From 93e494ef84ba8e3de98da2927beaf09ecfa946d7 Mon Sep 17 00:00:00 2001
From: Aiqiao Yan <55104035+aiqiaoy@users.noreply.github.com>
Date: Tue, 7 Jul 2026 16:34:55 -0400
Subject: backport `allow-unsafe-pr-checkout` to v5 (#2501)

* block checking out fork pr for pull_request_target and workflow_run (#2454)

* block checking out fork pr for some events

* address copilot and reviewer feedback

* run prettier formatting

* build

* update urls

* update readme

* update description and url again

* edit url one more time

* update error wording (#2467)
---
 src/input-helper.ts | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

(limited to 'src/input-helper.ts')

diff --git a/src/input-helper.ts b/src/input-helper.ts
index 059232f..2535148 100644
--- a/src/input-helper.ts
+++ b/src/input-helper.ts
@@ -2,6 +2,7 @@ import * as core from '@actions/core'
 import * as fsHelper from './fs-helper'
 import * as github from '@actions/github'
 import * as path from 'path'
+import * as unsafePrCheckoutHelper from './unsafe-pr-checkout-helper'
 import * as workflowContextHelper from './workflow-context-helper'
 import {IGitSourceSettings} from './git-source-settings'
 
@@ -161,5 +162,18 @@ export async function getInputs(): Promise<IGitSourceSettings> {
   result.githubServerUrl = core.getInput('github-server-url')
   core.debug(`GitHub Host URL = ${result.githubServerUrl}`)
 
+  // Allow unsafe PR checkout (opt-in for pull_request_target / workflow_run fork PRs)
+  result.allowUnsafePrCheckout =
+    (core.getInput('allow-unsafe-pr-checkout') || 'false').toUpperCase() ===
+    'TRUE'
+  core.debug(`allow unsafe PR checkout = ${result.allowUnsafePrCheckout}`)
+
+  unsafePrCheckoutHelper.assertSafePrCheckout({
+    qualifiedRepository,
+    ref: result.ref,
+    commit: result.commit,
+    allowUnsafePrCheckout: result.allowUnsafePrCheckout
+  })
+
   return result
 }
-- 
cgit v1.2.3