Support preferLocalBuild

Dependencies

• [2] SODOV2CM Automatically reload $NIX_REMOTE_SYSTEMS when it changes
• [3] HLSHCK3C Support requiredSystemFeatures
• [4] 5AIYUMTB Basic remote building
• [5] N5O7VEEO Immediately abort builds that require an unsupported system type
• [*] 24BMQDZA Start of single-process hydra-queue-runner
• [*] NJJ7H64S Very basic multi-threaded queue runner

Change contents

• edit in src/hydra-queue-runner/hydra-queue-runner.cc at line 141
  [3.50]

  [7.5820]
  + bool preferLocalBuild;
• replacement in src/hydra-queue-runner/hydra-queue-runner.cc at line 198
  [3.94]→[3.94:200](∅→∅)
  − if (step->requiredSystemFeatures.find(f) == step->requiredSystemFeatures.end()) return false;
  [3.94]

  [3.200]
  + if (step->requiredSystemFeatures.find(f) == step->requiredSystemFeatures.end()

  + && !(step->preferLocalBuild && f == "local"))

  + return false;
• edit in src/hydra-queue-runner/hydra-queue-runner.cc at line 213
  [3.6816]

  [8.947]
  +

  + StringSet localPlatforms;
• edit in src/hydra-queue-runner/hydra-queue-runner.cc at line 369
  [2.825]

  [7.7503]
  +

  + localPlatforms = {settings.thisSystem};

  + if (settings.thisSystem == "x86_64-linux")

  + localPlatforms.insert("i686-linux");
• replacement in src/hydra-queue-runner/hydra-queue-runner.cc at line 389
  [2.1289]→[2.1289:1509](∅→∅)
  − StringSet systems = StringSet({settings.thisSystem});

  − if (settings.thisSystem == "x86_64-linux")

  − systems.insert("i686-linux");

  − contents = "localhost " + concatStringsSep(",", systems)
  [2.1289]

  [2.1509]
  + contents = "localhost " + concatStringsSep(",", localPlatforms)
• edit in src/hydra-queue-runner/hydra-queue-runner.cc at line 414
  [2.2297]

  [2.2297]
  + if (tokens[5] == "-") tokens[5] = "";
• edit in src/hydra-queue-runner/hydra-queue-runner.cc at line 416
  [2.2377]

  [2.2377]
  + if (tokens[6] == "-") tokens[6] = "";
• edit in src/hydra-queue-runner/hydra-queue-runner.cc at line 831
  [7.11833]

  [7.11833]
  + auto attr = step->drv.env.find("preferLocalBuild");

  + step->preferLocalBuild =

  + attr != step->drv.env.end() && attr->second == "1"

  + && has(localPlatforms, step->drv.platform);

  +