Moved most of html lib generating scripts into tools.

sdk/lib/html/scripts/multiemitter.py

-#!/usr/bin/python
-# Copyright (c) 2011, the Dart project authors.  Please see the AUTHORS file
-# for details. All rights reserved. Use of this source code is governed by a
-# BSD-style license that can be found in the LICENSE file.
-
-"""Templating to help generate structured text."""
-
-import os
-import re
-import emitter
-import logging
-
-_logger = logging.getLogger('multiemitter')
-
-class MultiEmitter(object):
-  """A set of Emitters that write to different files.
-
-  Each entry has a key.
-
-  file --> emitter
-  key --> emitter
-
-  """
-
-  def __init__(self):
-    self._key_to_emitter = {}     # key -> Emitter
-    self._filename_to_emitter = {}    # filename -> Emitter
-
-
-  def FileEmitter(self, filename, key=None):
-    """Creates an emitter for writing to a file.
-
-    When this MultiEmitter is flushed, the contents of the emitter are written
-    to the file.
-
-    Arguments:
-      filename: a string, the path name of the file
-      key: provides an access key to retrieve the emitter.
-
-    Returns: the emitter.
-    """
-    e = emitter.Emitter()
-    self._filename_to_emitter[filename] = e
-    if key:
-      self.Associate(key, e)
-    return e
-
-  def Associate(self, key, emitter):
-    """Associates a key with an emitter."""
-    self._key_to_emitter[key] = emitter
-
-  def Find(self, key):
-    """Returns the emitter associated with |key|."""
-    return self._key_to_emitter[key]
-
-  def Flush(self, writer=None):
-    """Writes all pending files.
-
-    Arguments:
-      writer: a function called for each file and it's lines.
-    """
-    if not writer:
-      writer = _WriteFile
-    for file in sorted(self._filename_to_emitter.keys()):
-      emitter = self._filename_to_emitter[file]
-      writer(file, emitter.Fragments())
-
-
-def _WriteFile(path, lines):
-  (dir, file) = os.path.split(path)
-
-  # Ensure dir exists.
-  if dir:
-    if not os.path.isdir(dir):
-      os.makedirs(dir)
-
-  # Remove file if pre-existing.
-  if os.path.exists(path):
-    os.remove(path)
-
-  # Write the file.
-  # _logger.info('Flushing - %s' % path)
-  f = open(path, 'w')
-  f.writelines(lines)
-  f.close()