Shell script for quick navigation upwards in directories :

goto (goupto)

#!/bin/bash


# .. 
# Installation guide:
# 1. Paste this code in a file. Let say - in "/home/{user}/bin" and name it - for example - "goto"
# 2. In .bash_alias add an alias like so: "alias gt=". /home/{user}/bin/goto". NOTE the dot and the interval after it!
# 3. Make sure you've "sourced" the .bash_alias file. (cd ~; source .bash_alias)
# 4. Try "gt" anywhere, with or without parameters
# .. 
# Or - to be closer with Shell's naming convention - name the file "goupto" and the alias "alias gut=". /home/{user}/bin/goupto".


# First - check if user specified one parameter .. 
if (( $# != 1)); then
	desiredDir=""
else
	desiredDir=$1
fi

# echo "Desired directory is: $desiredDir"

# Split the full directory into array .. 
IFS='/' read -r -a foldersArray <<< "$PWD"

# Define the variable for all directories .. 
allDirectories=()

# All real directories - in array .. 
index=0
oneFolder=""
for folder in "${foldersArray[@]}"
do
	if [ "$folder" != "" ]; then

		oneFolder="$oneFolder/$folder"

		# Check if supplied parameter is in folder .. 
		if [[ $oneFolder == *$desiredDir* ]]; then

				allDirectories[$index]=$oneFolder
				# Increment the index .. 
				index=$((index+1))
 
		fi
	fi
done

# Check if we have found any folder at all .. 
if [ "$index" -gt 0 ]; then

	# Define some colors we'll use .. 
	RED='\033[0;31m'
	GREEN='\033[1;32m'
	YELLOW='\033[1;33m'
	DARKGREEN='\033[1;32m'
	CIAN='\033[1;36m'
	NOCOLOR='\033[0m'


	if [ "$index" -eq 1 ]; then

		# if only option is PWD - don't navigate .. 
		if [ "$PWD" == "${allDirectories[0]}" ]; then
			printf "${GREEN}Staying${NOCOLOR} in $PWD\n"
			echo "Bye for now"
		else
			printf "${CIAN}Navigating${NOCOLOR} to ${allDirectories[0]}\n"
			cd ${allDirectories[0]}
		fi

	else
 
		# Output full directories .. 
		echo "Choose:"

		ii=0
		numberOfChoice=""
		for (( jj=$index-1; jj >= 0; jj-- ))
		do
			ii=$((ii+1))

			# In case we have 10+ results - show leading empty space .. 
			if [ "$index" -gt 9 ] && [ $ii -lt 10 ]; then
				numberOfChoice=" $ii"
			else
				numberOfChoice="$ii"
			fi

			# Show the choice .. 
			if [ "$desiredDir" == "" ]; then
				echo "$numberOfChoice: ${allDirectories[$jj]}"
			else
				printf "$numberOfChoice: ${allDirectories[$jj]//$desiredDir/${YELLOW}${desiredDir}${NOCOLOR}}\n"
			fi

		done

		# Wait for user to choose .. 
		printf ">"

		while : ; do

			read choice

			# check if user has entered an integer .. 
			if [ $choice -eq $choice 2>/dev/null ]; then
				break
			else
				printf "You must type a ${YELLOW}number${NOCOLOR}!\n"
				printf ">"
			fi
		done

		# If user entered valid choice - navigate to it .. 
		if [ "$choice" -gt 0 ] && [ "$choice" -le "$index" ]; then

			indexOfChosen=$((index-choice))
			folderToNavigate=${allDirectories[$indexOfChosen]}

			# if chosen option is PWD - don't navigate .. 
			if [ "$PWD" == "$folderToNavigate" ]; then
				printf "${GREEN}Staying${NOCOLOR} in $PWD\n"
				echo "Bye for now"
			else
				printf "${CIAN}Navigating${NOCOLOR} to ${folderToNavigate}\n"
				cd ${folderToNavigate}
			fi

		else

			printf "${GREEN}Staying${NOCOLOR} in $PWD\n"
			echo "Bye for now"

		fi

	fi

else
	printf "${CIAN}No such folder${NOCOLOR}\n"
	# exit 1
fi