Fix reproduce script

Dependencies

• [2] ZH6B56XR Try harder to find build logs
• [3] 5Q4ZLL37 reproduce.tt: Add --help flag
• [4] 3G7OYUSE reproduce.tt: Check for the presence of commands like nix-build
• [5] MMJYE535 Also show number of evaluations of which a build is a part
• [6] LZVO64YG Merge in the first bits of the API work
• [7] FU4GO5VN On build pages, provide a link to the build's first eval
• [8] HZWUT4YN Allow users to reproduce builds on their own systems
• [*] LBNVQXUB * Build the /build stuff in a separate controller.
• [*] HSVVEKTY * Start of a JSON API to get information about a specific build.

Change contents

• replacement in src/lib/Hydra/Controller/Build.pm at line 102
  [3.100]→[2.392:457](∅→∅),[2.457]→[3.124:154](∅→∅),[3.124]→[3.124:154](∅→∅),[3.154]→[2.458:510](∅→∅)
  − $c->stash->{eval} = $c->stash->{build}->jobsetevals->search(

  − { hasnewbuilds => 1},

  − { rows => 1, order_by => ["id"] })->single;
  [3.100]

  [3.4281]
  + $c->stash->{eval} = getFirstEval($build);
• edit in src/lib/Hydra/Controller/Build.pm at line 555
  [3.317]

  [11.412]
  + $c->stash->{eval} = getFirstEval($c->stash->{build});
• replacement in src/root/reproduce.tt at line 82
  [3.846]→[3.846:883](∅→∅)
  − [%+ FOREACH input IN build.inputs %]
  [3.846]

  [3.883]
  + [% inputs = build.inputs.size > 0 ? build.inputs : eval.jobsetevalinputs %]

  +

  + [%+ FOREACH input IN inputs %]