#!/usr/bin/env fish

# set_default sets a variable with
# global scope (-g), if it is not already set
#
# Examples:
#
# set EXAMPLE_1 "hello"
# set_default EXAMPLE_1 "world"
# echo $EXAMPLE_1 # "hello"
#
# set_default EXAMPLE_2 "world"
# echo $EXAMPLE_2 # "world"
function set_default
    argparse -i 'u/universal' -- $argv
    if not set -q $argv[1];
        if set -q _flag_universal
#            echo "set -U $argv[1] $argv[2..]" 1>&2
            set -U $argv[1] $argv[2..]
        else
 #           echo "set -g $argv[1] $argv[2..]" 1>&2
            set -g $argv[1] $argv[2..]
        end
    end
end