name: Code changes comment

# **What it does**: When a PR is opened in docs-internal or docs containing code, it comments with instructions on how to deploy and review the changes.
# **Why we have it**: To help Docs contributors understand how to review their changes.
# **Who does it impact**: docs-internal and docs maintainers and contributors

on:
  # Required in lieu of `pull_request` so that the comment can be posted to PRs opened from a fork.
  pull_request_target:
    types:
      - opened
      - synchronize
    # this applies to any non-content files, this workflow will run for all changed files unless it's ONLY these content-related changes
    paths-ignore:
      - 'content/**'
      - 'data/**'
      - 'assets/images/**'

permissions:
  contents: read
  pull-requests: write

# This allows a subsequently queued workflow run to interrupt previous runs
concurrency:
  group: '${{ github.workflow }} @ ${{ github.event.pull_request.head.label || github.head_ref || github.ref }}'
  cancel-in-progress: true

jobs:
  postOnCodeChanges:
    if: ${{ github.event.pull_request.user.login != 'docs-bot' && (github.repository == 'github/docs-internal' || github.repository == 'github/docs') }}
    runs-on: ubuntu-latest
    env:
      GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
    steps:
      - name: check out repo content
        uses: actions/checkout@b4ffde65f46336ab88eb53be808477a3936bae11 # v4.1.1

      - name: Find code changes comment
        uses: peter-evans/find-comment@3eae4d37986fb5a8592848f6a574fdf654e61f9e
        id: findComment
        with:
          issue-number: ${{ github.event.pull_request.number }}
          comment-author: 'github-actions[bot]'
          body-includes: '<!-- CODE_CHANGES_COMMENT -->'

      # TODO: We'll update this comment at a later time with permament-ish links to deployment instructions.
      - name: Comment on code changes
        if: ${{ !steps.findComment.outputs.comment-id }}
        run: |
          if [[ "${{ github.repository }}" == "github/docs" ]]; then
            COMMENT_BODY="<!-- CODE_CHANGES_COMMENT -->
            ### 👓 How to review these changes

            Thank you for your contribution. To review these changes, you can:

            1. [Spin up a codespace](https://docs.github.com/en/contributing/setting-up-your-environment-to-work-on-github-docs/working-on-github-docs-in-a-codespace)
            1. [Set up a local development environment](https://docs.github.com/en/contributing/setting-up-your-environment-to-work-on-github-docs/creating-a-local-environment#setting-up-your-local-environment)

            This pull request contains code changes, so we will not generate a table of review links. A Hubber will need to deploy your changes internally to review.

            🤖 This comment is automatically generated."
          else
            COMMENT_BODY="<!-- CODE_CHANGES_COMMENT -->
            ### 👓 How to review these changes

            Thank you for your contribution. To review these changes, you can:

            1. [Spin up a codespace](https://github.com/github/docs-team/blob/main/contributing-to-docs/use-a-codespace-to-review.md).
            1. [Set up a local development environment](https://docs.github.com/en/contributing/setting-up-your-environment-to-work-on-github-docs/creating-a-local-environment#setting-up-your-local-environment).
            1. Message \`#docs-engineering\` on Slack for a staging server.

            This pull request contains code changes, so we will not generate a table of review links.

            🤖 This comment is automatically generated."
          fi

          gh pr comment ${{ github.event.pull_request.number }} --body "$COMMENT_BODY"