How to create a FileNameAppender

Question

Im quite new shell/bash for linux. Im trying to create a script which changes all files within a specific folder. The script should ask me following:

1. Do I want a Prefix or Suffix
2. Ask me to enter the Affix(Prefix/Suffix) word I want.
3. Ask me if I want to add a counter (so my affix word + a counter) And then change all filenames according to the parameters selected above.

Does anyone have a part of this already or can give me some tipps? I code with java but having trouble with the syntax of bash.

Answer 1

i think it's better to use arguments like -p {value} for prefix and -s {value} for sufix and -c {counter_value}, for this you can use getopts.

And to list the files in specified folder you can define the argument -f {path_to_folder} and pass this value to find command (i have a project on github that's use this https://github.com/MarciovsRocha/todoList/blob/master/teste.sh)

Should be something like that:

while getopts 'f:c:s:p:' flag; do
    case "${flag}" in
        p) prefix="${OPTARG}"  ;;
        s) sufix="${OPTARG}"   ;;
        c) counter="{$OPTARG}" ;; 
        f) path="${OPTARG}" ;;
        *) 
            echo "Invalid parameter."
            exit 1
            ;;
    esac
done
# generates an array with all files in specified folder
mapfile files <<< "$(find "$path" -maxdepth 1 ! -type d)"
# for file in array changes the name with mv 
for file in files "${files[@]}"; do
    file="$(tr -d '\n' <<< "$file")" # this will format the string removing the newline at the end
    mv "${path}/${file}" "${path}/${prefix}${file}${sufix}${counter}" this line will
done