variables

#!/bin/bash
#
# Example for gl-common.bash
#
# CC0 - Public Domain, jeremy.walther@golflima.net
# To the extent possible under law, Jérémy Walther has waived
# all copyright and related or neighboring rights to this file.
# This work is published from: France.
# See: <https://creativecommons.org/publicdomain/zero/1.0/deed>
#
# Feel free to use it as you want.
#
# This example is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

# Load gl-common.bash
readonly EXAMPLE_DIR=$(dirname "$(echo "$(readlink -f "$0")" | sed -e 's,\\,/,g')")
. "${EXAMPLE_DIR}/../gl-common.sh" EXAMPLE_
if [[ $? > 0 ]]; then echo "Error when loading file '${EXAMPLE_DIR}/../gl-common.sh'"; exit 1; fi

set_var FOO BAR
set_var BAR ''
trace_var FOO
trace $(get_var FOO)
get_var FOO
echo
init_var LICENSE "spinner_green 'curl -sL https://www.gnu.org/licenses/lgpl-3.0.txt' | escape_piped"
grep GNU "${EXAMPLE_DIR}/../LICENSE" <<< "${LICENSE}" | echo_piped -e "Grepped GNU: "

is_set FOO && trace FOO is set
is_set BAR && trace BAR is set
is_set NOT_SET && trace NOT_SET is set

is_empty FOO && trace FOO is empty
is_empty BAR && trace BAR is empty
is_empty NOT_SET && trace NOT_SET is empty