1 files changed, 52 insertions, 0 deletions
diff --git a/lib/gitlab/ci/external/processor.rb b/lib/gitlab/ci/external/processor.rb
new file mode 100644
index 00000000000..76cf3ce89f9
--- /dev/null
+++ b/lib/gitlab/ci/external/processor.rb
@@ -0,0 +1,52 @@
+# frozen_string_literal: true
+
+module Gitlab
+  module Ci
+    module External
+      class Processor
+        FileError = Class.new(StandardError)
+
+        def initialize(values, project, sha)
+          @values = values
+          @external_files = Gitlab::Ci::External::Mapper.new(values, project, sha).process
+          @content = {}
+        end
+
+        def perform
+          return values if external_files.empty?
+
+          external_files.each do |external_file|
+            validate_external_file(external_file)
+            @content.deep_merge!(content_of(external_file))
+          end
+
+          append_inline_content
+          remove_include_keyword
+        end
+
+        private
+
+        attr_reader :values, :external_files, :content
+
+        def validate_external_file(external_file)
+          unless external_file.valid?
+            raise FileError, external_file.error_message
+          end
+        end
+
+        def content_of(external_file)
+          Gitlab::Ci::Config::Loader.new(external_file.content).load!
+        end
+
+        def append_inline_content
+          @content.deep_merge!(@values)
+        end
+
+        def remove_include_keyword
+          content.delete(:include)
+          content
+        end
+      end
+    end
+  end
+end