Send trace to a browser incrementally when build is running

We send a state of ansi2html to client, client needs to send this state back.
The state describes the configuration of generator and position within trace.

1 files changed, 15 insertions, 0 deletions

diff --git a/app/controllers/projects/builds_controller.rb b/app/controllers/projects/builds_controller.rb
index b8b9e78427d..3c9a52a5ddd 100644
--- a/app/controllers/projects/builds_controller.rb
+++ b/app/controllers/projects/builds_controller.rb
@@ -38,6 +38,14 @@ class Projects::BuildsController < Projects::ApplicationController
     end
   end
 
+  def trace
+    respond_to do |format|
+      format.json do
+        render json: @build.trace_with_state(params_state).merge!(id: @build.id, status: @build.status)
+      end
+    end
+  end
+
   def retry
     unless @build.retryable?
       return render_404
@@ -72,6 +80,13 @@ class Projects::BuildsController < Projects::ApplicationController
 
   private
 
+  def params_state
+    begin
+      JSON.parse(params[:state], symbolize_names: true)
+    rescue
+    end
+  end
+
   def build
     @build ||= project.builds.unscoped.find_by!(id: params[:id])
   end