Add platforms schema command.

Signed-off-by: Jared Quick <jquick@chef.io>

Gemfile

@@ -2,6 +2,8 @@
 source 'https://rubygems.org'
 gemspec name: 'inspec'
 
+gem 'train', :git => 'https://github.com/inspec/train.git', :branch => 'jq/add_platforms_export'
+
 if Gem::Version.new(RUBY_VERSION) < Gem::Version.new('2.2.2')
   gem 'json', '~> 1.8'
   gem 'rack', '< 2.0'

inspec.gemspec

@@ -26,7 +26,7 @@ Gem::Specification.new do |spec|
 
   spec.required_ruby_version = '>= 2.3'
 
-  spec.add_dependency 'train', '~> 1.4', '>= 1.4.35'
+  # spec.add_dependency 'train', '~> 1.4', '>= 1.4.35'
   spec.add_dependency 'thor', '~> 0.20'
   spec.add_dependency 'json', '>= 1.8', '< 3.0'
   spec.add_dependency 'method_source', '~> 0.8'

lib/inspec/schema.rb

@@ -200,18 +200,31 @@ class Schema
       },
     }.freeze
 
+    # using a proc here so we can lazy load it when we need
+    PLATFORMS = lambda do
+      require 'train'
+      Train.create('mock').connection
+      Train::Platforms.export
+    end
+
     LIST = {
       'exec-json' => EXEC_JSON,
       'exec-jsonmin' => EXEC_JSONMIN,
+      'platforms' => PLATFORMS,
     }.freeze
 
     def self.names
       LIST.keys
     end
 
     def self.json(name)
-      v = LIST[name] ||
-          raise("Cannot find schema #{name.inspect}.")
+      if !LIST.key?(name)
+        raise("Cannot find schema #{name.inspect}.")
+      elsif LIST[name].is_a?(Proc)
+        v = LIST[name].call
+      else
+        v = LIST[name]
+      end
       JSON.dump(v)
     end
   end