* nix-instantiate: return exit status 100 to denote a permanent build

failure.  The build hook can use this to distinguish between
  transient and permanent failures on the remote side.
This commit is contained in:
Eelco Dolstra 2010-12-13 16:53:23 +00:00
parent 5833243c92
commit d787285af9
5 changed files with 29 additions and 14 deletions

View file

@ -240,13 +240,13 @@ my $buildFlags = "--max-silent-time $maxSilentTime --fallback --add-root $rootsD
# work on some platforms when connection sharing is used.)
pipe STDIN, DUMMY; # make sure we have a readable STDIN
if (system("ssh $hostName @sshOpts '(read; kill -INT -\$\$) <&0 & nix-store -r $drvPath $buildFlags > /dev/null' 2>&4") != 0) {
# If we couldn't run ssh or there was an ssh problem (indicated by
# exit code 255), then we return exit code 1; otherwise we assume
# that the builder failed, which we indicate to Nix using exit
# code 100. It's important to distinguish between the two because
# the first is a transient failure and the latter is permanent.
my $res = $? == -1 || ($? >> 8) == 255 ? 1 : 100;
print STDERR "build of `$drvPath' on `$hostName' failed with exit code $?\n";
# Note that if we get exit code 100 from `nix-store -r', it
# denotes a permanent build failure (as opposed to an SSH problem
# or a temporary Nix problem). We propagate this to the caller to
# allow it to distinguish between transient and permanent
# failures.
my $res = $? >> 8;
print STDERR "build of `$drvPath' on `$hostName' failed with exit code $res\n";
removeRoots;
exit $res;
}

View file

@ -393,7 +393,7 @@ int main(int argc, char * * argv)
printMsg(lvlError, format("error: %1%%2%") % (showTrace ? e.prefix() : "") % e.msg());
if (e.prefix() != "" && !showTrace)
printMsg(lvlError, "(use `--show-trace' to show detailed location information)");
return 1;
return e.status;
} catch (std::exception & e) {
printMsg(lvlError, format("error: %1%") % e.what());
return 1;

View file

@ -214,6 +214,10 @@ public:
bool cacheFailure;
/* Set if at least one derivation had a BuildError (i.e. permanent
failure). */
bool permanentFailure;
LocalStore & store;
boost::shared_ptr<HookInstance> hook;
@ -266,7 +270,8 @@ public:
/* Wait for input to become available. */
void waitForInput();
unsigned int exitStatus();
};
@ -1185,6 +1190,7 @@ void DerivationGoal::tryToBuild()
if (printBuildTrace)
printMsg(lvlError, format("@ build-failed %1% %2% %3% %4%")
% drvPath % drv.outputs["out"].path % 0 % e.msg());
worker.permanentFailure = true;
amDone(ecFailed);
return;
}
@ -1321,6 +1327,7 @@ void DerivationGoal::buildDone()
foreach (DerivationOutputs::iterator, i, drv.outputs)
worker.store.registerFailedPath(i->second.path);
worker.permanentFailure = !hookError && !fixedOutput;
amDone(ecFailed);
return;
}
@ -2444,6 +2451,7 @@ Worker::Worker(LocalStore & store)
nrLocalBuilds = 0;
lastWokenUp = 0;
cacheFailure = queryBoolSetting("build-cache-failure", false);
permanentFailure = false;
}
@ -2770,6 +2778,11 @@ void Worker::waitForInput()
}
unsigned int Worker::exitStatus()
{
return permanentFailure ? 100 : 1;
}
//////////////////////////////////////////////////////////////////////
@ -2796,7 +2809,7 @@ void LocalStore::buildDerivations(const PathSet & drvPaths)
}
if (!failed.empty())
throw Error(format("build of %1% failed") % showPaths(failed));
throw Error(format("build of %1% failed") % showPaths(failed), worker.exitStatus());
}
@ -2812,7 +2825,7 @@ void LocalStore::ensurePath(const Path & path)
worker.run(goals);
if (goal->getExitCode() != Goal::ecSuccess)
throw Error(format("path `%1%' does not exist and cannot be created") % path);
throw Error(format("path `%1%' does not exist and cannot be created") % path, worker.exitStatus());
}

View file

@ -29,7 +29,8 @@ protected:
string prefix_; // used for location traces etc.
string err;
public:
BaseError(const format & f);
unsigned int status; // exit status
BaseError(const format & f, unsigned int status = 1);
~BaseError() throw () { };
const char * what() const throw () { return err.c_str(); }
const string & msg() const throw () { return err; }
@ -41,7 +42,7 @@ public:
class newClass : public superClass \
{ \
public: \
newClass(const format & f) : superClass(f) { }; \
newClass(const format & f, unsigned int status = 1) : superClass(f, status) { }; \
};
MakeError(Error, BaseError)

View file

@ -20,7 +20,8 @@ extern char * * environ;
namespace nix {
BaseError::BaseError(const format & f)
BaseError::BaseError(const format & f, unsigned int status)
: status(status)
{
err = f.str();
}