Class: Vfs::Dir

Inherits:
Entry show all
Defined in:
lib/vfs/entries/dir.rb

Instance Attribute Summary

Attributes inherited from Entry

#driver, #path, #path_cache

Instance Method Summary collapse

Methods inherited from Entry

#==, #created_at, #delete, #dir, #dir?, #entry, #eql?, #file, #file?, #get, #hash, #initialize, #inspect, #local?, #name, #parent, #set, #tmp, #updated_at

Constructor Details

This class inherits a constructor from Vfs::Entry

Instance Method Details

#[](path) ⇒ Object Also known as: /

Container



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# File 'lib/vfs/entries/dir.rb', line 6

def [] path
  path = path.to_s
  if path =~ /.+[\/]$/
    path = path.sub /\/$/, ''
    dir path
  elsif path =~ /\*/
    entries path
  else
    entry path
  end
end

#copy_to(to, options = {}) ⇒ Object

Transfers

Raises:



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# File 'lib/vfs/entries/dir.rb', line 145

def copy_to to, options = {}
  options[:bang] = true unless options.include? :bang

  raise Error, "invalid argument, destination should be a Entry (#{to})!" unless to.is_a? Entry
  raise Error, "you can't copy to itself" if self == to

  target = if to.is_a? File
    to.dir
  elsif to.is_a? Dir
    to.dir #(name)
  elsif to.is_a? UniversalEntry
    # raise "can't copy Dir to File ('#{self}')!" if to.file? and !options[:override]
    to.dir #.create
  else
    raise "can't copy to unknown Entry!"
  end

  # efficient_dir_copy(target, options) || unefficient_dir_copy(target, options)
  unefficient_dir_copy(target, options)

  target
end

#create(options = {}) ⇒ Object

CRUD



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# File 'lib/vfs/entries/dir.rb', line 29

def create options = {}
  driver.open do
    try = 0
    begin
      try += 1
      driver.create_dir path
    rescue StandardError => error
      entry = self.entry
      attrs = entry.get
      if attrs and attrs[:file] #entry.exist?
        entry.destroy
      elsif attrs and attrs[:dir]
        # dir already exist, no need to recreate it
        return self
      else
        parent = self.parent
        if parent.exist?
          # some unknown error
          raise error
        else
          parent.create(options)
        end
      end

      try < 2 ? retry : raise(error)
    end
  end
  self
end

#destroy(options = {}) ⇒ Object



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# File 'lib/vfs/entries/dir.rb', line 59

def destroy options = {}
  destroy_entry :dir, :file
end

#dirs(*args, &block) ⇒ Object



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# File 'lib/vfs/entries/dir.rb', line 121

def dirs *args, &block
  options = args.last.is_a?(Hash) ? args.pop : {}

  options[:filter] = :dir
  args << options
  entries *args, &block
end

#empty?Boolean



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# File 'lib/vfs/entries/dir.rb', line 134

def empty?
  catch :break do
    entries{|e| throw :break, false}
    true
  end
end

#entries(*args, &block) ⇒ Object Also known as: each

Content



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# File 'lib/vfs/entries/dir.rb', line 67

def entries *args, &block
  raise "invalid arguments #{args.inspect}!" if args.size > 2
  options = args.last.is_a?(Hash) ? args.pop : {}
  query = args.first
  options[:bang] = true unless options.include? :bang
  filter = options[:filter]
  type_required = options[:type]

  driver.open do
    begin
      list = []
      # query option is optional and supported only for some drivers (local driver for example)
      driver.each_entry path, query do |name, type|
        # for performance reasons some drivers may return the type of entry as
        # optionally evaluated callback.
        type = type.call if (filter or type_required) and type.is_a?(Proc)

        next if filter and (filter != type)

        entry = if type == :dir
          dir(name)
        elsif type == :file
          file(name)
        else
          entry(name)
        end
        block ? block.call(entry) : (list << entry)
      end
      block ? nil : list
    rescue StandardError => error
      attrs = get
      if attrs and attrs[:file]
        raise Error, "can't query entries on File ('#{self}')!"
      elsif attrs and attrs[:dir]
        # some unknown error
        raise error
      else
        # TODO2 remove :bang
        raise Error, "'#{self}' not exist!" if options[:bang]
        []
      end
    end
  end
end

#files(*args, &block) ⇒ Object



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# File 'lib/vfs/entries/dir.rb', line 113

def files *args, &block
  options = args.last.is_a?(Hash) ? args.pop : {}

  options[:filter] = :file
  args << options
  entries *args, &block
end

#include?(name) ⇒ Boolean Also known as: has?



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# File 'lib/vfs/entries/dir.rb', line 129

def include? name
  entry[name].exist?
end

#move_to(to, options = {}) ⇒ Object



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# File 'lib/vfs/entries/dir.rb', line 168

def move_to to, options = {}
  copy_to to, options
  destroy options
  to
end