1 files changed, 146 insertions, 0 deletions
diff --git a/lib/tasks/gitlab/import_export/import.rake b/lib/tasks/gitlab/import_export/import.rake
new file mode 100644
index 00000000000..a88fb88c7ef
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+++ b/lib/tasks/gitlab/import_export/import.rake
@@ -0,0 +1,146 @@
+# frozen_string_literal: true
+
+# Import large project archives
+#
+# This task:
+#   1. Disables ObjectStorage for archive upload
+#   2. Performs Sidekiq job synchronously
+#
+# @example
+#   bundle exec rake "gitlab:import_export:import[root, root, imported_project, /path/to/file.tar.gz]"
+#
+namespace :gitlab do
+  namespace :import_export do
+    desc 'EXPERIMENTAL | Import large project archives'
+    task :import, [:username, :namespace_path, :project_path, :archive_path] => :gitlab_environment do |_t, args|
+      # Load it here to avoid polluting Rake tasks with Sidekiq test warnings
+      require 'sidekiq/testing'
+
+      warn_user_is_not_gitlab
+
+      if ENV['IMPORT_DEBUG'].present?
+        ActiveRecord::Base.logger = Logger.new(STDOUT)
+      end
+
+      GitlabProjectImport.new(
+        namespace_path: args.namespace_path,
+        project_path:   args.project_path,
+        username:       args.username,
+        file_path:      args.archive_path
+      ).import
+    end
+  end
+end
+
+class GitlabProjectImport
+  def initialize(opts)
+    @project_path = opts.fetch(:project_path)
+    @file_path    = opts.fetch(:file_path)
+    @namespace    = Namespace.find_by_full_path(opts.fetch(:namespace_path))
+    @current_user = User.find_by_username(opts.fetch(:username))
+  end
+
+  def import
+    show_import_start_message
+
+    run_isolated_sidekiq_job
+
+    show_import_failures_count
+
+    if @project&.import_state&.last_error
+      puts "ERROR: #{@project.import_state.last_error}"
+      exit 1
+    elsif @project.errors.any?
+      puts "ERROR: #{@project.errors.full_messages.join(', ')}"
+      exit 1
+    else
+      puts 'Done!'
+    end
+  rescue StandardError => e
+    puts "Exception: #{e.message}"
+    puts e.backtrace
+    exit 1
+  end
+
+  private
+
+  def with_request_store
+    RequestStore.begin!
+    yield
+  ensure
+    RequestStore.end!
+    RequestStore.clear!
+  end
+
+  # We want to ensure that all Sidekiq jobs are executed
+  # synchronously as part of that process.
+  # This ensures that all expensive operations do not escape
+  # to general Sidekiq clusters/nodes.
+  def run_isolated_sidekiq_job
+    Sidekiq::Testing.fake! do
+      with_request_store do
+        @project = create_project
+
+        execute_sidekiq_job
+      end
+      true
+    end
+  end
+
+  def create_project
+    # We are disabling ObjectStorage for `import`
+    # as it is too slow to handle big archives:
+    # 1. DB transaction timeouts on upload
+    # 2. Download of archive before unpacking
+    disable_upload_object_storage do
+      service = Projects::GitlabProjectsImportService.new(
+        @current_user,
+        {
+          namespace_id: @namespace.id,
+          path:         @project_path,
+          file:         File.open(@file_path)
+        }
+      )
+
+      service.execute
+    end
+  end
+
+  def execute_sidekiq_job
+    Sidekiq::Worker.drain_all
+  end
+
+  def disable_upload_object_storage
+    overwrite_uploads_setting('background_upload', false) do
+      overwrite_uploads_setting('direct_upload', false) do
+        yield
+      end
+    end
+  end
+
+  def overwrite_uploads_setting(key, value)
+    old_value = Settings.uploads.object_store[key]
+    Settings.uploads.object_store[key] = value
+
+    yield
+
+  ensure
+    Settings.uploads.object_store[key] = old_value
+  end
+
+  def full_path
+    "#{@namespace.full_path}/#{@project_path}"
+  end
+
+  def show_import_start_message
+    puts "Importing GitLab export: #{@file_path} into GitLab" \
+      " #{full_path}" \
+      " as #{@current_user.name}"
+  end
+
+  def show_import_failures_count
+    return unless @project.import_failures.exists?
+
+    puts "Total number of not imported relations: #{@project.import_failures.count}"
+  end
+end