* Unify the treatment of sources copied to the store, and recursive

  SHA-256 outputs of fixed-output derivations.  I.e. they now produce
  the same store path:

  $ nix-store --add x
  /nix/store/j2fq9qxvvxgqymvpszhs773ncci45xsj-x

  $ nix-store --add-fixed --recursive sha256 x
  /nix/store/j2fq9qxvvxgqymvpszhs773ncci45xsj-x

  the latter being the same as the path that a derivation

    derivation {
      name = "x";
      outputHashAlgo = "sha256";
      outputHashMode = "recursive";
      outputHash = "...";
      ...
    };

  produces.

  This does change the output path for such fixed-output derivations.
  Fortunately they are quite rare.  The most common use is fetchsvn
  calls with SHA-256 hashes.  (There are a handful of those is
  Nixpkgs, mostly unstable development packages.)
  
* Documented the computation of store paths (in store-api.cc).

1 files changed, 2 insertions, 2 deletions

diff --git a/src/nix-worker/nix-worker.cc b/src/nix-worker/nix-worker.cc
index 1ba74f46fee9..e4fe94926b63 100644
--- a/src/nix-worker/nix-worker.cc
+++ b/src/nix-worker/nix-worker.cc
@@ -290,7 +290,7 @@ static void performOp(unsigned int clientVersion,
     case wopAddToStore: {
         /* !!! uberquick hack */
         string baseName = readString(from);
-        bool fixed = readInt(from) == 1;
+        readInt(from); /* obsolete; was `fixed' flag */
         bool recursive = readInt(from) == 1;
         string hashAlgo = readString(from);
         
@@ -300,7 +300,7 @@ static void performOp(unsigned int clientVersion,
         restorePath(tmp2, from);
 
         startWork();
-        Path path = store->addToStore(tmp2, fixed, recursive, hashAlgo);
+        Path path = store->addToStore(tmp2, recursive, hashAlgo);
         stopWork();
         
         writeString(path, to);