Class: RedSnapper

Inherits:
Object
  • Object
show all
Defined in:
lib/redsnapper.rb

Constant Summary collapse

TARSNAP = 
'tarsnap'
THREAD_POOL_SIZE = 
10
MAX_FILES_PER_JOB = 
1000

Instance Method Summary collapse

Constructor Details

#initialize(archive, options = {}) ⇒ RedSnapper

Returns a new instance of RedSnapper.



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# File 'lib/redsnapper.rb', line 10

def initialize(archive, options = {})
  @archive = archive
  @options = options
end

Instance Method Details

#file_groups ⇒ Object 



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# File 'lib/redsnapper.rb', line 15

def file_groups
  command = [ TARSNAP, '-tf', @archive, *@options[:tarsnap_options] ]
  command.push(@options[:directory]) if @options[:directory]

  files = []
  dirs = Set.new

  Open3.popen3(*command) do |_, out, _|
    out.gets(nil).split("\n").each do |entry|
      if entry.end_with?('/')
        dirs.add(entry)
      else
        files.push(entry)
      end
    end
  end

  files.each { |f| dirs.delete(File.dirname(f) + '/') }
  empty_dirs = dirs.clone

  dirs.each do |dir|
    components = dir.split('/')
    components.each_with_index do |component, i|
      empty_dirs.delete(components[0, i].join('/') + '/')
    end
  end

  files.push(*empty_dirs)
  files.each_slice([ (files.size.to_f / THREAD_POOL_SIZE).ceil, MAX_FILES_PER_JOB ].min).to_a
end

#run ⇒ Object 



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# File 'lib/redsnapper.rb', line 46

def run
  pool = Thread.pool(THREAD_POOL_SIZE)
  mutex = Mutex.new

  file_groups.each do |chunk|
    pool.process do
      command = [ TARSNAP, '-xvf', @archive, *(@options[:tarsnap_options] + chunk) ]
      Open3.popen3(*command) do |_, _, err|
        while line = err.gets
          mutex.synchronize { warn line.chomp }
        end
      end
    end
  end

  pool.shutdown
end