From b9bdb1766d68dbe5da0e0cd65b2227186004d2cf Mon Sep 17 00:00:00 2001
From: Josh Stone <jistone@redhat.com>
Date: Tue, 25 Apr 2017 15:58:07 -0700
Subject: [PATCH] Reduce the contents of the rust-src component

---
 src/bootstrap/dist.rs | 30 +++++++++++++++++++++++++++++-
 1 file changed, 29 insertions(+), 1 deletion(-)

diff --git a/src/bootstrap/dist.rs b/src/bootstrap/dist.rs
index e8c9a96b2214f..7e04b3660cd33 100644
--- a/src/bootstrap/dist.rs
+++ b/src/bootstrap/dist.rs
@@ -480,7 +480,35 @@ pub fn rust_src(build: &Build) {
     let dst_src = dst.join("rust");
     t!(fs::create_dir_all(&dst_src));
 
-    cp_r(&plain_dst_src, &dst_src);
+    // This is the reduced set of paths which will become the rust-src component
+    // (essentially libstd and all of its path dependencies)
+    let std_src_dirs = [
+        "src/build_helper",
+        "src/liballoc",
+        "src/liballoc_jemalloc",
+        "src/liballoc_system",
+        "src/libcollections",
+        "src/libcompiler_builtins",
+        "src/libcore",
+        "src/liblibc",
+        "src/libpanic_abort",
+        "src/libpanic_unwind",
+        "src/librand",
+        "src/librustc_asan",
+        "src/librustc_lsan",
+        "src/librustc_msan",
+        "src/librustc_tsan",
+        "src/libstd",
+        "src/libstd_unicode",
+        "src/libunwind",
+        "src/rustc/libc_shim",
+    ];
+
+    for item in &std_src_dirs {
+        let dst = &dst_src.join(item);
+        t!(fs::create_dir_all(dst));
+        cp_r(&plain_dst_src.join(item), dst);
+    }
 
     // Create source tarball in rust-installer format
     let mut cmd = Command::new(SH_CMD);