Add XDG_CONFIG_HOME support

.editorconfig

@@ -0,0 +1,9 @@
+root = true
+
+[*]
+charset = utf-8
+end_of_line = lf
+indent_size = 2
+indent_style = space
+insert_final_newline = true
+trim_trailing_whitespace = true

lib/github/api.rb

@@ -9,7 +9,9 @@
 
 module Github
   class Api
-    HOST_FILE = '~/.github-repos/host'.freeze
+    LEGACY_HOST_FILE = '~/.github-repos/host'.freeze
+    DEFAULT_HOST = 'https://api.github.com'.freeze
+    HOST_FILE_NAME = "host".freeze
 
     def search_repos(query)
       path = "/search/repositories?q=#{escape(query)}"
@@ -18,15 +20,20 @@ def search_repos(query)
     end
 
     class << self
+      def host_storage
+        host_path = ConfigPath.new(HOST_FILE_NAME, LEGACY_HOST_FILE).get
+        LocalStorage.new(host_path)
+      end
+
       def configure_host(host)
-        LocalStorage.new(HOST_FILE).put("#{host}/api/v3")
+        host_storage.put("#{host}/api/v3")
       end
     end
 
     private
 
     def host
-      @host ||= (LocalStorage.new(HOST_FILE).get || 'https://api.github.com')
+      @host ||= (Api.host_storage.get || DEFAULT_HOST)
     end
 
     def escape(str)

lib/github/authorization.rb

@@ -7,7 +7,8 @@ class Authorization
     class NotAuthorizedError < StandardError; end
 
     AUTHORIZATION_URL = 'https://github.com/settings/tokens/new?description=Github%20Repos&scopes=repo'.freeze
-    CREDENTIALS = '~/.github-repos/config'.freeze
+    LEGACY_CREDENTIALS = '~/.github-repos/config'.freeze
+    CREDENTIALS_FILE_NAME = "config".freeze
 
     attr_reader :username, :token
 
@@ -37,7 +38,8 @@ def stored?
       private
 
       def credentials
-        LocalStorage.new(CREDENTIALS)
+        config_path = ConfigPath.new(CREDENTIALS_FILE_NAME, LEGACY_CREDENTIALS).get
+        LocalStorage.new(config_path)
       end
     end
   end

lib/github/config_path.rb

@@ -0,0 +1,23 @@
+module Github
+  class ConfigPath
+    APP_NAME = "github-repos"
+
+    # @param [String] target
+    # @param [String] legacy_path
+    def initialize(target, legacy_path = nil)
+      @target = target
+      @legacy_file = legacy_path
+    end
+
+    def get
+      if @legacy_file
+        # Fallback to legacy behavior if legacy path exists
+        legacy_file = File.expand_path(@legacy_file)
+        return legacy_file if File.file?(legacy_file)
+      end
+
+      xdg_config_home = ENV['XDG_CONFIG_HOME'] || File.join(ENV['HOME'], '.config')
+      File.join(xdg_config_home, APP_NAME, @target)
+    end
+  end
+end

lib/local_storage.rb

@@ -6,6 +6,7 @@
 class LocalStorage
   attr_reader :location
 
+  # @param [String] filepath
   def initialize(filepath)
     @location = File.expand_path(filepath)
     create_parent_dir