From acad8cceb7a60833a54650ff84300a21af754434 Mon Sep 17 00:00:00 2001
From: Jorge Aparicio <japaricious@gmail.com>
Date: Thu, 1 Dec 2016 13:17:01 -0500
Subject: [PATCH] don't rebuild alloc_jemalloc if jemalloc's .git directory has
 changed

the .git directory is modified by `bootstrap` when it updates this git
submodule; this triggered rebuilds every time `bootstrap` was called.

likely fixes #38094
---
 src/liballoc_jemalloc/build.rs | 1 +
 1 file changed, 1 insertion(+)

diff --git a/src/liballoc_jemalloc/build.rs b/src/liballoc_jemalloc/build.rs
index 08a1f8ae8c6ca..50149dfd65f78 100644
--- a/src/liballoc_jemalloc/build.rs
+++ b/src/liballoc_jemalloc/build.rs
@@ -69,6 +69,7 @@ fn main() {
         .read_dir()
         .unwrap()
         .map(|e| e.unwrap())
+        .filter(|e| &*e.file_name() != ".git")
         .collect::<Vec<_>>();
     while let Some(entry) = stack.pop() {
         let path = entry.path();