[PATCH v4 2/3] completion: sparse-checkout updates

["Lessley Dennington via GitGitGadget" <gitgitgadget@gmail.com>]

From: Lessley Dennington <lessleydennington@gmail.com>

Fix custom tab completion for the sparse-checkout command. This will
ensure:

1. The full list of subcommands is provided when users enter git
sparse-checkout <TAB>.
2. Subcommand options are tab-completable.
3. A list of directories (but not files) is provided when users enter git
sparse-checkout add <TAB> or git sparse-checkout set <TAB> in cone mode
only. In non-cone mode, these commands will continue to complete both
directory and file names.

Failing tests that were added in the previous commit to verify these
scenarios are now passing with these updates.

Signed-off-by: Lessley Dennington <lessleydennington@gmail.com>
---
 contrib/completion/git-completion.bash | 15 ++++++++-------
 t/t9902-completion.sh                  |  4 ++--
 2 files changed, 10 insertions(+), 9 deletions(-)

diff --git a/contrib/completion/git-completion.bash b/contrib/completion/git-completion.bash
index c82ccaebcc7..a920cdab201 100644
--- a/contrib/completion/git-completion.bash
+++ b/contrib/completion/git-completion.bash
@@ -2988,21 +2988,22 @@ _git_show_branch ()
 
 _git_sparse_checkout ()
 {
-	local subcommands="list init set disable"
+	local subcommands="list init set disable add reapply"
 	local subcommand="$(__git_find_on_cmdline "$subcommands")"
+
 	if [ -z "$subcommand" ]; then
 		__gitcomp "$subcommands"
 		return
 	fi
 
 	case "$subcommand,$cur" in
-	init,--*)
-		__gitcomp "--cone"
-		;;
-	set,--*)
-		__gitcomp "--stdin"
+		*,--*)
+			__gitcomp_builtin sparse-checkout_$subcommand "" "--"
 		;;
-	*)
+		set,*|add,*)
+			if [ $(__git config core.sparseCheckoutCone) ]; then
+				__git_complete_index_file "--directory"
+			fi
 		;;
 	esac
 }
diff --git a/t/t9902-completion.sh b/t/t9902-completion.sh
index 6004d854102..f56ba3f64c9 100755
--- a/t/t9902-completion.sh
+++ b/t/t9902-completion.sh
@@ -1447,7 +1447,7 @@ test_expect_success 'git checkout - with --detach, complete only references' '
 	EOF
 '
 
-test_expect_failure 'sparse-checkout completes subcommands' '
+test_expect_success 'sparse-checkout completes subcommands' '
 	test_completion "git sparse-checkout " <<-\EOF
 	list Z
 	init Z
@@ -1458,7 +1458,7 @@ test_expect_failure 'sparse-checkout completes subcommands' '
 	EOF
 '
 
-test_expect_failure 'cone mode sparse-checkout completes directory names' '
+test_expect_success 'cone mode sparse-checkout completes directory names' '
 	# set up sparse-checkout repo
 	git init sparse-checkout &&
 	(
-- 
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