Write Hydra roots as regular files instead of symlinks

Dependencies

• [2] NCYM2P3D Derivations with multiple outputs break the 'link name is store path' assumption
• [3] DKINJZTI Fix hydra-update-gc-roots
• [4] 3D3F5I74 Fix race between hydra-eval-jobs and hydra-update-gc-roots
• [5] 2T42QGZD * Register builds as GC roots so they don't get deleted.
• [6] UGA45FNC Add a plugin for backing up builds in s3
• [7] IN272KZW * Automatically keep all builds in the latest successful release in
• [8] WZ3AEJ67 * hydra_update_gc_roots.pl registers build outputs that should be kept
• [9] A63IHCMX * Register GC roots properly.
• [10] F5RYSE7T qualify order by column
• [*] 2GK5DOU7 * Downloading closures.

Change contents

• edit in src/lib/Hydra/Helper/Nix.pm at line 81
  [4.931]→[4.134:135](∅→∅)
  −
• replacement in src/lib/Hydra/Helper/Nix.pm at line 82
  [4.968]→[4.136:137](∅→∅),[4.137]→[4.369:420](∅→∅),[4.369]→[4.369:420](∅→∅),[4.420]→[4.969:1032](∅→∅),[4.1032]→[4.488:494](∅→∅),[4.488]→[4.488:494](∅→∅)
  −

  − if (!-l $link) {

  − symlink($path, $link)

  − or die "cannot create GC root `$link' to `$path'";

  − }
  [4.968]

  [4.751]
  + open ROOT, ">$link" or die "cannot create GC root `$link' to `$path'";

  + close ROOT;
• replacement in src/script/hydra-s3-backup-collect-garbage at line 35
  [4.8512]→[2.0:54](∅→∅)
  − push @actual_roots, readlink "$gcRootsDir/$link";
  [4.8512]

  [4.8571]
  + push @actual_roots, $Nix::Config::storeDir . "/" . $link;
• replacement in src/script/hydra-update-gc-roots at line 133
  [4.261]→[3.0:59](∅→∅)
  − my $st = lstat("$gcRootsDir/$link");

  − if (!defined $st) {
  [4.261]

  [3.59]
  + my $st = lstat("$gcRootsDir/$link");

  + if (!defined $st) {
• replacement in src/script/hydra-update-gc-roots at line 136
  [3.113]→[3.113:159](∅→∅)
  − } elsif ($st->ctime < $now - 24 * 60 * 60) {
  [3.113]

  [4.318]
  + } elsif ($st->ctime < $now - 24 * 60 * 60) {