use NIX_*_DIR env vars when defined

Dependencies

• [2] MVB7RRLT * Move NARs from the NixChannel controller to the Root controller and
• [3] QBQSQOSY hydra: moved getbuildlog
• [4] RBGYFVWX use HYDRA_DATA/hydra.conf as default location for hydra.conf
• [5] AFTXA575 * $HYDRA_DATA environment variable.
• [6] A63IHCMX * Register GC roots properly.
• [7] J5UVLXOK * Start of a basic Catalyst web interface.
• [8] LZO3C2KI * Hack around those SQLite timeouts: just retry the transaction.
• [9] C7CXMZ66 hydra: do not perform git clone every time. in stead work on local clone and pull
• [10] 2T42QGZD * Register builds as GC roots so they don't get deleted.
• [11] 5NO7NCKT * Refactoring.
• [12] SMM4HQTP * Put actions related to builds under /build (e.g. /log/<buildid>
• [13] NYC3LZKH * Generate NAR archives on the fly. Necessary for producing channels
• [*] ZWCTAZGL added newsitems, added some admin options to clear various caches.
• [*] JLDUSNUO * Unify rendering of finished and scheduled builds.
• [*] OOQ2D3KC * Refactoring: move fetchInput out of hydra_scheduler into a separate
• [*] 2GK5DOU7 * Downloading closures.

Change contents

• edit in src/lib/Hydra/Controller/Root.pm at line 33
  [15.2335]

  [16.52]
  + # $c->stash->{nrbuilds} = [nrbuildsQuery($c, 30, "day", "", "", "", "")];

  + # <img src="http://chart.apis.google.com/chart?cht=bvg&chtt=Nr%20builds%20over%20the%20last%2030%20days&chs=300x100&chd=t:1785,881,2863,2828,1472,2847,1449,5634,1625,1200,1576,700,839,8533,1439,361,991,1337,1234,1322,1883,2146,1553,883,378,1395,1204,527,1147,124&chco=BBCEBB&chds=0,8533&chbh=a&chxt=y&chxr=0,0,8533"/>
• replacement in src/lib/Hydra/Controller/Root.pm at line 191
  [5.2637]→[2.423:455](∅→∅)
  − $path = "/nix/store/$path";
  [5.2637]

  [5.2637]
  + $path = ($ENV{NIX_STORE_DIR}."/$path" || "/nix/store/$path" );
• replacement in src/lib/Hydra/Helper/AddBuilds.pm at line 24
  [3.157]→[3.157:221](∅→∅)
  − my $logPath = "/nix/var/log/nix/drvs/" . basename $drvPath;
  [3.157]

  [3.221]
  + my $logPath = ($ENV{NIX_LOG_DIR} || "/nix/var/log/nix"). "/drvs/" . basename $drvPath;
• replacement in src/lib/Hydra/Helper/Nix.pm at line 33
  [4.164]→[4.164:306](∅→∅)
  − my $conf = $ENV{"HYDRA_CONF"} || (getHydraPath . "/hydra.conf");

  − die "The HYDRA_CONF file ($conf) does not exist!\n" unless -f $conf;
  [4.164]

  [4.306]
  + my $conf = $ENV{"HYDRA_CONFIG"} || (getHydraPath . "/hydra.conf");

  + die "The HYDRA_CONFIG file ($conf) does not exist!\n" unless -f $conf;
• replacement in src/lib/Hydra/Helper/Nix.pm at line 77
  [5.111]→[5.707:780](∅→∅)
  − my $dir = "/nix/var/nix/gcroots/per-user/$ENV{LOGNAME}/hydra-roots";
  [5.111]

  [5.780]
  + my $dir = ($ENV{NIX_STATE_DIR} || "/nix/var/nix" ) . "/gcroots/per-user/$ENV{LOGNAME}/hydra-roots";