add fixdiff.pl to convert svn diff from other architectures

git-svn-id: http://svn.osgeo.org/qgis/trunk/qgis@8395 c8812cc2-4d05-0410-92ff-de0c093fc19c

scripts/fixdiff.pl

@@ -0,0 +1,54 @@
+#!/usr/bin/perl 
+
+# NAME
+#   fixdiff.pl - fix line endings in svn diff to match lineending of existing files
+# SYNOPSIS
+#   perl fixdiff.pl a.diff | patch -p0 ...
+# DESCRIPTION:
+#   parse diff and modify the hunks to match the line ending of the target files
+#   This is useful, when the compared trees to generate the diff are on a
+#   different architecture than that of the one where the patch is to be
+#   applied.
+# LICENSE:
+#   Copyright 2008 Jürgen E. Fischer <jef@norbit.de>
+#   GPL2
+
+use strict;
+use warnings;
+
+my $dos;
+
+while(<>) {
+   if( /^Index: (.*)\n/ ) {
+      my $file=$1;
+      $dos=0;
+
+      if(-f $file) {
+        open F, $file;
+        binmode(F);
+        $dos=1 if scalar(<F>) =~ /\r\n$/;
+        close F;
+
+        #warn "$file in DOS mode!" if $dos;
+      } else {
+          warn "$file not found.";
+      }
+   } elsif(/^$/) {
+      # skip empty lines
+      next;
+   } elsif(/^===================================================================/ ||
+           /^---/ ||
+           /^\+\+\+/ ||
+           /^@@/) {
+      print;
+   } elsif($dos && !/\r\n$/) {
+      chop;
+      print "$_\r\n";
+   } elsif(!$dos && /\r\n$/) {
+      chop;
+      chop;
+      print "$_\n";
+   } else {
+      print;
+   }
+}