122 lines
2.7 KiB
Plaintext
122 lines
2.7 KiB
Plaintext
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#!/usr/bin/perl
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# Copyright 2011 Ben Hutchings
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#
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation; either version 2 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program; if not, write to the Free Software
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# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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use strict;
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use warnings;
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use DebianLinux qw(version_cmp image_list);
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sub usage {
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my $fh = shift;
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print $fh (<< "EOT");
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Usage: $0 compare VERSION1 OP VERSION2
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$0 sort [--reverse] [VERSION1 VERSION2 ...]
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$0 list [--paths]
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The version arguments should be kernel version strings as shown by
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'uname -r' and used in filenames.
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The valid comparison operators are: lt le eq ge gt
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EOT
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}
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sub usage_error {
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usage(*STDERR{IO});
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exit 2;
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}
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sub compare_versions {
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my %op_map = qw(lt < le <= eq == ge >= gt >);
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# Check arguments
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if (@_ != 3) {
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usage_error();
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}
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my ($left, $op, $right) = @_;
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if (!exists($op_map{$op})) {
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usage_error();
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}
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my $sign = version_cmp($left, $right);
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exit !eval("$sign ${op_map{$op}} 0");
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}
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sub sort_versions {
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# Check for --reverse option
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my $sign = 1;
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if (@_ >= 1 and $_[0] eq '--reverse') {
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$sign = -1;
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shift;
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}
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# Collect versions from argv or stdin (with optional suffix after a space)
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my @versions;
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if (@_) {
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@versions = map({[$_, "\n"]} @_);
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} else {
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while (<STDIN>) {
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/^([^ \n]*)(.*\n?)$/ or die;
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push @versions, [$1, $2];
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}
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}
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for (sort({version_cmp($a->[0], $b->[0]) * $sign} @versions)) {
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print @$_;
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}
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exit 0;
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}
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sub list_versions {
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my $show_paths;
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if (@_ == 1 and $_[0] eq '--paths') {
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$show_paths = 1;
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} elsif (@_ != 0) {
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usage_error();
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}
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my $sig = '.sig';
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for (image_list()) {
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my ($version, $path) = @$_;
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unless ($path =~ /\Q$sig\E$/) {
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if ($show_paths) {
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print "$version $path\n";
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} else {
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print "$version\n";
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}
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}
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}
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exit 0;
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}
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if (@ARGV == 0) {
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usage_error();
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}
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my $command = shift;
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if ($command eq 'help' or grep({$_ eq '--help'} $command, @ARGV)) {
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usage(*STDOUT{IO});
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exit 0;
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} elsif ($command eq 'compare') {
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compare_versions(@ARGV);
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} elsif ($command eq 'sort') {
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sort_versions(@ARGV);
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} elsif ($command eq 'list') {
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list_versions(@ARGV);
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}
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usage_error();
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