update-version.yml

name: Sync LTFS Version with Upstream

on:
  pull_request:
    types: [opened, synchronize, reopened]
  workflow_dispatch:

permissions:
  contents: write
  pull-requests: write

jobs:
  update-version:
    runs-on: ubuntu-latest
    
    steps:
      - name: Checkout repository
        uses: actions/checkout@v4
        with:
          ref: ${{ github.event.pull_request.head.ref }}
          repository: ${{ github.event.pull_request.head.repo.full_name }}
          fetch-depth: 0
          token: ${{ secrets.GITHUB_TOKEN }}
      
      - name: Fetch latest tag from upstream
        id: get_tag
        run: |
          # Fetch the latest tag from the upstream repository
          LATEST_TAG=$(curl -s https://api.github.com/repos/LinearTapeFileSystem/ltfs/tags | jq -r '.[0].name')
          echo "Latest tag from upstream: $LATEST_TAG"
          
          # Extract version numbers and build number (e.g., v.2.4.8.2-10520 -> 2.4.8.2 (10520))
          VERSION_NUM=$(echo "$LATEST_TAG" | sed -E 's/^v\.?([0-9]+\.[0-9]+\.[0-9]+\.[0-9]+).*/\1/')
          BUILD_NUM=$(echo "$LATEST_TAG" | sed -E 's/^v\.?[0-9]+\.[0-9]+\.[0-9]+\.[0-9]+-([0-9]+).*/\1/')
          
          # Combine version with build number
          if [ -n "$BUILD_NUM" ] && [ "$BUILD_NUM" != "$LATEST_TAG" ]; then
            VERSION="$VERSION_NUM ($BUILD_NUM)"
          else
            VERSION="$VERSION_NUM"
          fi
          
          echo "Extracted version: $VERSION"
          
          # Store in output
          echo "tag=$LATEST_TAG" >> $GITHUB_OUTPUT
          echo "version=$VERSION" >> $GITHUB_OUTPUT
      
      - name: Check current version in configure.ac
        id: check_version
        run: |
          # Extract current version from line 39
          CURRENT_VERSION=$(sed -n '39p' configure.ac | sed -E 's/.*\[LTFS\], \[([^]]+)\].*/\1/')
          echo "Current version in configure.ac: $CURRENT_VERSION"
          echo "current_version=$CURRENT_VERSION" >> $GITHUB_OUTPUT
          
          # Check if commit message contains "release-tag"
          COMMIT_MSG=$(git log -1 --pretty=%B)
          echo "Latest commit message: $COMMIT_MSG"
          
          if echo "$COMMIT_MSG" | grep -q "release-tag"; then
            echo "Commit contains 'release-tag' keyword - skipping update"
            echo "needs_update=false" >> $GITHUB_OUTPUT
            exit 0
          fi
          
          # Extract the value inside parentheses from current version
          PAREN_VALUE=$(echo "$CURRENT_VERSION" | sed -E 's/.*\(([^)]+)\).*/\1/')
          echo "Value in parentheses: $PAREN_VALUE"
          
          # Check if the value in parentheses is a number
          if ! echo "$PAREN_VALUE" | grep -qE '^[0-9]+$'; then
            echo "Value in parentheses is not a number (likely 'Prelim') - no update needed"
            echo "needs_update=false" >> $GITHUB_OUTPUT
            exit 0
          fi
          
          echo "Value in parentheses is a number - proceeding with update"
          
          # Extract version number without parentheses (e.g., "2.4.8.2" from "2.4.8.2 (10520)")
          VERSION_BASE=$(echo "$CURRENT_VERSION" | sed -E 's/^([0-9]+\.[0-9]+\.[0-9]+\.[0-9]+).*/\1/')
          echo "Base version: $VERSION_BASE"
          
          # Increment the last number in the version
          LAST_NUM=$(echo "$VERSION_BASE" | awk -F. '{print $NF}')
          NEW_LAST_NUM=$((LAST_NUM + 1))
          NEW_VERSION=$(echo "$VERSION_BASE" | sed -E "s/\.[0-9]+$/.$NEW_LAST_NUM/")
          NEW_VERSION_WITH_PRELIM="$NEW_VERSION (Prelim)"
          
          echo "New version: $NEW_VERSION_WITH_PRELIM"
          echo "new_version=$NEW_VERSION_WITH_PRELIM" >> $GITHUB_OUTPUT
          echo "needs_update=true" >> $GITHUB_OUTPUT
      
      - name: Update configure.ac
        if: steps.check_version.outputs.needs_update == 'true'
        id: update_file
        run: |
          VERSION="${{ steps.check_version.outputs.new_version }}"
          
          # Update line 39 with the new version
          sed -i "39s/\[LTFS\], \[[^]]*\]/[LTFS], [$VERSION]/" configure.ac
          
          echo "File updated successfully"
          echo "Updated line 39:"
          sed -n '39p' configure.ac
      
      - name: Commit and push changes
        if: steps.check_version.outputs.needs_update == 'true'
        run: |
          git config --local user.email "github-actions[bot]@users.noreply.github.com"
          git config --local user.name "github-actions[bot]"
          
          git add configure.ac
          git commit -m "chore: update version to ${{ steps.check_version.outputs.new_version }}"
          git push origin HEAD:${{ github.event.pull_request.head.ref }}
      
      - name: Summary
        run: |
          echo "## Version Check Summary" >> $GITHUB_STEP_SUMMARY
          echo "" >> $GITHUB_STEP_SUMMARY
          echo "- **Upstream Tag**: ${{ steps.get_tag.outputs.tag }}" >> $GITHUB_STEP_SUMMARY
          echo "- **Upstream Version**: ${{ steps.get_tag.outputs.version }}" >> $GITHUB_STEP_SUMMARY
          echo "- **Current Version**: ${{ steps.check_version.outputs.current_version }}" >> $GITHUB_STEP_SUMMARY
          echo "- **Update Needed**: ${{ steps.check_version.outputs.needs_update }}" >> $GITHUB_STEP_SUMMARY
          
          if [ "${{ steps.check_version.outputs.needs_update }}" == "true" ]; then
            echo "" >> $GITHUB_STEP_SUMMARY
            echo "**configure.ac updated** - Version changed from ${{ steps.check_version.outputs.current_version }} to ${{ steps.check_version.outputs.new_version }}" >> $GITHUB_STEP_SUMMARY
          else
            echo "" >> $GITHUB_STEP_SUMMARY
            echo "**No update needed** - Version already has 'Prelim' or commit contains 'release-tag'" >> $GITHUB_STEP_SUMMARY
          fi