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git-difftool: Add '--gui' for selecting a GUI tool

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Users might prefer to have git-difftool use a different
tool when run from a Git GUI.

This teaches git-difftool to honor 'diff.guitool' when
the '--gui' option is specified.  This allows users to
configure their preferred command-line diff tool in
'diff.tool' and a GUI diff tool in 'diff.guitool'.

Reference: http://article.gmane.org/gmane.comp.version-control.git/133386
Signed-off-by: David Aguilar <davvid@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
David Aguilar 2009-12-22 21:27:14 -08:00 committed by Junio C Hamano
parent 23218bbd2e
commit 4cefa495ca
3 changed files with 33 additions and 1 deletions
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9
Documentation/git-difftool.txt
View file

@ -58,6 +58,12 @@ is set to the name of the temporary file containing the contents
of the diff post-image. `$BASE` is provided for compatibility
with custom merge tool commands and has the same value as `$LOCAL`.
-g::
--gui::
When 'git-difftool' is invoked with the `-g` or `--gui` option
the default diff tool will be read from the configured
`diff.guitool` variable instead of `diff.tool`.
See linkgit:git-diff[1] for the full list of supported options.
CONFIG VARIABLES
@ -68,6 +74,9 @@ difftool equivalents have not been defined.
diff.tool::
The default diff tool to use.
diff.guitool::
The default diff tool to use when `--gui` is specified.
difftool.<tool>.path::
Override the path for the given tool. This is useful in case
your tool is not in the PATH.

13
git-difftool.perl
View file

@ -15,13 +15,16 @@
use Cwd qw(abs_path);
use File::Basename qw(dirname);
require Git;
my $DIR = abs_path(dirname($0));
sub usage
{
print << 'USAGE';
usage: git difftool [--tool=<tool>] [-y|--no-prompt] ["git diff" options]
usage: git difftool [-g|--gui] [-t|--tool=<tool>] [-y|--no-prompt]
["git diff" options]
USAGE
exit 1;
}
@ -63,6 +66,14 @@ sub generate_command
$ENV{GIT_DIFF_TOOL} = substr($arg, 7);
next;
}
if ($arg eq '-g' || $arg eq '--gui') {
my $tool = Git::command_oneline('config',
'diff.guitool');
if (length($tool)) {
$ENV{GIT_DIFF_TOOL} = $tool;
}
next;
}
if ($arg eq '-y' || $arg eq '--no-prompt') {
$ENV{GIT_DIFFTOOL_NO_PROMPT} = 'true';
delete $ENV{GIT_DIFFTOOL_PROMPT};

12
t/t7800-difftool.sh
View file

@ -19,6 +19,7 @@ remove_config_vars()
{
# Unset all config variables used by git-difftool
git config --unset diff.tool
git config --unset diff.guitool
git config --unset difftool.test-tool.cmd
git config --unset difftool.prompt
git config --unset merge.tool
@ -77,6 +78,17 @@ test_expect_success 'difftool ignores bad --tool values' '
test "$diff" = ""
'
test_expect_success 'difftool honors --gui' '
git config merge.tool bogus-tool &&
git config diff.tool bogus-tool &&
git config diff.guitool test-tool &&
diff=$(git difftool --no-prompt --gui branch) &&
test "$diff" = "branch" &&
restore_test_defaults
'
# Specify the diff tool using $GIT_DIFF_TOOL
test_expect_success 'GIT_DIFF_TOOL variable' '
git config --unset diff.tool