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package_root.rb
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# frozen_string_literal: true # # Copyright (C) 2017 - present Instructure, Inc. # # This file is part of Canvas. # # Canvas is free software: you can redistribute it and/or modify it under # the terms of the GNU Affero General Public License as published by the Free # Software Foundation, version 3 of the License. # # Canvas is distributed in the hope that it will be useful, but WITHOUT ANY # WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR # A PARTICULAR PURPOSE. See the GNU Affero General Public License for more # details. # # You should have received a copy of the GNU Affero General Public License along # with this program. If not, see <http://www.gnu.org/licenses/>. # class PackageRoot # initialize with the root directory of an extracted package def initialize(root_path) @root_path = Pathname(root_path).realpath @prefix = @root_path.to_s + "/" end # return the root path. NOTE: don't manually File.join this; use item_path instead def root_path @root_path.to_s end # return the absolute path of an item in the package, given one or more relative path entries # e.g., if the root_path is /tmp/blah and args are ['foo', 'bar'], returns "/tmp/blah/foo/bar" # raises an error if ".." path entries would traverse above the root_path in the file system. def item_path(*relative_path_entries) path = Pathname(File.join(@prefix, *relative_path_entries)).cleanpath.to_s raise ArgumentError, "invalid relative_path_entries: #{relative_path_entries.inspect}" unless path.start_with?(@prefix) path end # given a full path to an item in the package, return its path relative to the package root def relative_path(item_path) Pathname(item_path).realpath.relative_path_from(@root_path).to_s end # enumerate files matching the given pattern def contents(pattern = "**/*") Dir[@root_path.join(pattern).to_s] end end