19 lines
		
	
	
		
			562 B
		
	
	
	
		
			Ruby
		
	
	
	
	
	
			
		
		
	
	
			19 lines
		
	
	
		
			562 B
		
	
	
	
		
			Ruby
		
	
	
	
	
	
| require "tmpdir"
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| 
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| require "hbc/container/base"
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| 
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| class Hbc::Container::Tar < Hbc::Container::Base
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|   def self.me?(criteria)
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|     criteria.magic_number(%r{^.{257}ustar}n) ||
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|       # or compressed tar (bzip2/gzip/lzma/xz)
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|       IO.popen(["/usr/bin/tar", "-t", "-f", criteria.path.to_s], err: "/dev/null") { |io| !io.read(1).nil? }
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|   end
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| 
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|   def extract
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|     Dir.mktmpdir do |unpack_dir|
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|       @command.run!("/usr/bin/tar", args: ["-x", "-f", @path, "-C", unpack_dir])
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|       @command.run!("/usr/bin/ditto", args: ["--", unpack_dir, @cask.staged_path])
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|     end
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|   end
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| end
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