如何将 ruby dsl chef 环境文件转换为 JSON 格式？

Question

How can I convert chef environment file which has Ruby DSL format to json? Is that possible?

I would like to use environment file attributes in a ruby script but I cannot parse it. Are there any way to parse these.rb files?

Thanks,

Tomszy

Answer 1

You can do it the same way Chef does:)

https://github.com/chef/chef/blob/master/lib/chef/environment.rb

require 'chef'
Chef::Config[:environment_path] = '/path/to/directory/with/rb_file'
env = Chef::Environmment.load_from_file('environment_name') # ! => not filename!
env.to_json

Answer 2

I've used this ruby script to convert ruby DSL files to JSON.

#!/usr/bin/env ruby
    
envfilename = '/path/to/environment.rb'
rolefilename = '/path/to/role.rb'

role = Chef::Role.new
role.name(File.basename(rolefilename, ".rb"))
role.from_file(rolefilename)
File.open(rolefilename.gsub(".rb", ".json"),"w") {|f| f.puts(role.to_json)}

env = Chef::Environment.new
env.name(File.basename(envfilename, ".rb"))
env.from_file(envfilename)
File.open(envfilename.gsub(".rb", ".json"),"w") {|f| f.puts(env.to_json)}

I got this script by modifying the code I found here: https://knife-zero.github.io/tips/use_ruby_dsl_for_envs_or_roles/