Override_file

.gitignore

@@ -0,0 +1 @@
+pkg/*

lib/reciper/helpers.rb

@@ -4,6 +4,9 @@ module Reciper
   class NoTestOutput < RuntimeError
   end
 
+  class NoFileToBeOverriden < RuntimeError
+  end
+
   module Helpers
     def copy_file(filename, options={})
       destination_dir = @ruby_app_path + "/" + (options[:to] || "")
@@ -14,7 +17,13 @@ def copy_file(filename, options={})
 
       FileUtils.cp(@recipe_path + "/" + filename, destination_dir)
 
-      @operations << [:copy, (options[:to] || "") + filename]
+      new_filename = options[:as] || filename
+
+      if(options[:as])
+        FileUtils.mv(destination_dir + "/" + filename, destination_dir + "/" + new_filename)
+      end
+
+      @operations << [:copy, (options[:to] || "") + new_filename]
     end
 
     def run_tests(options={})
@@ -71,6 +80,8 @@ def rollback
           spawn(operation[1]) if operation[1]
 
           Process.wait
+        elsif operation[0] == :override_file
+          FileUtils.cp(operation[1], @ruby_app_path + "/" + operation[2])
         end
       end
     end
@@ -89,5 +100,21 @@ def run_command(command, rollback_command=nil)
         false
       end
     end
+
+    def override_file(file, file_to_be_overriden)
+      Dir.chdir(@ruby_app_path) do
+        fail NoFileToBeOverriden unless File.exists?(file_to_be_overriden)
+
+        FileUtils.mkdir_p("/tmp/reciper")
+        filename = File.basename(file_to_be_overriden)
+        tmp_file = "/tmp/reciper/#{filename}"
+
+        FileUtils.cp(file_to_be_overriden, tmp_file)
+
+        @operations << [:override_file, tmp_file, file_to_be_overriden]
+      end
+
+      FileUtils.cp(@recipe_path + "/" + file, @ruby_app_path + "/" + file_to_be_overriden)
+    end
   end
 end

spec/fixtures/ruby_app/README

@@ -0,0 +1 @@
+some content

spec/reciper/helpers_spec.rb

@@ -33,6 +33,16 @@
       FileUtils.rm("spec/fixtures/ruby_app/lib/file.rb")
     end
 
+    it "copies the file with the name as in defined in as" do
+      File.exists?("spec/fixtures/ruby_app/file.rb").should_not be
+
+      copy_file("file.rb", :as => "another_file.rb")
+
+      File.exists?("spec/fixtures/ruby_app/another_file.rb").should be
+
+      FileUtils.rm("spec/fixtures/ruby_app/another_file.rb")
+    end
+
     it "if the dir doesn't exists, create it" do
       File.exists?("spec/fixtures/ruby_app/lib/file.rb").should_not be
 
@@ -187,5 +197,46 @@ class MyClass
 
       rollback
     end
+
+    it "runs the rollback command when the operation is override_file" do
+      begin
+        FileUtils.cp("spec/fixtures/ruby_app/README", "/tmp/README")
+        FileUtils.rm("spec/fixtures/ruby_app/README")
+
+        File.exists?("spec/fixtures/ruby_app/README").should_not be
+
+        @operations = [[:override_file, "/tmp/README", "README"]]
+
+        rollback
+
+        File.exists?("spec/fixtures/ruby_app/README").should be
+      ensure
+        FileUtils.cp("/tmp/README", "spec/fixtures/ruby_app/README") unless File.exists?("spec/fixtures/ruby_app/README")
+      end
+    end
+  end
+
+  describe ".override_file" do
+    it "overrides the file with another file" do
+      FileUtils.cp("spec/fixtures/ruby_app/README", "/tmp/README")
+
+      File.read("spec/fixtures/ruby_app/README").should == "some content"
+
+      override_file("README", "README")
+
+      File.read("spec/fixtures/ruby_app/README").should == ""
+
+      FileUtils.mv("/tmp/README", "spec/fixtures/ruby_app/README")
+    end
+
+    it "adds the operation to operations array" do
+      FileUtils.cp("spec/fixtures/ruby_app/README", "/tmp/README")
+
+      override_file("README", "README")
+
+      @operations.should include([:override_file, "/tmp/reciper/README", "README"])
+
+      FileUtils.mv("/tmp/README", "spec/fixtures/ruby_app/README")
+    end
   end
 end