Mercurial > hg
view tests/test-demandimport.py @ 44667:b561f3a68e41 stable
discovery: avoid wrongly saying there are nothing to pull
We can get in a situation where a revision passed through `hg pull --rev REV`
are available on the server, but not a descendant of the advertised server
heads.
For example the server could lying be during heads advertisement, to hide some
pull request. Or obsolete/hidden content could be explicitly pulled.
So in this case the lookup associated to `REV` returned successfully, but the
normal discovery will find all advertised heads already known locally. This flip
a special boolean `anyinc` that will prevent any fetch attempt, preventing `REV`
to be pulled over.
We add three line of code to detect this case and make sure a pull actually
happens.
My main target is to make some third party extensions happy (I expect the
associated test to move upstream with the extension). However this fix already
make some of the `infinitepush` test happier.
author | Pierre-Yves David <pierre-yves.david@octobus.net> |
---|---|
date | Mon, 06 Apr 2020 00:24:57 +0200 |
parents | f81c17ec303c |
children | fc8299319ffe |
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from __future__ import absolute_import, print_function from mercurial import demandimport demandimport.enable() import os import subprocess import sys import types # Don't import pycompat because it has too many side-effects. ispy3 = sys.version_info[0] >= 3 # Only run if demandimport is allowed if subprocess.call( ['python', '%s/hghave' % os.environ['TESTDIR'], 'demandimport'] ): sys.exit(80) # We rely on assert, which gets optimized out. if sys.flags.optimize: sys.exit(80) # The demand importer doesn't work on Python 3.5. if sys.version_info[0:2] == (3, 5): sys.exit(80) if ispy3: from importlib.util import _LazyModule try: from importlib.util import _Module as moduletype except ImportError: moduletype = types.ModuleType else: moduletype = types.ModuleType if os.name != 'nt': try: import distutils.msvc9compiler print( 'distutils.msvc9compiler needs to be an immediate ' 'importerror on non-windows platforms' ) distutils.msvc9compiler except ImportError: pass import re rsub = re.sub def f(obj): l = repr(obj) l = rsub("0x[0-9a-fA-F]+", "0x?", l) l = rsub("from '.*'", "from '?'", l) l = rsub("'<[a-z]*>'", "'<whatever>'", l) return l demandimport.disable() os.environ['HGDEMANDIMPORT'] = 'disable' # this enable call should not actually enable demandimport! demandimport.enable() from mercurial import node # We use assert instead of a unittest test case because having imports inside # functions changes behavior of the demand importer. if ispy3: assert not isinstance(node, _LazyModule) else: assert f(node) == "<module 'mercurial.node' from '?'>", f(node) # now enable it for real del os.environ['HGDEMANDIMPORT'] demandimport.enable() # Test access to special attributes through demandmod proxy assert 'mercurial.error' not in sys.modules from mercurial import error as errorproxy if ispy3: # unsure why this isn't lazy. assert not isinstance(f, _LazyModule) assert f(errorproxy) == "<module 'mercurial.error' from '?'>", f(errorproxy) else: assert f(errorproxy) == "<unloaded module 'error'>", f(errorproxy) doc = ' '.join(errorproxy.__doc__.split()[:3]) assert doc == 'Mercurial exceptions. This', doc assert errorproxy.__name__ == 'mercurial.error', errorproxy.__name__ # __name__ must be accessible via __dict__ so the relative imports can be # resolved name = errorproxy.__dict__['__name__'] assert name == 'mercurial.error', name if ispy3: assert not isinstance(errorproxy, _LazyModule) assert f(errorproxy) == "<module 'mercurial.error' from '?'>", f(errorproxy) else: assert f(errorproxy) == "<proxied module 'error'>", f(errorproxy) import os if ispy3: assert not isinstance(os, _LazyModule) assert f(os) == "<module 'os' from '?'>", f(os) else: assert f(os) == "<unloaded module 'os'>", f(os) assert f(os.system) == '<built-in function system>', f(os.system) assert f(os) == "<module 'os' from '?'>", f(os) assert 'mercurial.utils.procutil' not in sys.modules from mercurial.utils import procutil if ispy3: assert isinstance(procutil, _LazyModule) assert f(procutil) == "<module 'mercurial.utils.procutil' from '?'>", f( procutil ) else: assert f(procutil) == "<unloaded module 'procutil'>", f(procutil) assert f(procutil.system) == '<function system at 0x?>', f(procutil.system) assert procutil.__class__ == moduletype, procutil.__class__ assert f(procutil) == "<module 'mercurial.utils.procutil' from '?'>", f( procutil ) assert f(procutil.system) == '<function system at 0x?>', f(procutil.system) assert 'mercurial.hgweb' not in sys.modules from mercurial import hgweb if ispy3: assert isinstance(hgweb, _LazyModule) assert f(hgweb) == "<module 'mercurial.hgweb' from '?'>", f(hgweb) assert isinstance(hgweb.hgweb_mod, _LazyModule) assert ( f(hgweb.hgweb_mod) == "<module 'mercurial.hgweb.hgweb_mod' from '?'>" ), f(hgweb.hgweb_mod) else: assert f(hgweb) == "<unloaded module 'hgweb'>", f(hgweb) assert f(hgweb.hgweb_mod) == "<unloaded module 'hgweb_mod'>", f( hgweb.hgweb_mod ) assert f(hgweb) == "<module 'mercurial.hgweb' from '?'>", f(hgweb) import re as fred if ispy3: assert not isinstance(fred, _LazyModule) assert f(fred) == "<module 're' from '?'>" else: assert f(fred) == "<unloaded module 're'>", f(fred) import re as remod if ispy3: assert not isinstance(remod, _LazyModule) assert f(remod) == "<module 're' from '?'>" else: assert f(remod) == "<unloaded module 're'>", f(remod) import sys as re if ispy3: assert not isinstance(re, _LazyModule) assert f(re) == "<module 'sys' (built-in)>" else: assert f(re) == "<unloaded module 'sys'>", f(re) if ispy3: assert not isinstance(fred, _LazyModule) assert f(fred) == "<module 're' from '?'>", f(fred) else: assert f(fred) == "<unloaded module 're'>", f(fred) assert f(fred.sub) == '<function sub at 0x?>', f(fred.sub) if ispy3: assert not isinstance(fred, _LazyModule) assert f(fred) == "<module 're' from '?'>", f(fred) else: assert f(fred) == "<proxied module 're'>", f(fred) remod.escape # use remod assert f(remod) == "<module 're' from '?'>", f(remod) if ispy3: assert not isinstance(re, _LazyModule) assert f(re) == "<module 'sys' (built-in)>" assert f(type(re.stderr)) == "<class '_io.TextIOWrapper'>", f( type(re.stderr) ) assert f(re) == "<module 'sys' (built-in)>" else: assert f(re) == "<unloaded module 'sys'>", f(re) assert f(re.stderr) == "<open file '<whatever>', mode 'w' at 0x?>", f( re.stderr ) assert f(re) == "<proxied module 'sys'>", f(re) assert 'telnetlib' not in sys.modules import telnetlib if ispy3: assert isinstance(telnetlib, _LazyModule) assert f(telnetlib) == "<module 'telnetlib' from '?'>" else: assert f(telnetlib) == "<unloaded module 'telnetlib'>", f(telnetlib) try: from telnetlib import unknownattr assert False, ( 'no demandmod should be created for attribute of non-package ' 'module:\ntelnetlib.unknownattr = %s' % f(unknownattr) ) except ImportError as inst: assert rsub(r"'", '', str(inst)).startswith( 'cannot import name unknownattr' ) from mercurial import util # Unlike the import statement, __import__() function should not raise # ImportError even if fromlist has an unknown item # (see Python/import.c:import_module_level() and ensure_fromlist()) assert 'zipfile' not in sys.modules zipfileimp = __import__('zipfile', globals(), locals(), ['unknownattr']) assert f(zipfileimp) == "<module 'zipfile' from '?'>", f(zipfileimp) assert not util.safehasattr(zipfileimp, 'unknownattr')