diff options
Diffstat (limited to 'lib/gitlab/background_migration/populate_untracked_uploads.rb')
| -rw-r--r-- | lib/gitlab/background_migration/populate_untracked_uploads.rb | 259 |
1 files changed, 259 insertions, 0 deletions
diff --git a/lib/gitlab/background_migration/populate_untracked_uploads.rb b/lib/gitlab/background_migration/populate_untracked_uploads.rb new file mode 100644 index 00000000000..81e95e5832d --- /dev/null +++ b/lib/gitlab/background_migration/populate_untracked_uploads.rb @@ -0,0 +1,259 @@ +# frozen_string_literal: true + +module Gitlab + module BackgroundMigration + # This class processes a batch of rows in `untracked_files_for_uploads` by + # adding each file to the `uploads` table if it does not exist. + class PopulateUntrackedUploads # rubocop:disable Metrics/ClassLength + # This class is responsible for producing the attributes necessary to + # track an uploaded file in the `uploads` table. + class UntrackedFile < ActiveRecord::Base # rubocop:disable Metrics/ClassLength, Metrics/LineLength + self.table_name = 'untracked_files_for_uploads' + + # Ends with /:random_hex/:filename + FILE_UPLOADER_PATH = %r{/\h+/[^/]+\z} + FULL_PATH_CAPTURE = %r{\A(.+)#{FILE_UPLOADER_PATH}} + + # These regex patterns are tested against a relative path, relative to + # the upload directory. + # For convenience, if there exists a capture group in the pattern, then + # it indicates the model_id. + PATH_PATTERNS = [ + { + pattern: %r{\A-/system/appearance/logo/(\d+)/}, + uploader: 'AttachmentUploader', + model_type: 'Appearance' + }, + { + pattern: %r{\A-/system/appearance/header_logo/(\d+)/}, + uploader: 'AttachmentUploader', + model_type: 'Appearance' + }, + { + pattern: %r{\A-/system/note/attachment/(\d+)/}, + uploader: 'AttachmentUploader', + model_type: 'Note' + }, + { + pattern: %r{\A-/system/user/avatar/(\d+)/}, + uploader: 'AvatarUploader', + model_type: 'User' + }, + { + pattern: %r{\A-/system/group/avatar/(\d+)/}, + uploader: 'AvatarUploader', + model_type: 'Namespace' + }, + { + pattern: %r{\A-/system/project/avatar/(\d+)/}, + uploader: 'AvatarUploader', + model_type: 'Project' + }, + { + pattern: FILE_UPLOADER_PATH, + uploader: 'FileUploader', + model_type: 'Project' + } + ].freeze + + def to_h + @upload_hash ||= { + path: upload_path, + uploader: uploader, + model_type: model_type, + model_id: model_id, + size: file_size, + checksum: checksum + } + end + + def upload_path + # UntrackedFile#path is absolute, but Upload#path depends on uploader + @upload_path ||= + if uploader == 'FileUploader' + # Path relative to project directory in uploads + matchd = path_relative_to_upload_dir.match(FILE_UPLOADER_PATH) + matchd[0].sub(%r{\A/}, '') # remove leading slash + else + path + end + end + + def uploader + matching_pattern_map[:uploader] + end + + def model_type + matching_pattern_map[:model_type] + end + + def model_id + return @model_id if defined?(@model_id) + + pattern = matching_pattern_map[:pattern] + matchd = path_relative_to_upload_dir.match(pattern) + + # If something is captured (matchd[1] is not nil), it is a model_id + # Only the FileUploader pattern will not match an ID + @model_id = matchd[1] ? matchd[1].to_i : file_uploader_model_id + end + + def file_size + File.size(absolute_path) + end + + def checksum + Digest::SHA256.file(absolute_path).hexdigest + end + + private + + def matching_pattern_map + @matching_pattern_map ||= PATH_PATTERNS.find do |path_pattern_map| + path_relative_to_upload_dir.match(path_pattern_map[:pattern]) + end + + unless @matching_pattern_map + raise "Unknown upload path pattern \"#{path}\"" + end + + @matching_pattern_map + end + + def file_uploader_model_id + matchd = path_relative_to_upload_dir.match(FULL_PATH_CAPTURE) + not_found_msg = <<~MSG + Could not capture project full_path from a FileUploader path: + "#{path_relative_to_upload_dir}" + MSG + raise not_found_msg unless matchd + + full_path = matchd[1] + project = Project.find_by_full_path(full_path) + return nil unless project + + project.id + end + + # Not including a leading slash + def path_relative_to_upload_dir + upload_dir = Gitlab::BackgroundMigration::PrepareUntrackedUploads::RELATIVE_UPLOAD_DIR # rubocop:disable Metrics/LineLength + base = %r{\A#{Regexp.escape(upload_dir)}/} + @path_relative_to_upload_dir ||= path.sub(base, '') + end + + def absolute_path + File.join(CarrierWave.root, path) + end + end + + # This class is used to query the `uploads` table. + class Upload < ActiveRecord::Base + self.table_name = 'uploads' + end + + def perform(start_id, end_id) + return unless migrate? + + files = UntrackedFile.where(id: start_id..end_id) + processed_files = insert_uploads_if_needed(files) + processed_files.delete_all + + drop_temp_table_if_finished + end + + private + + def migrate? + UntrackedFile.table_exists? && Upload.table_exists? + end + + def insert_uploads_if_needed(files) + filtered_files, error_files = filter_error_files(files) + filtered_files = filter_existing_uploads(filtered_files) + filtered_files = filter_deleted_models(filtered_files) + insert(filtered_files) + + processed_files = files.where.not(id: error_files.map(&:id)) + processed_files + end + + def filter_error_files(files) + files.partition do |file| + begin + file.to_h + true + rescue => e + msg = <<~MSG + Error parsing path "#{file.path}": + #{e.message} + #{e.backtrace.join("\n ")} + MSG + Rails.logger.error(msg) + false + end + end + end + + def filter_existing_uploads(files) + paths = files.map(&:upload_path) + existing_paths = Upload.where(path: paths).pluck(:path).to_set + + files.reject do |file| + existing_paths.include?(file.upload_path) + end + end + + # There are files on disk that are not in the uploads table because their + # model was deleted, and we don't delete the files on disk. + def filter_deleted_models(files) + ids = deleted_model_ids(files) + + files.reject do |file| + ids[file.model_type].include?(file.model_id) + end + end + + def deleted_model_ids(files) + ids = { + 'Appearance' => [], + 'Namespace' => [], + 'Note' => [], + 'Project' => [], + 'User' => [] + } + + # group model IDs by model type + files.each do |file| + ids[file.model_type] << file.model_id + end + + ids.each do |model_type, model_ids| + model_class = Object.const_get(model_type) + found_ids = model_class.where(id: model_ids.uniq).pluck(:id) + deleted_ids = ids[model_type] - found_ids + ids[model_type] = deleted_ids + end + + ids + end + + def insert(files) + rows = files.map do |file| + file.to_h.merge(created_at: 'NOW()') + end + + Gitlab::Database.bulk_insert('uploads', + rows, + disable_quote: :created_at) + end + + def drop_temp_table_if_finished + if UntrackedFile.all.empty? + UntrackedFile.connection.drop_table(:untracked_files_for_uploads, + if_exists: true) + end + end + end + end +end |