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Add colordiff for git to contrib/colordiff.
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I hacked it up to teach it the git extended diff headers, made
it not to read the whole patch in the array.

Also, the original program, when arguments are given, ran "diff"
with the given arguments and showed the output from it.  Of
course, I changed it to run "git diff" ;-).

Signed-off-by: Junio C Hamano <junkio@cox.net>
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Junio C Hamano committed Apr 22, 2006
1 parent e64961b commit 96afa07
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2 changes: 2 additions & 0 deletions contrib/colordiff/README
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This is "colordiff" (http://colordiff.sourceforge.net/) by Dave
Ewart <davee@sungate.co.uk>, modified specifically for git.
196 changes: 196 additions & 0 deletions contrib/colordiff/colordiff.perl
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#!/usr/bin/perl -w
#
# $Id: colordiff.pl,v 1.4.2.10 2004/01/04 15:02:59 daveewart Exp $

########################################################################
# #
# ColorDiff - a wrapper/replacment for 'diff' producing #
# colourful output #
# #
# Copyright (C)2002-2004 Dave Ewart (davee@sungate.co.uk) #
# #
########################################################################
# #
# This program is free software; you can redistribute it and/or modify #
# it under the terms of the GNU General Public License as published by #
# the Free Software Foundation; either version 2 of the License, or #
# (at your option) any later version. #
# #
# This program is distributed in the hope that it will be useful, #
# but WITHOUT ANY WARRANTY; without even the implied warranty of #
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the #
# GNU General Public License for more details. #
# #
# You should have received a copy of the GNU General Public License #
# along with this program; if not, write to the Free Software #
# Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. #
# #
########################################################################

use strict;
use Getopt::Long qw(:config pass_through);
use IPC::Open2;

my $app_name = 'colordiff';
my $version = '1.0.4';
my $author = 'Dave Ewart';
my $author_email = 'davee@sungate.co.uk';
my $app_www = 'http://colordiff.sourceforge.net/';
my $copyright = '(C)2002-2004';
my $show_banner = 1;

# ANSI sequences for colours
my %colour;
$colour{white} = "\033[1;37m";
$colour{yellow} = "\033[1;33m";
$colour{green} = "\033[1;32m";
$colour{blue} = "\033[1;34m";
$colour{cyan} = "\033[1;36m";
$colour{red} = "\033[1;31m";
$colour{magenta} = "\033[1;35m";
$colour{black} = "\033[1;30m";
$colour{darkwhite} = "\033[0;37m";
$colour{darkyellow} = "\033[0;33m";
$colour{darkgreen} = "\033[0;32m";
$colour{darkblue} = "\033[0;34m";
$colour{darkcyan} = "\033[0;36m";
$colour{darkred} = "\033[0;31m";
$colour{darkmagenta} = "\033[0;35m";
$colour{darkblack} = "\033[0;30m";
$colour{OFF} = "\033[0;0m";

# Default colours if /etc/colordiffrc or ~/.colordiffrc do not exist
my $plain_text = $colour{OFF};
my $file_old = $colour{red};
my $file_new = $colour{blue};
my $diff_stuff = $colour{magenta};

# Locations for personal and system-wide colour configurations
my $HOME = $ENV{HOME};
my $etcdir = '/etc';

my ($setting, $value);
my @config_files = ("$etcdir/colordiffrc", "$HOME/.colordiffrc");
my $config_file;

foreach $config_file (@config_files) {
if (open(COLORDIFFRC, "<$config_file")) {
while (<COLORDIFFRC>) {
chop;
next if (/^#/ || /^$/);
s/\s+//g;
($setting, $value) = split ('=');
if ($setting eq 'banner') {
if ($value eq 'no') {
$show_banner = 0;
}
next;
}
if (!defined $colour{$value}) {
print "Invalid colour specification ($value) in $config_file\n";
next;
}
if ($setting eq 'plain') {
$plain_text = $colour{$value};
}
elsif ($setting eq 'oldtext') {
$file_old = $colour{$value};
}
elsif ($setting eq 'newtext') {
$file_new = $colour{$value};
}
elsif ($setting eq 'diffstuff') {
$diff_stuff = $colour{$value};
}
else {
print "Unknown option in $etcdir/colordiffrc: $setting\n";
}
}
close COLORDIFFRC;
}
}

# colordiff specfic options here. Need to pre-declare if using variables
GetOptions(
"no-banner" => sub { $show_banner = 0 },
"plain-text=s" => \&set_color,
"file-old=s" => \&set_color,
"file-new=s" => \&set_color,
"diff-stuff=s" => \&set_color
);

if ($show_banner == 1) {
print STDERR "$app_name $version ($app_www)\n";
print STDERR "$copyright $author, $author_email\n\n";
}

if (defined $ARGV[0]) {
# More reliable way of pulling in arguments
open2(\*INPUTSTREAM, undef, "git", "diff", @ARGV);
}
else {
*INPUTSTREAM = \*STDIN;
}

my $record;
my $nrecs = 0;
my $inside_file_old = 1;
my $nparents = undef;

while (<INPUTSTREAM>) {
$nrecs++;
if (/^(\@\@+) -[-+0-9, ]+ \1/) {
print "$diff_stuff";
$nparents = length($1) - 1;
}
elsif (/^diff -/ || /^index / ||
/^old mode / || /^new mode / ||
/^deleted file mode / || /^new file mode / ||
/^similarity index / || /^dissimilarity index / ||
/^copy from / || /^copy to / ||
/^rename from / || /^rename to /) {
$nparents = undef;
print "$diff_stuff";
}
elsif (defined $nparents) {
if ($nparents == 1) {
if (/^\+/) {
print $file_new;
}
elsif (/^-/) {
print $file_old;
}
else {
print $plain_text;
}
}
elsif (/^ {$nparents}/) {
print "$plain_text";
}
elsif (/^[+ ]{$nparents}/) {
print "$file_new";
}
elsif (/^[- ]{$nparents}/) {
print "$file_old";
}
else {
print $plain_text;
}
}
elsif (/^--- / || /^\+\+\+ /) {
print $diff_stuff;
}
else {
print "$plain_text";
}
s/$/$colour{OFF}/;
print "$_";
}
close INPUTSTREAM;

sub set_color {
my ($type, $color) = @_;

$type =~ s/-/_/;
eval "\$$type = \$colour{$color}";
}

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