release-pr.yml

name: release-pr

on:
  push:
    branches:
      - main

permissions:
  contents: read
  pull-requests: write

jobs:
  release-pr:
    name: 🚀 Create or update release PR
    runs-on: ubuntu-slim
    if: github.repository == 'npmx-dev/npmx.dev'

    steps:
      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
        with:
          fetch-depth: 0

      - name: 🔍 Check for unreleased commits
        id: check
        run: |
          git fetch origin release
          COMMITS=$(git log origin/release..origin/main --oneline)
          if [ -z "$COMMITS" ]; then
            echo "skip=true" >> "$GITHUB_OUTPUT"
            echo "No new commits to release"
          else
            echo "skip=false" >> "$GITHUB_OUTPUT"
            echo "Found unreleased commits:"
            echo "$COMMITS"
          fi

      - name: 📝 Generate changelog body
        if: steps.check.outputs.skip == 'false'
        id: changelog
        run: |
          # Get the latest tag, or use initial commit if no tags exist
          LATEST_TAG=$(git describe --tags --abbrev=0 origin/release 2>/dev/null || echo "")

          if [ -z "$LATEST_TAG" ]; then
            FROM_REF=$(git rev-list --max-parents=0 HEAD)
            CURRENT_VERSION="0.0.0"
          else
            FROM_REF="$LATEST_TAG"
            CURRENT_VERSION="${LATEST_TAG#v}"
          fi

          # Categorize commits
          FEATURES=""
          FIXES=""
          CHORES=""
          OTHER=""

          while IFS= read -r line; do
            [ -z "$line" ] && continue
            SHA=$(echo "$line" | cut -d' ' -f1)
            MSG=$(echo "$line" | cut -d' ' -f2-)
            ENTRY="- $MSG (\`$SHA\`)"

            if echo "$MSG" | grep -qE '^feat(\(|:)'; then
              FEATURES="${FEATURES}${ENTRY}\n"
            elif echo "$MSG" | grep -qE '^fix(\(|:)'; then
              FIXES="${FIXES}${ENTRY}\n"
            elif echo "$MSG" | grep -qE '^(chore|ci|build|perf|refactor|style|test|docs)(\(|:)'; then
              CHORES="${CHORES}${ENTRY}\n"
            else
              OTHER="${OTHER}${ENTRY}\n"
            fi
          done <<< "$(git log "$FROM_REF"..origin/main --oneline --no-merges)"

          # Determine next version
          HAS_BREAKING=$(git log "$FROM_REF"..origin/main --format='%B' | grep -c 'BREAKING CHANGE\|!:' || true)
          HAS_FEAT=$(git log "$FROM_REF"..origin/main --oneline --no-merges | grep -cE '^[a-f0-9]+ feat(\(|:)' || true)

          IFS='.' read -r MAJOR MINOR PATCH <<< "$CURRENT_VERSION"

          if [ "$HAS_BREAKING" -gt 0 ] && [ "$MAJOR" -gt 0 ]; then
            NEXT_VERSION="$((MAJOR + 1)).0.0"
          elif [ "$HAS_FEAT" -gt 0 ]; then
            NEXT_VERSION="${MAJOR}.$((MINOR + 1)).0"
          else
            NEXT_VERSION="${MAJOR}.${MINOR}.$((PATCH + 1))"
          fi

          echo "next_version=v${NEXT_VERSION}" >> "$GITHUB_OUTPUT"

          # Build the PR body
          BODY="This PR will deploy the following changes to production (\`npmx.dev\`).\n\n"
          BODY="${BODY}**Next version: \`v${NEXT_VERSION}\`** (current: \`v${CURRENT_VERSION}\`)\n\n"

          if [ -n "$FEATURES" ]; then
            BODY="${BODY}### Features\n\n${FEATURES}\n"
          fi
          if [ -n "$FIXES" ]; then
            BODY="${BODY}### Fixes\n\n${FIXES}\n"
          fi
          if [ -n "$CHORES" ]; then
            BODY="${BODY}### Other Changes\n\n${CHORES}\n"
          fi
          if [ -n "$OTHER" ]; then
            BODY="${BODY}### Uncategorized\n\n${OTHER}\n"
          fi

          BODY="${BODY}---\n\n"
          BODY="${BODY}> Merging this PR will:\n"
          BODY="${BODY}> - Deploy to \`npmx.dev\` via Vercel\n"
          BODY="${BODY}> - Create a \`v${NEXT_VERSION}\` tag and GitHub Release\n"
          BODY="${BODY}> - Publish \`npmx-connector@${NEXT_VERSION}\` to npm"

          # Write body to file, truncating if needed (GitHub limits PR body to 65536 chars)
          echo -e "$BODY" > /tmp/pr-body.md
          if [ "$(wc -c < /tmp/pr-body.md)" -gt 60000 ]; then
            COMMIT_COUNT=$(git log "$FROM_REF"..origin/main --oneline --no-merges | wc -l)
            COMPARE_URL="https://github.com/npmx-dev/npmx.dev/compare/${FROM_REF}...main"
            TRUNCATED="This PR will deploy the following changes to production (\`npmx.dev\`).\n\n"
            TRUNCATED="${TRUNCATED}**Next version: \`v${NEXT_VERSION}\`** (current: \`v${CURRENT_VERSION}\`)\n\n"
            TRUNCATED="${TRUNCATED}> **${COMMIT_COUNT} commits** are included in this release. The full changelog is too large to display here.\n>\n"
            TRUNCATED="${TRUNCATED}> [View full diff on GitHub](${COMPARE_URL})\n\n"
            TRUNCATED="${TRUNCATED}---\n\n"
            TRUNCATED="${TRUNCATED}> Merging this PR will:\n"
            TRUNCATED="${TRUNCATED}> - Deploy to \`npmx.dev\` via Vercel\n"
            TRUNCATED="${TRUNCATED}> - Create a \`v${NEXT_VERSION}\` tag and GitHub Release\n"
            TRUNCATED="${TRUNCATED}> - Publish \`npmx-connector@${NEXT_VERSION}\` to npm"
            echo -e "$TRUNCATED" > /tmp/pr-body.md
          fi

      - name: 🚀 Create or update release PR
        if: steps.check.outputs.skip == 'false'
        env:
          GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
          NEXT_VERSION: ${{ steps.changelog.outputs.next_version }}
        run: |
          EXISTING_PR=$(gh pr list --base release --head main --state open --json number --jq '.[0].number')

          if [ -n "$EXISTING_PR" ]; then
            gh pr edit "$EXISTING_PR" \
              --title "chore: release ${NEXT_VERSION}" \
              --body-file /tmp/pr-body.md
            echo "Updated existing PR #${EXISTING_PR}"
          else
            gh pr create \
              --base release \
              --head main \
              --title "chore: release ${NEXT_VERSION}" \
              --body-file /tmp/pr-body.md \
              --label "release"
            echo "Created new release PR"
          fi