snapshot-release.yml

name: Create a Snapshot Release

on:
  workflow_dispatch:
  issue_comment:
    types: [created]

defaults:
  run:
    shell: bash

env:
  TURBO_TOKEN: ${{ secrets.TURBO_TOKEN }}
  TURBO_TEAM: ${{ secrets.TURBO_TEAM }}
  FORCE_COLOR: 1

jobs:
  snapshot-release:
    name: Create a snapshot release of a pull request
    if: ${{ github.repository_owner == 'withastro' && github.event.issue.pull_request && (contains(github.event.comment.body, '!preview') || contains(github.event.comment.body, '/preview') || contains(github.event.comment.body, '!snapshot') || contains(github.event.comment.body, '/snapshot')) }}
    runs-on: ubuntu-latest
    permissions:
      contents: read
      id-token: write
      issues: write
      pull-requests: write
    steps:
      - name: Check if user has write access
        uses: lannonbr/repo-permission-check-action@2.0.2
        with:
          permission: write
        env:
          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}

      - name: Extract the snapshot name from comment body
        id: getSnapshotName
        uses: actions/github-script@v7
        with:
          script: |
            const { body } = context.payload.comment;
            const PREVIEW_RE = /^[!\/](?:preview|snapshot)\s+(\S*)\s*$/gim;
            const [_, name] = PREVIEW_RE.exec(body) ?? [];
            if (name) return name;

            const error = 'Invalid command. Expected: "/preview <snapshot-name>"'
            github.rest.issues.createComment({
              issue_number: context.issue.number,
              owner: context.repo.owner,
              repo: context.repo.repo,
              body: error,
            })
            core.setFailed(error)
          result-encoding: string

      - name: resolve pr refs
        id: refs
        uses: eficode/resolve-pr-refs@main
        with:
          token: ${{ secrets.GITHUB_TOKEN }}

      - uses: actions/checkout@v4
        with:
          ref: ${{ steps.refs.outputs.head_ref }}
          fetch-depth: 0

      - name: Extract base branch from .changeset/config.json
        id: getBaseBranch
        run: |
          baseBranch=$(jq -r '.baseBranch' .changeset/config.json)
          echo "baseBranch=${baseBranch}" >> $GITHUB_OUTPUT

      - run: git fetch origin ${{ steps.getBaseBranch.outputs.baseBranch }}:${{ steps.getBaseBranch.outputs.baseBranch }}

      - name: Setup PNPM
        uses: pnpm/action-setup@v3

      - name: Setup Node
        uses: actions/setup-node@v4
        with:
          node-version: 22
          registry-url: "https://registry.npmjs.org"
          cache: "pnpm"

      - name: Install dependencies
        run: pnpm install

      - name: Build Packages
        run: pnpm run build

      - name: Bump Package Versions
        id: changesets
        run: |
          pnpm exec changeset status --output status.output.json 2>&1
          # Snapshots don't work in pre mode. See https://github.com/changesets/changesets/issues/1195
          pnpm exec changeset pre exit || true
          pnpm exec changeset version --snapshot ${{ steps.getSnapshotName.outputs.result }}

          EOF=$(dd if=/dev/urandom bs=15 count=1 status=none | base64)
          echo "status<<$EOF" >> $GITHUB_OUTPUT
          echo "$(cat status.output.json)" >> $GITHUB_OUTPUT
          echo "$EOF" >> $GITHUB_OUTPUT
        env:
          # Needs access to run the script
          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
          # Disable color
          FORCE_COLOR: 0
          NO_COLOR: 1

      - name: Publish Release
        id: publish
        run: |
          set -o pipefail
          GITHUB_ACTIONS=0 pnpm run build 2>&1 | tee build.output.txt
          BUILD_EXIT_CODE=$?
          
          if [ $BUILD_EXIT_CODE -ne 0 ]; then
            echo "::error::Build failed. See output above."
            # Store the build output for the notification step before exiting
            EOF=$(dd if=/dev/urandom bs=15 count=1 status=none | base64)
            echo "build<<$EOF" >> $GITHUB_OUTPUT
            echo "$(cat build.output.txt)" >> $GITHUB_OUTPUT
            echo "$EOF" >> $GITHUB_OUTPUT
            exit 1
          fi
          
          pnpm exec changeset publish --tag experimental--${{ steps.getSnapshotName.outputs.result }} 2>&1 | tee publish.output.txt
          PUBLISH_EXIT_CODE=$?
          
          if [ $PUBLISH_EXIT_CODE -ne 0 ]; then
            echo "::error::Publish failed. See output above."
          fi

          EOF=$(dd if=/dev/urandom bs=15 count=1 status=none | base64)

          echo "build<<$EOF" >> $GITHUB_OUTPUT
          echo "$(cat build.output.txt)" >> $GITHUB_OUTPUT
          echo "$EOF" >> $GITHUB_OUTPUT

          echo "publish<<$EOF" >> $GITHUB_OUTPUT
          echo "$(cat publish.output.txt)" >> $GITHUB_OUTPUT
          echo "$EOF" >> $GITHUB_OUTPUT

          # Exit with error if publish failed
          exit $PUBLISH_EXIT_CODE
        env:
          # Needs access to publish to npm
          NPM_TOKEN: ${{ secrets.NPM_TOKEN }}
          NODE_AUTH_TOKEN: ${{ secrets.NPM_TOKEN }}
          # Disable color
          FORCE_COLOR: 0
          NO_COLOR: 1

      - name: Pull Request Notification
        uses: actions/github-script@v7
        if: always()
        env:
          TAG: ${{ steps.getSnapshotName.outputs.result }}
          STATUS_DATA: ${{ steps.changesets.outputs.status }}
          BUILD_LOG: ${{ steps.publish.outputs.build }}
          PUBLISH_LOG: ${{ steps.publish.outputs.publish }}
          JOB_STATUS: ${{ job.status }}
        with:
          script: |
            let changeset = { releases: [] };
            try {
              changeset = JSON.parse(process.env.STATUS_DATA);
            } catch (e) {}

            let message = '';
            
            if (process.env.JOB_STATUS === 'success') {
              message = 'Snapshots have been released for the following packages:';
              for (const release of changeset.releases) {
                if (release.type === 'none') continue;
                message += `\n- \`${release.name}@experimental--${process.env.TAG}\``;
              }
            } else {
              message = '❌ Snapshot release failed.';
            }

            function details(title, body, failed = false) {
              if (!body) return;
              message += '\n';
              const icon = failed ? '❌ ' : '';
              message += `<details><summary><strong>${icon}${title}</strong></summary>`;
              message += '\n\n```\n';
              message += body;
              message += '\n```\n\n</details>';
            }

            // Show build log first if it exists
            if (process.env.BUILD_LOG) {
              details('Build Log', process.env.BUILD_LOG, process.env.JOB_STATUS !== 'success');
            }
            
            // Only show publish log if it exists (might not if build failed)
            if (process.env.PUBLISH_LOG) {
              details('Publish Log', process.env.PUBLISH_LOG, process.env.JOB_STATUS !== 'success');
            }

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