version.yml

name: Version Bump

on:
  push:
    branches:
      - main
    paths:
      - ".changeset/**"
      - '!.changeset/README.md'

jobs:
  bump-version:
    runs-on: ubuntu-latest

    permissions:
      contents: write        # needed to commit the version bump and push the branch
      pull-requests: write   # needed to open the release PR

    steps:
      - name: Checkout repository
        uses: actions/checkout@v7

      - name: Set up Java
        uses: actions/setup-java@v5
        with:
          distribution: temurin
          java-version: 17

      - name: Detect change types and build PR body
        id: detect
        run: |
          FILES=$(find .changeset -maxdepth 1 -type f ! -name README.md)

          if [ -z "$FILES" ]; then
            echo "No changeset files found"
            echo "found=false" >> "$GITHUB_OUTPUT"
            exit 0
          fi
          echo "found=true" >> "$GITHUB_OUTPUT"

          # Initialize variables
          TYPE_PRIORITY=0
          BODY=""

          for FILE in $FILES; do
            echo "Processing $FILE"

            FILE_TYPE=$(grep '^type:' "$FILE" | awk '{print $2}')
            case "$FILE_TYPE" in
              patch) PRIORITY=1 ;;
              minor) PRIORITY=2 ;;
              major) PRIORITY=3 ;;
              *) echo "Unknown type: $FILE_TYPE"; exit 1 ;;
            esac

            if [ $PRIORITY -gt $TYPE_PRIORITY ]; then
              TYPE_PRIORITY=$PRIORITY
              TYPE=$FILE_TYPE
            fi

            CONTENT=$(sed '/^type:/d' "$FILE" | sed '/^---$/d')
            BODY="$BODY\n\n$CONTENT"
          done

          echo "TYPE=$TYPE" >> $GITHUB_ENV
          echo "BODY<<EOF" >> $GITHUB_ENV
          echo -e "$BODY" >> $GITHUB_ENV
          echo "EOF" >> $GITHUB_ENV

          echo "Final detected type: $TYPE"
          echo "PR body:"
          echo -e "$BODY"

          VERSION=$(mvn help:evaluate -Dexpression=project.version -q -DforceStdout)
          # Split the version by dots
          IFS='.' read -r major minor patch <<< "$VERSION"

          case "$TYPE" in
            patch)
              new_version="$major.$minor.$((patch+1))"
              mvn versions:set -DnewVersion="$new_version" -DgenerateBackupPoms=false
              ;;
            minor)
              new_version="$major.$((minor+1)).0"
              mvn versions:set -DnewVersion="$new_version" -DgenerateBackupPoms=false
              ;;
            major)
              new_version="$((major+1)).0.0"
              mvn versions:set -DnewVersion="$new_version" -DgenerateBackupPoms=false
              ;;
            *)
              echo "Unknown type: $TYPE"; exit 1
              ;;
          esac
          mvn versions:commit

      - name: Get new project version
        id: get-version
        if: steps.detect.outputs.found == 'true'
        run: |
          VERSION=$(mvn help:evaluate -Dexpression=project.version -q -DforceStdout)
          echo "VERSION=$VERSION" >> $GITHUB_ENV
          echo "New version: $VERSION"

      - name: Update CHANGELOG.md
        if: steps.detect.outputs.found == 'true'
        run: |
          ENTRY_FILE=$(mktemp)
          printf "## %s\n%s\n\n" "$VERSION" "$BODY" > "$ENTRY_FILE"

          awk -v newfile="$ENTRY_FILE" '
            BEGIN { fm=0; done=0 }
            {
              print
              if ($0 == "---") {
                fm++
                if (fm == 2 && !done) {
                  print ""
                  while ((getline line < newfile) > 0) print line
                  done=1
                }
              }
            }
          ' CHANGELOG.md > /tmp/CHANGELOG.new

          mv /tmp/CHANGELOG.new CHANGELOG.md

          # bump the index in the frontmatter to match the new entry count
          sed -i "0,/^index: [0-9]*/s//index: $(( $(grep -c '^## ' CHANGELOG.md) ))/" CHANGELOG.md

      - name: Delete changeset files
        if: steps.detect.outputs.found == 'true'
        run: |
          find .changeset -type f ! -name 'README.md' -delete
          echo "Removed processed changeset files."

      - name: Create Pull Request
        if: steps.detect.outputs.found == 'true'
        uses: peter-evans/create-pull-request@v8
        with:
          base: main
          commit-message: "chore: release v${{ env.VERSION }}"
          branch: changeset
          title: "Release v${{ env.VERSION }}"
          body: ${{ env.BODY }}
          labels: version