[PATCH 2/3] submodule deinit: lose requirement for giving '.'

[Stefan Beller <sbeller@google.com>]

The discussion in [1] realized that '.' is a faulty suggestion as
there is a corner case where it fails:

> "submodule deinit ." may have "worked" in the sense that you would
> have at least one path in your tree and avoided this "nothing
> matches" most of the time.  It would have still failed with the
> exactly same error if run in an empty repository, i.e.
>
>        $ E=/var/tmp/x/empty && rm -fr "$E" && mkdir -p "$E" && cd "$E"
>        $ git init
>        $ rungit v2.6.6 submodule deinit .
>        error: pathspec '.' did not match any file(s) known to git.
>        Did you forget to 'git add'?
>        $ >file && git add file
>        $ rungit v2.6.6 submodule deinit .
>        $ echo $?
>        0

Allow no argument for `submodule deinit` to mean all submodules
and add a test to check for the corner case of an empty repository.

There is no need to update the documentation as it did not describe the
special case '.' to remove all submodules.

[1] http://news.gmane.org/gmane.comp.version-control.git/289535

Signed-off-by: Stefan Beller <sbeller@google.com>
---
 git-submodule.sh           | 5 -----
 t/t7400-submodule-basic.sh | 5 ++++-
 2 files changed, 4 insertions(+), 6 deletions(-)

diff --git a/git-submodule.sh b/git-submodule.sh
index 82e95a9..d689265 100755
--- a/git-submodule.sh
+++ b/git-submodule.sh
@@ -428,11 +428,6 @@ cmd_deinit()
 		shift
 	done
 
-	if test $# = 0
-	then
-		die "$(eval_gettext "Use '.' if you really want to deinitialize all submodules")"
-	fi
-
 	git submodule--helper list --prefix "$wt_prefix" "$@" |
 	while read mode sha1 stage sm_path
 	do
diff --git a/t/t7400-submodule-basic.sh b/t/t7400-submodule-basic.sh
index 90d80d3..9af47b5 100755
--- a/t/t7400-submodule-basic.sh
+++ b/t/t7400-submodule-basic.sh
@@ -11,6 +11,10 @@ subcommands of git submodule.
 
 . ./test-lib.sh
 
+test_expect_success 'submodule deinit works on empty repository' '
+	git submodule deinit
+'
+
 test_expect_success 'setup - initial commit' '
 	>t &&
 	git add t &&
@@ -948,7 +952,6 @@ test_expect_success 'submodule deinit . deinits all initialized submodules' '
 	git submodule update --init &&
 	git config submodule.example.foo bar &&
 	git config submodule.example2.frotz nitfol &&
-	test_must_fail git submodule deinit &&
 	git submodule deinit . >actual &&
 	test -z "$(git config --get-regexp "submodule\.example\.")" &&
 	test -z "$(git config --get-regexp "submodule\.example2\.")" &&
-- 
2.8.0.37.gb114fff.dirty