fix(cli): disable angular defaults when a rc file is provided

#4

Author: marionebl

readme.md

@@ -77,7 +77,7 @@ const report = lint(
 
 ### Recipes
 
-*   As a git `commitmsg` hook with husky
+*   As a `commitmsg` git-hook with ["husky"](https://git.io/JDwyQg)
 
 ```json
   {
@@ -99,13 +99,17 @@ const report = lint(
 
 ## Configuration
 
-`conventional-changelog-lint` allows detailed configuration via
+`conventional-changelog-lint` is configured via
 `.conventional-changelog-lintrc` and shareable configuration.
-By default it will use the
+
+When no `.conventional-changelog-lintrc` is found it will use the
 [angular](https://github.com/marionebl/conventional-changelog-lint-config-angular#rules)
 shareable config.
 See the documentation there for default rules.
 
+When a `.conventional-changelog-lintrc` is found it will **not** load any preset
+unless specified via [extends](#extends) configuration.
+
 ### extends
 
 ```js
@@ -150,8 +154,9 @@ for details
   }
 }
 ```
+
 Rules applicable to the linted commit messages.
-By default all rules are disabled via a level of 0.
+By default all rules are turned off via a level of 0.
 They can be enabled by shareable configuration,
 such as the
 [angular config](https://github.com/marionebl/conventional-changelog-lint-config-angular),

source/library/get-configuration.js

@@ -15,9 +15,18 @@ const defaultSettings = {
 };
 
 export default async (name = defaultName, settings = defaultSettings, seed = {}) => {
+	// Obtain config from .rc files
+	const userConfig = rc(name, settings.defaults);
+
+	// Use the default extends config if there is no userConfig
+	// See https://git.io/vwT1C for reference
+	const applicableDefaults = userConfig ?
+		{} :
+		defaults;
+
 	// Merge passed config with file based options
-	const config = merge(rc(name, settings.defaults), seed);
-	const opts = merge({}, defaults, pick(config, 'extends'));
+	const config = merge(userConfig, seed);
+	const opts = merge({}, applicableDefaults, pick(config, 'extends'));
 
 	// Resolve extends key
 	const extended = resolveExtends(opts, settings.prefix);