Add platforms schema command

inspec-core.gemspec

@@ -22,7 +22,7 @@ Gem::Specification.new do |spec|
 
   spec.required_ruby_version = '>= 2.3'
 
-  spec.add_dependency 'train-core', '~> 1.4', '>= 1.4.35'
+  spec.add_dependency 'train-core', '~> 1.4', '>= 1.4.37'
   spec.add_dependency 'thor', '~> 0.20'
   spec.add_dependency 'json', '>= 1.8', '< 3.0'
   spec.add_dependency 'method_source', '~> 0.8'

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', '>= 1.4.37'
   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

test/functional/inspec_schema_test.rb

@@ -0,0 +1,21 @@
+# encoding: utf-8
+
+require 'functional/helper'
+
+describe 'inspec schema' do
+  include FunctionalHelper
+
+  describe 'extracting the platforms schema export' do
+    it 'can execute a platforms schema command' do
+      out = inspec('schema platforms')
+      out.stderr.must_equal ''
+      out.exit_status.must_equal 0
+      data = JSON.parse(out.stdout)
+      data.class.must_equal Array
+      data.size.must_be(:>, 1)
+      data[0]['name'].must_equal 'aix'
+      families = ['aix', 'unix', 'os']
+      data[0]['families'].must_equal families
+    end
+  end
+end