Set propagatedFrom for cached failed build steps

Dependencies

• [2] 4CQWOODY Don't abort steps that have an unsupported system type
• [3] MHVIT4JY Split hydra-queue-runner.cc more

Change contents

• replacement in src/hydra-queue-runner/queue-monitor.cc at line 172
  [3.26572]→[2.142:212](∅→∅)
  − createBuildStep(txn, 0, build, r, "", bssFailed);
  [3.26572]

  [3.26648]
  +

  + /* Find the previous build step record, first by

  + derivation path, then by output path. */

  + BuildID propagatedFrom = 0;

  +

  + auto res = txn.parameterized

  + ("select max(build) from BuildSteps where drvPath = $1 and startTime != 0 and stopTime != 0 and status = 1")

  + (r->drvPath).exec();

  + if (!res[0][0].is_null()) propagatedFrom = res[0][0].as<BuildID>();

  +

  + if (!propagatedFrom) {

  + for (auto & output : r->drv.outputs) {

  + auto res = txn.parameterized

  + ("select max(s.build) from BuildSteps s join BuildStepOutputs o on s.build = o.build where path = $1 and startTime != 0 and stopTime != 0 and status = 1")

  + (output.second.path).exec();

  + if (!res[0][0].is_null()) {

  + propagatedFrom = res[0][0].as<BuildID>();

  + break;

  + }

  + }

  + }

  +

  + createBuildStep(txn, 0, build, r, "", bssCachedFailure, "", propagatedFrom);