# Practicing Pragmatism

## Ruby: lightweight templating

I had a TON of configuration files that I needed to deal with at work. After writing myself a handy tool to produce the “input” configuration details, I figured I'd just use some quick and dirty Ruby (and ERB) to write the necessary files:

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

template_file = "./template.toml.erb"
output_file_name = "./configuration/foo/conf-%{id_token}.toml"

# given a JSON array through STDIN of [ {conf}, {conf} ]
confs = JSON.parse(\$stdin.read, symbolize_names: true).map{|c| OpenStruct.new c }

# we can prepare the ERB template