completion: add proper public __git_complete

When __git_complete was introduced, it was meant to be temporarily, while
a proper guideline for public shell functions was established
(tentatively _GIT_complete), but since that never happened, people
in the wild started to use __git_complete, even though it was marked as
not public.

Eight years is more than enough wait, let's mark this function as
public, and make it a bit more user-friendly.

So that instead of doing:

  __git_complete gk __gitk_main

The user can do:

  __git_complete gk gitk

And instead of:

  __git_complete gf _git_fetch

Do:

  __git_complete gf git_fetch

Backwards compatibility is maintained.

Signed-off-by: Felipe Contreras <felipe.contreras@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

1 files changed, 13 insertions, 1 deletions

diff --git a/t/t9902-completion.sh b/t/t9902-completion.sh
index c0b4380..c4a7758 100755
--- a/t/t9902-completion.sh
+++ b/t/t9902-completion.sh
@@ -2382,10 +2382,22 @@ test_expect_success 'sourcing the completion script clears cached --options' '
 
 test_expect_success '__git_complete' '
 	unset -f __git_wrap__git_main &&
+
 	__git_complete foo __git_main &&
 	__git_have_func __git_wrap__git_main &&
+	unset -f __git_wrap__git_main &&
+
 	__git_complete gf _git_fetch &&
-	__git_have_func __git_wrap_git_fetch
+	__git_have_func __git_wrap_git_fetch &&
+
+	__git_complete foo git &&
+	__git_have_func __git_wrap__git_main &&
+	unset -f __git_wrap__git_main &&
+
+	__git_complete gd git_diff &&
+	__git_have_func __git_wrap_git_diff &&
+
+	test_must_fail __git_complete ga missing
 '
 
 test_done