Apagar Versões Antigas de Programas no Gentoo

No fórum do Gentoo foi postado um script para deletar os arquivos antigos em /usr/portage/distfiles. Segue o código:

#!/usr/bin/perl -w use strict; my $lastname = 0; my $lastversion; my $lastext; my @stalefiles; my @files; # Insert your exclusions here with trailing '-' my %maskedfiles = ( 'X420src-' => 1, 'gcc-' => 1, 'freetype-' => 1 ); # Root check if ($< != 0) { print "You must be root to run this script.\n"; exit 0; } # Determine sources present on the system print "Determining available tarballs in /usr/portage/distfiles ...\n"; opendir(DIR, "/usr/portage/distfiles"); @files = sort(readdir(DIR)); closedir(DIR); # Grab names/versions, checking each time whether current distfile # has been superceded. Push anonymous array ref containing required # info into @stalefiles array. print "Determining stale versions ...\n"; foreach (@files) { my $name; my $version; # Only operate on tarballs if (/(.+?\-)([0-9r\.\-]+)(\.tar\.gz|\.tgz|\.tar.bz2)/s) { $name = $1; $version = $2; next if ($maskedfiles{$name}); # Ignore "masked" files if ($lastname && $name eq $lastname) { if ($version gt $lastversion) { push (@stalefiles, [$name, $version, $lastversion, $lastext]); } } $lastname = $name; $lastversion = $version; $lastext = $3; } } if (@stalefiles == 0) { print "\nNo stale distfiles have been detected on your system!\n"; exit 0; } if ($ARGV[0] && $ARGV[0] eq '--nopretend') { # User requested deletion so here goes ... print "*Nopretend* mode, deleting stale files:\n\n"; foreach (@stalefiles) { my ($name, $version, $lastversion, $ext) = @{$_}; unlink('/usr/portage/distfiles/' . $name . $lastversion . $ext); print "Deleted: $name$lastversion in favour of $name$version\n"; } } else { # Safe mode (default)! print "\7*Pretend* mode, will only pretend to delete files.\nTo actually delete the files, reinvoke with the --nopretend parameter.\n\n"; foreach (@stalefiles) { my ($name, $version, $lastversion, $ext) = @{$_}; print "Would delete: $name$lastversion in favour of $name$version\n"; } } 1;

Executando o script sem parâmetros, ele apenas listará os arquivos a serem deletados. Para apagá-los, deve-se executar o script com a opção --nopretend


referência: http://www.gentoobr.org/2003/12/07/apagar-verses-velhas-de-programas/