1 files changed, 42 insertions, 0 deletions
diff --git a/lib/gitlab/ci/components/header.rb b/lib/gitlab/ci/components/header.rb
new file mode 100644
index 00000000000..732874d7a88
--- /dev/null
+++ b/lib/gitlab/ci/components/header.rb
@@ -0,0 +1,42 @@
+# frozen_string_literal: true
+
+module Gitlab
+  module Ci
+    module Components
+      ##
+      # Components::Header class represents full component specification that is being prepended as first YAML document
+      # in the CI Component file.
+      #
+      class Header
+        attr_reader :errors
+
+        def initialize(header)
+          @header = header
+          @errors = []
+        end
+
+        def empty?
+          inputs_spec.to_h.empty?
+        end
+
+        def inputs(args)
+          @input ||= Ci::Input::Inputs.new(inputs_spec, args)
+        end
+
+        def context(args)
+          inputs(args).then do |input|
+            raise ArgumentError unless input.valid?
+
+            Ci::Interpolation::Context.new({ inputs: input.to_hash })
+          end
+        end
+
+        private
+
+        def inputs_spec
+          @header.dig(:spec, :inputs)
+        end
+      end
+    end
+  end
+end