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package urpm::util;
# $Id$
use strict;
use Exporter;
our @ISA = 'Exporter';
our @EXPORT = qw(min max quotespace unquotespace
remove_internal_name
reduce_pathname offset_pathname
untaint
copy_and_own
same_size_and_mtime
partition put_in_hash uniq uniq_
begins_with
difference2 intersection member
file_size cat_ cat_utf8 wc_l
output_safe append_to_file dirname basename
file2absolute_file
);
(our $VERSION) = q($Revision$) =~ /(\d+)/;
sub min { my $n = shift; $_ < $n and $n = $_ foreach @_; $n }
sub max { my $n = shift; $_ > $n and $n = $_ foreach @_; $n }
#- quoting/unquoting a string that may be containing space chars.
sub quotespace { my $x = $_[0] || ''; $x =~ s/(\s)/\\$1/g; $x }
sub unquotespace { my $x = $_[0] || ''; $x =~ s/\\(\s)/$1/g; $x }
sub remove_internal_name { my $x = $_[0] || ''; $x =~ s/\(\S+\)$/$1/g; $x }
sub dirname { local $_ = shift; s|[^/]*/*\s*$||; s|(.)/*$|$1|; $_ || '.' }
sub basename { local $_ = shift; s|/*\s*$||; s|.*/||; $_ }
sub file2absolute_file {
my ($f) = @_;
if ($f !~ m!^/!) {
require File::Spec;
$f = File::Spec->rel2abs($f);
}
$f;
}
#- reduce pathname by removing <something>/.. each time it appears (or . too).
sub reduce_pathname {
my ($url) = @_;
#- clean url to remove any macro (which cannot be solved now).
#- take care if this is a true url and not a simple pathname.
my ($host, $dir) = $url =~ m|([^:/]*://[^/]*/)?(.*)|;
$host = '' if !defined $host;
#- remove any multiple /s or trailing /.
#- then split all components of pathname.
$dir =~ s|/+|/|g; $dir =~ s|/$||;
my @paths = split '/', $dir;
#- reset $dir, recompose it, and clean trailing / added by algorithm.
$dir = '';
foreach (@paths) {
if ($_ eq '..') {
if ($dir =~ s|([^/]+)/$||) {
if ($1 eq '..') {
$dir .= "../../";
}
} else {
$dir .= "../";
}
} elsif ($_ ne '.') {
$dir .= "$_/";
}
}
$dir =~ s|/$||;
$dir ||= '/';
$host . $dir;
}
#- offset pathname by returning the right things to add to a relative directory
#- to make no change. url is needed to resolve going before to top base.
sub offset_pathname {
my ($url, $offset) = map { reduce_pathname($_) } @_;
#- clean url to remove any macro (which cannot be solved now).
#- take care if this is a true url and not a simple pathname.
my (undef, $dir) = $url =~ m|([^:/]*://[^/]*/)?(.*)|;
my @paths = split '/', $dir;
my @offpaths = reverse split '/', $offset;
my @corrections;
my $result = '';
foreach (@offpaths) {
if ($_ eq '..') {
push @corrections, pop @paths;
} else {
$result .= '../';
}
}
$result . join('/', reverse @corrections);
}
sub untaint {
my @r = map { /(.*)/ } @_;
@r == 1 ? $r[0] : @r;
}
sub copy {
my ($file, $dest) = @_;
!system("/bin/cp", "-p", "-L", "-R", $file, $dest);
}
sub copy_and_own {
my ($file, $dest_file) = @_;
copy($file, $dest_file) && chown(0, 0, $dest_file) == 1;
}
sub move {
my ($file, $dest) = @_;
rename($file, $dest) || !system("/bin/mv", "-f", $file, $dest);
}
#- file_size is useful to write file_size(...) > 32 without having warnings if file doesn't exist
sub file_size {
my ($file) = @_;
-s $file || 0;
}
sub same_size_and_mtime {
my ($f1, $f2) = @_;
my @sstat = stat $f1;
my @lstat = stat $f2;
$sstat[7] == $lstat[7] && $sstat[9] == $lstat[9];
}
sub partition(&@) {
my $f = shift;
my (@a, @b);
foreach (@_) {
$f->($_) ? push(@a, $_) : push(@b, $_);
}
\@a, \@b;
}
sub begins_with {
my ($s, $prefix) = @_;
index($s, $prefix) == 0;
}
sub put_in_hash { my ($a, $b) = @_; while (my ($k, $v) = each %{$b || {}}) { $a->{$k} = $v } $a }
sub uniq { my %l; $l{$_} = 1 foreach @_; grep { delete $l{$_} } @_ }
sub difference2 { my %l; @l{@{$_[1]}} = (); grep { !exists $l{$_} } @{$_[0]} }
sub intersection { my (%l, @m); @l{@{shift @_}} = (); foreach (@_) { @m = grep { exists $l{$_} } @$_; %l = (); @l{@m} = () } keys %l }
sub member { my $e = shift; foreach (@_) { $e eq $_ and return 1 } 0 }
sub cat_ { my @l = map { my $F; open($F, '<', $_) ? <$F> : () } @_; wantarray() ? @l : join '', @l }
sub cat_utf8 { my @l = map { my $F; open($F, '<:utf8', $_) ? <$F> : () } @_; wantarray() ? @l : join '', @l }
sub wc_l { my $F; open($F, '<', $_[0]) or return; my $count = 0; while (<$F>) { $count++ } $count }
sub uniq_(&@) {
my $f = shift;
my %l;
$l{$f->($_)} = 1 foreach @_;
grep { delete $l{$f->($_)} } @_;
}
sub output_safe {
my ($file, $content, $o_backup_ext) = @_;
open(my $f, '>', "$file.new") or return;
print $f $content or return;
close $f or return;
rename($file, "$file$o_backup_ext") or return if $o_backup_ext;
rename("$file.new", $file) or return;
1;
}
sub append_to_file {
my $f = shift;
open(my $F, '>>', $f) or die "writing to file $f failed: $!\n";
print $F $_ foreach @_;
1;
}
1;
__END__
=head1 NAME
urpm::util - Misc. utilities subs for urpmi
=head1 SYNOPSIS
=head1 DESCRIPTION
=head1 COPYRIGHT
Copyright (C) 2005 MandrakeSoft SA
Copyright (C) 2005, 2006 Mandriva SA
=cut
|
