snapit.yml

name: Snapshot

on:
  issue_comment:
    types:
      - created

concurrency: ${{ github.workflow }}-${{ github.ref }}

jobs:
  snapshot:
    name: Snapshot Release
    if: |
      github.event.issue.pull_request &&
      (startsWith(github.event.comment.body, '/snapit') || startsWith(github.event.comment.body, '/snapshot-release'))
    runs-on: ubuntu-latest
    steps:
      - name: Enforce permission requirement
        uses: prince-chrismc/check-actor-permissions-action@v1
        with:
          permission: write

      - name: Add initial reaction
        uses: peter-evans/create-or-update-comment@v2
        with:
          comment-id: ${{ github.event.comment.id }}
          reactions: eyes

      - name: Validate pull request
        uses: actions/github-script@v6
        id: pr_data
        env:
          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
        with:
          script: |
            try {
              const pullRequest = await github.rest.pulls.get({
                owner: context.repo.owner,
                repo: context.repo.repo,
                pull_number: context.issue.number,
              })

              // Pull request from fork
              if (context.payload.repository.full_name !== pullRequest.data.head.repo.full_name) {
                const errorMessage = '`/snapit` is not supported on pull requests from forked repositories.'

                await github.rest.issues.createComment({
                  issue_number: context.issue.number,
                  owner: context.repo.owner,
                  repo: context.repo.repo,
                  body: errorMessage,
                })

                core.setFailed(errorMessage)
              }
            } catch (err) {
              core.setFailed(`Request failed with error ${err}`)
            }

      - name: Checkout default branch
        uses: actions/checkout@v3

      # issue_comment requires us to checkout the branch
      # https://github.com/actions/checkout/issues/331#issuecomment-1120113003
      - name: Checkout pull request branch
        run: gh pr checkout ${{ github.event.issue.number }}
        env:
          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}

      # Because changeset entries are consumed and removed on the
      # 'changeset-release/main' branch, we need to reset the files
      # so the following 'changeset version --snapshot' command will
      # regenerate the package version bumps with the snapshot releases
      - name: Reset changeset entries on changeset-release/main branch
        run: |
          if [[ $(git branch --show-current) == 'changeset-release/main' ]]; then
            git checkout origin/main -- .changeset
          fi

      - name: Free up space on GitHub image
        run: |
          # Based on the official advice:
          # https://github.com/actions/virtual-environments/issues/2840#issuecomment-790492173
          sudo rm -rf /usr/share/dotnet
          sudo rm -rf /opt/ghc
          sudo rm -rf "/usr/local/share/boost"
          sudo rm -rf "$AGENT_TOOLSDIRECTORY"

      - name: Setup Node.js
        uses: actions/setup-node@v3
        with:
          node-version: 16.x

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

      - name: Create an .npmrc
        env:
          NPM_TOKEN: ${{ secrets.NPM_TOKEN }}
        run: |
          cat << EOF > "$HOME/.npmrc"
            //registry.npmjs.org/:_authToken=$NPM_TOKEN
          EOF

      - name: Create and publish snapshot release
        uses: actions/github-script@v6
        env:
          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
        with:
          script: |
            const execa = require('execa')

            await execa.command('yarn version-packages -- --snapshot snapshot-release', { stdio: 'inherit' })

            const releaseProcess = execa.command('yarn release -- --no-git-tags --snapshot --tag snapshot-release')
            releaseProcess.stdout.pipe(process.stdout)

            const {stdout} = await releaseProcess

            const newTags = Array
              .from(stdout.matchAll(/New tag:\s+([^\s\n]+)/g))
              .map(([_, tag]) => tag)

            if (newTags.length) {
              const multiple = newTags.length > 1

              const body = (
                `🫰✨ **Thanks @${context.actor}! ` +
                `Your snapshot${multiple ? 's have' : ' has'} been published to npm.**\n\n` +
                `Test the snapshot${multiple ? 's' : ''} by updating your \`package.json\` ` +
                `with the newly published version${multiple ? 's' : ''}:\n` +
                newTags.map(tag => (
                  '```sh\n' +
                  `yarn add ${tag}\n` +
                  '```'
                )).join('\n')
              )
              await github.rest.issues.createComment({
                issue_number: context.issue.number,
                owner: context.repo.owner,
                repo: context.repo.repo,
                body,
              })
            }

      - name: Add final reaction
        uses: peter-evans/create-or-update-comment@v2
        with:
          comment-id: ${{ github.event.comment.id }}
          reactions: rocket