Rubocop: less complex methods

- Changed one thing: failed return value on printing the banner when
    no user or project was found.

lib/github_changelog_generator/parser.rb

@@ -9,20 +9,14 @@ module GitHubChangelogGenerator
     def self.parse_options
       options = get_default_options
 
-      parser_file = ParserFile.new options
-      parser_file.parse!
+      ParserFile.new(options).parse!
 
       parser = setup_parser(options)
       parser.parse!
 
-      if options[:user].nil? || options[:project].nil?
-        detect_user_and_project(options, ARGV[0], ARGV[1])
-      end
+      user_and_project_from_git(options)
 
-      if !options[:user] || !options[:project]
-        puts parser.banner
-        exit
-      end
+      abort(parser.banner) unless options[:user] && options[:project]
 
       print_options(options)
 
@@ -198,10 +192,17 @@ module GitHubChangelogGenerator
       options
     end
 
+    def self.user_and_project_from_git
+      if options[:user].nil? || options[:project].nil?
+        detect_user_and_project(options, ARGV[0], ARGV[1])
+      end
+    end
+
     # Detects user and project from git
     def self.detect_user_and_project(options, arg0 = nil, arg1 = nil)
       options[:user], options[:project] = user_project_from_option(arg0, arg1, options[:github_site])
-      if !options[:user] || !options[:project]
+      return if options[:user] && options[:project]
+
       if ENV["RUBYLIB"] =~ /ruby-debug-ide/
         options[:user] = "skywinder"
         options[:project] = "changelog_test"
@@ -210,7 +211,6 @@ module GitHubChangelogGenerator
         options[:user], options[:project] = user_project_from_remote(remote)
       end
     end
-    end
 
     # Try to find user and project name from git remote output
     #