From a2c27022e9afc394e08d34d349587c8903fc1a97 Mon Sep 17 00:00:00 2001
From: Eelco Dolstra <edolstra@gmail.com>
Date: Thu, 9 Jul 2020 15:54:32 +0200
Subject: [PATCH] LocalStore::addToStore(srcPath): Handle the flat case

This helps nix-prefetch-url when using a local store.
---
 src/libstore/local-store.cc | 20 +++++++++++++-------
 1 file changed, 13 insertions(+), 7 deletions(-)

diff --git a/src/libstore/local-store.cc b/src/libstore/local-store.cc
index fa66c1c90..69f149841 100644
--- a/src/libstore/local-store.cc
+++ b/src/libstore/local-store.cc
@@ -1097,16 +1097,13 @@ StorePath LocalStore::addToStore(const string & name, const Path & _srcPath,
 {
     Path srcPath(absPath(_srcPath));
 
-    if (method != FileIngestionMethod::Recursive)
-        return addToStoreFromDump(readFile(srcPath), name, method, hashAlgo, repair);
-
     /* For computing the NAR hash. */
     auto sha256Sink = std::make_unique<HashSink>(htSHA256);
 
     /* For computing the store path. In recursive SHA-256 mode, this
        is the same as the NAR hash, so no need to do it again. */
     std::unique_ptr<HashSink> hashSink =
-        hashAlgo == htSHA256
+        method == FileIngestionMethod::Recursive && hashAlgo == htSHA256
         ? nullptr
         : std::make_unique<HashSink>(hashAlgo);
 
@@ -1139,7 +1136,10 @@ StorePath LocalStore::addToStore(const string & name, const Path & _srcPath,
             if (!inMemory) sink(buf, len);
         });
 
-        dumpPath(srcPath, sink2, filter);
+        if (method == FileIngestionMethod::Recursive)
+            dumpPath(srcPath, sink2, filter);
+        else
+            readFile(srcPath, sink2);
     });
 
     std::unique_ptr<AutoDelete> delTempDir;
@@ -1155,7 +1155,10 @@ StorePath LocalStore::addToStore(const string & name, const Path & _srcPath,
         delTempDir = std::make_unique<AutoDelete>(tempDir);
         tempPath = tempDir + "/x";
 
-        restorePath(tempPath, *source);
+        if (method == FileIngestionMethod::Recursive)
+            restorePath(tempPath, *source);
+        else
+            writeFile(tempPath, *source);
 
     } catch (EndOfFile &) {
         if (!inMemory) throw;
@@ -1188,7 +1191,10 @@ StorePath LocalStore::addToStore(const string & name, const Path & _srcPath,
             if (inMemory) {
                 /* Restore from the NAR in memory. */
                 StringSource source(nar);
-                restorePath(realPath, source);
+                if (method == FileIngestionMethod::Recursive)
+                    restorePath(realPath, source);
+                else
+                    writeFile(realPath, source);
             } else {
                 /* Move the temporary path we restored above. */
                 if (rename(tempPath.c_str(), realPath.c_str()))