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# $Id: colordiff.pl,v 1.4.2.10 2004/01/04 15:02:59 daveewart Exp $
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########################################################################
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# ColorDiff - a wrapper/replacment for 'diff' producing #
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# Copyright (C)2002-2004 Dave Ewart (davee@sungate.co.uk) #
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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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# 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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# 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., 675 Mass Ave, Cambridge, MA 02139, USA. #
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########################################################################
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use Getopt::Long qw(:config pass_through);
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my $app_name = 'colordiff';
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my $version = '1.0.4';
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my $author = 'Dave Ewart';
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my $author_email = 'davee@sungate.co.uk';
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my $app_www = 'http://colordiff.sourceforge.net/';
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my $copyright = '(C)2002-2004';
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# ANSI sequences for colours
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$colour{white} = "\033[1;37m";
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$colour{yellow} = "\033[1;33m";
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$colour{green} = "\033[1;32m";
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$colour{blue} = "\033[1;34m";
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$colour{cyan} = "\033[1;36m";
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$colour{red} = "\033[1;31m";
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$colour{magenta} = "\033[1;35m";
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$colour{black} = "\033[1;30m";
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$colour{darkwhite} = "\033[0;37m";
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$colour{darkyellow} = "\033[0;33m";
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$colour{darkgreen} = "\033[0;32m";
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$colour{darkblue} = "\033[0;34m";
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$colour{darkcyan} = "\033[0;36m";
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$colour{darkred} = "\033[0;31m";
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$colour{darkmagenta} = "\033[0;35m";
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$colour{darkblack} = "\033[0;30m";
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$colour{OFF} = "\033[0;0m";
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# Default colours if /etc/colordiffrc or ~/.colordiffrc do not exist
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my $plain_text = $colour{OFF};
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my $file_old = $colour{red};
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my $file_new = $colour{blue};
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my $diff_stuff = $colour{magenta};
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# Locations for personal and system-wide colour configurations
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my $HOME = $ENV{HOME};
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my ($setting, $value);
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my @config_files = ("$etcdir/colordiffrc", "$HOME/.colordiffrc");
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foreach $config_file (@config_files) {
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if (open(COLORDIFFRC, "<$config_file")) {
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while (<COLORDIFFRC>) {
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next if (/^#/ || /^$/);
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($setting, $value) = split ('=');
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if ($setting eq 'banner') {
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if (!defined $colour{$value}) {
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print "Invalid colour specification ($value) in $config_file\n";
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if ($setting eq 'plain') {
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$plain_text = $colour{$value};
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elsif ($setting eq 'oldtext') {
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$file_old = $colour{$value};
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elsif ($setting eq 'newtext') {
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$file_new = $colour{$value};
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elsif ($setting eq 'diffstuff') {
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$diff_stuff = $colour{$value};
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print "Unknown option in $etcdir/colordiffrc: $setting\n";
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# colordiff specific options here. Need to pre-declare if using variables
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"no-banner" => sub { $show_banner = 0 },
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"plain-text=s" => \&set_color,
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"file-old=s" => \&set_color,
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"file-new=s" => \&set_color,
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"diff-stuff=s" => \&set_color
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if ($show_banner == 1) {
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print STDERR "$app_name $version ($app_www)\n";
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print STDERR "$copyright $author, $author_email\n\n";
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if (defined $ARGV[0]) {
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# More reliable way of pulling in arguments
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open2(\*INPUTSTREAM, undef, "git", "diff", @ARGV);
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*INPUTSTREAM = \*STDIN;
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my $inside_file_old = 1;
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my $nparents = undef;
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while (<INPUTSTREAM>) {
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if (/^(\@\@+) -[-+0-9, ]+ \1/) {
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$nparents = length($1) - 1;
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elsif (/^diff -/ || /^index / ||
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/^old mode / || /^new mode / ||
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/^deleted file mode / || /^new file mode / ||
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/^similarity index / || /^dissimilarity index / ||
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/^copy from / || /^copy to / ||
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/^rename from / || /^rename to /) {
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elsif (defined $nparents) {
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if ($nparents == 1) {
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elsif (/^ {$nparents}/) {
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elsif (/^[+ ]{$nparents}/) {
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elsif (/^[- ]{$nparents}/) {
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elsif (/^--- / || /^\+\+\+ /) {
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my ($type, $color) = @_;
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eval "\$$type = \$colour{$color}";