Method: Fuzz.update_file_object

Defined in:

lib/fuzz/fuzz.rb

.update_file_object(fo) ⇒ Object

# File 'lib/fuzz/fuzz.rb', line 278

def self.update_file_object(fo)
  if File.writable?(fo.fullpath)
    log_verbose(%Q{Updating #{fo}...})
    ftmp = Tempfile.new(fo.name)
    log_verbose(%Q{+ Writing temp file #{ftmp.path}...})
    fo.lines.each { |ln| ftmp.print ln }
    ftmp.close(false) # close but do NOT unlink
    log_verbose(%Q{+ Replacing #{fo} with #{ftmp.path}})
    # create temporary backup
    ftmp2 = Tempfile.new(fo.name)
    ftmp2_name = ftmp2.path.dup
    ftmp2.close(true)
    mv(fo.fullpath, ftmp2_name)
    # replace original
    begin
      mv(ftmp.path, fo.fullpath)
      # preserve file mode
      chmod(File.lstat(ftmp2_name).mode, fo.fullpath)
    rescue
      log_error(%Q{FAILED updating #{fo}: #{$!}})
      # restore backup
      mv(ftmp2_name, fo.fullpath)
      raise
    end
    # remove backup
    File.unlink(ftmp2_name)
    log_verbose(%Q{Finished updating #{fo}.})
    return true
  else
    log_error(%Q{NO_ACCESS - cannot update #{fo}})
    return false
  end
end