Shorter version

Author: redbaron

upto.sh

@@ -1,33 +1,7 @@
 #!/bin/bash
-function upto() {
-	local EXPRESSION="$1"
-	if [ -z "$EXPRESSION" ]; then
-		echo "A folder expression must be provided." >&2
-		return 1
-	fi
-	if [ "$EXPRESSION" = "/" ]; then
-		cd "/"
-		return 0
-	fi
-	local CURRENT_FOLDER="$(pwd)"
-	local MATCHED_DIR=""
-	local MATCHING=true
-
-	while [ "$MATCHING" = true ]; do
-		if [[ "$CURRENT_FOLDER" =~ "$EXPRESSION" ]]; then
-			MATCHED_DIR="$CURRENT_FOLDER"
-			CURRENT_FOLDER=$(dirname "$CURRENT_FOLDER")
-		else
-			MATCHING=false
-		fi
-	done
-	if [ -n "$MATCHED_DIR" ]; then
-		cd "$MATCHED_DIR"
-		return 0
-	else
-		echo "No Match." >&2
-		return 1
-	fi
+function upto() { 
+  local D=${PWD%${PWD#*/*([^/])$1*/}}
+  [[ -z "$D" ]] || cd "$D"
 }
 
 # complete upto