Create new file but add number if filename already exists in bash

Question

I found similar questions but not in Linux/Bash

I want my script to create a file with a given name (via user input) but add number at the end if filename already ex

Answer 1

Try something like this

name=somefile
path=$(dirname "$name")
filename=$(basename "$name")
extension="${filename##*.}"
filename="${filename%.*}"
if [[ -e $path/$filename.$extension ]] ; then
    i=2
    while [[ -e $path/$filename-$i.$extension ]] ; do
        let i++
    done
    filename=$filename-$i
fi
target=$path/$filename.$extension