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#!/usr/bin/perl
use Archive::Cpio;
use Getopt::Long;
=head1 NAME
cpio-filter - transform a cpio archive
=head1 SYNOPSIS
cpio-filter [--exclude <PATTERN>] [--in-place] [<cpio file>]
=head1 DESCRIPTION
Transform a cpio archive on the fly. Reads on stdin and output on stderr
=head1 AUTHOR
Pascal Rigaux <[email protected]>
=cut
my %options = (
'exclude=s' => \ (my $exclude),
'in-place|i' => \ (my $in_place),
);
sub usage {
die "usage: cpio-filter [--exclude <PATTERN>] [--in-place] [<cpio file>]\n";
}
GetOptions(%options) or usage();
@ARGV <= 1 or usage();
if ($in_place) {
@ARGV or die "you can't use --in-place without giving a cpio file\n";
}
my ($file) = @ARGV;
sub exclude {
my ($e) = @_;
$exclude && $e->name =~ m!(^|/)${exclude}($|/)!;
}
my $cpio = Archive::Cpio->new;
if ($in_place) {
$cpio->read($file);
$cpio->remove(map { exclude($_) ? $_->name : () } $cpio->get_files);
$cpio->write($file);
} else {
my $IN;
if ($file) {
open($IN, '<', $file) or die "can't open $file: $!\n";
} else {
$IN = \*STDIN;
}
$cpio->read_with_handler($IN, sub {
my ($e) = @_;
$cpio->write_one(\*STDOUT, $e) if !exclude($e);
});
$cpio->write_trailer(\*STDOUT);
}