Drop remaining uses of external "tar"

Also, fetchGit now runs in O(1) memory since we pipe the output of
'git archive' directly into unpackTarball() (rather than first reading
it all into memory).

1 files changed, 1 insertions, 11 deletions

diff --git a/src/libstore/builtins/unpack-channel.cc b/src/libstore/builtins/unpack-channel.cc
index 5fc68cd66..d18e3ddaf 100644
--- a/src/libstore/builtins/unpack-channel.cc
+++ b/src/libstore/builtins/unpack-channel.cc
@@ -1,5 +1,4 @@
 #include "builtins.hh"
-#include "compression.hh"
 #include "tarfile.hh"
 
 namespace nix {
@@ -18,16 +17,7 @@ void builtinUnpackChannel(const BasicDerivation & drv)
 
     createDirs(out);
 
-    auto source = sinkToSource([&](Sink & sink) {
-        auto decompressor =
-            hasSuffix(src, ".bz2") ? makeDecompressionSink("bzip2", sink) :
-            hasSuffix(src, ".xz") ? makeDecompressionSink("xz", sink) :
-            makeDecompressionSink("none", sink);
-        readFile(src, *decompressor);
-        decompressor->finish();
-    });
-
-    unpackTarfile(*source, out);
+    unpackTarfile(src, out);
 
     auto entries = readDirectory(out);
     if (entries.size() != 1)