I have set up a Github Actions workflow that sets every PR to auto-merge when all the checks pass. When I manually do this through the browser by clicking the auto-merge button the PR, it works fine but through the workflow, most of the time the PR ends up stuck at “Attempting to auto-merge…”.

Sometimes when the merge is successful, the PR ends up merged but stays open. All the configured actions that should run when a commit is pushed to the merged branch also didn’t run. I haven’t found a way to reliably reproduce this yet.

screenshot-gh985×572 54.6 KB

Here’s a simplified version of my workflow file:

name: PR Automerge
on:

pull_request:

types: [opened, reopened, edited, ready_for_review]
env:

PR_URL: ${{github.event.pull_request.html_url}}
jobs:

enable-auto-merge:

runs-on: ubuntu-latest

steps:

- name: Enable auto-merge

run: gh pr merge --auto --squash "$PR_URL"

env:

GITHUB_TOKEN: ${{secrets.GITHUB_TOKEN}}