docs: def convertforinput(self,filepath, metadata=None):
          """Convert from target format into one of the source formats. Relevant if converters are used in InputTemplates. Metadata already is metadata for the to-be-generated file."""
          super(CharEncodingConverter,self).convertforinput(filepath, metadata)
  
          shutil.copy(filepath, filepath + '.convertsource')
  
          try:
              fsource = io.open(filepath + '.convertsource','r',encoding=self.charset)
              ftarget = io.open(filepath,'w',encoding=metadata['encoding'])
              for line in fsource:
                  ftarget.write(line + "\n")
              success = True
          except:
              ftarget.close()
              fsource.fclose()
              success = False
          finally:
              os.unlink(filepath + '.convertsource')
  
          return success