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

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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
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14
scripts/build-remote.pl.in
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@ -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;
}