Merge branch 'feature/gb/pipeline-only-except-with-modified-paths' into 'master'

Pipeline only/except for modified paths

See merge request gitlab-org/gitlab-ce!21981

2 files changed, 29 insertions, 2 deletions

diff --git a/lib/gitlab/ci/build/policy/changes.rb b/lib/gitlab/ci/build/policy/changes.rb
new file mode 100644
index 00000000000..7bf51519752
--- /dev/null
+++ b/lib/gitlab/ci/build/policy/changes.rb
@@ -0,0 +1,25 @@
+# frozen_string_literal: true
+
+module Gitlab
+  module Ci
+    module Build
+      module Policy
+        class Changes < Policy::Specification
+          def initialize(globs)
+            @globs = Array(globs)
+          end
+
+          def satisfied_by?(pipeline, seed)
+            return true unless pipeline.branch_updated?
+
+            pipeline.modified_paths.any? do |path|
+              @globs.any? do |glob|
+                File.fnmatch?(glob, path, File::FNM_PATHNAME | File::FNM_DOTMATCH)
+              end
+            end
+          end
+        end
+      end
+    end
+  end
+end
diff --git a/lib/gitlab/ci/config/entry/policy.rb b/lib/gitlab/ci/config/entry/policy.rb
index 09e8e52b60f..c92562f8c85 100644
--- a/lib/gitlab/ci/config/entry/policy.rb
+++ b/lib/gitlab/ci/config/entry/policy.rb
@@ -25,17 +25,19 @@ module Gitlab
             include Entry::Validatable
             include Entry::Attributable
 
-            attributes :refs, :kubernetes, :variables
+            ALLOWED_KEYS = %i[refs kubernetes variables changes].freeze
+            attributes :refs, :kubernetes, :variables, :changes
 
             validations do
               validates :config, presence: true
-              validates :config, allowed_keys: %i[refs kubernetes variables]
+              validates :config, allowed_keys: ALLOWED_KEYS
               validate :variables_expressions_syntax
 
               with_options allow_nil: true do
                 validates :refs, array_of_strings_or_regexps: true
                 validates :kubernetes, allowed_values: %w[active]
                 validates :variables, array_of_strings: true
+                validates :changes, array_of_strings: true
               end
 
               def variables_expressions_syntax