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difftool: exit(0) when usage is printed

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Prior to this commit, the script exited with an error whenever the
usage string was printed, regardless of the reason it was done. In
cases where usage was printed due to a user request (e.g. '-h'
option), the script should exit without error (exit 0).

This commit adds an argument to the usage function that allows the
exit code to be specified when the function is called.

Signed-off-by: Tim Henigan <tim.henigan@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Tim Henigan 2012-03-22 15:52:18 -04:00 committed by Junio C Hamano
parent 850896042a
commit 283607694c
1 changed files with 5 additions and 4 deletions
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9
git-difftool.perl
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@ -20,6 +20,7 @@
sub usage
{
my $exitcode = shift;
print << 'USAGE';
usage: git difftool [-t|--tool=<tool>]
[-x|--extcmd=<cmd>]
@ -27,7 +28,7 @@ sub usage
[--prompt] [-y|--no-prompt]
['git diff' options]
USAGE
exit 1;
exit($exitcode);
}
sub setup_environment
@ -58,14 +59,14 @@ sub exe
'x|extcmd:s' => \$extcmd);
if (defined($help)) {
usage();
usage(0);
}
if (defined($difftool_cmd)) {
if (length($difftool_cmd) > 0) {
$ENV{GIT_DIFF_TOOL} = $difftool_cmd;
} else {
print "No <tool> given for --tool=<tool>\n";
usage();
usage(1);
}
}
if (defined($extcmd)) {
@ -73,7 +74,7 @@ sub exe
$ENV{GIT_DIFFTOOL_EXTCMD} = $extcmd;
} else {
print "No <cmd> given for --extcmd=<cmd>\n";
usage();
usage(1);
}
}
if ($gui) {