#!/bin/bash
# core/license - software license support
#
# The `core/license` library provides functions to display the licensing
# information for the package.  The actual license details are encoded in
# the `core/license-parts` library.

set -e

lib_load 'core/license-parts'


######
# Internal Functions

# license_check_func() - Checks for a function that has the same root name as
# its caller and with a suffix of `_print`.  Those functions are provided by
# the `core/license-parts` library and will only be present when the relevant
# portion of the license was provided by the developer.
license_check_func() {
	local name="${FUNCNAME[1]}_print"
	is_function "$name" || error "$name: license function not found"
}

######
# Public Interface

license_full_blurb() {
	echo "Run '$script_name --license full' to read the full license."
}

# license_blurb() - Prints a short license message for the package.
license_blurb() {
	license_check_func

	local package_year=${package_build_date%%-*}
	echo "Copyright (C) 2016-$package_year  $package_author"
	license_blurb_print

	echo "Run '$script_name --license warranty' for warranty details."
	license_full_blurb
}

# license_warranty() - Prints the warranty information for the package.
license_warranty() {
	license_check_func
	license_warranty_print
	license_full_blurb
}

# license_full() - Prints the full license for the package.
license_full() {
	license_check_func
	local tmp=$(cmd_tempfile)
	license_full_print >$tmp
	${PAGER:-less} "$tmp"
}