hydra-queue-runner: --build-one: correctly handle a cached build

Dependencies

• [2] TDWT5RLH Periodically clear Store's path info cache
• [3] NJXD2ABJ Abort unsupported build steps
• [4] U55WNIDP Abort unsupported build steps
• [5] HJOEIMLR Refactor
• [6] EBJP3MNA Build against nix-master
• [7] GJV2J5HX Pool local store connections
• [8] NYTT5WP3 Keep track of the number of unsupported steps
• [9] WV4SSAIY Build against nix-master
• [10] OPN3PED2 Tweak
• [11] RND7XFNH getQueuedBuilds(): Periodically stop to handle priority bumps
• [12] HTDANBLN Merge pull request #730 from NixOS/flake
• [13] NKQOEVVP Get rid of "will retry" messages after "maybe cancelling..."
• [14] BRAESISH Warn if PostgreSQL appears stalled
• [15] EPWEMRI2 Allow determinism checking for entire jobsets
• [16] MJL3PDXI Fix duplicate step_finished notification
• [17] IKJBYIGY Update to reflect BinaryCacheStore changes
• [18] 73YR46NJ hydra-queue-runner: Write directly to a binary cache
• [19] UYUVQWXQ Fix hydra-queue-runner --build-one
• [20] UNVMKJV5 Unify build and step status codes
• [21] B2L4T3X6 Sync with Nix
• [22] MHVIT4JY Split hydra-queue-runner.cc more
• [23] LVQXQIYA Kill active build steps when builds are cancelled
• [24] 7LWB2J2Z Periodically clear orphaned build steps
• [25] OBOTGFG6 Prevent orphaned build steps
• [26] IK2UBDAU Revive jobset scheduling
• [*] YTAYNN7V Queue monitor: Bail out earlier if a step has failed previously
• [*] EYR3EW6J Keep stats for the Hydra auto scaler

Change contents

• replacement in src/hydra-queue-runner/builder.cc at line 151
  [5.3421]→[5.4871:4942](∅→∅)
  − bool quit = buildId == buildOne && step->drvPath == *buildDrvPath;
  [5.3421]

  [5.3460]
  + if (!buildOneDone)

  + buildOneDone = buildId == buildOne && step->drvPath == *buildDrvPath;
• replacement in src/hydra-queue-runner/builder.cc at line 269
  [5.316]→[5.5713:5744](∅→∅),[5.5713]→[5.5713:5744](∅→∅)
  − if (quit) exit(1);
  [5.316]

  [5.269]
  + if (buildOneDone) exit(1);
• replacement in src/hydra-queue-runner/builder.cc at line 380
  [3.11]→[3.11:88](∅→∅)
  − failStep(*conn, step, buildId, result, machine, stepFinished, quit);
  [3.11]

  [5.303]
  + failStep(*conn, step, buildId, result, machine, stepFinished);
• replacement in src/hydra-queue-runner/builder.cc at line 390
  [5.9446]→[4.450:520](∅→∅)
  − if (quit) exit(0); // testing hack; FIXME: this won't run plugins
  [5.9446]

  [5.9489]
  + if (buildOneDone) exit(0); // testing hack; FIXME: this won't run plugins
• replacement in src/hydra-queue-runner/builder.cc at line 402
  [3.685]→[3.685:727](∅→∅)
  − bool & stepFinished,

  − bool & quit)
  [3.685]

  [3.727]
  + bool & stepFinished)
• replacement in src/hydra-queue-runner/builder.cc at line 484
  [4.4154]→[4.4154:4202](∅→∅)
  − if (buildOne == b->id) quit = true;
  [4.4154]

  [4.4202]
  + if (!buildOneDone && buildOne == b->id) buildOneDone = true;
• edit in src/hydra-queue-runner/dispatcher.cc at line 377
  [4.6146]→[4.6146:6177](∅→∅)
  − bool quit = false;
• replacement in src/hydra-queue-runner/dispatcher.cc at line 387
  [4.6527]→[4.6527:6573](∅→∅)
  − nullptr, stepFinished, quit);
  [4.6527]

  [4.6573]
  + nullptr, stepFinished);
• replacement in src/hydra-queue-runner/dispatcher.cc at line 389
  [4.6574]→[4.6574:6605](∅→∅)
  − if (quit) exit(1);
  [4.6574]

  [4.6605]
  + if (buildOneDone) exit(1);
• replacement in src/hydra-queue-runner/queue-monitor.cc at line 38
  [5.20801]→[5.20801:20820](∅→∅)
  − while (true) {
  [5.20801]

  [2.0]
  + bool quit = false;

  + while (!quit) {
• edit in src/hydra-queue-runner/queue-monitor.cc at line 44
  [5.20873]

  [5.20873]
  + if (buildOne && buildOneDone) quit = true;

  +
• replacement in src/hydra-queue-runner/queue-monitor.cc at line 48
  [5.20964]→[5.65:85](∅→∅)
  − if (done) {
  [5.20964]

  [5.85]
  + if (done && !quit) {
• edit in src/hydra-queue-runner/queue-monitor.cc at line 71
  [5.21508]

  [5.21508]
  +

  + exit(0);
• edit in src/hydra-queue-runner/queue-monitor.cc at line 168
  [28.514]

  [5.7406]
  + if (!buildOneDone && build->id == buildOne) buildOneDone = true;
• edit in src/hydra-queue-runner/queue-monitor.cc at line 240
  [5.25051]

  [5.7391]
  + if (!buildOneDone && build->id == buildOne) buildOneDone = true;
• edit in src/hydra-queue-runner/queue-monitor.cc at line 299
  [5.28622]

  [5.28622]
  + if (buildOne && newRunnable.size() == 0) buildOneDone = true;

  +
• edit in src/hydra-queue-runner/state.hh at line 370
  [5.6777]

  [29.2499]
  + bool buildOneDone = false;
• replacement in src/hydra-queue-runner/state.hh at line 489
  [4.7478]→[4.7478:7529](∅→∅)
  − bool & stepFinished,

  − bool & quit);
  [4.7478]

  [4.7529]
  + bool & stepFinished);