1 files changed, 27 insertions, 0 deletions
diff --git a/railties/lib/vendor/thor-0.11.3/lib/thor/error.rb b/railties/lib/vendor/thor-0.11.3/lib/thor/error.rb
new file mode 100644
index 0000000000..c846e9ce74
--- /dev/null
+++ b/railties/lib/vendor/thor-0.11.3/lib/thor/error.rb
@@ -0,0 +1,27 @@
+class Thor
+  # Thor::Error is raised when it's caused by the user invoking the task and
+  # only errors that inherit from it are rescued.
+  #
+  # So, for example, if the developer declares a required argument after an
+  # option, it should raise an ::ArgumentError and not ::Thor::ArgumentError,
+  # because it was caused by the developer and not the "final user".
+  #
+  class Error < StandardError #:nodoc:
+  end
+
+  # Raised when a task was not found.
+  #
+  class UndefinedTaskError < Error #:nodoc:
+  end
+
+  # Raised when a task was found, but not invoked properly.
+  #
+  class InvocationError < Error #:nodoc:
+  end
+
+  class RequiredArgumentMissingError < InvocationError #:nodoc:
+  end
+
+  class MalformattedArgumentError < InvocationError #:nodoc:
+  end
+end