From bd62290c23fa15181e8af75c5055e104900f8532 Mon Sep 17 00:00:00 2001
From: Eelco Dolstra <edolstra@gmail.com>
Date: Fri, 12 Jul 2019 12:59:00 +0200
Subject: [PATCH] fetchGit: Warn about dirty trees

---
 src/libexpr/primops/fetchGit.cc | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/src/libexpr/primops/fetchGit.cc b/src/libexpr/primops/fetchGit.cc
index 10cd2470a..940cf3022 100644
--- a/src/libexpr/primops/fetchGit.cc
+++ b/src/libexpr/primops/fetchGit.cc
@@ -46,6 +46,8 @@ GitInfo exportGit(ref<Store> store, std::string uri,
             /* This is an unclean working tree. So copy all tracked
                files. */
 
+            warn("Git tree '%s' is dirty", uri);
+
             GitInfo gitInfo;
             gitInfo.ref = "HEAD";