ci.yml

name: Build, Publish

on:
  pull_request:
    types: [opened, synchronize]

env:
  NODE_VERSION: 20.x

jobs:
  build:
    runs-on: ubuntu-latest
    steps:
      - name: Check out repository code ${{ github.repository }} on ${{ github.ref }}
        uses: actions/checkout@v4
        with:
          fetch-depth: 0

      - name: Configure Git user
        run: |
          git config --global user.email "pkgbot@form.io"
          git config --global user.name "pkgbot"

      - name: Merge target branch into current branch
        run: |
          git fetch origin ${{ github.event.pull_request.base.ref }}:${{ github.event.pull_request.base.ref }}
          git merge ${{ github.event.pull_request.base.ref }} --no-commit --no-ff

      - name: Check for merge conflicts
        run: |
          if ! git merge --no-commit --no-ff ${{ github.event.pull_request.base.ref }}; then
            echo "Merge conflicts detected."
            git merge --abort
            exit 1
          else
            echo "Merge successful."
          fi

      - name: Set up Node.js ${{ env.NODE_VERSION }}
        uses: actions/setup-node@v3
        with:
          node-version: ${{ env.NODE_VERSION }}
          cache: "npm"

      - name: Install dependencies
        run: yarn install --frozen-lockfile

      - name: Cache node modules
        uses: actions/cache@v3
        with:
          path: node_modules
          key: ${{ runner.os }}-node-${{ hashFiles('**/yarn.lock') }}
          restore-keys: |
            ${{ runner.os }}-node-

      - name: Build
        uses: borales/actions-yarn@v4
        with:
            cmd: build

      - name: Upload build artifact
        uses: actions/upload-artifact@v3
        with:
          name: build-artifact
          path: |
            dist/
            lib/
            LICENSE.txt
            README.md
            package.json

  publish:
    needs: build
    if: github.event.pull_request.base.ref == 'master'
    runs-on: ubuntu-latest
    steps:
      - name: Download build artifact
        uses: actions/download-artifact@v3
        with:
          name: build-artifact
          path: ./

      - name: View downloaded build output
        run: ls -a

      - name: Restore node modules from cache
        uses: actions/cache@v3
        with:
          path: node_modules
          key: ${{ runner.os }}-node-${{ hashFiles('**/yarn.lock') }}
          restore-keys: |
            ${{ runner.os }}-node-

      - name: Add npm token to .npmrc
        run: |
          echo "//registry.npmjs.org/:_authToken=${{ secrets.NPM_TOKEN }}" > .npmrc

      - name: Prepare version for publish
        id: prep
        run: |
          # Extract the pull request number and the short SHA of the commit
          PR_NUMBER=$(echo ${{ github.event.number }})
          COMMIT_SHORT_SHA=$(echo "${{ github.event.pull_request.head.sha }}" | cut -c1-7)

          # Extract the current version from package.json
          CURRENT_VERSION=$(node -p "require('./package.json').version")

          # If the current version includes '-rc.', remove it and everything after
          # This step ensures that we start with a base version like '3.0.0' even if it was a release candidate
          BASE_VERSION=$(echo "$CURRENT_VERSION" | cut -d'-' -f1)

          # Construct the new version string
          NEW_VERSION="${BASE_VERSION}-dev.${PR_NUMBER}.${COMMIT_SHORT_SHA}"
          
          # Output the new version for use in subsequent GitHub Actions steps
          echo "NEW_VERSION=$NEW_VERSION" >> $GITHUB_ENV

      - name: Echo version to publish
        run: |
          echo "Version to publish: $NEW_VERSION"

      - name: Publish to npm
        run: |
          npm version $NEW_VERSION
          yarn publish --tag dev