Merge branch 'api-labels-info' into 'master'

API: Expose open_issues_count, closed_issues_count, open_merge_requests_count on labels

Partly fixes https://gitlab.com/gitlab-org/gitlab-ce/issues/13238

See merge request !3569

CHANGELOG

@@ -19,6 +19,7 @@ v 8.7.0 (unreleased)
   - Add endpoints to archive or unarchive a project !3372
   - Add links to CI setup documentation from project settings and builds pages
   - Handle nil descriptions in Slack issue messages (Stan Hu)
+  - API: Expose open_issues_count, closed_issues_count, open_merge_requests_count for labels (Robert Schilling)
   - Add default scope to projects to exclude projects pending deletion
   - Ensure empty recipients are rejected in BuildsEmailService
   - API: Ability to filter milestones by state `active` and `closed` (Robert Schilling)

doc/api/labels.md

@@ -23,42 +23,42 @@ Example response:
    {
       "name" : "bug",
       "color" : "#d9534f",
-      "description": "Bug reported by user"
+      "description": "Bug reported by user",
+      "open_issues_count": 1,
+      "closed_issues_count": 0,
+      "open_merge_requests_count": 1
    },
    {
       "color" : "#d9534f",
       "name" : "confirmed",
-      "description": "Confirmed issue"
+      "description": "Confirmed issue",
+      "open_issues_count": 2,
+      "closed_issues_count": 5,
+      "open_merge_requests_count": 0
    },
    {
       "name" : "critical",
       "color" : "#d9534f",
-      "description": "Criticalissue. Need fix ASAP"
-   },
-   {
-      "color" : "#428bca",
-      "name" : "discussion",
-      "description": "Issue that needs further discussion"
+      "description": "Criticalissue. Need fix ASAP",
+      "open_issues_count": 1,
+      "closed_issues_count": 3,
+      "open_merge_requests_count": 1
    },
    {
       "name" : "documentation",
       "color" : "#f0ad4e",
-      "description": "Issue about documentation"
+      "description": "Issue about documentation",
+      "open_issues_count": 1,
+      "closed_issues_count": 0,
+      "open_merge_requests_count": 2
    },
    {
       "color" : "#5cb85c",
       "name" : "enhancement",
-      "description": "Enhancement proposal"
-   },
-   {
-      "color" : "#428bca",
-      "name" : "suggestion",
-      "description": "Suggestion"
-   },
-   {
-      "color" : "#f0ad4e",
-      "name" : "support",
-      "description": "Support issue"
+      "description": "Enhancement proposal",
+      "open_issues_count": 1,
+      "closed_issues_count": 0,
+      "open_merge_requests_count": 1
    }
 ]
 ```

lib/api/entities.rb

@@ -301,6 +301,7 @@ module API
 
     class Label < Grape::Entity
       expose :name, :color, :description
+      expose :open_issues_count, :closed_issues_count, :open_merge_requests_count
     end
 
     class Compare < Grape::Entity