Converts JSON configuration to environment variable configuration

json_to_env.rb

#!/usr/bin/env ruby
require 'json'

=begin

This converts a Mattermost JSON configuration file to environment variables
More information available here: https://docs.mattermost.com/administration/config-settings.html

To use, download this script and then pipe the config.json file into it, like this:

$ cat /opt/mattermost/config/config.json | json_to_env.rb

=end

def convert_to_env(json, prefix_string)
	return_string = ''
	json.each do |k, v|

		if v.is_a?(Hash)
			prefix_string += '_' + k.upcase
			return_string += convert_to_env(v, prefix_string)
		else
			return_string += "#{prefix_string}_#{k.upcase}=\"#{v}\"\n"
		end
	end

	return_string
end

json_string = ARGF.read

json = JSON::parse(json_string)

puts convert_to_env(json, 'MM')