Support for global config

README.md

@@ -143,6 +143,8 @@ cannot be found by ascending the current working directory (i.e., against a
 temporary file buffer in your editor), you can specify the config location with
 `--config path/to/.standard.yml`.
 
+You can also set a global configuration by creating a `.standard_global.yml` in your home directory.
+
 ## What you might do if you're REALLY clever
 
 Because StandardRB is essentially a wrapper on top of

lib/standard/loads_yaml_config.rb

@@ -7,16 +7,36 @@ module Standard
   class LoadsYamlConfig
     def initialize
       @parses_cli_option = ParsesCliOption.new
+      @global_config_dir = ENV["HOME"]
     end
 
     def call(argv, search_path)
       yaml_path = @parses_cli_option.call(argv, "--config") ||
         FileFinder.new.call(".standard.yml", search_path)
-      construct_config(yaml_path, load_standard_yaml(yaml_path))
+
+      # global config
+      global_yaml_path = FileFinder.new.call(".standard_global.yml", @global_config_dir)
+
+      standard_yaml = resolve_config(load_standard_yaml(global_yaml_path), load_standard_yaml(yaml_path))
+      construct_config(yaml_path, standard_yaml)
     end
 
     private
 
+    def resolve_config(global_config, custom_config)
+      keys = %w[ruby_version fix format parallel default_ignores]
+      config = global_config.slice(*keys).merge(custom_config.slice(*keys))
+
+      return config unless global_config["ignore"] || custom_config["ignore"]
+      # merge `ignore`
+      config["ignore"] = arrayify(custom_config["ignore"]).to_set
+        .merge(arrayify(global_config["ignore"]).to_set)
+        .to_a
+        .compact
+
+      config
+    end
+
     def load_standard_yaml(yaml_path)
       if yaml_path
         YAML.load_file(yaml_path) || {}

test/fixture/config/t/.standard.yml

@@ -0,0 +1,9 @@
+fix: false
+ruby_version: 2.2
+ignore:
+  - hello/**/*
+  - neat/cool.rb:
+    - Fake/Hi
+    - Fake/Lol
+  - nest/file.rb:
+    - Fake/T

test/fixture/config/t/.standard_global.yml

@@ -0,0 +1,10 @@
+fix: true
+parallel: true
+format: progress
+ruby_version: 1.8.7
+default_ignores: false
+ignore:
+  - monkey/**/*
+  - neat/cool.rb:
+    - Fake/Lol
+    - Fake/Kek

test/fixture/config/u/.standard_global.yml

@@ -0,0 +1,11 @@
+fix: true
+parallel: true
+format: progress
+ruby_version: 1.8.7
+default_ignores: false
+ignore:
+  - monkey/**/*
+  - neat/cool.rb:
+    - Fake/Lol
+    - Fake/Kek
+

test/standard/builds_config_test.rb

@@ -92,6 +92,55 @@ def test_specified_standard_yaml_raises
     assert_match(/Configuration file ".*fake\.file" not found/, err.message)
   end
 
+  def test_global_standard_yaml
+    loads_yaml_config = @subject.instance_variable_get(:@loads_yaml_config)
+    assert_equal ENV["HOME"], loads_yaml_config.instance_variable_get(:@global_config_dir)
+
+    loads_yaml_config.instance_variable_set(:@global_config_dir, path("test/fixture/config/u"))
+    result = @subject.call([], path("test/fixture/config/u"))
+
+    assert_equal DEFAULT_OPTIONS.merge(
+      auto_correct: true,
+      safe_auto_correct: true,
+      parallel: true,
+      formatters: [["progress", nil]]
+    ), result.rubocop_options
+
+    expected_config = RuboCop::ConfigStore.new.tap do |config_store|
+      config_store.options_config = path("config/ruby-1.8.yml")
+      options_config = config_store.instance_variable_get("@options_config")
+      options_config["AllCops"]["Exclude"] |= [path("test/fixture/config/u/monkey/**/*")]
+      options_config["Fake/Lol"] = {"Exclude" => [path("test/fixture/config/u/neat/cool.rb")]}
+      options_config["Fake/Kek"] = {"Exclude" => [path("test/fixture/config/u/neat/cool.rb")]}
+    end.for("").to_h
+    assert_equal expected_config, result.rubocop_config_store.for("").to_h
+  end
+
+  def test_specified_standard_yaml_overrides_global
+    loads_yaml_config = @subject.instance_variable_get(:@loads_yaml_config)
+    assert_equal ENV["HOME"], loads_yaml_config.instance_variable_get(:@global_config_dir)
+
+    loads_yaml_config.instance_variable_set(:@global_config_dir, path("test/fixture/config/t"))
+    result = @subject.call([], path("test/fixture/config/t"))
+
+    assert_equal DEFAULT_OPTIONS.merge(
+      safe_auto_correct: false,
+      parallel: true,
+      formatters: [["progress", nil]]
+    ), result.rubocop_options
+
+    expected_config = RuboCop::ConfigStore.new.tap do |config_store|
+      config_store.options_config = path("config/ruby-2.2.yml")
+      options_config = config_store.instance_variable_get("@options_config")
+      options_config["AllCops"]["Exclude"] |= [path("test/fixture/config/t/hello/**/*"), path("test/fixture/config/t/monkey/**/*")]
+      options_config["Fake/Hi"] = {"Exclude" => [path("test/fixture/config/t/neat/cool.rb")]}
+      options_config["Fake/Lol"] = {"Exclude" => [path("test/fixture/config/t/neat/cool.rb")]}
+      options_config["Fake/T"] = {"Exclude" => [path("test/fixture/config/t/nest/file.rb")]}
+      options_config["Fake/Kek"] = {"Exclude" => [path("test/fixture/config/t/neat/cool.rb")]}
+    end.for("").to_h
+    assert_equal expected_config, result.rubocop_config_store.for("").to_h
+  end
+
   private
 
   def config_store(config_root = nil, rubocop_yml = "config/base.yml", ruby_version = RUBY_VERSION)