Git.pm: Handle failed commands' output

diff --git a/git-annotate.perl b/git-annotate.perl
index 9df72a1662c47790a7d97309e40dc1051e5f7fcc..a6a7a482cdcf34e3a1d545c7d5deab599a7c0d2f 100755 (executable)
--- a/git-annotate.perl
+++ b/git-annotate.perl
@@ -10,9 +10,10 @@
 use strict;
 use Getopt::Long;
 use POSIX qw(strftime gmtime);
+use File::Basename qw(basename dirname);
 
 sub usage() {
-       print STDERR 'Usage: ${\basename $0} [-s] [-S revs-file] file [ revision ]
+       print STDERR "Usage: ${\basename $0} [-s] [-S revs-file] file [ revision ]
        -l, --long
                        Show long rev (Defaults off)
        -t, --time
@@ -23,7 +24,7 @@ ()
                        Use revs from revs-file instead of calling git-rev-list
        -h, --help
                        This message.
-';
+";
 
        exit(1);
 }
@@ -35,7 +36,7 @@ ()
                        "help|h" => \$help,
                        "rename|r" => \$rename,
                        "rev-file|S=s" => \$rev_file);
-if (!$rc or $help) {
+if (!$rc or $help or !@ARGV) {
        usage();
 }
 
@@ -208,6 +209,9 @@ sub find_parent_renames {
        while (my $change = <$patch>) {
                chomp $change;
                my $filename = <$patch>;
+               if (!defined $filename) {
+                       next;
+               }
                chomp $filename;
 
                if ($change =~ m/^[AMD]$/ ) {