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Myles AndersonandClaude Opus 5.5 13d7c1fd44 Require fork PRs to link an issue (#425)
Add a `linked issue` check that fails PRs from forks unless the
description links an issue in this repository. PRs from branches in the
repo are exempt. It runs on pull_request_target so a fork cannot edit its
own check, and never checks out PR code.

Co-authored-by: Claude Opus 5.5 <noreply@anthropic.com>
2026-09-23 12:57:56 -07:00

50 lines
1.9 KiB
YAML

name: Linked issue
on:
# Runs main's copy of this workflow, so a fork PR can't edit its own check. It never checks out PR code.
pull_request_target:
types: [opened, edited, reopened, synchronize]
permissions:
issues: read
pull-requests: read
jobs:
linked-issue:
name: linked issue
runs-on: ubuntu-latest
steps:
- name: Require a linked issue on fork PRs
env:
GH_TOKEN: ${{ github.token }}
HEAD_REPO: ${{ github.event.pull_request.head.repo.full_name }}
PR_NUMBER: ${{ github.event.pull_request.number }}
OWNER: ${{ github.repository_owner }}
REPO: ${{ github.event.repository.name }}
run: |
# Only people with write access can push branches here; author_association hides private org members.
if [ "$HEAD_REPO" = "$OWNER/$REPO" ]; then
echo "PR is from a branch in $OWNER/$REPO; no linked issue required."
exit 0
fi
linked=$(gh api graphql \
-F owner="$OWNER" -F repo="$REPO" -F number="$PR_NUMBER" \
-f query='query($owner: String!, $repo: String!, $number: Int!) {
repository(owner: $owner, name: $repo) {
pullRequest(number: $number) {
closingIssuesReferences(first: 10) { nodes { number repository { nameWithOwner } } }
}
}
}' \
--jq "[.data.repository.pullRequest.closingIssuesReferences.nodes[]
| select(.repository.nameWithOwner == \"$OWNER/$REPO\") | .number] | join(\", #\")")
if [ -n "$linked" ]; then
echo "Linked issue: #$linked"
exit 0
fi
echo "::error::PRs from forks must link an issue in $OWNER/$REPO. Add \"Closes #<number>\" (or Fixes/Resolves) to the PR description and this check re-runs automatically. No issue yet? Open one first: https://github.com/$OWNER/$REPO/issues/new"
exit 1