1 files changed, 30 insertions, 0 deletions
diff --git a/lib/gitlab/ci/pipeline/expression/lexeme/not_matches.rb b/lib/gitlab/ci/pipeline/expression/lexeme/not_matches.rb
new file mode 100644
index 00000000000..831c27fa0ea
--- /dev/null
+++ b/lib/gitlab/ci/pipeline/expression/lexeme/not_matches.rb
@@ -0,0 +1,30 @@
+# frozen_string_literal: true
+
+module Gitlab
+  module Ci
+    module Pipeline
+      module Expression
+        module Lexeme
+          class NotMatches < Lexeme::Operator
+            PATTERN = /\!~/.freeze
+
+            def evaluate(variables = {})
+              text = @left.evaluate(variables)
+              regexp = @right.evaluate(variables)
+
+              regexp.scan(text.to_s).none?
+            end
+
+            def self.build(_value, behind, ahead)
+              new(behind, ahead)
+            end
+
+            def self.precedence
+              10 # See: https://ruby-doc.org/core-2.5.0/doc/syntax/precedence_rdoc.html
+            end
+          end
+        end
+      end
+    end
+  end
+end