Fix bug if default task is not found

lib/thor.rb

@@ -294,8 +294,13 @@ def dispatch(meth, given_args, given_opts, config) #:nodoc:
         elsif @default_task && @default_task_allows_args
           meth = @default_task
           task = all_tasks[normalize_task_name(meth)]
-          given_args = original_args # Restore original arguments (meth has been popped above)
-          args, opts = Thor::Options.split(given_args)
+          if task
+            given_args = original_args # Restore original arguments (meth has been popped above)
+            args, opts = Thor::Options.split(given_args)
+          else # Default task not found
+            args, opts = given_args, nil
+            task = Thor::DynamicTask.new(meth)
+          end
         else
           args, opts = given_args, nil
           task = Thor::DynamicTask.new(meth)

lib/thor/task.rb

@@ -1,3 +1,5 @@
+require 'pp'
+
 class Thor
   class Task < Struct.new(:name, :description, :long_description, :usage, :options)
     FILE_REGEXP = /^#{Regexp.escape(File.dirname(__FILE__))}/
@@ -106,7 +108,9 @@ def initialize(name, options=nil)
     end
 
     def run(instance, args=[])
-      if (instance.methods & [name.to_s, name.to_sym]).empty?
+      if name == '' # Missing task -- probably misnamed default task
+        instance.class.handle_no_task_error(instance.class.default_task)
+      elsif (instance.methods & [name.to_s, name.to_sym]).empty?
         super
       else
         instance.class.handle_no_task_error(name)

spec/fixtures/script.thor

@@ -208,5 +208,23 @@ class WithArgsOnDefaultTask < Thor
   def example_default_task(*args)
     ["default task", options, args]
   end
+
+  class WithBadDefaultTask < Thor
+    default_task :bad_default_task
+
+    banner "MyScript does really cool stuff"
+
+    map "-T" => :animal, ["-f", "--foo"] => :foo
+
+    desc "zoo", "zoo around"
+    def zoo
+      "zoo"
+    end
+
+    desc "example_default_task", "example!"
+    method_options :with => :string
+    def example_default_task(*args)
+      ["default task", options, args]
+    end
 end
 

spec/thor_spec.rb

@@ -132,6 +132,12 @@
     end
   end
 
+  describe "#bad_default_task" do
+    it "calls method missing if no command is specified" do
+      BadDefaultTask.start([]).should == [nil, []]
+    end
+  end
+
   describe "#map" do
     it "calls the alias of a method if one is provided" do
       MyScript.start(["-T", "fish"]).should == ["fish"]