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d531174fe3
In particular, test 14 'difftool last flag wins' in t7800 fails. This is caused by git-difftool.perl passing both GIT_DIFFTOOL_NO_PROMPT (='true') and GIT_DIFFTOOL_PROMPT (='true') to the difftool helper script. Despite the appropriate key being deleted from the ENV hash, it seems that once a key has been set in the hash, it gets passed along to the system() call. (ie deleting the key does not do the equivalent of unsetenv()). In order to fix the problem, we keep track of the required prompt state while processing the arguments, and then set the relevant ENV hash key only once at the end. Signed-off-by: Ramsay Jones <ramsay@ramsay1.demon.co.uk> Signed-off-by: Junio C Hamano <gitster@pobox.com>
122 lines
2.6 KiB
Perl
Executable File
122 lines
2.6 KiB
Perl
Executable File
#!/usr/bin/env perl
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# Copyright (c) 2009, 2010 David Aguilar
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#
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# This is a wrapper around the GIT_EXTERNAL_DIFF-compatible
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# git-difftool--helper script.
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#
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# This script exports GIT_EXTERNAL_DIFF and GIT_PAGER for use by git.
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# GIT_DIFFTOOL_NO_PROMPT, GIT_DIFFTOOL_PROMPT, and GIT_DIFF_TOOL
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# are exported for use by git-difftool--helper.
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#
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# Any arguments that are unknown to this script are forwarded to 'git diff'.
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use 5.008;
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use strict;
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use warnings;
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use Cwd qw(abs_path);
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use File::Basename qw(dirname);
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require Git;
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my $DIR = abs_path(dirname($0));
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sub usage
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{
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print << 'USAGE';
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usage: git difftool [-t|--tool=<tool>] [-x|--extcmd=<cmd>]
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[-y|--no-prompt] [-g|--gui]
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['git diff' options]
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USAGE
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exit 1;
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}
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sub setup_environment
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{
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$ENV{PATH} = "$DIR:$ENV{PATH}";
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$ENV{GIT_PAGER} = '';
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$ENV{GIT_EXTERNAL_DIFF} = 'git-difftool--helper';
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}
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sub exe
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{
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my $exe = shift;
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if ($^O eq 'MSWin32' || $^O eq 'msys') {
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return "$exe.exe";
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}
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return $exe;
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}
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sub generate_command
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{
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my @command = (exe('git'), 'diff');
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my $skip_next = 0;
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my $idx = -1;
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my $prompt = '';
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for my $arg (@ARGV) {
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$idx++;
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if ($skip_next) {
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$skip_next = 0;
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next;
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}
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if ($arg eq '-t' || $arg eq '--tool') {
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usage() if $#ARGV <= $idx;
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$ENV{GIT_DIFF_TOOL} = $ARGV[$idx + 1];
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$skip_next = 1;
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next;
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}
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if ($arg =~ /^--tool=/) {
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$ENV{GIT_DIFF_TOOL} = substr($arg, 7);
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next;
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}
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if ($arg eq '-x' || $arg eq '--extcmd') {
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usage() if $#ARGV <= $idx;
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$ENV{GIT_DIFFTOOL_EXTCMD} = $ARGV[$idx + 1];
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$skip_next = 1;
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next;
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}
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if ($arg =~ /^--extcmd=/) {
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$ENV{GIT_DIFFTOOL_EXTCMD} = substr($arg, 9);
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next;
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}
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if ($arg eq '-g' || $arg eq '--gui') {
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eval {
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my $tool = Git::command_oneline('config',
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'diff.guitool');
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if (length($tool)) {
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$ENV{GIT_DIFF_TOOL} = $tool;
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}
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};
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next;
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}
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if ($arg eq '-y' || $arg eq '--no-prompt') {
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$prompt = 'no';
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next;
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}
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if ($arg eq '--prompt') {
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$prompt = 'yes';
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next;
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}
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if ($arg eq '-h' || $arg eq '--help') {
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usage();
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}
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push @command, $arg;
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}
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if ($prompt eq 'yes') {
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$ENV{GIT_DIFFTOOL_PROMPT} = 'true';
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} elsif ($prompt eq 'no') {
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$ENV{GIT_DIFFTOOL_NO_PROMPT} = 'true';
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}
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return @command
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}
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setup_environment();
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# ActiveState Perl for Win32 does not implement POSIX semantics of
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# exec* system call. It just spawns the given executable and finishes
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# the starting program, exiting with code 0.
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# system will at least catch the errors returned by git diff,
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# allowing the caller of git difftool better handling of failures.
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my $rc = system(generate_command());
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exit($rc | ($rc >> 8));
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