Reviewer roulette ignores changelogs

danger/roulette/Dangerfile

@@ -53,6 +53,9 @@ def build_list(items)
 end
 changes = helper.changes_by_category
+
+# Ignore any files that are known but uncategoried. Prompt for any unknown files
+changes.delete(:none)
 categories = changes.keys - [:unknown]
 unless changes.empty?

lib/gitlab/danger/helper.rb

@@ -95,6 +95,7 @@ module Gitlab
       CATEGORY_LABELS = {
         docs: "~Documentation",
+        none: "",
         qa: "~QA"
       }.freeze
@@ -120,6 +121,9 @@ module Gitlab
         %r{\A(ee/)?db/} => :database,
         %r{\A(ee/)?qa/} => :qa,
+        # Files that don't fit into any category are marked with :none
+        %r{\A(ee/)?changelogs/} => :none,
+
         # Fallbacks in case the above patterns miss anything
         %r{\.rb\z} => :backend,
         %r{\.(md|txt)\z} => :docs,

spec/lib/gitlab/danger/helper_spec.rb

@@ -184,7 +184,7 @@ describe Gitlab::Danger::Helper do
   describe '#changes_by_category' do
     it 'categorizes changed files' do
-      expect(fake_git).to receive(:added_files) { %w[foo foo.md foo.rb foo.js db/foo qa/foo] }
+      expect(fake_git).to receive(:added_files) { %w[foo foo.md foo.rb foo.js db/foo qa/foo ee/changelogs/foo.yml] }
       allow(fake_git).to receive(:modified_files) { [] }
       allow(fake_git).to receive(:renamed_files) { [] }
@@ -193,6 +193,7 @@ describe Gitlab::Danger::Helper do
         database: %w[db/foo],
         docs: %w[foo.md],
         frontend: %w[foo.js],
+        none: %w[ee/changelogs/foo.yml],
         qa: %w[qa/foo],
         unknown: %w[foo]
       )
@@ -260,6 +261,9 @@ describe Gitlab::Danger::Helper do
       'ee/db/foo' | :database
       'ee/qa/foo' | :qa
+      'changelogs/foo'    | :none
+      'ee/changelogs/foo' | :none
+
       'FOO'          | :unknown
       'foo'          | :unknown
@@ -283,6 +287,7 @@ describe Gitlab::Danger::Helper do
       :docs      | '~Documentation'
       :foo       | '~foo'
       :frontend  | '~frontend'
+      :none      | ''
       :qa        | '~QA'
     end