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Directory Comparison Utility (like comm, but for directories)
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| #! /usr/bin/env ruby | |
| # SPDX-License-Identifier: MIT | |
| # The MIT License (MIT) | |
| # Copyright © 2020 Chris Olstrom <[email protected]> | |
| # Copyright © 2020 SUSE Software Solutions | |
| # Permission is hereby granted, free of charge, to any person obtaining a copy | |
| # of this software and associated documentation files (the “Software”), to deal | |
| # in the Software without restriction, including without limitation the rights | |
| # to use, copy, modify, merge, publish, distribute, sublicense, and/or sell | |
| # copies of the Software, and to permit persons to whom the Software is | |
| # furnished to do so, subject to the following conditions: | |
| # The above copyright notice and this permission notice shall be included in | |
| # all copies or substantial portions of the Software. | |
| # THE SOFTWARE IS PROVIDED “AS IS”, WITHOUT WARRANTY OF ANY KIND, EXPRESS OR | |
| # IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | |
| # FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE | |
| # AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER | |
| # LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, | |
| # OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN | |
| # THE SOFTWARE. | |
| require "digest/sha2" # SPDX-License-Identifier: Ruby | |
| require "find" # SPDX-License-Identifier: Ruby | |
| require "optparse" # SPDX-License-Identifier: Ruby | |
| require "pathname" # SPDX-License-Identifier: Ruby | |
| require "set" # SPDX-License-Identifier: Ruby | |
| options = { | |
| suppress: Set.new | |
| } | |
| OptionParser.new do |parser| | |
| parser.on("-1", "suppress column 1 (entries unique to DIR1") { options[:suppress] << 1 } | |
| parser.on("-2", "suppress column 2 (entries unique to DIR2") { options[:suppress] << 2 } | |
| parser.on("-3", "suppress column 3 (entries that appear in both directories") { options[:suppress] << 3 } | |
| end.parse! | |
| unless ARGV.size == 2 | |
| STDERR.puts "Usage: #{File.basename($PROGRAM_NAME)} [ options ] DIR1 DIR2" | |
| exit Errno::EINVAL::Errno | |
| end | |
| FileSystemObject = Struct.new(:location, :type, :digest, :target) | |
| class FileSystemObject | |
| def to_s | |
| location.to_s | |
| end | |
| end | |
| ContentsOf = lambda do |path| | |
| Pathname(path).yield_self do |root| | |
| Find.find(root).map do |entry| | |
| Pathname(entry).yield_self do |pathname| | |
| FileSystemObject.new.tap do |fso| | |
| fso.location = pathname.relative_path_from(root) | |
| fso.type = pathname.ftype.to_sym | |
| case fso.type | |
| when :link then fso.target = pathname.readlink | |
| when :file then fso.digest = Digest::SHA256.hexdigest(pathname.read) | |
| end | |
| end | |
| end | |
| end.reduce(Set.new, &:<<) | |
| end | |
| end | |
| dir1 = ContentsOf.(ARGV.pop) | |
| dir2 = ContentsOf.(ARGV.pop) | |
| either = dir1.union(dir2) | |
| both = dir1.intersection(dir2) | |
| first = dir1.difference(both) | |
| second = dir2.difference(both) | |
| STDOUT.puts( | |
| either.map do |entry| | |
| ( | |
| if both.include?(entry) | |
| [nil, nil, entry] unless options[:suppress].include?(3) | |
| elsif second.include?(entry) | |
| [nil, entry, nil] unless options[:suppress].include?(2) | |
| elsif first.include?(entry) | |
| [entry, nil, nil] unless options[:suppress].include?(1) | |
| end || [] | |
| ).map(&:to_s).join("\t") | |
| end.reject(&:empty?).join("\n") | |
| ) |
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