[Zope-CVS] CVS: Zope - zope.py:1.1.2.1

[Chris McDonough]

Update of /cvs-repository/Zope
In directory cvs.zope.org:/tmp/cvs-serv17315

Added Files:
      Tag: chrism-install-branch
	zope.py 
Log Message:
Overhaul of installer branch.

z2.py is no longer necessary (nor used in the default config).  
In prior iterations of the installer branch, the "controller" process
(zctl) "front-ended" for z2.py, translating environment variables and
command-line options as necessary to pass in to z2.py.

In this iteration, a new file named "zope.py" is responsible for starting
the Zope process.  It reads configuration directives directly and has
the capability to obtain a configuration from a file or via XML-RPC.
z2.py still exists in the branch, but it's unused.

The zope.py file can be used to start Zope, but a nicer front-end
for it is "zctl", which is a heavily-modified offshoot of Tres'
"zopectl".  The zctl module is now generalized enough that it
*might* be able to run on Windows (I haven't tested it, though).

zctl is still a standalone process.  This is to allow for the fact that
Windows doesn't have os.fork (or zctl would have just imported zope.py
and forked).

In order to maintain cross-platform capability, the "logtail" option
of zctl was removed.  We should create a Python "tail" function
to get around this.

Niceties: zctl is able to tell if its Zope is already running (so you
cant inadvertently start it twice).  The Z2.pid file is cleaned up
when Zope exits, also.

A small bug in FindHomes.py was also fixed (dont add SOFTWARE_HOME to
sys.path if it's already in there).  Additionally, zdaemon was modified
so that if a child Zope process exits with error code 255, the daemon
process does not restart it (not strictly necessary, but nice to have).


=== Added File Zope/zope.py ===
##############################################################################
#
# Copyright (c) 2001 Zope Corporation and Contributors. All Rights Reserved.
#
# This software is subject to the provisions of the Zope Public License,
# Version 2.0 (ZPL).  A copy of the ZPL should accompany this distribution.
# THIS SOFTWARE IS PROVIDED "AS IS" AND ANY AND ALL EXPRESS OR IMPLIED
# WARRANTIES ARE DISCLAIMED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
# WARRANTIES OF TITLE, MERCHANTABILITY, AGAINST INFRINGEMENT, AND FITNESS
# FOR A PARTICULAR PURPOSE
#
##############################################################################
"""This is a replacement for z2.py which uses a config file or
a config retrieved via XML-RPC directly.

Do not change this file unless you know what you're doing. ;-)
"""

import os, sys, getopt, warnings, traceback

# assume that this file is sys.argv[0], and that it lives in ZOPE_HOME in
# order to set sys.path appropriately so we can get at the Controller
# package.
HERE = os.path.split(os.path.abspath(os.path.normpath(sys.argv[0])))[0]
SOFTWARE_HOME = os.path.join(HERE, 'lib', 'python')

# an importer may have already set SOFTWARE_HOME
if SOFTWARE_HOME not in sys.path:
    sys.path.insert(0, SOFTWARE_HOME)

from Controller import Main

def check_python_version():
    # check for Python version
    python_version = sys.version.split()[0]
    if python_version < '2.1':
        raise 'Invalid python version', python_version
    if python_version[:3] == '2.1':
        if python_version[4:5] < '3':
            err = ('You are running Python version %s.  This Python version '
                   'has known bugs that may cause Zope to run improperly. '
                   'Consider upgrading to a Python in the 2.1 series '
                   'with at least version number 2.1.3.  (Note that Zope does '
                   'not yet run under any Python 2.2 version).' %
                   python_version)
            warnings.warn(err)
    if python_version[:3] == '2.2':
        err = ('You are running Python version %s.  This Python version '
               'has not yet been tested with Zope and you may experience '
               'operational problems as a result.  Consider using '
               'Python 2.1.3 instead.' % python_version)
        warnings.warn(err)

def usage():
    print """
zope.py [--config-file=filename] [--config-url=url]

zope.py starts a Zope instance.

If no config- options are passed, an attempt is made to obtain configuration
info from a file in the current working directory named 'zope.conf'.  If both
a configuration url and a configuration filename are specified, the
configuration url is used and the filename is ignored.  The url should point
to a valid XML-RPC server methodname and the XML-RPC server method should
return a dictionary of configuration directives in the same format as
a configuration file.
""" % {'me':sys.argv[0]}

if __name__ == '__main__':
    check_python_version()
    filename = 'zope.conf'
    url = None
    longopts = [ "help", "config-file=", "config-url=" ]
    try:
        opts, args = getopt.getopt(sys.argv[1:], "h", longopts)
    except getopt.GetoptError, v:
        print v
        usage()
        sys.exit(127)
    for k, v in opts:
        if k in ('-h', '--help'):
            usage()
            sys.exit(0)
        if k == '--config-file':
            filename = v
        if k == '--config-url':
            url = v
    if url:
        local_config = Main.get_xmlrpc_config(url)
    else:
        local_config = Main.parse_config_file(filename)
    try:
        config = Main.Configuration(local_config)
        config.activate()
        Main.start_zope(config)
    except SystemExit:
        pass
    except:
        try:
            import zLOG
            zLOG.LOG("Zope Initialization", zLOG.PANIC, "Startup exception",
                     error=sys.exc_info())
        except:
            pass
        traceback.print_exc()
        # tell zdaemon not to restart us by setting 255 exit code
        sys.exit(255)