[PATCH] git-prompt: GIT_PS1_SHOWCONFLICTSTATE variable fix

["Michiel W. Beijen" <mb@x14.nl>]

There are a few environment variables that can influence the output for
the __git_ps1 macro in git-prompt.sh. All settings that are 'on/off'
types such as GIT_PS1_SHOWUNTRACKEDFILES and GIT_PS1_SHOWDIRTYSTATE
just take any value, and in the tests are tested with 'y', however
GIT_PS1_SHOWCONFLICTSTATE must be set to 'yes' otherwise it will not
work.

This commit changes that behaviour, and makes sure
GIT_PS1_SHOWCONFLICTSTATE is consistent with these other parameters.

Signed-off-by: Michiel W. Beijen <mb@x14.nl>
---
 contrib/completion/git-prompt.sh | 6 +++---
 t/t9903-bash-prompt.sh           | 2 +-
 2 files changed, 4 insertions(+), 4 deletions(-)

diff --git a/contrib/completion/git-prompt.sh b/contrib/completion/git-prompt.sh
index 71f179cba3..fd6141e463 100644
--- a/contrib/completion/git-prompt.sh
+++ b/contrib/completion/git-prompt.sh
@@ -85,8 +85,8 @@
 # by setting GIT_PS1_OMITSPARSESTATE.
 #
 # If you would like to see a notification on the prompt when there are
-# unresolved conflicts, set GIT_PS1_SHOWCONFLICTSTATE to "yes". The
-# prompt will include "|CONFLICT".
+# unresolved conflicts, set GIT_PS1_SHOWCONFLICTSTATE to a nonempty
+# value. The prompt will include "|CONFLICT".
 #
 # If you would like to see more information about the identity of
 # commits checked out as a detached HEAD, set GIT_PS1_DESCRIBE_STYLE
@@ -528,7 +528,7 @@ __git_ps1 ()
 	fi
 
 	local conflict="" # state indicator for unresolved conflicts
-	if [[ "${GIT_PS1_SHOWCONFLICTSTATE}" == "yes" ]] &&
+	if [ -n "${GIT_PS1_SHOWCONFLICTSTATE-}" ] &&
 	   [[ $(git ls-files --unmerged 2>/dev/null) ]]; then
 		conflict="|CONFLICT"
 	fi
diff --git a/t/t9903-bash-prompt.sh b/t/t9903-bash-prompt.sh
index d667dda654..6479a0d898 100755
--- a/t/t9903-bash-prompt.sh
+++ b/t/t9903-bash-prompt.sh
@@ -769,7 +769,7 @@ test_expect_success 'prompt - conflict indicator' '
 	test_when_finished "git reset --hard HEAD~" &&
 	test_must_fail git stash apply &&
 	(
-		GIT_PS1_SHOWCONFLICTSTATE="yes" &&
+		GIT_PS1_SHOWCONFLICTSTATE=y &&
 		__git_ps1 >"$actual"
 	) &&
 	test_cmp expected "$actual"

base-commit: 3bd955d26919e149552f34aacf8a4e6368c26cec
-- 
2.43.0