#!/usr/bin/env fish
if argparse -n 'fish-add-user-path' -N 1 'h/help' -- $argv
    ;
else
    exit
end

function add_to_path_if_not_there
    set exists 0

    # normalize path to end with /
    switch $argv
    case "*/"
        set new_path $argv
    case "*"
        set new_path "$argv/"
    end

    for x in (string split " " $fish_user_paths)
        if test "$x" = "$new_path"
            set exists 1
            break
        end
    end

    if test "$exists" = "0"
        set -Ux fish_user_paths $fish_user_paths $new_path
    end   
end

# validate that paths exists
for x in (string split " " $argv)
    if test -d $x
        ;
    else
        echo "Path '$x' does not exist"
        exit
    end
end


for x in (string split " " $argv)
    add_to_path_if_not_there $x 
end