Add new GitlabDanger class

This class encapsulates our use of the Danger gem.

1 files changed, 14 insertions, 4 deletions

diff --git a/danger/database/Dangerfile b/danger/database/Dangerfile
index 3550cb7eabf..5cdad09db6e 100644
--- a/danger/database/Dangerfile
+++ b/danger/database/Dangerfile
@@ -1,7 +1,13 @@
 # frozen_string_literal: true
 
-SCHEMA_NOT_UPDATED_MESSAGE = <<~MSG
-**New %<migrations>s added but %<schema>s wasn't updated.**
+gitlab_danger = GitlabDanger.new(helper.gitlab_helper)
+
+SCHEMA_NOT_UPDATED_MESSAGE_SHORT = <<~MSG
+New %<migrations>s added but %<schema>s wasn't updated.
+MSG
+
+SCHEMA_NOT_UPDATED_MESSAGE_FULL = <<~MSG
+**#{SCHEMA_NOT_UPDATED_MESSAGE_SHORT}**
 
 Usually, when adding new %<migrations>s, %<schema>s should be
 updated too (unless the migration isn't changing the DB schema
@@ -29,14 +35,18 @@ geo_db_schema_updated = !git.modified_files.grep(%r{\Aee/db/geo/schema\.rb}).emp
 non_geo_migration_created = !git.added_files.grep(%r{\A(db/(post_)?migrate)/}).empty?
 geo_migration_created = !git.added_files.grep(%r{\Aee/db/geo/(post_)?migrate/}).empty?
 
+format_str = gitlab_danger.ci? ? SCHEMA_NOT_UPDATED_MESSAGE_FULL : SCHEMA_NOT_UPDATED_MESSAGE_SHORT
+
 if non_geo_migration_created && !non_geo_db_schema_updated
-  warn format(SCHEMA_NOT_UPDATED_MESSAGE, migrations: 'migrations', schema: gitlab.html_link("db/schema.rb"))
+  warn format(format_str, migrations: 'migrations', schema: gitlab_danger.html_link("db/schema.rb"))
 end
 
 if geo_migration_created && !geo_db_schema_updated
-  warn format(SCHEMA_NOT_UPDATED_MESSAGE, migrations: 'Geo migrations', schema: gitlab.html_link("ee/db/geo/schema.rb"))
+  warn format(format_str, migrations: 'Geo migrations', schema: gitlab_danger.html_link("ee/db/geo/schema.rb"))
 end
 
+return unless gitlab_danger.ci?
+
 db_paths_to_review = helper.changes_by_category[:database]
 
 if gitlab.mr_labels.include?('database') || db_paths_to_review.any?