completion: protect prompt against unset SHOWUPSTREAM in nounset mode
As it stands, the only call site of `__git_ps1_show_upstream` checks
that the `GIT_PS1_SHOWUPSTREAM` variable is set, so this is effectively
a no-op. However, that might change, and chances of noticing the
unprotected use might not be that high when it does.
Signed-off-by: Ville Skyttä <ville.skytta@iki.fi>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
diff --git a/contrib/completion/git-prompt.sh b/contrib/completion/git-prompt.sh
index 3826f52..5330e76 100644
--- a/contrib/completion/git-prompt.sh
+++ b/contrib/completion/git-prompt.sh
@@ -141,7 +141,7 @@
# parse configuration values
local option
- for option in ${GIT_PS1_SHOWUPSTREAM}; do
+ for option in ${GIT_PS1_SHOWUPSTREAM-}; do
case "$option" in
git|svn) upstream_type="$option" ;;
verbose) verbose=1 ;;
