issue-release-workflow: Add support for /cherry-pick command in issue body

[tstellar]

Add back condition to limit action to llvm/llvm-project repo

[alexbatashev]

.github/workflows/issue-release-workflow.yml

36

My understanding of https://docs.github.com/en/actions/learn-github-actions/expressions#contains is that contains accepts either strings or arrays. Here I'm not sure what the resulting type would be. github.event.action == 'opened' is boolean expression, and the last two are strings. @tstellar could you please explain what this line is doing?

[tstellar]

.github/workflows/issue-release-workflow.yml

36

This is how you emulate a ternary operator with the GitHub actions expression. So it's github.event.action == 'opened' ? github.event.issue.body : github.event.comment.body. The resulting value/type comes from the last expression that is executed.

[alexbatashev]

.github/workflows/issue-release-workflow.yml

36

Wow! Cool stuff. Thanks for explanation.

[kwk]

.github/workflows/issue-release-workflow.yml

36

Why not use the COMMENT_BODY from above here? Isn't that possible?

[tstellar]

.github/workflows/issue-release-workflow.yml

36

I tried and it doesn't work. The docs also say that the env context can only be used in steps.

[kwk]

LGTM. I assume you've tested that it works because with github.repository == 'llvm/llvm-project' I'm not able to test this ;)

.github/workflows/issue-release-workflow.yml

 
 name: Issue Release Workflow
 
 on:
   issue_comment:
     types:
       - created
       - edited
+  issues:
+    types:
+      - opened
 
 env:
-  COMMENT_BODY: ${{ github.event.comment.body }}
+  COMMENT_BODY: ${{ github.event.action == 'opened' && github.event.issue.body || github.event.comment.body  }}
 
 jobs:
   backport-commits:
     name: Backport Commits
     runs-on: ubuntu-20.04
     if: >-
         (github.repository == 'llvm/llvm-project') &&
         !startswith(github.event.comment.body, '<!--IGNORE-->') &&
-        contains(github.event.comment.body, '/cherry-pick')
+        contains(github.event.action == 'opened' && github.event.issue.body || github.event.comment.body, '/cherry-pick')
     steps:
       - name: Fetch LLVM sources
         uses: actions/checkout@v2
         with:
           repository: llvm/llvm-project
           # GitHub stores the token used for checkout and uses it for pushes
           # too, but we want to use a different token for pushing, so we need
           # to disable persist-credentials here.