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pyoxidizer: produce working Python 3 Windows installers (issue6366)...
pyoxidizer: produce working Python 3 Windows installers (issue6366) While we've had code to produce Python 3 Windows installers with PyOxidizer, we haven't been advertising them on the web site due to a bug in making TLS connections and issues around resource handling. This commit upgrades our PyOxidizer install and configuration to use a recent Git commit of PyOxidizer. This new version of PyOxidizer contains a *ton* of changes, improvements, and bug fixes. Notably, Windows shared distributions now mostly "just work" and the TLS bug and random problems with Python extension modules in the standard library go away. And Python has been upgraded from 3.7 to 3.8.6. The price we pay for this upgrade is a ton of backwards incompatible changes to Starlark. I applied this commit (the overall series actually) on stable to produce Windows installers for Mercurial 5.5.2, which I published shortly before submitting this commit for review. In order to get the stable branch working, I decided to take a less aggressive approach to Python resource management. Previously, we were attempting to load all Python modules from memory and were performing some hacks to copy Mercurial's non-module resources into additional directories in Starlark. This commit implements a resource callback function in Starlark (a new feature since PyOxidizer 0.7) to dynamically assign standard library resources to in-memory loading and all other resources to filesystem loading. This means that Mercurial's files and all the other packages we ship in the Windows installers (e.g. certifi and pygments) are loaded from the filesystem instead of from memory. This avoids issues due to lack of __file__ and enables us to ship a working Python 3 installer on Windows. The end state of the install layout after this patch is not ideal for @: we still copy resource files like templates and help text to directories next to the hg.exe executable. There is code in @ to use importlib.resources to load these files and we could likely remove these copies once this lands on @. But for now, the install layout mimics what we've shipped for seemingly forever and is backwards compatible. It allows us to achieve the milestone of working Python 3 Windows installers and gets us a giant step closer to deleting Python 2. Differential Revision: https://phab.mercurial-scm.org/D9148

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hgwebdir_wsgi.py
140 lines | 4.8 KiB | text/x-python | PythonLexer
# An example WSGI script for IIS/isapi-wsgi to export multiple hgweb repos
# Copyright 2010-2016 Sune Foldager <cyano@me.com>
#
# This software may be used and distributed according to the terms of the
# GNU General Public License version 2 or any later version.
#
# Requirements:
# - Python 2.7, preferably 64 bit
# - Mercurial installed from source (python setup.py install) or download the
# python module installer from https://www.mercurial-scm.org/wiki/Download
# - IIS 7 or newer
#
#
# Installation and use:
#
# - Download or clone the isapi-wsgi source and run python setup.py install.
# https://github.com/hexdump42/isapi-wsgi
#
# - Create a directory to hold the shim dll, config files etc. This can reside
# inside the standard IIS directory, C:\inetpub, or anywhere else. Copy this
# script there.
#
# - Run this script (i.e. python hgwebdir_wsgi.py) to get a shim dll. The
# shim is identical for all scripts, so you can just copy and rename one
# from an earlier run, if you wish. The shim needs to reside in the same
# directory as this script.
#
# - Start IIS manager and create a new app pool:
# .NET CLR Version: No Managed Code
# Advanced Settings: Enable 32 Bit Applications, if using 32 bit Python.
# You can adjust the identity and maximum worker processes if you wish. This
# setup works fine with multiple worker processes.
#
# - Create an IIS application where your hgwebdir is to be served from.
# Assign it the app pool you just created and point its physical path to the
# directory you created.
#
# - In the application, remove all handler mappings and setup a wildcard script
# handler mapping of type IsapiModule with the shim dll as its executable.
# This file MUST reside in the same directory as the shim. The easiest way
# to do all this is to close IIS manager, place a web.config file in your
# directory and start IIS manager again. The file should contain:
#
# <?xml version="1.0" encoding="UTF-8"?>
# <configuration>
# <system.webServer>
# <handlers accessPolicy="Read, Script">
# <clear />
# <add name="hgwebdir" path="*" verb="*" modules="IsapiModule"
# scriptProcessor="C:\your\directory\_hgwebdir_wsgi.dll"
# resourceType="Unspecified" requireAccess="None"
# preCondition="bitness64" />
# </handlers>
# </system.webServer>
# </configuration>
#
# Where "bitness64" should be replaced with "bitness32" for 32 bit Python.
#
# - Edit ISAPI And CGI Restrictions on the web server (global setting). Add a
# restriction pointing to your shim dll and allow it to run.
#
# - Create a configuration file in your directory and adjust the configuration
# variables below to match your needs. Example configuration:
#
# [web]
# style = gitweb
# push_ssl = false
# allow_push = *
# encoding = utf8
#
# [server]
# validate = true
#
# [paths]
# repo1 = c:\your\directory\repo1
# repo2 = c:\your\directory\repo2
#
# - Restart the web server and see if things are running.
#
from __future__ import absolute_import
# Configuration file location
hgweb_config = r'c:\your\directory\wsgi.config'
# Global settings for IIS path translation
path_strip = 0 # Strip this many path elements off (when using url rewrite)
path_prefix = 1 # This many path elements are prefixes (depends on the
# virtual path of the IIS application).
import sys
# Adjust python path if this is not a system-wide install
# sys.path.insert(0, r'C:\your\custom\hg\build\lib.win32-2.7')
# Enable tracing. Run 'python -m win32traceutil' to debug
if getattr(sys, 'isapidllhandle', None) is not None:
import win32traceutil
win32traceutil.SetupForPrint # silence unused import warning
import isapi_wsgi
from mercurial.hgweb.hgwebdir_mod import hgwebdir
# Example tweak: Replace isapi_wsgi's handler to provide better error message
# Other stuff could also be done here, like logging errors etc.
class WsgiHandler(isapi_wsgi.IsapiWsgiHandler):
error_status = '500 Internal Server Error' # less silly error message
isapi_wsgi.IsapiWsgiHandler = WsgiHandler
# Only create the hgwebdir instance once
application = hgwebdir(hgweb_config)
def handler(environ, start_response):
# Translate IIS's weird URLs
url = environ['SCRIPT_NAME'] + environ['PATH_INFO']
paths = url[1:].split('/')[path_strip:]
script_name = '/' + '/'.join(paths[:path_prefix])
path_info = '/'.join(paths[path_prefix:])
if path_info:
path_info = '/' + path_info
environ['SCRIPT_NAME'] = script_name
environ['PATH_INFO'] = path_info
return application(environ, start_response)
def __ExtensionFactory__():
return isapi_wsgi.ISAPISimpleHandler(handler)
if __name__ == '__main__':
from isapi.install import ISAPIParameters, HandleCommandLine
params = ISAPIParameters()
HandleCommandLine(params)