WINDOWS -> UNIX EOL bash script

wintounix_eol.sh

#!/bin/bash

#Functiond used for ensuring that file passed as argument has UNIX EOL
ensure_unix_eol(){
    local file=$1
    
    if [[ $# -eq 0 ]]; then
        echo -e "\nERROR: No arguments passed. Script cannot continue. Exiting...\n"
        exit 1
    elif [[ $# -gt 1 ]]; then
        echo -e "\nERROR: This function takes only one argument. Script cannot continue. Exiting...\n"
        exit 1
    fi
    
    if [[ -f $file ]]; then
        echo -e "\nINFO: '$file' file found.\n"
        file $file | grep -q CRLF
        if [[ $? -eq 0 ]]; then
            echo -e "\nINFO: Windows EOL (CRLF) detected in the '$file' file. Converting it to UNIX EOL (LF)...\n"
            sed -i 's/\r$//g' $file
            file $file | grep -q CRLF
            if [[ $? -eq 1 ]]; then
                echo -e "\nSUCCESS: Windows EOL (CRLF) -> UNIX EOL (LF) conversion on '$file' file successful. Continuuing...\n"
            else
                echo -e "\nINFO: Windows EOL (CRLF) still present  in the '$file'. Interrupting installation...\n"
                exit 1
            fi
        else
            echo -e "\nINFO: UNIX EOL (LF) detected in the '$file' file. Continuuing...\n"
        fi
    else
        echo -e "\nERROR: Could not find '$file'. Installation script cannot continue. Interrupting installation...\n"
        exit 1
    fi
}