* 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, 21 insertions, 6 deletions

diff --git a/tests/add.sh b/tests/add.sh
index 83092b26c1..7ea4cb6d6a 100644
--- a/tests/add.sh
+++ b/tests/add.sh
@@ -1,13 +1,28 @@
 source common.sh
 
-file=./add.sh
+path1=$($nixstore --add ./dummy)
+echo $path1
 
-path=$($nixstore --add $file)
+path2=$($nixstore --add-fixed sha256 --recursive ./dummy)
+echo $path2
 
-echo $path
+if test "$path1" != "$path2"; then
+    echo "nix-store --add and --add-fixed mismatch"
+    exit 1
+fi    
 
-hash=$($nixstore -q --hash $path)
+path3=$($nixstore --add-fixed sha256 ./dummy)
+echo $path3
+test "$path1" != "$path3" || exit 1
 
-echo $hash
+path4=$($nixstore --add-fixed sha1 --recursive ./dummy)
+echo $path4
+test "$path1" != "$path4" || exit 1
 
-test "$hash" = "sha256:$($nixhash --type sha256 --base32 $file)"
+hash1=$($nixstore -q --hash $path1)
+echo $hash1
+
+hash2=$($nixhash --type sha256 --base32 ./dummy)
+echo $hash2
+
+test "$hash1" = "sha256:$hash2"