ini-parser.bash

#
# Copyright (c) 2017 Gaël PORTAY
#
# Permission is hereby granted, free of charge, to any person obtaining a copy
# of this software and associated documentation files (the "Software"), to deal
# in the Software without restriction, including without limitation the rights
# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
# copies of the Software, and to permit persons to whom the Software is
# furnished to do so, subject to the following conditions:
#
# The above copyright notice and this permission notice shall be included in
# all copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
# SOFTWARE.
#
# Widely inspired by http://theoldschooldevops.com/2008/02/09/bash-ini-parser/
#

ini_parser() {
	local ifs=$IFS

	# Read file content into variable
	ini="$(<"$1")"

	# Convert from scalar to line-array
	IFS=$'\n'
	ini=( ${ini} )

	# Translate ini section into shell function
	ini=( ${ini[*]/#[/:;\}$'\n'ini_} )
	ini=( ${ini[*]/%]/\(\) \{} )

	# Move the two first elements to end
	ini[${#ini[*]} + 1]="${ini[0]}"
	ini[0]=

	# Evaluate translation
	eval "$(echo "${ini[*]}")"

	IFS=$ifs
}