/usr/bin/vlpatch is in libvcs-lite-perl 0.09-1.
This file is owned by root:root, with mode 0o755.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 | #!/usr/bin/perl
eval 'exec /usr/bin/perl -S $0 ${1+"$@"}'
if 0; # not running under some shell
use strict;
use warnings;
use Getopt::Long;
my $output;
GetOptions(
'output=s' => \$output,
);
if (!@ARGV) {
print <<END;
Usage: vlpatch.pl [--output outfile] original patch
vlpatch [--output outfile] original # take patch from stdin
if --output is not specified, the patched file is put in place of
the original, and the original is renamed to *.orig
END
exit;
}
my $orig = shift @ARGV;
my ($pat,$patsrc) = @ARGV ? ($ARGV[0],$ARGV[0]) : (\*STDIN,'-');
my $el1 = VCS::Lite->new($orig);
my $dt1 = VCS::Lite::Delta->new($patsrc,undef,$orig,$pat);
my $chg = $el1->patch($dt1) or die "Patch failed";
if (!$output) {
rename $orig, "$orig.orig";
$output = $orig;
}
open PAT,">$output" or die "Failed to write output, $!";
print PAT $chg->text;
close PAT;
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