shell script to read some config-looking data

read_config.sh

#!/bin/bash

function read_config()
{
	if [ -z "$2" ]
	then
		read -r -d '' $1
	else
		local input=""
		for inp in "${@:2}"
		do
			input="$input
$inp"
		done
		eval "$1=\"$input\""
	fi
	
}

function escape_regex()
{
	echo "${@}" | sed -r -e 's/([.(){}[\]+?$^\\*])/\\\1/g'
}

function config_get_key()
{
	grep -Eo -e "^\s*([^\"']\S*|\"[^\"]+\"|'[^']+')\s*[:=]" | sed -r -e "s/^\s*(\"|')?//" -e "s/(\"|')?\s*[:=]$//"
}

function config_get_value()
{
	sed -r -e "s/^\s*([^\"']\S*|\"[^\"]+\"|'[^']+)\s*[:=]\s*//" -e "s/,$//" -e "s/^(\"|')//" -e "s/(\"|')$//"
}

function config_get()
{
	local search=$(escape_regex "$2")
	echo "$1" | grep -E -e "^\s*($search|(\"|')$search\2)\s*[:=]" | config_get_value
}


function config_foreach()
{
	echo "$1" | while read line
	do
		key=$(echo "$line" | config_get_key)
		value=$(echo "$line" | config_get_value "$key")
		echo "@$key@$value@"
	done
}


read_config jsonish <<CONFIG
	foo: bar,
	"hello": "world"
	lol = wtf hello: lol
CONFIG
#read_config jsonish "foo: bar," "lol: wtf"

echo $jsonish

config_get "$jsonish" foo
config_get "$jsonish" hello
config_get "$jsonish" lol
echo 
config_foreach "$jsonish"