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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,139 @@ | ||
| # 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 ([email protected]) | ||
| # 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, signal | ||
|
|
||
| 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 | ||
|
|
||
| try: | ||
| import termios | ||
| except ImportError: | ||
| termios = None | ||
|
|
||
| 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 ensure_echo_on(): | ||
| if termios: | ||
| fd = sys.stdin | ||
| if fd.isatty(): | ||
| attr_list = termios.tcgetattr(fd) | ||
| if not attr_list[3] & termios.ECHO: | ||
| attr_list[3] |= termios.ECHO | ||
| if hasattr(signal, 'SIGTTOU'): | ||
| old_handler = signal.signal(signal.SIGTTOU, signal.SIG_IGN) | ||
| else: | ||
| old_handler = None | ||
| termios.tcsetattr(fd, termios.TCSANOW, attr_list) | ||
| if old_handler is not None: | ||
| signal.signal(signal.SIGTTOU, old_handler) | ||
|
|
||
| def reloader_thread(): | ||
| ensure_echo_on() | ||
| while RUN_RELOADER: | ||
| if code_changed(): | ||
| sys.exit(3) # force reload | ||
| time.sleep(1) | ||
|
|
||
| def restart_with_reloader(): | ||
| while True: | ||
| args = [sys.executable] + ['-W%s' % o for o in sys.warnoptions] + 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) | ||
|
|