Add a Store::addToStore() variant that accepts a NAR

As a side effect, this ensures that signatures are propagated when
copying paths between stores.

Also refactored import/export to make use of this.

1 files changed, 2 insertions, 13 deletions

diff --git a/src/libstore/store-api.cc b/src/libstore/store-api.cc
index c6cc46c6096d..8600def627fa 100644
--- a/src/libstore/store-api.cc
+++ b/src/libstore/store-api.cc
@@ -363,10 +363,9 @@ void copyStorePath(ref<Store> srcStore, ref<Store> dstStore,
     auto info = srcStore->queryPathInfo(storePath);
 
     StringSink sink;
-    srcStore->exportPaths({storePath}, sink);
+    srcStore->narFromPath({storePath}, sink);
 
-    StringSource source(*sink.s);
-    dstStore->importPaths(source, 0);
+    dstStore->addToStore(*info, *sink.s);
 }
 
 
@@ -406,16 +405,6 @@ string showPaths(const PathSet & paths)
 }
 
 
-void Store::exportPaths(const Paths & paths, Sink & sink)
-{
-    for (auto & i : paths) {
-        sink << 1;
-        exportPath(i, sink);
-    }
-    sink << 0;
-}
-
-
 std::string ValidPathInfo::fingerprint() const
 {
     if (narSize == 0 || !narHash)