Module: Mir::Utils

Defined in:
lib/mir/utils.rb

Class Method Summary collapse

Class Method Details

.filename_with_sequence(name, seq) ⇒ Object

Generates filename for a split file filename_with_sequence(“foobar.txt”, 23) => foobar.txt.00000023

Parameters:

  • filename (String)
  • the (Integer) —

    sequence number



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# File 'lib/mir/utils.rb', line 8

def self.filename_with_sequence(name, seq)
  [name, ".", "%08d" % seq].join
end

.recombine(source_dir, dest) ⇒ Object

Recombines a file from pieces

Parameters:

  • the (String) —

    directory that holds the split files

  • the (String) —

    path to the assembled file



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# File 'lib/mir/utils.rb', line 39

def self.recombine(source_dir, dest)
  parts = Dir.glob(File.join(source_dir, "*"))
  open(File.expand_path(dest), "wb") do |file|
    parts.each do |part|
      p_io = File.new(part)
      file.write p_io.read
    end
  end
end

.split_file(file, chunk_size, dest) ⇒ Object

Splits a file into pieces that may be reassembled later

Parameters:

  • File (File or String) —

    to be split

  • the (Integer) —

    number of bytes per each chunked file

  • where (String) —

    the split files should be stored



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# File 'lib/mir/utils.rb', line 20

def self.split_file(file, chunk_size, dest)
  try_create_dir(dest) unless Dir.exist?(dest)
  
  fname = File.join(dest, File.basename(file))
  seq = 1
  
  open(file, "rb") do |f|
    while split_data = f.read(chunk_size) do
      split_name = self.filename_with_sequence(fname, seq)
      open(split_name, "wb") { |dest| dest.write(split_data) }
      seq += 1
    end
  end
end

.try_create_dir(path) ⇒ Object 



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# File 'lib/mir/utils.rb', line 12

def self.try_create_dir(path)
  Dir.mkdir(path) unless Dir.exist?(path)
end