mergetool: fallback to tool when guitool unavailable
In git-difftool, if the tool is called with --gui but `diff.guitool` is
not set, it falls back to `diff.tool`. Make git-mergetool also fallback
from `merge.guitool` to `merge.tool` if the former is undefined.
If git-difftool, when called with `--gui`, were to use
`get_configured_mergetool` in a future patch, it would also get the
fallback behavior in the following precedence:
1. diff.guitool
2. merge.guitool
3. diff.tool
4. merge.tool
The behavior for when difftool or mergetool are called without `--gui`
should be identical with or without this patch.
Note that the search loop could be written as
sections="merge"
keys="tool"
if diff_mode
then
sections="diff $sections"
fi
if gui_mode
then
keys="guitool $keys"
fi
merge_tool=$(
IFS=' '
for key in $keys
do
for section in $sections
do
selected=$(git config $section.$key)
if test -n "$selected"
then
echo "$selected"
return
fi
done
done)
which would make adding a mode in the future much easier. However,
adding a new mode will likely never happen as it is highly discouraged
so, as a result, it is written in its current form so that it is more
readable for future readers.
Signed-off-by: Denton Liu <liu.denton@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
diff --git a/t/t7610-mergetool.sh b/t/t7610-mergetool.sh
index dad607e..5b61c10 100755
--- a/t/t7610-mergetool.sh
+++ b/t/t7610-mergetool.sh
@@ -167,6 +167,25 @@
git commit -m "branch1 resolved with mergetool"
'
+test_expect_success 'gui mergetool without merge.guitool set falls back to merge.tool' '
+ test_when_finished "git reset --hard" &&
+ git checkout -b test$test_count branch1 &&
+ git submodule update -N &&
+ test_must_fail git merge master &&
+ ( yes "" | git mergetool --gui both ) &&
+ ( yes "" | git mergetool -g file1 file1 ) &&
+ ( yes "" | git mergetool --gui file2 "spaced name" ) &&
+ ( yes "" | git mergetool --gui subdir/file3 ) &&
+ ( yes "d" | git mergetool --gui file11 ) &&
+ ( yes "d" | git mergetool --gui file12 ) &&
+ ( yes "l" | git mergetool --gui submod ) &&
+ test "$(cat file1)" = "master updated" &&
+ test "$(cat file2)" = "master new" &&
+ test "$(cat subdir/file3)" = "master new sub" &&
+ test "$(cat submod/bar)" = "branch1 submodule" &&
+ git commit -m "branch1 resolved with mergetool"
+'
+
test_expect_success 'mergetool crlf' '
test_when_finished "git reset --hard" &&
# This test_config line must go after the above reset line so that
