efortuna@google.com
01fb2bbc86
BUG= Review URL: https://codereview.chromium.org//11691009 git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge/dart@16557 260f80e4-7a28-3924-810f-c04153c831b5
86 lines
2.0 KiB
Python
86 lines
2.0 KiB
Python
#!/usr/bin/python
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# Copyright (c) 2011, the Dart project authors. Please see the AUTHORS file
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# for details. All rights reserved. Use of this source code is governed by a
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# BSD-style license that can be found in the LICENSE file.
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"""Templating to help generate structured text."""
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import os
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import re
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import emitter
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import logging
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_logger = logging.getLogger('multiemitter')
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class MultiEmitter(object):
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"""A set of Emitters that write to different files.
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Each entry has a key.
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file --> emitter
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key --> emitter
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"""
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def __init__(self):
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self._key_to_emitter = {} # key -> Emitter
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self._filename_to_emitter = {} # filename -> Emitter
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def FileEmitter(self, filename, key=None):
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"""Creates an emitter for writing to a file.
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When this MultiEmitter is flushed, the contents of the emitter are written
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to the file.
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Arguments:
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filename: a string, the path name of the file
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key: provides an access key to retrieve the emitter.
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Returns: the emitter.
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"""
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e = emitter.Emitter()
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self._filename_to_emitter[filename] = e
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if key:
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self.Associate(key, e)
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return e
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def Associate(self, key, emitter):
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"""Associates a key with an emitter."""
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self._key_to_emitter[key] = emitter
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def Find(self, key):
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"""Returns the emitter associated with |key|."""
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return self._key_to_emitter[key]
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def Flush(self, writer=None):
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"""Writes all pending files.
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Arguments:
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writer: a function called for each file and it's lines.
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"""
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if not writer:
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writer = _WriteFile
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for file in sorted(self._filename_to_emitter.keys()):
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emitter = self._filename_to_emitter[file]
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writer(file, emitter.Fragments())
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def _WriteFile(path, lines):
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(dir, file) = os.path.split(path)
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# Ensure dir exists.
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if dir:
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if not os.path.isdir(dir):
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os.makedirs(dir)
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# Remove file if pre-existing.
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if os.path.exists(path):
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os.remove(path)
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# Write the file.
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# _logger.info('Flushing - %s' % path)
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f = open(path, 'w')
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f.writelines(lines)
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f.close()
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