| #!/usr/bin/env perl |
| # Copyright (c) 2009 David Aguilar |
| # |
| # This is a wrapper around the GIT_EXTERNAL_DIFF-compatible |
| # git-difftool-helper script. This script exports |
| # GIT_EXTERNAL_DIFF and GIT_PAGER for use by git, and |
| # GIT_DIFFTOOL_NO_PROMPT and GIT_MERGE_TOOL for use by git-difftool-helper. |
| # Any arguments that are unknown to this script are forwarded to 'git diff'. |
| |
| use strict; |
| use warnings; |
| use Cwd qw(abs_path); |
| use File::Basename qw(dirname); |
| |
| my $DIR = abs_path(dirname($0)); |
| |
| |
| sub usage |
| { |
| print << 'USAGE'; |
| usage: git difftool [--tool=<tool>] [--no-prompt] ["git diff" options] |
| USAGE |
| exit 1; |
| } |
| |
| sub setup_environment |
| { |
| $ENV{PATH} = "$DIR:$ENV{PATH}"; |
| $ENV{GIT_PAGER} = ''; |
| $ENV{GIT_EXTERNAL_DIFF} = 'git-difftool-helper'; |
| } |
| |
| sub exe |
| { |
| my $exe = shift; |
| return defined $ENV{COMSPEC} ? "$exe.exe" : $exe; |
| } |
| |
| sub generate_command |
| { |
| my @command = (exe('git'), 'diff'); |
| my $skip_next = 0; |
| my $idx = -1; |
| for my $arg (@ARGV) { |
| $idx++; |
| if ($skip_next) { |
| $skip_next = 0; |
| next; |
| } |
| if ($arg eq '-t' or $arg eq '--tool') { |
| usage() if $#ARGV <= $idx; |
| $ENV{GIT_MERGE_TOOL} = $ARGV[$idx + 1]; |
| $skip_next = 1; |
| next; |
| } |
| if ($arg =~ /^--tool=/) { |
| $ENV{GIT_MERGE_TOOL} = substr($arg, 7); |
| next; |
| } |
| if ($arg eq '--no-prompt') { |
| $ENV{GIT_DIFFTOOL_NO_PROMPT} = 'true'; |
| next; |
| } |
| if ($arg eq '-h' or $arg eq '--help') { |
| usage(); |
| } |
| push @command, $arg; |
| } |
| return @command |
| } |
| |
| setup_environment(); |
| exec(generate_command()); |