Class: CompareCompressors::ZstdCompressor

Inherits:
Compressor
  • Object
show all
Defined in:
lib/compare_compressors/compressors/zstd_compressor.rb

Overview

Compress with Zstandard.

Instance Method Summary collapse

Methods inherited from Compressor

#display_name, #evaluate

Instance Method Details

#compression_command(target, level) ⇒ Object 



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# File 'lib/compare_compressors/compressors/zstd_compressor.rb', line 29

def compression_command(target, level)
  ['zstd', "-#{level}", target]
end

#decompression_command(target) ⇒ Object 



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# File 'lib/compare_compressors/compressors/zstd_compressor.rb', line 33

def decompression_command(target)
  ['unzstd', output_name(target)]
end

#extension ⇒ Object 



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# File 'lib/compare_compressors/compressors/zstd_compressor.rb', line 12

def extension
  'zst'
end

#levels ⇒ Object 



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# File 'lib/compare_compressors/compressors/zstd_compressor.rb', line 16

def levels
  (1..19).to_a
end

#name ⇒ Object 



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# File 'lib/compare_compressors/compressors/zstd_compressor.rb', line 8

def name
  'zstd'
end

#version ⇒ Object 



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# File 'lib/compare_compressors/compressors/zstd_compressor.rb', line 20

def version
  status, _times, out, _err = run(name, '-V')
  return nil unless status.zero?
  version_line = out.lines.first.chomp
  raise "bad version line #{version_line}" unless
    version_line =~ /([0-9.]+),/
  Regexp.last_match(1)
end