fix: local overcommit file merges with existing .overcommit.yml file

lib/overcommit/configuration_loader.rb

@@ -70,11 +70,9 @@ def load_repo_config
     # Loads a configuration, ensuring it extends the default configuration.
     def load_file(file, local_file = nil)
       overcommit_config = self.class.load_from_file(file, default: false, logger: @log)
-      if local_file
-        local_config = self.class.load_from_file(local_file, default: false, logger: @log)
-      end
+      local_config = self.class.load_from_file(local_file, default: false, logger: @log) if local_file
       config = self.class.default_configuration.merge(overcommit_config)
-      config = self.class.default_configuration.merge(local_config) if local_config
+      config = config.merge(local_config) if local_config
 
       if @options.fetch(:verify) { config.verify_signatures? }
         verify_signatures(config)

spec/overcommit/configuration_loader_spec.rb

@@ -58,11 +58,32 @@
       end
     end
 
-    context 'when repo contains a local configuration file' do
+    context 'when repo only contains a repo level configuration file' do
       let(:config_contents) { <<-CFG }
-        plugin_directory: 'some-directory'
+        PreCommit:
+          Rubocop:
+            enabled: true
       CFG
 
+      around do |example|
+        repo do
+          File.open('.overcommit.yml', 'w') { |f| f.write(config_contents) }
+          example.run
+        end
+      end
+
+      it 'includes default settings' do
+        subject
+        subject.for_hook('CapitalizedSubject', 'CommitMsg').should include('enabled' => true)
+      end
+
+      it 'includes .overwrite.yml configs' do
+        subject
+        subject.for_hook('Rubocop', 'PreCommit').should include('enabled' => true)
+      end
+    end
+
+    context 'when repo also contains a local configuration file' do
       let(:local_config_contents) { <<-CFG }
         plugin_directory: 'some-different-directory'
       CFG
@@ -75,28 +96,31 @@
         end
       end
 
-      it 'loads the file' do
-        Overcommit::ConfigurationLoader.any_instance.
-          should_receive(:load_file).
-          with(File.expand_path('.overcommit.yml'), File.expand_path('.local-overcommit.yml'))
+      let(:config_contents) { <<-CFG }
+        PreCommit:
+          ScssLint:
+            enabled: true
+      CFG
+
+      let(:local_config_contents) { <<-CFG }
+        PreCommit:
+          Rubocop:
+            enabled: true
+      CFG
+
+      it 'includes default settings' do
         subject
+        subject.for_hook('CapitalizedSubject', 'CommitMsg').should include('enabled' => true)
       end
 
-      it 'merges each loaded file with the default configuration' do
-        subject.plugin_directory.should == File.expand_path('some-different-directory')
+      it 'includes .overwrite.yml configs' do
+        subject
+        subject.for_hook('ScssLint', 'PreCommit').should include('enabled' => true)
       end
 
-      context 'and the configuration file contains a hook with no `enabled` option' do
-        let(:config_contents) { <<-CFG }
-          PreCommit:
-            ScssLint:
-              command: ['bundle', 'exec', 'scss-lint']
-        CFG
-
-        it 'displays a warning' do
-          subject
-          output.string.should =~ /PreCommit::ScssLint.*not.*enabled/i
-        end
+      it 'includes .local-overwrite.yml configs' do
+        subject
+        subject.for_hook('Rubocop', 'PreCommit').should include('enabled' => true)
       end
     end
   end