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-rw-r--r--src/build-remote/build-remote.cc40
1 files changed, 39 insertions, 1 deletions
diff --git a/src/build-remote/build-remote.cc b/src/build-remote/build-remote.cc
index 3579d8fff..5247cefa6 100644
--- a/src/build-remote/build-remote.cc
+++ b/src/build-remote/build-remote.cc
@@ -103,7 +103,7 @@ static int _main(int argc, char * * argv)
drvPath = store->parseStorePath(readString(source));
auto requiredFeatures = readStrings<std::set<std::string>>(source);
- auto canBuildLocally = amWilling
+ auto canBuildLocally = amWilling
&& ( neededSystem == settings.thisSystem
|| settings.extraPlatforms.get().count(neededSystem) > 0)
&& allSupportedLocally(requiredFeatures);
@@ -170,7 +170,45 @@ static int _main(int argc, char * * argv)
if (rightType && !canBuildLocally)
std::cerr << "# postpone\n";
else
+ {
+ // build the hint template.
+ string hintstring = "derivation: %s\nrequired (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.
+ string drvstr;
+ if (drvPath.has_value())
+ drvstr = drvPath->to_string();
+ else
+ drvstr = "<unknown>";
+
+ auto hint = hintformat(hintstring);
+ hint
+ % drvstr
+ % 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;
}