Add default parameter to branches API

changelogs/unreleased/feature--32877-add-default-field-branch-api.yml

+---
+title: Add default parameter to branches API
+merge_request: 21294
+author: Riccardo Padovani
+type: changed

doc/api/branches.md

@@ -27,6 +27,7 @@ Example response:
     "name": "master",
     "merged": false,
     "protected": true,
+    "default": true,
     "developers_can_push": false,
     "developers_can_merge": false,
     "can_push": true,
@@ -75,6 +76,7 @@ Example response:
   "name": "master",
   "merged": false,
   "protected": true,
+  "default": true,
   "developers_can_push": false,
   "developers_can_merge": false,
   "can_push": true,
@@ -141,6 +143,7 @@ Example response:
   "name": "master",
   "merged": false,
   "protected": true,
+  "default": true,
   "developers_can_push": true,
   "developers_can_merge": true,
   "can_push": true
@@ -190,6 +193,7 @@ Example response:
   "name": "master",
   "merged": false,
   "protected": false,
+  "default": true,
   "developers_can_push": false,
   "developers_can_merge": false,
   "can_push": true
@@ -234,6 +238,7 @@ Example response:
   "name": "newbranch",
   "merged": false,
   "protected": false,
+  "default": false,
   "developers_can_push": false,
   "developers_can_merge": false,
   "can_push": true

lib/api/entities.rb

@@ -369,6 +369,10 @@ module API
       expose :can_push do |repo_branch, options|
         Gitlab::UserAccess.new(options[:current_user], project: options[:project]).can_push_to_branch?(repo_branch.name)
       end
+
+      expose :default do |repo_branch, options|
+        options[:project].default_branch == repo_branch.name
+      end
     end
 
     class TreeObject < Grape::Entity