Add stack probe for detecting when run as CLI by Thor

Signed-off-by: Clinton Wolfe <clintoncwolfe@gmail.com>

lib/inspec/utils/telemetry/run_context.rb

@@ -0,0 +1,34 @@
+module Inspec
+  module Telemetry
+    # Guesses the run context of InSpec - how were we invoked?
+    class RunContextProbe
+      def self.guess_run_context
+        stack = caller_locations(4)
+        return "cli" if run_by_thor?(stack)
+        # audit-cookbook
+        # kitchen-inspec
+        # "unknown"
+      end
+
+
+      def self.run_by_thor?(stack)
+        stack_match(stack: stack[-14..-9], path: "thor/command", label: "run") &&
+        stack_match(stack: stack[-14..-9], path: "thor/invocation", label: "invoke_command")
+      end
+
+      def self.stack_match(stack: nil, label: nil, path: nil)
+        stack.any? do |frame|
+          if label && path
+            frame.label == label && frame.absolute_path.include?(path)
+          elsif label
+            frame.label == label
+          elsif path
+            frame.absolute_path.include?(path)
+          else
+            false
+          end
+        end
+      end
+    end
+  end
+end