Use queryPathFromHashPart to look up binary cache requests efficiently

Dependencies

• [2] IDT3SO3P Generate *.narinfo files on the fly to support the binary cache substituter
• [3] AFEKITYD Fix some warnings about undefined values
• [4] MVB7RRLT * Move NARs from the NixChannel controller to the Root controller and
• [*] J5UVLXOK * Start of a basic Catalyst web interface.

Change contents

• replacement in src/lib/Hydra/Controller/Root.pm at line 201
  [2.74]→[2.74:468](∅→∅)
  − # FIXME: doing a glob is very inefficient. Should do a database

  − # lookup.

  − my @glob = glob("/nix/store/$hash*");

  − foreach my $storePath (@glob) {

  − if (isValidPath($storePath)) {

  − print STDERR "FOUND: $hash -> $storePath\n";

  − return $storePath;

  − }

  − #return $storePath if isValidPath($storePath);

  − }

  − notFound($c, "Store path with hash ‘$hash’ does not exist.");
  [2.74]

  [2.468]
  + my $path = queryPathFromHashPart($hash);

  + notFound($c, "Store path with hash ‘$hash’ does not exist.") unless $path;

  + return $path;