bug#18689: guix-register test fails

[Ludovic Courtès]

Philip Woods <address@hidden> skribis:

> + guix-register -p /home/elzair/Development/scheme/guix/t-register-4387
> error: creating directory `/gnu': Permission denied

Here ‘guix-register’ attempts to create /gnu/store if it doesn’t exist
yet, hence this error (I don’t have this error on my machine because
/gnu/store already exists.)

Could you apply the patch below (with ‘patch -p1 < foo.patch’), and then
run “make check TESTS=tests/guix-register.sh”, making sure that /gnu
does *not* already exist?

diff --git a/nix/guix-register/guix-register.cc 
b/nix/guix-register/guix-register.cc
index 92eedab..f5c610f 100644
--- a/nix/guix-register/guix-register.cc
+++ b/nix/guix-register/guix-register.cc
@@ -224,16 +224,16 @@ main (int argc, char *argv[])
     {
       argp_parse (&argp, argc, argv, 0, 0, 0);
 
+      /* Instantiate the store.  This creates any missing directories among
+        'settings.nixStore', 'settings.nixDBPath', etc.  */
+      LocalStore store;
+
       if (!prefix.empty ())
        /* Under the --prefix tree, the final name of the store will be
           NIX_STORE_DIR.  Set it here so that the database uses file names
           prefixed by NIX_STORE_DIR and not PREFIX + NIX_STORE_DIR.  */
        settings.nixStore = NIX_STORE_DIR;
 
-      /* Instantiate the store.  This creates any missing directories among
-        'settings.nixStore', 'settings.nixDBPath', etc.  */
-      LocalStore store;
-
       register_validity (&store, *input, deduplication);
     }
   catch (std::exception &e)

Thanks in advance,
Ludo’.