Make negative narinfo responses much smaller

Dependencies

• [2] UD2WKDUV Use queryPathFromHashPart to look up binary cache requests efficiently
• [3] XE6HD7BP Provide the nix-cache-info file required by the binary cache substituter
• [4] LSZLZHJY Allow users to edit their own settings
• [5] MVB7RRLT * Move NARs from the NixChannel controller to the Root controller and
• [6] SZYDW2DG hydra: added some user admin
• [7] AFEKITYD Fix some warnings about undefined values
• [8] IDT3SO3P Generate *.narinfo files on the fly to support the binary cache substituter
• [*] J5UVLXOK * Start of a basic Catalyst web interface.

Change contents

• replacement in src/lib/Hydra/Controller/Root.pm at line 218
  [3.684]→[3.0:42](∅→∅)
  − sub hashToPath {

  − my ($c, $hash) = @_;
  [3.684]

  [3.42]
  + sub narinfo :LocalRegex('^([a-z0-9]+).narinfo$') :Args(0) {

  + my ($self, $c) = @_;

  + my $hash = $c->req->captures->[0];

  +
• edit in src/lib/Hydra/Controller/Root.pm at line 224
  [2.45]→[2.45:146](∅→∅),[2.146]→[3.468:470](∅→∅),[3.468]→[3.468:470](∅→∅)
  − notFound($c, "Store path with hash ‘$hash’ does not exist.") unless $path;

  − return $path;

  − }
• replacement in src/lib/Hydra/Controller/Root.pm at line 225
  [3.471]→[3.471:532](∅→∅),[3.532]→[3.193:218](∅→∅),[3.193]→[3.193:218](∅→∅),[3.218]→[3.533:624](∅→∅)
  −

  − sub narinfo :LocalRegex('^([a-z0-9]+).narinfo$') :Args(0) {

  − my ($self, $c) = @_;

  − my $hash = $c->req->captures->[0];

  − $c->stash->{storePath} = hashToPath($c, $hash);
  [3.471]

  [3.624]
  + if (!$path) {

  + $c->response->content_type('text/plain');

  + $c->stash->{'plain'}->{'data'} = "does not exist\n";

  + $c->forward('Hydra::View::Plain');

  + }

  +

  + $c->stash->{storePath} = $path;