GitHub action for issue_comment doesn't shown in checks for PR

Question

I created a GitHub action on:issue_comment, I can see the flow running only in the action tab, but not in the PR, where I made the comment. I want to comment in a PR and trigger a check on that PR (not on master)

here is my workflow:

name: issue-comment-CI-test 

on: 
  issue_comment:    
    types: [created]    
jobs:   
  build:    

    runs-on: ubuntu-latest  

    steps:  
    - uses: actions/checkout@v1 
    - name: Run a one-line script   
      run: echo Hello, world!   
    - name: Run a multi-line script 
      run: echo ${{ github.event.comment.body }}

currently, I'm just printing the comment body, But I plan to check the body, and if it is equal to "run integration tests" then I'll run my integration tests (maven)

Answer 1

Basically you need to checkout to the PR origin. For that, first make a API request to the pr url and fetch all ref. Then do the checkout on the fetched repo and branch.

Step1

- name: Github API Request
    id: request
    uses: octokit/[email protected]
    with:
      route: ${{ github.event.issue.pull_request.url }}
    env:
      GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}

Step 2

- name: Checkout PR Branch
    uses: actions/checkout@v2
    with:
      token: ${{ secrets.GITHUB_TOKEN }}
      repository: ${{ fromJson(steps.request.outputs.data).head.repo.full_name }}
      ref: ${{ steps.pr_data.outputs.branch }}

You can follow the following example, specially the GitHub API Request part. I've also implemented it in one of our workflows, you can take reference from that as well.

https://github.com/adrianjost/workflow-trigger-comment-example/blob/master/.github/workflows/demo.yml https://github.com/TeamAmaze/AmazeFileManager/blob/master/.github/workflows/android-debug-artifact-ondemand.yml

Answer 2

Used built-in gh command to fetch the branch instead of using actions/checkout.

name: issue-comment-CI-test

on:
  issue_comment:
    types: [created]

jobs:
  build:
    runs-on: ubuntu-latest
    steps:
    - uses: actions/checkout@v3
    - run: |
        gh pr checkout ${{ github.event.issue.number }}
        # do your job...
      env:
        GH_TOKEN: ${{ secrets.GITHUB_TOKEN }} # required for gh