Merge branch 'danger-docs' into 'master'

Add docs exception to Danger, and fix links to foss

See merge request gitlab-org/gitlab!20815

danger/changes_size/Dangerfile

 # FIXME: git.info_for_file raises the following error
 # /usr/local/bundle/gems/git-1.4.0/lib/git/lib.rb:956:in `command':  (Danger::DSLError)
 # [!] Invalid `Dangerfile` file:
-# [!] Invalid `Dangerfile` file: git '--git-dir=/builds/gitlab-org/gitlab-foss/.git' '--work-tree=/builds/gitlab-org/gitlab-foss' cat-file '-t' ''  2>&1:fatal: Not a valid object name
+# [!] Invalid `Dangerfile` file: git '--git-dir=/builds/gitlab-org/gitlab/.git' '--work-tree=/builds/gitlab-org/gitlab' cat-file '-t' ''  2>&1:fatal: Not a valid object name
 # This seems to be the same as https://github.com/danger/danger/issues/535.
 
 # locale_files_updated = git.modified_files.select { |path| path.start_with?('locale') }

danger/database/Dangerfile

@@ -20,7 +20,7 @@ changes are reviewed, take the following steps:
 
 1. Ensure the merge request has ~database and ~"database::review pending" labels.
    If the merge request modifies database files, Danger will do this for you.
-1. Use the [Database changes checklist](https://gitlab.com/gitlab-org/gitlab-foss/blob/master/.gitlab/merge_request_templates/Database%20changes.md)
+1. Use the [Database changes checklist](https://gitlab.com/gitlab-org/gitlab/blob/master/.gitlab/merge_request_templates/Database%20changes.md)
    template or add the appropriate items to the MR description.
 1. Assign and mention the database reviewer suggested by Reviewer Roulette.
 MSG

danger/roulette/Dangerfile

@@ -27,7 +27,7 @@ UNKNOWN_FILES_MESSAGE = <<MARKDOWN
 
 These files couldn't be categorised, so Danger was unable to suggest a reviewer.
 Please consider creating a merge request to
-[add support](https://gitlab.com/gitlab-org/gitlab-foss/blob/master/lib/gitlab/danger/helper.rb)
+[add support](https://gitlab.com/gitlab-org/gitlab/blob/master/lib/gitlab/danger/helper.rb)
 for them.
 MARKDOWN
 
@@ -46,7 +46,7 @@ def spin_for_category(team, project, category, branch_name)
     end
 
   # TODO: take CODEOWNERS into account?
-  # https://gitlab.com/gitlab-org/gitlab-foss/issues/57653
+  # https://gitlab.com/gitlab-org/gitlab/issues/26723
 
   # Make traintainers have triple the chance to be picked as a reviewer
   reviewer = roulette.spin_for_person(reviewers + traintainers + traintainers, random: random)

lib/gitlab/danger/helper.rb

@@ -153,7 +153,10 @@ module Gitlab
 
         # Fallbacks in case the above patterns miss anything
         %r{\.rb\z} => :backend,
-        %r{\.(md|txt)\z} => :none, # To reinstate roulette for documentation, set to `:docs`.
+        %r{(
+          \.(md|txt)\z |
+          \.markdownlint\.json
+        )}x => :none, # To reinstate roulette for documentation, set to `:docs`.
         %r{\.js\z} => :frontend
       }.freeze