Class: File

Inherits:
Object show all
Defined in:
lib/rwd/ftools.rb,
lib/zip/stdrubyext.rb

Direct Known Subclasses

BugFix::Tempfile

Class Method Summary collapse

Class Method Details

.read(fileName) ⇒ Object

singleton method read does not exist in 1.6.x


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# File 'lib/zip/stdrubyext.rb', line 29

def self.read(fileName)
  open(fileName) { |f| f.read }
end

.rollbackup(file, mode = nil) ⇒ Object


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# File 'lib/rwd/ftools.rb', line 92

def self.rollbackup(file, mode=nil)
  backupfile	= file + ".RB.BACKUP"
  controlfile	= file + ".RB.CONTROL"
  res		= nil

  File.touch(file)    unless File.file?(file)

	# Rollback

  if File.file?(backupfile) and File.file?(controlfile)
    $stderr.puts "Restoring #{file}..."

    File.copy(backupfile, file)				# Rollback from phase 3
  end

	# Reset

  File.delete(backupfile)	if File.file?(backupfile)	# Reset from phase 2 or 3
  File.delete(controlfile)	if File.file?(controlfile)	# Reset from phase 3 or 4

	# Backup

  File.copy(file, backupfile)					# Enter phase 2
  File.touch(controlfile)					# Enter phase 3

	# The real thing

  if block_given?
    if mode.nil?
      res	= yield
    else
      File.open(file, mode) do |f|
        res	= yield(f)
      end
    end
  end

	# Cleanup

  File.delete(backupfile)					# Enter phase 4
  File.delete(controlfile)					# Enter phase 5

	# Return, like File.open

  res	= File.open(file, (mode or "r"))	unless block_given?

  res
end

.touch(file) ⇒ Object


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# File 'lib/rwd/ftools.rb', line 141

def self.touch(file)
  if File.exists?(file)
    File.utime(Time.now, File.mtime(file), file)
  else
    File.open(file, "a"){|f|}
  end
end

.which(file) ⇒ Object


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# File 'lib/rwd/ftools.rb', line 149

def self.which(file)
  res	= nil

  if windows?
    file	= file.gsub(/\.exe$/i, "") + ".exe"
    sep		= ";"
  else
    sep		= ":"
  end

  catch :stop do
    ENV["PATH"].split(/#{sep}/).reverse.each do |d|
      if File.directory?(d)
        Dir.new(d).each do |e|
           if e.downcase == file.downcase
             res	= File.expand_path(e, d)
             throw :stop
          end
        end
      end
    end
  end

  res
end