Update gems, drop i18n gem and implement basic replacement

lib/i18n.rb

@@ -0,0 +1,102 @@
+# The I18n gem is a real pain to work with when packaging with Ocra(n)
+# and we're not using its 'advanced' features so emulate its API here.
+
+require "yaml"
+
+class I18n
+  class InvalidLocale < StandardError
+  end
+
+  @locale = :en
+  @default_locale = :en
+  @load_path = []
+
+  @translations = {}
+
+  def self.load_path
+    @load_path
+  end
+
+  def self.default_locale
+    @default_locale.to_sym
+  end
+
+  def self.default_locale=(locale)
+    @default_locale = locale.to_s
+  end
+
+  def self.locale
+    @locale.to_sym
+  end
+
+  def self.locale=(locale)
+    locale = locale.to_s
+
+    raise InvalidLocale unless valid_locale?(locale)
+
+    @locale = locale
+  end
+
+  def self.t(symbol)
+    return symbol.to_s unless valid_locale?(@locale)
+
+    @translations[@locale] || load_locale(@locale)
+
+    translations = @translations[@locale]
+    return translations[symbol] if translations
+
+    translation = @translations.dig(@default_locale, symbol)
+    return translation if translation
+
+    return symbol.to_s
+  end
+
+  def self.available_locales
+    @load_path.flatten.map { |f| File.basename(f, ".yml").to_s.downcase.to_sym }
+  end
+
+  private
+  def self.load_locale(locale)
+    locale = locale.to_s
+
+    return if @translations[locale] && !@translations[locale].empty?
+
+    if (file = valid_locale?(locale))
+      yaml = YAML.load_file(file)
+
+      raise InvalidLocale unless yaml[locale]
+
+      key = ""
+      hash = yaml[locale]
+      hash.each_pair do |key, v|
+        if v.is_a?(String)
+          @translations[locale] ||= {}
+          @translations[locale][key.to_sym] = v
+        else
+          load_locale_part(locale, key, v)
+        end
+      end
+    end
+  end
+
+  def self.load_locale_part(locale, key, part)
+    locale = locale.to_s
+
+    part.each_pair do |k, v|
+      if v.is_a?(String)
+        @translations[locale] ||= {}
+        @translations[locale]["#{key}.#{k}".to_sym] = v
+      else
+        load_locale_part(locale, "#{key}.#{k}", v)
+      end
+    end
+  end
+
+  def self.valid_locale?(locale)
+    locale = locale.to_s
+
+    @load_path.flatten.find do |file|
+      File.basename(file, ".yml").to_s.downcase.strip == locale
+    end
+  end
+end