION_NUMBER" --new-kernel-main-br-version="$MAIN_BR_VERSION_NUMBER"
          exit $?

      - name: Backup Release Asset
        uses: FreeRTOS/CI-CD-Github-Actions/artifact-backup@main
        with:
          # This is dependent on the release script putting this zip file
          # in this exact location.
          artifact_path: ./FreeRTOS-KernelV${{ github.event.inputs.version_number }}.zip
          release_tag: ${{ github.event.inputs.version_number }}

      - name: Delete release preparation branch
        if: always()
        env:
          VERSION_NUMBER: ${{ github.event.inputs.version_number }}
          GH_TOKEN: ${{ github.event.inputs.github_token }}
        working-directory: ./local_kernel
        run: |
          # Only delete release-prep branch if the PR was already merged
          PR_STATE=$(gh pr list --repo "${{ github.repository }}" --head "release-prep-$VERSION_NUMBER" --json state --jq '.[0].state' 2>/dev/null || echo "")
          if [ "$PR_STATE" = "MERGED" ] || [ -z "$PR_STATE" ]; then
            git push origin --delete "release-prep-$VERSION_NUMBER" || true
          else
            echo "Skipping release-prep branch deletion — PR is still open (state: $PR_STATE)"
          fi