add --config to specify config file location (#394)

config/locales/en.yml

@@ -11,6 +11,7 @@ en:
         desc:
           all_locales: Do not expect key patterns to start with a locale, instead apply them to all
             locales implicitly.
+          config: Override config location
           confirm: Confirm automatically
           data_format: 'Data format: %{valid_text}.'
           keep_order: Keep the order of the keys

lib/i18n/tasks/base_task.rb

@@ -39,7 +39,8 @@ class BaseTask
       include Data
       include Stats
 
-      def initialize(config = {})
+      def initialize(config = {}, config_file: nil)
+        @config_override = config_file
         self.config = config || {}
       end
 

lib/i18n/tasks/cli.rb

@@ -34,7 +34,18 @@ def start(argv)
   end
 
   def run(argv)
-    I18n.with_locale(base_task.internal_locale) do
+    argv.each_with_index do |arg, i|
+      if ["--config", "-c"].include?(arg)
+        if File.exist?(argv[i+1])
+          @config_file = argv[i+1]
+          break
+        else
+          error "Config file doesn't exist: #{argv[i+1]}", 128
+        end
+      end
+    end
+
+    I18n.with_locale(base_task(config_file: @config_file).internal_locale) do
       name, *options = parse!(argv.dup)
       context.run(name, *options)
     end
@@ -52,8 +63,8 @@ def commands
 
   private
 
-  def base_task
-    @base_task ||= I18n::Tasks::BaseTask.new
+  def base_task(config_file: nil)
+    @base_task ||= I18n::Tasks::BaseTask.new(config_file: config_file)
   end
 
   def parse!(argv)

lib/i18n/tasks/command/commands/health.rb

@@ -9,7 +9,7 @@ module Health
         cmd :health,
             pos: '[locale ...]',
             desc: t('i18n_tasks.cmd.desc.health'),
-            args: %i[locales out_format]
+            args: %i[locales out_format config]
 
         def health(opt = {})
           forest = i18n.data_forest(opt[:locales])

lib/i18n/tasks/command/options/common.rb

@@ -28,6 +28,12 @@ module Common
             '--value VALUE',
             t('i18n_tasks.cmd.args.desc.value')
 
+        arg :config,
+            '-c',
+            '--config FILE',
+            t('i18n_tasks.cmd.args.desc.config')
+
+
         def arg_or_pos!(key, opts)
           opts[key] ||= opts[:arguments].try(:shift)
         end

lib/i18n/tasks/configuration.rb

@@ -20,7 +20,7 @@ def config
   ].freeze
 
   def file_config
-    file   = CONFIG_FILES.detect { |f| File.exist?(f) }
+    file   = @config_override || CONFIG_FILES.detect { |f| File.exist?(f) }
     # rubocop:disable Security/Eval
     config = file && YAML.load(eval(Erubi::Engine.new(File.read(file, encoding: 'UTF-8')).src))
     # rubocop:enable Security/Eval