C4/Installer/UpgradeBackup.pm

   1 package C4::Installer::UpgradeBackup;
   2
   3 # Copyright (C) 2008 LibLime
   4 #
   5 # This file is part of Koha.
   6 #
   7 # Koha is free software; you can redistribute it and/or modify it
   8 # under the terms of the GNU General Public License as published by
   9 # the Free Software Foundation; either version 3 of the License, or
  10 # (at your option) any later version.
  11 #
  12 # Koha is distributed in the hope that it will be useful, but
  13 # WITHOUT ANY WARRANTY; without even the implied warranty of
  14 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  15 # GNU General Public License for more details.
  16 #
  17 # You should have received a copy of the GNU General Public License
  18 # along with Koha; if not, see <http://www.gnu.org/licenses>.
  19
  20 use Modern::Perl;
  21 use File::Compare qw(compare);
  22 use Cwd qw(cwd);
  23 use File::Copy;
  24 use File::Find;
  25 use File::Spec;
  26 use Exporter;
  27
  28 use vars qw(@ISA @EXPORT );
  29
  30 @ISA = ('Exporter');
  31 @EXPORT = ('backup_changed_files');
  32
  33 =head1 NAME
  34
  35 C4::Installer::UpgradeBackup
  36
  37 =head1 DESCRIPTION
  38
  39 This is a helper module used during a 'make upgrade' that
  40 creates backups of files updated during an upgrade.
  41
  42 =cut
  43
  44 sub backup_changed_files {
  45     my $from_to = shift;
  46     my $suffix = shift;
  47     my $verbose = shift;
  48     my $inc_uninstall = shift;
  49
  50     my $cwd = cwd();
  51     foreach my $sourceroot (sort keys %$from_to) {
  52         my $targetroot = $from_to->{$sourceroot};
  53         my $currdir = File::Spec->catdir($cwd, $sourceroot);
  54
  55         next unless -d $currdir;
  56
  57         chdir $currdir or die "could not change to $currdir: $!";
  58
  59         # expand path
  60         find(sub {
  61             return unless -f $_;
  62             my $filename = $_;
  63
  64             my $targetdir  = File::Spec->catdir($targetroot, $File::Find::dir);
  65             my $targetfile = File::Spec->catfile($targetdir, $filename);
  66             my $sourcedir  = File::Spec->catdir($currdir, $File::Find::dir);
  67             my $sourcefile = File::Spec->catfile($sourcedir, $filename);
  68
  69             if (-f $targetfile) {
  70                 my ($size) = (stat $sourcefile)[7];
  71                 my $backup = $targetfile . $suffix;
  72                 unless (-s $targetfile == $size and not compare($sourcefile, $targetfile)) {
  73                     print "Backed up $targetfile to $backup\n";
  74                     File::Copy::copy($targetfile, $backup);
  75                 }
  76             }
  77         }, ".");
  78     }
  79 }
  80
  81 =head1 AUTHOR
  82
  83 Code based on parts of ExtUtils::Install in order to
  84 approximately track how it identifies files to
  85 install.
  86
  87 Koha Development Team <http://koha-community.org/>
  88
  89 Galen Charlton <galen.charlton@liblime.com>
  90
  91 =cut
  92
  93 1;