Add option to "Trigger builds for mirror updates"

CHANGELOG-EE

@@ -4,6 +4,7 @@ v 8.4.0 (unreleased)
   - Fix "Approvals are not reset after a new push is made if the request is coming from a fork"
   - Fix "User is not automatically removed from suggested approvers list if user is deleted"
   - Add option to enforce a semi-linear history by only allowing merge requests to be merged that have been rebased.
+  - Add option to trigger builds when branches or tags are updated from a mirrored upstream repository.
 
 v 8.3.2
   - No EE-specific changes

app/controllers/projects/mirrors_controller.rb

@@ -38,6 +38,6 @@ class Projects::MirrorsController < Projects::ApplicationController
   private
 
   def mirror_params
-    params.require(:project).permit(:mirror, :import_url, :mirror_user_id)
+    params.require(:project).permit(:mirror, :import_url, :mirror_user_id, :mirror_trigger_builds)
   end
 end

app/controllers/projects_controller.rb

@@ -260,6 +260,7 @@ class ProjectsController < ApplicationController
       :merge_requests_template,
       :mirror,
       :mirror_user_id,
+      :mirror_trigger_builds,
       :reset_approvals_on_push
     )
   end

app/helpers/application_helper.rb

@@ -141,6 +141,9 @@ module ApplicationHelper
     # Skip if user removed branch right after that
     return false unless project.repository.branch_names.include?(event.branch_name)
 
+    # Skip if this was a mirror update
+    return false if project.mirror? && project.up_to_date_with_upstream?(event.branch_name)
+
     true
   end
 

app/models/repository.rb

@@ -643,6 +643,17 @@ class Repository
     end
   end
 
+  def up_to_date_with_upstream?(branch_name)
+    branch_commit = commit(branch_name)
+    upstream_commit = commit("refs/remotes/#{MIRROR_REMOTE}/#{branch_name}")
+
+    if upstream_commit
+      is_ancestor?(branch_commit.id, upstream_commit.id)
+    else
+      false
+    end
+  end
+
   def merge_base(first_commit_id, second_commit_id)
     rugged.merge_base(first_commit_id, second_commit_id)
   end

app/services/create_commit_builds_service.rb

 class CreateCommitBuildsService
-  def execute(project, user, params)
+  def execute(project, user, params, mirror_update: false)
     return false unless project.builds_enabled?
 
+    return false if !project.mirror_trigger_builds? && mirror_update
+
     sha = params[:checkout_sha] || params[:after]
     origin_ref = params[:ref]
 

app/services/git_push_service.rb

@@ -58,10 +58,13 @@ class GitPushService
 
     @push_data = build_push_data(oldrev, newrev, ref)
 
+    branch_name = Gitlab::Git.ref_name(ref)
+    mirror_update = project.mirror? && project.up_to_date_with_upstream?(branch_name)
+
     EventCreateService.new.push(project, user, @push_data)
     project.execute_hooks(@push_data.dup, :push_hooks)
     project.execute_services(@push_data.dup, :push_hooks)
-    CreateCommitBuildsService.new.execute(project, @user, @push_data)
+    CreateCommitBuildsService.new.execute(project, @user, @push_data, mirror_update: mirror_update)
     ProjectCacheWorker.perform_async(project.id)
   end
 

app/services/git_tag_push_service.rb

 class GitTagPushService
   attr_accessor :project, :user, :push_data
 
-  def execute(project, user, oldrev, newrev, ref)
+  def execute(project, user, oldrev, newrev, ref, mirror_update: false)
     project.repository.expire_cache
 
     @project, @user = project, user
@@ -10,7 +10,7 @@ class GitTagPushService
     EventCreateService.new.push(project, user, @push_data)
     project.execute_hooks(@push_data.dup, :tag_push_hooks)
     project.execute_services(@push_data.dup, :tag_push_hooks)
-    CreateCommitBuildsService.new.execute(project, @user, @push_data)
+    CreateCommitBuildsService.new.execute(project, @user, @push_data, mirror_update: mirror_update)
     ProjectCacheWorker.perform_async(project.id)
 
     true

app/services/projects/update_mirror_service.rb

@@ -43,7 +43,7 @@ module Projects
         else
           begin
             repository.ff_merge(current_user, upstream_branch.target, name)
-          rescue Repository::PreReceiveError, Repository::CommitError => e
+          rescue GitHooksService::PreReceiveError, Repository::CommitError => e
             raise UpdateError, e.message
           end
         end
@@ -66,7 +66,7 @@ module Projects
 
         next if old_tag_target == tag.target
 
-        GitTagPushService.new.execute(project, current_user, old_tag_target, tag.target, "#{Gitlab::Git::TAG_REF_PREFIX}#{tag.name}")
+        GitTagPushService.new.execute(project, current_user, old_tag_target, tag.target, "#{Gitlab::Git::TAG_REF_PREFIX}#{tag.name}", mirror_update: true)
       end
 
       fetch_result

app/views/projects/edit.html.haml

@@ -162,6 +162,8 @@
                       phpunit --coverage-text --colors=never (PHP) -
                       %code ^\s*Lines:\s*\d+.\d+\%
 
+            - if @project.mirror?
+              = render 'shared/mirror_trigger_builds_setting', f: f
 
           %fieldset.features
             %legend

app/views/projects/mirrors/show.html.haml

@@ -66,5 +66,8 @@
         like new branches being created or new commits being pushed to existing branches.
         They need to have at least master access to this project.
 
+  - if @project.builds_enabled?
+    = render 'shared/mirror_trigger_builds_setting', f: f
+
   .form-actions
     = f.submit "Save Changes", class: "btn btn-create"

app/views/shared/_mirror_trigger_builds_setting.html.haml

+.form-group
+  .col-sm-offset-2.col-sm-10
+    .checkbox
+      = f.label :mirror_trigger_builds do
+        = f.check_box :mirror_trigger_builds
+        %strong
+          Trigger builds for mirror updates
+      .help-block
+        Trigger builds when branches or tags are updated from the upstream repository.
+        Depending on the activity of the upstream repository, this may greatly increase the load on your CI runners.
+        Only enable this if you know they can handle the load.

db/migrate/20160119170055_add_mirror_trigger_builds_to_projects.rb

+class AddMirrorTriggerBuildsToProjects < ActiveRecord::Migration
+  def change
+    add_column :projects, :mirror_trigger_builds, :boolean, default: false, null: false
+  end
+end

db/schema.rb

@@ -11,7 +11,7 @@
 #
 # It's strongly recommended that you check this file into your version control system.
 
-ActiveRecord::Schema.define(version: 20160113111034) do
+ActiveRecord::Schema.define(version: 20160119170055) do
 
   # These are extensions that must be enabled in order to support this database
   enable_extension "plpgsql"
@@ -763,6 +763,7 @@ ActiveRecord::Schema.define(version: 20160113111034) do
     t.string   "build_coverage_regex"
     t.boolean  "build_allow_git_fetch",            default: true,     null: false
     t.integer  "build_timeout",                    default: 3600,     null: false
+    t.boolean  "mirror_trigger_builds",                        default: false,    null: false
   end
 
   add_index "projects", ["builds_enabled", "shared_runners_enabled"], name: "index_projects_on_builds_enabled_and_shared_runners_enabled", using: :btree