carefully move directory to diff location and then create symlink in original location to new location

relocate.sh

#!/usr/bin/env bash
# included shebang for completeness but likely you'd wanna tack this onto a profile or bashrc, something that gets sourced by your shell

function isDir() {                                                                                              
        if [ -d "$1" ]; then return 0; else                                                                     
                echo "$1 is not a directory, bail"                                                              
                return 1                                                                                        
        fi                                                                                                      
}                                                                                                               
                                                                                                                
function relocate() {                                                                                           
        if !isDir "$1"; then return $?; fi                                                                      
        if !isDir "$2"; then return $?; fi                                                                      
        rsync -rauvhP ${1%"/"} ${2%"/"} || rsync -rauvhP ${1%"/"} ${2%"/"}                                      
        rsync -rauvhP ${1%"/"} ${2%"/"} || return 1                                                  
        _newloc=${2%"/"}/$(basename "$1")                                                                       
        if !isDir "$_newloc"; then return $?; fi                                                                
        mv "$1" "${1}bak"                                                                                       
        ln -s "${_newloc}/" ${1%"/"}                                                                            
        if !isDir "$1"; then return $?; fi                                                                      
        rm -vrf "${1}bak"                                                                                       
}