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