author | Todd Larsen <tlarsen@google.com> |
Fri, 29 Aug 2008 02:52:02 +0000 | |
changeset 122 | 95d0d954fe0b |
parent 54 | 03e267d67478 |
child 323 | ff1a9aa48cfd |
permissions | -rw-r--r-- |
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# Autoreloading launcher. |
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# Borrowed from Peter Hunt and the CherryPy project (http://www.cherrypy.org). |
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# Some taken from Ian Bicking's Paste (http://pythonpaste.org/). |
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# |
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# Portions copyright (c) 2004, CherryPy Team (team@cherrypy.org) |
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# All rights reserved. |
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# |
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# Redistribution and use in source and binary forms, with or without modification, |
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# are permitted provided that the following conditions are met: |
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# |
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# * Redistributions of source code must retain the above copyright notice, |
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# this list of conditions and the following disclaimer. |
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# * Redistributions in binary form must reproduce the above copyright notice, |
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# this list of conditions and the following disclaimer in the documentation |
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# and/or other materials provided with the distribution. |
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# * Neither the name of the CherryPy Team nor the names of its contributors |
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# may be used to endorse or promote products derived from this software |
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# without specific prior written permission. |
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# |
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# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND |
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# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED |
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# WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE |
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# DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE |
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# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
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# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR |
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# SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER |
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# CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, |
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# OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
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# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
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|
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import os, sys, time |
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|
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try: |
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import thread |
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except ImportError: |
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import dummy_thread as thread |
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|
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# This import does nothing, but it's necessary to avoid some race conditions |
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# in the threading module. See http://code.djangoproject.com/ticket/2330 . |
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try: |
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import threading |
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except ImportError: |
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pass |
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RUN_RELOADER = True |
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def reloader_thread(): |
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mtimes = {} |
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win = (sys.platform == "win32") |
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while RUN_RELOADER: |
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for filename in filter(lambda v: v, map(lambda m: getattr(m, "__file__", None), sys.modules.values())): |
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if filename.endswith(".pyc") or filename.endswith("*.pyo"): |
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filename = filename[:-1] |
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if not os.path.exists(filename): |
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continue # File might be in an egg, so it can't be reloaded. |
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stat = os.stat(filename) |
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mtime = stat.st_mtime |
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if win: |
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mtime -= stat.st_ctime |
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if filename not in mtimes: |
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mtimes[filename] = mtime |
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continue |
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if mtime != mtimes[filename]: |
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sys.exit(3) # force reload |
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time.sleep(1) |
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def restart_with_reloader(): |
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while True: |
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args = [sys.executable] + sys.argv |
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if sys.platform == "win32": |
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args = ['"%s"' % arg for arg in args] |
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new_environ = os.environ.copy() |
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new_environ["RUN_MAIN"] = 'true' |
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exit_code = os.spawnve(os.P_WAIT, sys.executable, args, new_environ) |
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if exit_code != 3: |
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return exit_code |
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def main(main_func, args=None, kwargs=None): |
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if os.environ.get("RUN_MAIN") == "true": |
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if args is None: |
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args = () |
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if kwargs is None: |
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kwargs = {} |
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thread.start_new_thread(main_func, args, kwargs) |
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try: |
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reloader_thread() |
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except KeyboardInterrupt: |
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pass |
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else: |
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try: |
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sys.exit(restart_with_reloader()) |
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except KeyboardInterrupt: |
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pass |