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