validate-version-bump.yaml

---
name: "Validate Version Bump"
on:
  pull_request:
    paths:
      - 'src/**/devcontainer-feature.json'

jobs:
  validate-version-bump:
    runs-on: ubuntu-latest
    permissions:
      contents: read
      pull-requests: write

    steps:
      - name: Checkout PR branch
        uses: actions/checkout@v4
        with:
          fetch-depth: 0

      - name: Validate version changes
        run: |
          set -e

          echo "Checking for version changes..."

          # Get changed files
          CHANGED_FILES=$(git diff --name-only \
            origin/${{ github.base_ref }}...HEAD | \
            grep 'devcontainer-feature.json$' || true)

          if [ -z "$CHANGED_FILES" ]; then
            echo "No devcontainer-feature.json files changed"
            exit 0
          fi

          HAS_ERROR=0

          for FILE in $CHANGED_FILES; do
            echo ""
            echo "Checking $FILE..."

            # Get old version
            OLD_VERSION=$(git show \
              origin/${{ github.base_ref }}:$FILE | \
              jq -r '.version' 2>/dev/null || echo "")
            NEW_VERSION=$(jq -r '.version' $FILE 2>/dev/null || echo "")
            FEATURE_ID=$(jq -r '.id' $FILE 2>/dev/null || echo "unknown")

            if [ -z "$OLD_VERSION" ]; then
              echo "  New feature: $FEATURE_ID (version: $NEW_VERSION)"
              continue
            fi

            if [ -z "$NEW_VERSION" ]; then
              echo "  Error: Could not read version from $FILE"
              HAS_ERROR=1
              continue
            fi

            # Validate semantic versioning format
            if ! echo "$NEW_VERSION" | \
                 grep -qE '^[0-9]+\.[0-9]+\.[0-9]+$'; then
              echo "  Error: Version does not follow semver"
              HAS_ERROR=1
              continue
            fi

            if [ "$OLD_VERSION" = "$NEW_VERSION" ]; then
              echo "  Warning: Version unchanged ($OLD_VERSION)"
            else
              echo "  Version bumped: $OLD_VERSION -> $NEW_VERSION"

              # Parse versions
              OLD_MAJOR=$(echo $OLD_VERSION | cut -d. -f1)
              OLD_MINOR=$(echo $OLD_VERSION | cut -d. -f2)
              OLD_PATCH=$(echo $OLD_VERSION | cut -d. -f3)

              NEW_MAJOR=$(echo $NEW_VERSION | cut -d. -f1)
              NEW_MINOR=$(echo $NEW_VERSION | cut -d. -f2)
              NEW_PATCH=$(echo $NEW_VERSION | cut -d. -f3)

              # Check if version increased
              if [ $NEW_MAJOR -lt $OLD_MAJOR ]; then
                echo "  Error: Major version decreased"
                HAS_ERROR=1
              elif [ $NEW_MAJOR -eq $OLD_MAJOR ]; then
                if [ $NEW_MINOR -lt $OLD_MINOR ]; then
                  echo "  Error: Minor version decreased"
                  HAS_ERROR=1
                elif [ $NEW_MINOR -eq $OLD_MINOR ]; then
                  if [ $NEW_PATCH -lt $OLD_PATCH ]; then
                    echo "  Error: Patch version decreased"
                    HAS_ERROR=1
                  fi
                fi
              fi
            fi
          done

          if [ $HAS_ERROR -eq 1 ]; then
            echo ""
            echo "Version validation failed"
            exit 1
          fi

          echo ""
          echo "All version changes are valid"