Class: FileUtils::Entry_

Inherits:
Object
  • Object
show all
Includes:
StreamUtils_
Defined in:
lib/fileutils.rb

Overview

:nodoc: internal use only

Constant Summary collapse

S_IF_DOOR = 
0xD000

Instance Method Summary collapse

Constructor Details

#initialize(a, b = nil, deref = false) ⇒ Entry_

Returns a new instance of Entry_.



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# File 'lib/fileutils.rb', line 1203

def initialize(a, b = nil, deref = false)
  @prefix = @rel = @path = nil
  if b
    @prefix = a
    @rel = b
  else
    @path = a
  end
  @deref = deref
  @stat = nil
  @lstat = nil
end

Instance Method Details

#blockdev? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/fileutils.rb', line 1269

def blockdev?
  s = lstat!
  s and s.blockdev?
end

#chardev? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/fileutils.rb', line 1264

def chardev?
  s = lstat!
  s and s.chardev?
end

#chmod(mode) ⇒ Object 



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# File 'lib/fileutils.rb', line 1342

def chmod(mode)
  if symlink?
    File.lchmod mode, path() if have_lchmod?
  else
    File.chmod mode, path()
  end
rescue Errno::EOPNOTSUPP
end

#chown(uid, gid) ⇒ Object 



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# File 'lib/fileutils.rb', line 1351

def chown(uid, gid)
  if symlink?
    File.lchown uid, gid, path() if have_lchown?
  else
    File.chown uid, gid, path()
  end
end

#copy(dest) ⇒ Object 



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# File 'lib/fileutils.rb', line 1375

def copy(dest)
  lstat
  case
  when file?
    copy_file dest
  when directory?
    if !File.exist?(dest) and descendant_directory?(dest, path)
      raise ArgumentError, "cannot copy directory %s to itself %s" % [path, dest]
    end
    begin
      Dir.mkdir dest
    rescue
      raise unless File.directory?(dest)
    end
  when symlink?
    File.symlink File.readlink(path()), dest
  when chardev?, blockdev?
    raise "cannot handle device file"
  when socket?
    begin
      require 'socket'
    rescue LoadError
      raise "cannot handle socket"
    else
      raise "cannot handle socket" unless defined?(UNIXServer)
    end
    UNIXServer.new(dest).close
    File.chmod lstat().mode, dest
  when pipe?
    raise "cannot handle FIFO" unless File.respond_to?(:mkfifo)
    File.mkfifo dest, lstat().mode
  when door?
    raise "cannot handle door: #{path()}"
  else
    raise "unknown file type: #{path()}"
  end
end

#copy_file(dest) ⇒ Object 



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# File 'lib/fileutils.rb', line 1413

def copy_file(dest)
  File.open(path()) do |s|
    File.open(dest, 'wb', s.stat.mode) do |f|
      IO.copy_stream(s, f)
    end
  end
end

#copy_metadata(path) ⇒ Object 



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# File 'lib/fileutils.rb', line 1421

def copy_metadata(path)
  st = lstat()
  if !st.symlink?
    File.utime st.atime, st.mtime, path
  end
  mode = st.mode
  begin
    if st.symlink?
      begin
        File.lchown st.uid, st.gid, path
      rescue NotImplementedError
      end
    else
      File.chown st.uid, st.gid, path
    end
  rescue Errno::EPERM, Errno::EACCES
    # clear setuid/setgid
    mode &= 01777
  end
  if st.symlink?
    begin
      File.lchmod mode, path
    rescue NotImplementedError, Errno::EOPNOTSUPP
    end
  else
    File.chmod mode, path
  end
end

#dereference? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/fileutils.rb', line 1236

def dereference?
  @deref
end

#directory? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/fileutils.rb', line 1254

def directory?
  s = lstat!
  s and s.directory?
end

#door? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/fileutils.rb', line 1286

def door?
  s = lstat!
  s and (s.mode & 0xF000 == S_IF_DOOR)
end

#entries ⇒ Object 



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# File 'lib/fileutils.rb', line 1291

def entries
  opts = {}
  opts[:encoding] = fu_windows? ? ::Encoding::UTF_8 : path.encoding

  files = if Dir.respond_to?(:children)
    Dir.children(path, **opts)
  else
    Dir.entries(path(), **opts)
       .reject {|n| n == '.' or n == '..' }
  end

  untaint = RUBY_VERSION < '2.7'
  files.map {|n| Entry_.new(prefix(), join(rel(), untaint ? n.untaint : n)) }
end

#exist? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/fileutils.rb', line 1240

def exist?
  begin
    lstat
    true
  rescue Errno::ENOENT
    false
  end
end

#file? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/fileutils.rb', line 1249

def file?
  s = lstat!
  s and s.file?
end

#inspect ⇒ Object 



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# File 'lib/fileutils.rb', line 1216

def inspect
  "\#<#{self.class} #{path()}>"
end

#link(dest) ⇒ Object 



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# File 'lib/fileutils.rb', line 1359

def link(dest)
  case
  when directory?
    if !File.exist?(dest) and descendant_directory?(dest, path)
      raise ArgumentError, "cannot link directory %s to itself %s" % [path, dest]
    end
    begin
      Dir.mkdir dest
    rescue
      raise unless File.directory?(dest)
    end
  else
    File.link path(), dest
  end
end

#lstat ⇒ Object 



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# File 'lib/fileutils.rb', line 1328

def lstat
  if dereference?
    @lstat ||= File.stat(path())
  else
    @lstat ||= File.lstat(path())
  end
end

#lstat! ⇒ Object 



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# File 'lib/fileutils.rb', line 1336

def lstat!
  lstat()
rescue SystemCallError
  nil
end

#path ⇒ Object 



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# File 'lib/fileutils.rb', line 1220

def path
  if @path
    File.path(@path)
  else
    join(@prefix, @rel)
  end
end

#pipe? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/fileutils.rb', line 1279

def pipe?
  s = lstat!
  s and s.pipe?
end

#platform_support ⇒ Object 



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# File 'lib/fileutils.rb', line 1470

def platform_support
  return yield unless fu_windows?
  first_time_p = true
  begin
    yield
  rescue Errno::ENOENT
    raise
  rescue => err
    if first_time_p
      first_time_p = false
      begin
        File.chmod 0700, path()   # Windows does not have symlink
        retry
      rescue SystemCallError
      end
    end
    raise err
  end
end

#postorder_traverse ⇒ Object 



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# File 'lib/fileutils.rb', line 1500

def postorder_traverse
  if directory?
    entries().each do |ent|
      ent.postorder_traverse do |e|
        yield e
      end
    end
  end
ensure
  yield self
end

#prefix ⇒ Object 



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# File 'lib/fileutils.rb', line 1228

def prefix
  @prefix || @path
end

#preorder_traverse ⇒ Object Also known as: traverse 



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# File 'lib/fileutils.rb', line 1490

def preorder_traverse
  stack = [self]
  while ent = stack.pop
    yield ent
    stack.concat ent.entries.reverse if ent.directory?
  end
end

#rel ⇒ Object 



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# File 'lib/fileutils.rb', line 1232

def rel
  @rel
end

#remove ⇒ Object 



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# File 'lib/fileutils.rb', line 1450

def remove
  if directory?
    remove_dir1
  else
    remove_file
  end
end

#remove_dir1 ⇒ Object 



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# File 'lib/fileutils.rb', line 1458

def remove_dir1
  platform_support {
    Dir.rmdir path().chomp(?/)
  }
end

#remove_file ⇒ Object 



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# File 'lib/fileutils.rb', line 1464

def remove_file
  platform_support {
    File.unlink path
  }
end

#socket? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/fileutils.rb', line 1274

def socket?
  s = lstat!
  s and s.socket?
end

#stat ⇒ Object 



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# File 'lib/fileutils.rb', line 1306

def stat
  return @stat if @stat
  if lstat() and lstat().symlink?
    @stat = File.stat(path())
  else
    @stat = lstat()
  end
  @stat
end

#stat! ⇒ Object 



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# File 'lib/fileutils.rb', line 1316

def stat!
  return @stat if @stat
  if lstat! and lstat!.symlink?
    @stat = File.stat(path())
  else
    @stat = lstat!
  end
  @stat
rescue SystemCallError
  nil
end

#symlink? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/fileutils.rb', line 1259

def symlink?
  s = lstat!
  s and s.symlink?
end

#wrap_traverse(pre, post) ⇒ Object 



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# File 'lib/fileutils.rb', line 1512

def wrap_traverse(pre, post)
  pre.call self
  if directory?
    entries.each do |ent|
      ent.wrap_traverse pre, post
    end
  end
  post.call self
end