3 files changed, 87 insertions, 0 deletions
diff --git a/lib/gitlab/ci/build/policy/kubernetes.rb b/lib/gitlab/ci/build/policy/kubernetes.rb
new file mode 100644
index 00000000000..b20d374288f
--- /dev/null
+++ b/lib/gitlab/ci/build/policy/kubernetes.rb
@@ -0,0 +1,19 @@
+module Gitlab
+  module Ci
+    module Build
+      module Policy
+        class Kubernetes < Policy::Specification
+          def initialize(spec)
+            unless spec.to_sym == :active
+              raise UnknownPolicyError
+            end
+          end
+
+          def satisfied_by?(pipeline)
+            pipeline.has_kubernetes_active?
+          end
+        end
+      end
+    end
+  end
+end
diff --git a/lib/gitlab/ci/build/policy/refs.rb b/lib/gitlab/ci/build/policy/refs.rb
new file mode 100644
index 00000000000..eadc0948d2f
--- /dev/null
+++ b/lib/gitlab/ci/build/policy/refs.rb
@@ -0,0 +1,43 @@
+module Gitlab
+  module Ci
+    module Build
+      module Policy
+        class Refs < Policy::Specification
+          def initialize(refs)
+            @patterns = Array(refs)
+          end
+
+          def satisfied_by?(pipeline)
+            @patterns.any? do |pattern|
+              pattern, path = pattern.split('@', 2)
+
+              matches_path?(path, pipeline) &&
+                matches_pattern?(pattern, pipeline)
+            end
+          end
+
+          private
+
+          def matches_path?(path, pipeline)
+            return true unless path
+
+            pipeline.project_full_path == path
+          end
+
+          def matches_pattern?(pattern, pipeline)
+            return true if pipeline.tag? && pattern == 'tags'
+            return true if pipeline.branch? && pattern == 'branches'
+            return true if pipeline.source == pattern
+            return true if pipeline.source&.pluralize == pattern
+
+            if pattern.first == "/" && pattern.last == "/"
+              Regexp.new(pattern[1...-1]) =~ pipeline.ref
+            else
+              pattern == pipeline.ref
+            end
+          end
+        end
+      end
+    end
+  end
+end
diff --git a/lib/gitlab/ci/build/policy/specification.rb b/lib/gitlab/ci/build/policy/specification.rb
new file mode 100644
index 00000000000..c317291f29d
--- /dev/null
+++ b/lib/gitlab/ci/build/policy/specification.rb
@@ -0,0 +1,25 @@
+module Gitlab
+  module Ci
+    module Build
+      module Policy
+        ##
+        # Abstract class that defines an interface of job policy
+        # specification.
+        #
+        # Used for job's only/except policy configuration.
+        #
+        class Specification
+          UnknownPolicyError = Class.new(StandardError)
+
+          def initialize(spec)
+            @spec = spec
+          end
+
+          def satisfied_by?(pipeline)
+            raise NotImplementedError
+          end
+        end
+      end
+    end
+  end
+end