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Hack to get SSH error messages from build-remote

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E.g.

  cannot build on 'ssh://mac1': cannot connect to 'mac1': bash: nix-store: command not found
  cannot build on 'ssh://mac2': cannot connect to 'mac2': Host key verification failed.
  cannot build on 'ssh://mac3': cannot connect to 'mac3': Received disconnect from 213... port 6001:2: Too many authentication failures
  Authentication failed.
This commit is contained in:
Eelco Dolstra 2018-03-20 15:17:59 +01:00
parent 78d0c72b52
commit 1aca195e52
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GPG key ID: 8170B4726D7198DE
4 changed files with 33 additions and 7 deletions
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5
src/libstore/build.cc
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@ -652,6 +652,11 @@ HookInstance::HookInstance()
if (dup2(builderOut.writeSide.get(), 4) == -1)
throw SysError("dupping builder's stdout/stderr");
/* Hack: pass the read side of that fd to allow build-remote
to read SSH error messages. */
if (dup2(builderOut.readSide.get(), 5) == -1)
throw SysError("dupping builder's stdout/stderr");
Strings args = {
baseNameOf(settings.buildHook),
std::to_string(verbosity),