From 542ae5c8f804b704101f9d27bd8b2aa62ded899c Mon Sep 17 00:00:00 2001
From: Eelco Dolstra <edolstra@gmail.com>
Date: Fri, 21 Oct 2016 16:50:28 +0200
Subject: BinaryCacheStore: Optionally write a NAR listing
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The store parameter "write-nar-listing=1" will cause BinaryCacheStore
to write a file ‘<store-hash>.ls.xz’ for each ‘<store-hash>.narinfo’
added to the binary cache. This file contains an XZ-compressed JSON
file describing the contents of the NAR, excluding the contents of
regular files.

E.g.

  {
    "version": 1,
    "root": {
      "type": "directory",
      "entries": {
        "lib": {
          "type": "directory",
          "entries": {
            "Mcrt1.o": {
              "type": "regular",
              "size": 1288
            },
            "Scrt1.o": {
              "type": "regular",
              "size": 3920
            },
          }
        }
      }
      ...
    }
  }

(The actual file has no indentation.)

This is intended to speed up the NixOS channels programs index
generator [1], since fetching gazillions of large NARs from
cache.nixos.org is currently a bottleneck for updating the regular
(non-small) channel.

[1] https://github.com/NixOS/nixos-channel-scripts/blob/master/generate-programs-index.cc
---
 src/libstore/export-import.cc | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

(limited to 'src/libstore/export-import.cc')

diff --git a/src/libstore/export-import.cc b/src/libstore/export-import.cc
index b7f43acf1..883b87217 100644
--- a/src/libstore/export-import.cc
+++ b/src/libstore/export-import.cc
@@ -117,7 +117,7 @@ Paths Store::importPaths(Source & source, std::shared_ptr<FSAccessor> accessor,
         if (readInt(source) == 1)
             readString(source);
 
-        addToStore(info, *tee.data, false, dontCheckSigs);
+        addToStore(info, tee.data, false, dontCheckSigs);
 
         if (accessor)
             addPathToAccessor(ref<FSAccessor>(accessor), info.path, tee.data);
-- 
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