add cmd for executing calls against the inspec api

lib/inspec/cli.rb

@@ -116,21 +116,13 @@ class Inspec::InspecCLI < Inspec::BaseCLI # rubocop:disable Metrics/ClassLength
   desc 'detect', 'detect the target OS'
   target_options
   def detect
-    diagnose
-
-    rel = File.join(File.dirname(__FILE__), *%w{.. utils detect.rb})
-    detect_util = File.expand_path(rel)
-    # exits on execution:
-    runner = Inspec::Runner.new(opts)
-    profile = Inspec::Profile.for_target(detect_util, opts)
-    runner.add_profile(profile)
-    exit runner.run
-  rescue RuntimeError => e
-    puts e.message
+    options_json[:command] = 'os.params'
+    shell_func
   end
 
   desc 'shell', 'open an interactive debugging shell'
   target_options
+  option :command, aliases: :c
   option :format, type: :string, default: Inspec::NoSummaryFormatter, hide: true
   def shell_func
     diagnose
@@ -138,8 +130,16 @@ class Inspec::InspecCLI < Inspec::BaseCLI # rubocop:disable Metrics/ClassLength
     o[:logger] = Logger.new(STDOUT)
     o[:logger].level = get_log_level(o.log_level)
 
-    runner = Inspec::Runner.new(o)
-    Inspec::Shell.new(runner).start
+    if o[:command].nil?
+      runner = Inspec::Runner.new(o)
+      return Inspec::Shell.new(runner).start
+    else
+      opts[:test_collector] = 'mock'
+      runner = Inspec::Runner.new(opts)
+      res = runner.create_context.load(o[:command])
+      jres = res.respond_to?(:to_json) ? res.to_json : JSON.dump(res)
+      puts jres
+    end
   rescue RuntimeError => e
     puts e.message
   end

lib/resources/os.rb

@@ -25,6 +25,15 @@ module Inspec::Resources
       inspec.backend.os[name]
     end
 
+    def params
+      {
+        name: inspec.backend.os[:name],
+        family: inspec.backend.os[:family],
+        release: inspec.backend.os[:release],
+        arch: inspec.backend.os[:arch],
+      }
+    end
+
     def to_s
       'Operating System Detection'
     end

lib/utils/detect.rb

@@ -1,15 +0,0 @@
-# encoding: utf-8
-# Copyright 2015, Vulcano Security GmbH
-# author: Christoph Hartmann
-# author: Dominik Richter
-# Tiny test file to return OS info of the tested node
-
-# print OS detection infos
-conf = {
-  name:    os[:name],
-  family:  os[:family],
-  release: os[:release],
-  arch:    os[:arch],
-}
-puts JSON.dump(conf)
-exit 0

test/functional/inspec_test.rb

@@ -20,6 +20,29 @@ describe 'command tests' do
     end
   end
 
+  describe 'cmd' do
+    it 'can run arbitrary ruby' do
+      x = rand
+      y = rand
+      out = inspec("shell -c '#{x} + #{y}'")
+      out.stderr.must_equal ''
+      out.exit_status.must_equal 0
+      j = JSON.load(out.stdout)
+      j.must_equal x+y
+    end
+
+    it 'retrieves resources in JSON' do
+      out = inspec("shell -c 'os.params'")
+      out.stderr.must_equal ''
+      out.exit_status.must_equal 0
+      j = JSON.load(out.stdout)
+      j.keys.must_include 'name'
+      j.keys.must_include 'family'
+      j.keys.must_include 'arch'
+      j.keys.must_include 'release'
+    end
+  end
+
   describe 'version' do
     it 'provides the version number on stdout' do
       out = inspec('version')