automerge-for-humans-add-ready-to-merge-or-do-not-merge-label.yml

# This workflow is centrally managed in https://github.com/asyncapi/.github/
# Don't make changes to this file in this repo as they will be overwritten with changes made to the same file in above mentioned repo

# Purpose of this workflow is to enable anyone to label PR with the following labels:
# `ready-to-merge` and `do-not-merge` labels to get stuff merged or blocked from merging
# `autoupdate` to keep a branch up-to-date with the target branch

name: Label PRs # if proper comment added

on: 
    issue_comment:
        types: 
            - created

jobs:
  add-ready-to-merge-label:
    if: > 
      github.event.issue.pull_request && 
      github.event.issue.state != 'closed' && 
      github.actor != 'asyncapi-bot' && 
      (
        contains(github.event.comment.body, '/ready-to-merge') || 
        contains(github.event.comment.body, '/rtm' )
      )

    runs-on: ubuntu-latest
    steps:

      - name: Check if PR is draft or is up-to-date # such info is not available in the context of issue_comment event
        uses: actions/github-script@v5
        id: checkPR
        with:
          result-encoding: string
          script: |
            let isDraft = false;
            let isUpToDate = true;
            const prDetailsUrl = context.payload.issue.pull_request.url;
            const { data: pull } = await github.request(prDetailsUrl);
            isDraft = pull.draft;

            const { data: comparison } =
            await github.rest.repos.compareCommitsWithBasehead({
              owner: pull.head.repo.owner.login,
              repo: pull.head.repo.name,
              basehead: `${pull.head.label}...${pull.base.label}`,
            });
            if (comparison.behind_by !== 0) isUpToDate = false;
            return { isDraft, isUpToDate };
            
      - uses: actions-ecosystem/action-create-comment@v1
        if: ${{ !steps.checkPR.outputs.result.isUpToDate }}
        with:
          github_token: ${{ secrets.GH_TOKEN }}
          body: |
            Hello, @${{ github.actor }}! 👋🏼
            This PR is not up to date with the base branch and can't be merged.
            You can add comment to this PR with text: `/autoupdate` or `/au`. This way you ask our bot to perform regular updates for you. The only requirement for this to work is to enable [Allow edits from maintainers](https://docs.github.com/en/pull-requests/collaborating-with-pull-requests/working-with-forks/allowing-changes-to-a-pull-request-branch-created-from-a-fork) option in your PR. Otherwise the only option that you have is to manually update your branch with latest version of the base branch.
            Thanks 😄 

      - name: Add ready-to-merge label
        if: ${{ !steps.checkPR.outputs.result.isDraft }}
        uses: actions/github-script@v5
        with:
          github-token: ${{ secrets.GH_TOKEN }}
          script: |
            github.rest.issues.addLabels({
              issue_number: context.issue.number,
              owner: context.repo.owner,
              repo: context.repo.repo,
              labels: ['ready-to-merge']
            }) 

  add-do-not-merge-label:
    if: >
      github.event.issue.pull_request &&
      github.event.issue.state != 'closed' &&
      github.actor != 'asyncapi-bot' &&
      (
        contains(github.event.comment.body, '/do-not-merge') ||
        contains(github.event.comment.body, '/dnm' )
      )
    runs-on: ubuntu-latest
    steps:
      - name: Add do-not-merge label
        uses: actions/github-script@v5
        with:
          github-token: ${{ secrets.GH_TOKEN }}
          script: |
            github.rest.issues.addLabels({
              issue_number: context.issue.number,
              owner: context.repo.owner,
              repo: context.repo.repo,
              labels: ['do-not-merge']
            }) 
  add-autoupdate-label:
    if: >
      github.event.issue.pull_request && 
      github.event.issue.state != 'closed' && 
      github.actor != 'asyncapi-bot' &&
      (
        contains(github.event.comment.body, '/autoupdate') ||
        contains(github.event.comment.body, '/au' )
      )
    runs-on: ubuntu-latest
    steps:
      - name: Add autoupdate label
        uses: actions/github-script@v5
        with:
          github-token: ${{ secrets.GH_TOKEN }}
          script: |
            github.rest.issues.addLabels({
              issue_number: context.issue.number,
              owner: context.repo.owner,
              repo: context.repo.repo,
              labels: ['autoupdate']
            })