1 files changed, 39 insertions, 0 deletions
diff --git a/lib/gitlab/ci/environment_matcher.rb b/lib/gitlab/ci/environment_matcher.rb
new file mode 100644
index 00000000000..7d7a7742f68
--- /dev/null
+++ b/lib/gitlab/ci/environment_matcher.rb
@@ -0,0 +1,39 @@
+# frozen_string_literal: true
+
+module Gitlab
+  module Ci
+    class EnvironmentMatcher
+      def initialize(pattern)
+        @pattern = pattern
+      end
+
+      def match?(environment)
+        return false if pattern.blank?
+
+        exact_match?(environment) || wildcard_match?(environment)
+      end
+
+      private
+
+      attr_reader :pattern, :match_type
+
+      def exact_match?(environment)
+        pattern == environment
+      end
+
+      def wildcard_match?(environment)
+        return false unless wildcard?
+
+        wildcard_regex.match?(environment)
+      end
+
+      def wildcard?
+        pattern.include?('*')
+      end
+
+      def wildcard_regex
+        @wildcard_regex ||= Regexp.new(pattern.gsub('*', '.*'))
+      end
+    end
+  end
+end