[PATCH 05/11] completion: remove completion for git switch --orphan

[Jacob Keller <jacob.e.keller@intel.com>]

From: Jacob Keller <jacob.keller@gmail.com>

git switch with the --orphan option is used to create a new branch that
is not connected to any history and is instead based on the empty tree.

It does not make sense for completion to return anything in this case,
because there is nothing to complete. Check for --orphan, and if it's
found, immediately return from _git_switch() without completing
anything.

Add a test case which documents this expected behavior.

Signed-off-by: Jacob Keller <jacob.keller@gmail.com>
---
 contrib/completion/git-completion.bash | 11 ++++++++++-
 t/t9902-completion.sh                  |  7 +++++++
 2 files changed, 17 insertions(+), 1 deletion(-)

diff --git a/contrib/completion/git-completion.bash b/contrib/completion/git-completion.bash
index c21786f2fd00..08d3406cf3e4 100644
--- a/contrib/completion/git-completion.bash
+++ b/contrib/completion/git-completion.bash
@@ -2223,9 +2223,18 @@ _git_switch ()
 		__gitcomp_builtin switch
 		;;
 	*)
+		local track_opt="--track" only_local_ref=n
+
+		# --orphan is used to create a branch disconnected from the
+		# current history, based on the empty tree. Since the only
+		# option required is the branch name, it doesn't make sense to
+		# complete anything here.
+		if [ -n "$(__git_find_on_cmdline "--orphan")" ]; then
+			return
+		fi
+
 		# check if --track, --no-track, or --no-guess was specified
 		# if so, disable DWIM mode
-		local track_opt="--track" only_local_ref=n
 		if [ "$GIT_COMPLETION_CHECKOUT_NO_GUESS" = "1" ] ||
 		   [ -n "$(__git_find_on_cmdline "--track --no-track --no-guess")" ]; then
 			track_opt=''
diff --git a/t/t9902-completion.sh b/t/t9902-completion.sh
index a134a8791076..9d02de167219 100755
--- a/t/t9902-completion.sh
+++ b/t/t9902-completion.sh
@@ -1351,6 +1351,13 @@ test_expect_failure 'git switch - with -C and --no-track, complete all reference
 	EOF
 '
 
+# TODO: completion does not yet recognize --orphan
+test_expect_failure 'git switch - with --orphan, do not complete anything' '
+	test_completion "git switch --orphan " <<-\EOF
+
+	EOF
+'
+
 test_expect_success 'teardown after ref completion' '
 	git branch -d matching-branch &&
 	git tag -d matching-tag &&
-- 
2.25.2