Class: FileUtils::Entry_

Inherits:
Object show all
Includes:
StreamUtils_
Defined in:
lib/extensions/fileutils/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/extensions/fileutils/fileutils.rb', line 1210

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:



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# File 'lib/extensions/fileutils/fileutils.rb', line 1276

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

#chardev? ⇒ Boolean

Returns:



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# File 'lib/extensions/fileutils/fileutils.rb', line 1271

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

#chmod(mode) ⇒ Object 



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

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

#chown(uid, gid) ⇒ Object 



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# File 'lib/extensions/fileutils/fileutils.rb', line 1350

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/extensions/fileutils/fileutils.rb', line 1358

def copy(dest)
  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?
    raise "cannot handle device file" unless File.respond_to?(:mknod)
    mknod dest, ?c, 0666, lstat().rdev
  when blockdev?
    raise "cannot handle device file" unless File.respond_to?(:mknod)
    mknod dest, ?b, 0666, lstat().rdev
  when socket?
    raise "cannot handle socket" unless File.respond_to?(:mknod)
    mknod dest, nil, lstat().mode, 0
  when pipe?
    raise "cannot handle FIFO" unless File.respond_to?(:mkfifo)
    mkfifo dest, 0666
  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/extensions/fileutils/fileutils.rb', line 1392

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/extensions/fileutils/fileutils.rb', line 1400

def copy_metadata(path)
  st = lstat()
  if !st.symlink?
    File.utime st.atime, st.mtime, path
  end
  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
    # clear setuid/setgid
    if st.symlink?
      begin
        File.lchmod st.mode & 01777, path
      rescue NotImplementedError
      end
    else
      File.chmod st.mode & 01777, path
    end
  else
    if st.symlink?
      begin
        File.lchmod st.mode, path
      rescue NotImplementedError
      end
    else
      File.chmod st.mode, path
    end
  end
end

#dereference? ⇒ Boolean

Returns:



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# File 'lib/extensions/fileutils/fileutils.rb', line 1243

def dereference?
  @deref
end

#directory? ⇒ Boolean

Returns:



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# File 'lib/extensions/fileutils/fileutils.rb', line 1261

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

#door? ⇒ Boolean

Returns:



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# File 'lib/extensions/fileutils/fileutils.rb', line 1293

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

#entries ⇒ Object 



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# File 'lib/extensions/fileutils/fileutils.rb', line 1298

def entries
  opts = {}
  opts[:encoding] = ::Encoding::UTF_8 if fu_windows?
  Dir.entries(path(), opts)\
      .reject {|n| n == '.' or n == '..' }\
      .map {|n| Entry_.new(prefix(), join(rel(), n.untaint)) }
end

#exist? ⇒ Boolean

Returns:



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# File 'lib/extensions/fileutils/fileutils.rb', line 1247

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

#file? ⇒ Boolean

Returns:



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# File 'lib/extensions/fileutils/fileutils.rb', line 1256

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

#inspect ⇒ Object 



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# File 'lib/extensions/fileutils/fileutils.rb', line 1223

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

#lstat ⇒ Object 



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

def lstat!
  lstat()
rescue SystemCallError
  nil
end

#path ⇒ Object 



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# File 'lib/extensions/fileutils/fileutils.rb', line 1227

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

#pipe? ⇒ Boolean

Returns:



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

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

#platform_support ⇒ Object 



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# File 'lib/extensions/fileutils/fileutils.rb', line 1456

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/extensions/fileutils/fileutils.rb', line 1486

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/extensions/fileutils/fileutils.rb', line 1235

def prefix
  @prefix || @path
end

#preorder_traverse ⇒ Object Also known as: traverse 



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# File 'lib/extensions/fileutils/fileutils.rb', line 1476

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/extensions/fileutils/fileutils.rb', line 1239

def rel
  @rel
end

#remove ⇒ Object 



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# File 'lib/extensions/fileutils/fileutils.rb', line 1436

def remove
  if directory?
    remove_dir1
  else
    remove_file
  end
end

#remove_dir1 ⇒ Object 



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# File 'lib/extensions/fileutils/fileutils.rb', line 1444

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

#remove_file ⇒ Object 



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

def remove_file
  platform_support {
    File.unlink path
  }
end

#socket? ⇒ Boolean

Returns:



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# File 'lib/extensions/fileutils/fileutils.rb', line 1281

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

#stat ⇒ Object 



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# File 'lib/extensions/fileutils/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/extensions/fileutils/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:



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# File 'lib/extensions/fileutils/fileutils.rb', line 1266

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

#wrap_traverse(pre, post) ⇒ Object 



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# File 'lib/extensions/fileutils/fileutils.rb', line 1498

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