122 lines
3.6 KiB
Ruby
122 lines
3.6 KiB
Ruby
# frozen_string_literal: true
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module BackupRestore
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class BackupFileHandler
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OLD_DUMP_FILENAME = "dump.sql"
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delegate :log, to: :@logger, private: true
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def initialize(logger, filename, current_db, root_tmp_directory: Rails.root, location: nil)
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@logger = logger
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@filename = filename
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@current_db = current_db
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@root_tmp_directory = root_tmp_directory
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@is_archive = !(@filename =~ /\.sql\.gz$/)
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@store_location = location
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end
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def decompress
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create_tmp_directory
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@archive_path = File.join(@tmp_directory, @filename)
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copy_archive_to_tmp_directory
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decompress_archive
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extract_db_dump
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[@tmp_directory, @db_dump_path]
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end
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def clean_up
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return if @tmp_directory.blank?
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log "Removing tmp '#{@tmp_directory}' directory..."
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FileUtils.rm_rf(@tmp_directory) if Dir[@tmp_directory].present?
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rescue => ex
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log "Something went wrong while removing the following tmp directory: #{@tmp_directory}", ex
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end
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protected
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def create_tmp_directory
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timestamp = Time.zone.now.strftime("%Y-%m-%d-%H%M%S")
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@tmp_directory = File.join(@root_tmp_directory, "tmp", "restores", @current_db, timestamp)
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ensure_directory_exists(@tmp_directory)
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end
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def ensure_directory_exists(directory)
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log "Making sure #{directory} exists..."
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FileUtils.mkdir_p(directory)
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end
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def copy_archive_to_tmp_directory
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store = BackupRestore::BackupStore.create(location: @store_location)
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if store.remote?
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log "Downloading archive to tmp directory..."
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failure_message = "Failed to download archive to tmp directory."
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else
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log "Copying archive to tmp directory..."
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failure_message = "Failed to copy archive to tmp directory."
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end
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store.download_file(@filename, @archive_path, failure_message)
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end
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def decompress_archive
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return if !@is_archive
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# the transformation is a workaround for a bug which existed between v2.6.0.beta1 and v2.6.0.beta2
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path_transformation =
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case tar_implementation
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when :gnu
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['--transform', 's|var/www/discourse/public/uploads/|uploads/|']
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when :bsd
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['-s', '|var/www/discourse/public/uploads/|uploads/|']
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end
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log "Unzipping archive, this may take a while..."
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Discourse::Utils.execute_command(
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'tar', '--extract', '--gzip', '--file', @archive_path, '--directory', @tmp_directory,
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*path_transformation, failure_message: "Failed to decompress archive."
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)
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end
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def extract_db_dump
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@db_dump_path =
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if @is_archive
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# for compatibility with backups from Discourse v1.5 and below
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old_dump_path = File.join(@tmp_directory, OLD_DUMP_FILENAME)
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File.exists?(old_dump_path) ? old_dump_path : File.join(@tmp_directory, BackupRestore::DUMP_FILE)
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else
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File.join(@tmp_directory, @filename)
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end
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if File.extname(@db_dump_path) == '.gz'
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log "Extracting dump file..."
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Compression::Gzip.new.decompress(@tmp_directory, @db_dump_path, available_size)
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@db_dump_path.delete_suffix!('.gz')
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end
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@db_dump_path
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end
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def available_size
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SiteSetting.decompressed_backup_max_file_size_mb
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end
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def tar_implementation
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@tar_version ||= begin
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tar_version = Discourse::Utils.execute_command('tar', '--version')
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if tar_version.include?("GNU tar")
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:gnu
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elsif tar_version.include?("bsdtar")
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:bsd
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else
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raise "Unknown tar implementation: #{tar_version}"
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end
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end
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end
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end
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end
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