Method: Exiftool#initialize

Defined in:
lib/exiftool.rb

#initialize(filenames, exiftool_opts = '') ⇒ Exiftool

Returns a new instance of Exiftool.

Raises:



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# File 'lib/exiftool.rb', line 62

def initialize(filenames, exiftool_opts = '')
  @file2result = {}
  io_input = nil
  if filenames.is_a?(IO)
    io_input = filenames
    filenames = ['-']
  end

  filenames = [filenames] if filenames.is_a?(String) || filenames.is_a?(Pathname)
  return if filenames.empty?

  expanded_filenames = filenames.map do |f|
    f == '-' ? '-' : self.class.expand_path(f.to_s)
  end
  args = [
    self.class.command,
    *Shellwords.split(exiftool_opts),
    '-j',
    '-coordFormat', '%.8f',
    *expanded_filenames
  ]

  json = ''
  begin
    Open3.popen3(*args) do |stdin, stdout, _stderr, wait_thr|
      if io_input
        IO.copy_stream(io_input, stdin)
        stdin.close
      end
      json = stdout.read.to_s.chomp
      wait_thr.value
    end
  rescue Errno::ENOENT
    json = ''
  end

  raise ExiftoolNotInstalled if json == ''

  JSON.parse(json).each do |raw|
    result = Result.new(raw)
    @file2result[result.source_file] = result
  end
end