Mercurial > hg
view doc/runrst @ 41506:3e89736b98ce
py3: conditionalize test-demandimport.py for Python 3
The Python 3 lazy importer uses the LazyLoader that is part of
importlib.
On Python 3 and later, LazyLoader is implemented using a custom module
type that defines a __getattribute__ which triggers module loading.
Furthermore, there are additional differences as well. For example,
it appears that Python 3 will return an existing sys.modules
entry instead of constructing a new module object.
This commit adds additional test coverage for lazy importing
behavior to cover the differences between Python 2 and 3. This
reveals that the test and some lazy import functionality is kinda
busted. For example, the test assumes "contextlib" will be lazy.
But in reality an import before it has already imported contextlib!
There's definitely room to improve the behavior of the demand
importer code, both for Python 2 and 3. But at least the test
passes on Python 3 now.
Differential Revision: https://phab.mercurial-scm.org/D5796
author | Gregory Szorc <gregory.szorc@gmail.com> |
---|---|
date | Fri, 01 Feb 2019 16:47:29 -0800 |
parents | 4e4fae1dda5c |
children | 15cccbacd5ce |
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#!/usr/bin/env python # # runrst - register custom roles and run correct writer # # Copyright 2010 Matt Mackall <mpm@selenic.com> and others # # This software may be used and distributed according to the terms of the # GNU General Public License version 2 or any later version. """usage: %s WRITER args... where WRITER is the name of a Docutils writer such as 'html' or 'manpage' """ from __future__ import absolute_import import sys try: import docutils.core as core import docutils.nodes as nodes import docutils.utils as utils import docutils.parsers.rst.roles as roles except ImportError: sys.stderr.write("abort: couldn't generate documentation: docutils " "module is missing\n") sys.stderr.write("please install python-docutils or see " "http://docutils.sourceforge.net/\n") sys.exit(-1) def role_hg(name, rawtext, text, lineno, inliner, options={}, content=[]): text = "hg " + utils.unescape(text) linktext = nodes.literal(rawtext, text) parts = text.split() cmd, args = parts[1], parts[2:] refuri = "hg.1.html#%s" % cmd if cmd == 'help' and args: if args[0] == 'config': # :hg:`help config` refuri = "hgrc.5.html" elif args[0].startswith('config.'): # :hg:`help config.SECTION...` refuri = "hgrc.5.html#%s" % args[0].split('.', 2)[1] elif len(args) >= 2 and args[0] == '-c': # :hg:`help -c COMMAND ...` is equivalent to :hg:`COMMAND` # (mainly for :hg:`help -c config`) refuri = "hg.1.html#%s" % args[1] else: refuri = "hg.1.html#%s" % args[0] node = nodes.reference(rawtext, '', linktext, refuri=refuri) return [node], [] roles.register_local_role("hg", role_hg) if __name__ == "__main__": if len(sys.argv) < 2: sys.stderr.write(__doc__ % sys.argv[0]) sys.exit(1) writer = sys.argv[1] del sys.argv[1] core.publish_cmdline(writer_name=writer)