Avoid instantiation of a Git::Tree

Only needed when the project view is ‘Files view’

CHANGELOG

@@ -16,6 +16,7 @@ v 8.10.0 (unreleased)
   - Fix user creation with stronger minimum password requirements !4054 (nathan-pmt)
   - PipelinesFinder uses git cache data
   - Check for conflicts with existing Project's wiki path when creating a new project.
+  - Don't instantiate a git tree on Projects show default view
   - Remove unused front-end variable -> default_issues_tracker
   - Add API endpoint for a group issues !4520 (mahcsig)
   - Add Bugzilla integration !4930 (iamtjg)

app/controllers/projects_controller.rb

@@ -4,7 +4,8 @@ class ProjectsController < Projects::ApplicationController
   before_action :authenticate_user!, except: [:show, :activity, :refs]
   before_action :project, except: [:new, :create]
   before_action :repository, except: [:new, :create]
-  before_action :assign_ref_vars, :tree, only: [:show], if: :repo_exists?
+  before_action :assign_ref_vars, only: [:show], if: :repo_exists?
+  before_action :tree, only: [:show], if: :project_view_files?
 
   # Authorize
   before_action :authorize_admin_project!, only: [:edit, :update, :housekeeping, :download_export, :export, :remove_export, :generate_new_export]
@@ -303,6 +304,10 @@ class ProjectsController < Projects::ApplicationController
     project.repository_exists? && !project.empty_repo?
   end
 
+  def project_view_files?
+    current_user && current_user.project_view == 'files'
+  end
+
   # Override extract_ref from ExtractsPath, which returns the branch and file path
   # for the blob/tree, which in this case is just the root of the default branch.
   # This way we avoid to access the repository.ref_names.