git: make super-prefix option

diff --git a/contrib/completion/git-prompt.sh b/contrib/completion/git-prompt.sh
index 07b52bedf183231b5708caf1ce255a115c9a980c..97eacd7832b28377c5e14918ce6bededc55d7d40 100644 (file)
--- a/contrib/completion/git-prompt.sh
+++ b/contrib/completion/git-prompt.sh
@@ -355,8 +355,8 @@ __git_ps1 ()
        # incorrect.)
        #
        local ps1_expanded=yes
-       [ -z "$ZSH_VERSION" ] || [[ -o PROMPT_SUBST ]] || ps1_expanded=no
-       [ -z "$BASH_VERSION" ] || shopt -q promptvars || ps1_expanded=no
+       [ -z "${ZSH_VERSION-}" ] || [[ -o PROMPT_SUBST ]] || ps1_expanded=no
+       [ -z "${BASH_VERSION-}" ] || shopt -q promptvars || ps1_expanded=no
 
        local repo_info rev_parse_exit_code
        repo_info="$(git rev-parse --git-dir --is-inside-git-dir \
@@ -368,7 +368,7 @@ __git_ps1 ()
                return $exit
        fi
 
-       local short_sha
+       local short_sha=""
        if [ "$rev_parse_exit_code" = "0" ]; then
                short_sha="${repo_info##*$'\n'}"
                repo_info="${repo_info%$'\n'*}"
@@ -476,10 +476,9 @@ __git_ps1 ()
                if [ -n "${GIT_PS1_SHOWDIRTYSTATE-}" ] &&
                   [ "$(git config --bool bash.showDirtyState)" != "false" ]
                then
-                       git diff --no-ext-diff --quiet --exit-code || w="*"
-                       if [ -n "$short_sha" ]; then
-                               git diff-index --cached --quiet HEAD -- || i="+"
-                       else
+                       git diff --no-ext-diff --quiet || w="*"
+                       git diff --no-ext-diff --cached --quiet || i="+"
+                       if [ -z "$short_sha" ] && [ -z "$i" ]; then
                                i="#"
                        fi
                fi