Merge pull request #2748 from edolstra/rust

Make nix/unpack-channel.nix a builtin builder

1 files changed, 7 insertions, 4 deletions

diff --git a/src/libexpr/primops/fetchGit.cc b/src/libexpr/primops/fetchGit.cc
index 7ef3b3823..9d0c64291 100644
--- a/src/libexpr/primops/fetchGit.cc
+++ b/src/libexpr/primops/fetchGit.cc
@@ -4,6 +4,7 @@
 #include "store-api.hh"
 #include "pathlocks.hh"
 #include "hash.hh"
+#include "tarfile.hh"
 
 #include <sys/time.h>
 
@@ -164,14 +165,16 @@ GitInfo exportGit(ref<Store> store, const std::string & uri,
         if (e.errNo != ENOENT) throw;
     }
 
-    // FIXME: should pipe this, or find some better way to extract a
-    // revision.
-    auto tar = runProgram("git", true, { "-C", cacheDir, "archive", gitInfo.rev });
+    auto source = sinkToSource([&](Sink & sink) {
+        RunOptions gitOptions("git", { "-C", cacheDir, "archive", gitInfo.rev });
+        gitOptions.standardOut = &sink;
+        runProgram2(gitOptions);
+    });
 
     Path tmpDir = createTempDir();
     AutoDelete delTmpDir(tmpDir, true);
 
-    runProgram("tar", true, { "x", "-C", tmpDir }, tar);
+    unpackTarfile(*source, tmpDir);
 
     gitInfo.storePath = store->addToStore(name, tmpDir);