[PATCH] completion: audit and guard $GIT_* against unset use

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$GIT_COMPLETION_SHOW_ALL and $GIT_TESTING_ALL_COMMAND_LIST were used
without guarding against them being unset, causing errors in nounset
(set -u) mode.

No other nounset-unsafe $GIT_* usages were found.

While at it, remove a superfluous (duplicate) unset guard from $GIT_DIR
in __git_find_repo_path.

Signed-off-by: Ville Skyttä <ville.skytta@xxxxxx>
---
 contrib/completion/git-completion.bash | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/contrib/completion/git-completion.bash b/contrib/completion/git-completion.bash
index e1a66954fe..29b859a0b8 100644
--- a/contrib/completion/git-completion.bash
+++ b/contrib/completion/git-completion.bash
@@ -77,7 +77,7 @@ __git_find_repo_path ()
 		test -d "$__git_dir" &&
 		__git_repo_path="$__git_dir"
 	elif [ -n "${GIT_DIR-}" ]; then
-		test -d "${GIT_DIR-}" &&
+		test -d "$GIT_DIR" &&
 		__git_repo_path="$GIT_DIR"
 	elif [ -d .git ]; then
 		__git_repo_path=.git
@@ -427,7 +427,7 @@ __gitcomp_builtin ()
 
 	if [ -z "$options" ]; then
 		local completion_helper
-		if [ "$GIT_COMPLETION_SHOW_ALL" = "1" ]; then
+		if [ "${GIT_COMPLETION_SHOW_ALL-}" = "1" ]; then
 			completion_helper="--git-completion-helper-all"
 		else
 			completion_helper="--git-completion-helper"
@@ -1910,7 +1910,7 @@ _git_help ()
 		return
 		;;
 	esac
-	if test -n "$GIT_TESTING_ALL_COMMAND_LIST"
+	if test -n "${GIT_TESTING_ALL_COMMAND_LIST-}"
 	then
 		__gitcomp "$GIT_TESTING_ALL_COMMAND_LIST $(__git --list-cmds=alias,list-guide) gitk"
 	else
-- 
2.25.1




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