1 files changed, 49 insertions, 0 deletions
diff --git a/lib/gitlab/git/info_attributes.rb b/lib/gitlab/git/info_attributes.rb
new file mode 100644
index 00000000000..e79a440950b
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+++ b/lib/gitlab/git/info_attributes.rb
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+# Gitaly note: JV: not sure what to make of this class. Why does it use
+# the full disk path of the repository to look up attributes This is
+# problematic in Gitaly, because Gitaly hides the full disk path to the
+# repository from gitlab-ce.
+
+module Gitlab
+  module Git
+    # Parses gitattributes at `$GIT_DIR/info/attributes`
+    #
+    # Unlike Rugged this parser only needs a single IO call (a call to `open`),
+    # vastly reducing the time spent in extracting attributes.
+    #
+    # This class _only_ supports parsing the attributes file located at
+    # `$GIT_DIR/info/attributes` as GitLab doesn't use any other files
+    # (`.gitattributes` is copied to this particular path).
+    #
+    # Basic usage:
+    #
+    #     attributes = Gitlab::Git::InfoAttributes.new(some_repo.path)
+    #
+    #     attributes.attributes('README.md') # => { "eol" => "lf }
+    class InfoAttributes
+      delegate :attributes, :patterns, to: :parser
+
+      # path - The path to the Git repository.
+      def initialize(path)
+        @repo_path = File.expand_path(path)
+      end
+
+      def parser
+        @parser ||= begin
+          if File.exist?(attributes_path)
+            File.open(attributes_path, 'r') do |file_handle|
+              AttributesParser.new(file_handle)
+            end
+          else
+            AttributesParser.new("")
+          end
+        end
+      end
+
+      private
+
+      def attributes_path
+        @attributes_path ||= File.join(@repo_path, 'info/attributes')
+      end
+    end
+  end
+end