Checkout: Checkout on pull_request -> closed event

[luludan]

Is there a way to checkout the code of a PR when closing the PR?

We are spinning up an environment per PR and need some config from the repo to help tear it down when closing the PR.

Currently it tries to checkout the branch based off the special github pr branch

[filipesilvaa]

hi @luludan try to use another ref, by default, actions/checkout uses ${{ github.ref }} which referes to something like: refs/pull/#/merge

an example, referencing another ref:

- uses: actions/checkout@v1
  with:
    ref: refs/heads/${{ github.head_ref }} # it could be ${{ github.base_ref }} also

[ericsciple]

i'll play around with this, i think i might know a way.

if you have the on: syntax handy, please provide

[filipesilvaa]

hi @ericsciple thanks for your support,

here is a sample of .yml:

name: Build

on:
  pull_request:
    branches:
    - master
    types: [opened, synchronize, closed]

jobs:
  build:
    runs-on: ubuntu-latest

    steps:
    - name: Git Checkout PR Ref
      if: github.event.action != 'closed'
      uses: actions/checkout@v1

    - name: Git Checkout Base Ref
      if: github.event.pull_request.merged == true
      uses: actions/checkout@v1
      with:
        ref: refs/heads/${{ github.base_ref }}

[ericsciple]

@luludan v2 happens to fix the issue you were hitting. V2 fetches the specific SHA rather than the ref.

This just works:

on:
  pull_request:
    branches:
    - master
    types: [opened, synchronize, closed]
jobs:
  build:
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v2

[fezho]

@ericsciple I got an issue when using goveralls, https://github.com/mattn/goveralls/issues/150
And I think it's because checkout fetches the specific SHA rather than the ref, however goveralls gets the wrong sha:

    if os.Getenv("GITHUB_EVENT_NAME") == "pull_request" {
        ghPR := getGithubEvent()["pull_request"].(map[string]interface{})
        ghHead := ghPR["head"].(map[string]interface{})
        commitRef = ghHead["sha"].(string)
    }

This can be fixed by using ref: ${{ github.event.pull_request.head.sha }}, but i do not want to use it when push to master. Any advice to fix this issue?