Add a new module Schemas to manage multiple schema versions.

lib/cff/schemas.rb

@@ -0,0 +1,28 @@
+# frozen_string_literal: true
+
+# Copyright (c) 2018-2024 The Ruby Citation File Format Developers.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+require 'json'
+
+##
+module CFF
+  module Schemas # :nodoc:
+    PATH = ::File.join(__dir__, 'schemas')
+    FILES = Dir.glob(::File.join(PATH, '*.json')).to_h do |file|
+      [::File.basename(file, '.json'), JSON.parse(::File.read(file))]
+    end.freeze
+    VERSIONS = FILES.keys.freeze
+  end
+end