publish.yml

name: publish

on:
  push:
    tags:
      - 'v*'

jobs:
  publish:
    runs-on: ubuntu-latest
    permissions:
      contents: read
      id-token: write # required for npm provenance
    steps:
      - uses: actions/checkout@v4

      - uses: pnpm/action-setup@v4

      - uses: actions/setup-node@v4
        with:
          node-version: 20
          cache: pnpm
          registry-url: https://registry.npmjs.org

      - run: pnpm install --frozen-lockfile

      - name: Check version is unpublished
        id: check
        run: |
          NAME=$(node -p "require('./package.json').name")
          VERSION=$(node -p "require('./package.json').version")
          if npm view "$NAME@$VERSION" version >/dev/null 2>&1; then
            echo "$NAME@$VERSION already published — skipping"
            echo "skip=true" >> "$GITHUB_OUTPUT"
          else
            echo "skip=false" >> "$GITHUB_OUTPUT"
          fi

      - name: Publish
        if: steps.check.outputs.skip == 'false'
        run: npm publish --provenance --access public
        env:
          NPM_TOKEN: ${{ secrets.NPM_TOKEN }}
          NODE_AUTH_TOKEN: ${{ secrets.NPM_TOKEN }}