bash: don't use realpath in prompt

.mgr_config/.bashrc

@@ -56,15 +56,12 @@ prompt_function() {
   prompt+="$(whoami)@$(hostname)${RST}:"
   if root=$(git_root); then
       # If in a git repository, only print the path relative to the repo root
-      path=$(realpath --relative-to=$root $PWD)
+      path=$(git rev-parse --show-prefix)
       ref=$(git symbolic-ref --short -q HEAD)
       if [[ $ref == "" ]]; then
           ref="${WARN_COLOR}detached${GIT_COLOR}"
       fi
       dirty=$(git diff-index --quiet HEAD)
-      if [[ $path == . ]]; then
-          path=""
-      fi
       prompt+="${GIT_COLOR}[$(basename $root)@${ref}:${DIR_COLOR}${path}${fg}${GIT_COLOR}]${RST}"
   else
       # If not in a git repo, print the full path