From 10f9a8e77d504354deafbcf7351a6d46d4528542 Mon Sep 17 00:00:00 2001
From: Eelco Dolstra <edolstra@gmail.com>
Date: Fri, 15 Oct 2021 16:52:37 +0200
Subject: Add a test for the non-blocking GC

---
 src/libstore/gc.cc | 4 ++++
 1 file changed, 4 insertions(+)

(limited to 'src')

diff --git a/src/libstore/gc.cc b/src/libstore/gc.cc
index 648295684..5e8cbf8fc 100644
--- a/src/libstore/gc.cc
+++ b/src/libstore/gc.cc
@@ -735,6 +735,10 @@ void LocalStore::collectGarbage(const GCOptions & options, GCResults & results)
         }
     };
 
+    /* Synchronisation point for testing, see tests/gc-concurrent.sh. */
+    if (auto p = getEnv("_NIX_TEST_GC_SYNC"))
+        readFile(*p);
+
     /* Either delete all garbage paths, or just the specified
        paths (for gcDeleteSpecific). */
     if (options.action == GCOptions::gcDeleteSpecific) {
-- 
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