mirror-branch: Always exit with 1 on nix-instantiate error #31
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mirror-nixos-branch.pl
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| @@ -81,8 +81,9 @@ sub fetch { | |||
| exit 127; | |||
| } | |||
| if ($? > 0) { | |||
| warn("error while executing nix-instantiate ($?).\n"); | |||
| exit $?; | |||
| my $code = $? >> 8; | |||
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Looks like it's a little bit more complicated - we'll need ($? & 127) ? 127 : ($? >> 8) (parens because I don't remember operator precedence). Processes that are killed via signal leave their signal number in $? & 127, but scripts that exit leave the return code in $? >> 8 - so my suggestion is to use a synthetic 127 exit code for signal-related exits, and propagate the error code otherwise.
At this point, I think I'd suggest just simplifying this block entirely:
$! = 0; # Clear errno to avoid reporting non-fork/exec-related issues
my $d = `NIX_PATH= nix-instantiate --eval -E "builtins.compareVersions (builtins.parseDrvName \\"$curRelease\\").version (builtins.parseDrvName \\"$releaseName\\").version"`;
if ($? != 0) {
warn "Could not execute nix-instantiate: exit $?; errno $!\n";
exit 127;
}
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+1 on making the exit code static, though probably 1 is better than 127, since 127 feels very specific and somebody seeing exit 1 may correctly assume less thought went in to the code.
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Updated (including with @grahamc's comment).
samueldr
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Resolving the values and being fancy is harder than the actual benefits would give out. Return all the info we have, and let the pager'd person deal with the data.
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Resolving the values and being fancy is harder than the actual benefits
would give out.
Return all the info we have, and let the pager'd person deal with the
data.