Class: Listen::Record

Inherits:
Object
  • Object
show all
Includes:
Celluloid
Defined in:
lib/listen/record.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(listener) ⇒ Record

Returns a new instance of Record.



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# File 'lib/listen/record.rb', line 10

def initialize(listener)
  @listener = listener
  @paths    = _auto_hash
end

Instance Attribute Details

#listener ⇒ Object

TODO: deprecate



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# File 'lib/listen/record.rb', line 8

def listener
  @listener
end

#paths ⇒ Object

TODO: deprecate



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# File 'lib/listen/record.rb', line 8

def paths
  @paths
end

Instance Method Details

#_auto_hash ⇒ Object (private) 



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# File 'lib/listen/record.rb', line 78

def _auto_hash
  Hash.new { |h, k| h[k] = Hash.new }
end

#_fast_build(root) ⇒ Object (private) 



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# File 'lib/listen/record.rb', line 100

def _fast_build(root)
  @paths[root] = _auto_hash
  left = Queue.new
  left << '.'

  while !left.empty?
    dirname = left.pop
    add_dir(root, dirname)

    path = ::File.join(root, dirname)
    current = Dir.entries(path.to_s) - %w(. ..)

    current.each do |entry|
      full_path = ::File.join(path, entry)

      if Dir.exist?(full_path)
        left << (dirname == '.' ? entry : ::File.join(dirname, entry))
      else
        begin
          lstat = ::File.lstat(full_path)
          data = { mtime: lstat.mtime.to_f, mode: lstat.mode }
          _fast_update_file(root, dirname, entry, data)
        rescue SystemCallError
          _fast_unset_path(root, dirname, entry)
        end
      end
    end
  end
end

#_fast_unset_path(dir, dirname, basename) ⇒ Object (private) 



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# File 'lib/listen/record.rb', line 92

def _fast_unset_path(dir, dirname, basename)
  root = @paths[dir.to_s]
  # this may need to be reworked to properly remove
  # entries from a tree, without adding non-existing dirs to the record
  return unless root.key?(dirname)
  root[dirname].delete(basename)
end

#_fast_update_file(dir, dirname, basename, data) ⇒ Object (private) 



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# File 'lib/listen/record.rb', line 82

def _fast_update_file(dir, dirname, basename, data)
  root = @paths[dir.to_s]
  if [nil, '', '.'].include? dirname
    root[basename] = (root[basename] || {}).merge(data)
  else
    root[dirname] ||= {}
    root[dirname][basename] = (root[dirname][basename] || {}).merge(data)
  end
end

#add_dir(dir, rel_path) ⇒ Object 



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# File 'lib/listen/record.rb', line 15

def add_dir(dir, rel_path)
  return if [nil, '', '.'].include? rel_path
  @paths[dir.to_s][rel_path] ||= {}
end

#build ⇒ Object 



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# File 'lib/listen/record.rb', line 61

def build
  start = Time.now.to_f
  @paths = _auto_hash

  # TODO: refactor this out (1 Record = 1 watched dir)
  listener.directories.each do |directory|
    _fast_build(directory.to_s)
  end

  Celluloid.logger.info "Record.build took #{Time.now.to_f - start} seconds"
rescue
  Celluloid.logger.warn "build crashed: #{$!.inspect}"
  raise
end

#dir_entries(dir, rel_path) ⇒ Object 



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# File 'lib/listen/record.rb', line 45

def dir_entries(dir, rel_path)
  tree = if [nil, '', '.'].include? rel_path.to_s
           @paths[dir.to_s]
         else
           @paths[dir.to_s][rel_path.to_s] ||= _auto_hash
           @paths[dir.to_s][rel_path.to_s]
         end

  result = {}
  tree.each do |key, values|
    # only get data for file entries
    result[key] = values.key?(:mtime) ? values : {}
  end
  result
end

#file_data(dir, rel_path) ⇒ Object 



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# File 'lib/listen/record.rb', line 32

def file_data(dir, rel_path)
  root = @paths[dir.to_s]
  dirname, basename = Pathname(rel_path).split.map(&:to_s)
  if [nil, '', '.'].include? dirname
    root[basename] ||= {}
    root[basename].dup
  else
    root[dirname] ||= {}
    root[dirname][basename] ||= {}
    root[dirname][basename].dup
  end
end

#unset_path(dir, rel_path) ⇒ Object 



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# File 'lib/listen/record.rb', line 25

def unset_path(dir, rel_path)
  dirname, basename = Pathname(rel_path).split.map(&:to_s)

  @paths[dir.to_s][dirname] ||= {}
  _fast_unset_path(dir, dirname, basename)
end

#update_file(dir, rel_path, data) ⇒ Object 



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# File 'lib/listen/record.rb', line 20

def update_file(dir, rel_path, data)
  dirname, basename = Pathname(rel_path).split.map(&:to_s)
  _fast_update_file(dir, dirname, basename, data)
end