find PRs from forks

src/adapter/get-prs-associated-with-commit.ts

@@ -7,9 +7,18 @@ export default async function getPullRequestsAssociatedWithCommits(
   octokit: InstanceType<typeof GitHub>,
   sha: string
 ): Promise<PR[]> {
+  const triggeredFromPR =
+    github.context.eventName === 'pull_request' ||
+    github.context.eventName === 'pull_request_target'
+  const owner = triggeredFromPR
+    ? github.context.payload.pull_request?.head.repo.owner.login
+    : github.context.repo.owner
+  const repo = triggeredFromPR
+    ? github.context.payload.pull_request?.head.repo.name
+    : github.context.repo.repo
   const result = await octokit.rest.repos.listPullRequestsAssociatedWithCommit({
-    owner: github.context.repo.owner,
-    repo: github.context.repo.repo,
+    owner,
+    repo,
     commit_sha: sha
   })
   core.debug(`Used url to fetch associated PRs: ${result.url}`)