Add dir_truncate_root option

functions/utilities.zsh

@@ -208,3 +208,18 @@ function truncatePathFromRight() {
   echo $1 | sed $SED_EXTENDED_REGEX_PARAMETER \
  "s@(([^/]{$((POWERLEVEL9K_SHORTEN_DIR_LENGTH))})([^/]{$delim_len}))[^/]+/@\2$POWERLEVEL9K_SHORTEN_DELIMITER/@g"
 }
+
+# Search recursively in parent folders for given file.
+function upsearch () {
+  if test -e "$1"; then
+    echo "$PWD"
+  else
+    if [[ "$PWD" == "/" || "$PWD" == "$HOME" ]]; then
+      echo "$PWD";
+    else
+      pushd .. > /dev/null
+      upsearch "$1"
+      popd > /dev/null
+    fi
+  fi
+}

powerlevel9k.zsh-theme

@@ -571,8 +571,7 @@ prompt_custom() {
 set_default POWERLEVEL9K_DIR_PATH_SEPARATOR "/"
 prompt_dir() {
   local current_path='%~'
-  if [[ -n "$POWERLEVEL9K_SHORTEN_DIR_LENGTH" ]]; then
-
+  if [[ -n "$POWERLEVEL9K_SHORTEN_DIR_LENGTH" || "$POWERLEVEL9K_SHORTEN_STRATEGY" == "truncate_with_root_marker" ]]; then
     set_default POWERLEVEL9K_SHORTEN_DELIMITER $'\U2026'
 
     case "$POWERLEVEL9K_SHORTEN_STRATEGY" in
@@ -610,6 +609,20 @@ prompt_dir() {
           current_path=$(truncatePathFromRight "$(pwd | sed -e "s,^$HOME,~,")" )
         fi
       ;;
+      truncate_with_root_marker)
+        local dir_truncate_root
+
+        dir_truncate_root=$(upsearch $POWERLEVEL9K_ROOT_MARKER_FILE)
+        zero='%([BSUbfksu]|([FB]|){*})'
+
+        if [[ "$dir_truncate_root" == "/" || "$dir_truncate_root" == "$HOME" ]]; then
+          current_path='%~'
+        elif [[ "$dir_truncate_root" == "$HOME"* ]]; then
+          current_path="~/$POWERLEVEL9K_SHORTEN_DELIMITER/${dir_truncate_root##*/}${PWD:${#${(S%%)dir_truncate_root//$~zero/}}}"
+        else
+          current_path="/$POWERLEVEL9K_SHORTEN_DELIMITER/${dir_truncate_root##*/}${PWD:${#${(S%%)dir_truncate_root//$~zero/}}}"
+        fi
+      ;;
       *)
         current_path="%$((POWERLEVEL9K_SHORTEN_DIR_LENGTH+1))(c:$POWERLEVEL9K_SHORTEN_DELIMITER/:)%${POWERLEVEL9K_SHORTEN_DIR_LENGTH}c"
       ;;