#!/usr/bin/env bash

filter_no_dots() {
    # Desc: Filters stdin lines for paths with basenames that are not dotfiles
    # Usage: printf "foo\n" | filter_no_dots [path]
    # Input: stdin (consumes)
    #        args
    # Output: stdout (only outputs lines if basename is not a dotfile)
    # Version: 0.0.1
    # Depends: GNU bash (v5.1.16)

    local input_stdin input_psarg buffer re output;

    # Store stdin
    if [[ -p /dev/stdin ]]; then
        input_stdin="$(cat -)";
    fi;

    # Store arguments
    if [[ $# -gt 0 ]]; then
        input_psarg="$*";
    fi;

    # Combine as buffer array elements
    ## Read in stdin
    if [[ -n $input_stdin ]]; then
        while read -r line; do
            buffer+=("$line");
        done < <(printf "%s\n" "$input_stdin");
    fi;
    ## Read in positional arguments
    if [[ -n $input_psarg ]]; then
        for arg in "$@"; do
            buffer+=("$arg");
        done;
    fi;    

    # Form output array
    re="^\."; # first char is a dot
    while read -r line; do
        # Get path basename
        file_name="$(basename "$line")";
        # Add path to output if basename not a dotfile
        if [[ ! "$file_name" =~ $re ]]; then
            output+=("$line");
        else
            continue;
        fi;
    done < <( printf "%s\n" "${buffer[@]}" );
    
    # Print output array to stdout
    printf "%s\n" "${output[@]}";
}; # Filters stdin lines for paths with basenames that are not dotfiles

# Test
printf "foo\n.bar\nbaz\n" | filter_no_dots "$HOME/.local" "$HOME/"