* Better error reporting in readmanifest.

* Use force flag in `mv' to prevent silly interactive questions (this
  happens with shared Nix stores).

scripts/nix-pull.in

@@ -51,7 +51,7 @@ sub processURL {
     
     my $finalPath = "$stateDir/manifests/$baseName-$hash.nixmanifest";
     
-    system("mv '$manifest' '$finalPath'") == 0
+    system("mv -f '$manifest' '$finalPath'") == 0
         or die "cannot move `$manifest' to `$finalPath";
 }
 

scripts/readmanifest.pm.in

@@ -35,7 +35,8 @@ sub readManifest {
     my $patches = shift;
     my $successors = shift;
 
-    open MANIFEST, "<$manifest";
+    open MANIFEST, "<$manifest"
+        or die "cannot open `$manifest': $!";
 
     my $inside = 0;
     my $type;