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error messages for issue 2238

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This commit is contained in:
Ben Burdette 2020-08-05 10:58:00 -06:00
parent b3e73547a0
commit f1a47a96b6
2 changed files with 43 additions and 3 deletions
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31
src/build-remote/build-remote.cc
View file

@ -170,7 +170,38 @@ static int _main(int argc, char * * argv)
if (rightType && !canBuildLocally)
std::cerr << "# postpone\n";
else
{
// build the hint template.
string hintstring = "required (system, features): (%s, %s)";
hintstring += "\n%s available machines:";
hintstring += "\n(systems, maxjobs, supportedFeatures, mandatoryFeatures)";
for (unsigned int i = 0; i < machines.size(); ++i) {
hintstring += "\n(%s, %s, %s, %s)";
}
// add the template values.
auto hint = hintformat(hintstring);
hint
% neededSystem
% concatStringsSep<StringSet>(", ", requiredFeatures)
% machines.size();
for (auto & m : machines) {
hint % concatStringsSep<vector<string>>(", ", m.systemTypes)
% m.maxJobs
% concatStringsSep<StringSet>(", ", m.supportedFeatures)
% concatStringsSep<StringSet>(", ", m.mandatoryFeatures);
}
logError({
.name = "Remote build",
.description = "Failed to find a machine for remote build!",
.hint = hint
});
std::cerr << "# decline\n";
}
break;
}

11
src/libstore/build.cc
View file

@ -4876,8 +4876,17 @@ void Worker::run(const Goals & _topGoals)
waitForInput();
else {
if (awake.empty() && 0 == settings.maxBuildJobs)
{
if (getMachines().empty())
throw Error("unable to start any build; either increase '--max-jobs' "
"or enable remote builds");
"or enable remote builds."
"\nhttps://nixos.org/nix/manual/#chap-distributed-builds");
else
throw Error("unable to start any build; remote machines may not have "
"all required system features."
"\nhttps://nixos.org/nix/manual/#chap-distributed-builds");
}
assert(!awake.empty());
}
}