Deprecate legacy disk paths

Direct disk access is impossible on environments where components run in
their own container. There for constructing the path should not be done
except for exceptional cases.

One of the considerations, instead of logging, was to use Sentry. For
now I've chosen not to use this as the impact of this change is hard to
determine. Getting this in now will allow us to checkout the impact on
dev.gitlab.org and staging.

config/initializers/deprecations.rb

+deprecator = ActiveSupport::Deprecation.new('11.0', 'GitLab')
+
+if Gitlab.inc_controlled? || Rails.env.development?
+  ActiveSupport::Deprecation.deprecate_methods(Gitlab::GitalyClient::StorageSettings, :legacy_disk_path, deprecator: deprecator)
+end

lib/gitlab.rb

@@ -12,4 +12,12 @@ module Gitlab
   def self.staging?
     Gitlab.config.gitlab.url == 'https://staging.gitlab.com'
   end
+
+  def self.dev?
+    Gitlab.config.gitlab.url == 'https://dev.gitlab.org'
+  end
+
+  def self.inc_controlled?
+    dev? || staging? || com?
+  end
 end

lib/gitlab/git/repository.rb

@@ -75,9 +75,6 @@ module Gitlab
         end
       end
 
-      # Full path to repo
-      attr_reader :path
-
       # Directory name of repo
       attr_reader :name
 
@@ -96,14 +93,13 @@ module Gitlab
         @relative_path = relative_path
         @gl_repository = gl_repository
 
-        storage_path = Gitlab.config.repositories.storages[@storage].legacy_disk_path
         @gitlab_projects = Gitlab::Git::GitlabProjects.new(
           storage,
           relative_path,
           global_hooks_path: Gitlab.config.gitlab_shell.hooks_path,
           logger: Rails.logger
         )
-        @path = File.join(storage_path, @relative_path)
+
         @name = @relative_path.split("/").last
       end
 
@@ -111,6 +107,12 @@ module Gitlab
         path == other.path
       end
 
+      def path
+        @path ||= File.join(
+          Gitlab.config.repositories.storages[@storage].legacy_disk_path, @relative_path
+        )
+      end
+
       # Default branch in the repository
       def root_ref
         @root_ref ||= gitaly_migrate(:root_ref) do |is_enabled|
@@ -144,7 +146,7 @@ module Gitlab
             gitaly_repository_client.exists?
           else
             circuit_breaker.perform do
-              File.exist?(File.join(@path, 'refs'))
+              File.exist?(File.join(path, 'refs'))
             end
           end
         end
@@ -1000,7 +1002,7 @@ module Gitlab
             if is_enabled
               gitaly_repository_client.info_attributes
             else
-              attributes_path = File.join(File.expand_path(@path), 'info', 'attributes')
+              attributes_path = File.join(File.expand_path(path), 'info', 'attributes')
 
               if File.exist?(attributes_path)
                 File.read(attributes_path)