push: rework the computation of fallbackheads to be correct
The previous computation tried to be smart but ended up being wrong. This was
caught by phase movement test while reworking the phase discovery logic to be
faster.
The previous logic was failing to catch case where the pushed set was not based
on a common heads (i.e. when the discovery seemed to have "over discovered"
content, outside the pushed set)
In the following graph, `e` is a common head and we `hg push -r f`. We need to
detect `c` as a fallback heads and we previous failed to do so::
e
|
d f
|/
c
|
b
|
a
The performance impact of the change seems minimal. On the most impacted
repository at hand (mozilla-try), the slowdown seems mostly mixed in the
overall noise `hg push` but seems to be in the hundred of milliseconds order of
magnitude. When using rust, we seems to be a bit faster, probably because we
leverage more accelaratd internals.
I added a couple of performance related common for further investigation later
on.
import unittest
from mercurial.hgweb import request as requestmod
from mercurial import error, pycompat
DEFAULT_ENV = {
'REQUEST_METHOD': 'GET',
'SERVER_NAME': 'testserver',
'SERVER_PORT': '80',
'SERVER_PROTOCOL': 'http',
'wsgi.version': (1, 0),
'wsgi.url_scheme': 'http',
'wsgi.input': None,
'wsgi.errors': None,
'wsgi.multithread': False,
'wsgi.multiprocess': True,
'wsgi.run_once': False,
}
def parse(env, reponame=None, altbaseurl=None, extra=None):
env = dict(env)
env.update(extra or {})
return requestmod.parserequestfromenv(
env, reponame=reponame, altbaseurl=altbaseurl
)
class ParseRequestTests(unittest.TestCase):
def testdefault(self):
r = parse(DEFAULT_ENV)
self.assertEqual(r.url, b'http://testserver')
self.assertEqual(r.baseurl, b'http://testserver')
self.assertEqual(r.advertisedurl, b'http://testserver')
self.assertEqual(r.advertisedbaseurl, b'http://testserver')
self.assertEqual(r.urlscheme, b'http')
self.assertEqual(r.method, b'GET')
self.assertIsNone(r.remoteuser)
self.assertIsNone(r.remotehost)
self.assertEqual(r.apppath, b'')
self.assertEqual(r.dispatchparts, [])
self.assertIsNone(r.dispatchpath)
self.assertIsNone(r.reponame)
self.assertEqual(r.querystring, b'')
self.assertEqual(len(r.qsparams), 0)
self.assertEqual(len(r.headers), 0)
def testcustomport(self):
r = parse(
DEFAULT_ENV,
extra={
'SERVER_PORT': '8000',
},
)
self.assertEqual(r.url, b'http://testserver:8000')
self.assertEqual(r.baseurl, b'http://testserver:8000')
self.assertEqual(r.advertisedurl, b'http://testserver:8000')
self.assertEqual(r.advertisedbaseurl, b'http://testserver:8000')
r = parse(
DEFAULT_ENV,
extra={
'SERVER_PORT': '4000',
'wsgi.url_scheme': 'https',
},
)
self.assertEqual(r.url, b'https://testserver:4000')
self.assertEqual(r.baseurl, b'https://testserver:4000')
self.assertEqual(r.advertisedurl, b'https://testserver:4000')
self.assertEqual(r.advertisedbaseurl, b'https://testserver:4000')
def testhttphost(self):
r = parse(
DEFAULT_ENV,
extra={
'HTTP_HOST': 'altserver',
},
)
self.assertEqual(r.url, b'http://altserver')
self.assertEqual(r.baseurl, b'http://altserver')
self.assertEqual(r.advertisedurl, b'http://testserver')
self.assertEqual(r.advertisedbaseurl, b'http://testserver')
def testscriptname(self):
r = parse(
DEFAULT_ENV,
extra={
'SCRIPT_NAME': '',
},
)
self.assertEqual(r.url, b'http://testserver')
self.assertEqual(r.baseurl, b'http://testserver')
self.assertEqual(r.advertisedurl, b'http://testserver')
self.assertEqual(r.advertisedbaseurl, b'http://testserver')
self.assertEqual(r.apppath, b'')
self.assertEqual(r.dispatchparts, [])
self.assertIsNone(r.dispatchpath)
r = parse(
DEFAULT_ENV,
extra={
'SCRIPT_NAME': '/script',
},
)
self.assertEqual(r.url, b'http://testserver/script')
self.assertEqual(r.baseurl, b'http://testserver')
self.assertEqual(r.advertisedurl, b'http://testserver/script')
self.assertEqual(r.advertisedbaseurl, b'http://testserver')
self.assertEqual(r.apppath, b'/script')
self.assertEqual(r.dispatchparts, [])
self.assertIsNone(r.dispatchpath)
r = parse(
DEFAULT_ENV,
extra={
'SCRIPT_NAME': '/multiple words',
},
)
self.assertEqual(r.url, b'http://testserver/multiple%20words')
self.assertEqual(r.baseurl, b'http://testserver')
self.assertEqual(r.advertisedurl, b'http://testserver/multiple%20words')
self.assertEqual(r.advertisedbaseurl, b'http://testserver')
self.assertEqual(r.apppath, b'/multiple words')
self.assertEqual(r.dispatchparts, [])
self.assertIsNone(r.dispatchpath)
def testpathinfo(self):
r = parse(
DEFAULT_ENV,
extra={
'PATH_INFO': '',
},
)
self.assertEqual(r.url, b'http://testserver')
self.assertEqual(r.baseurl, b'http://testserver')
self.assertEqual(r.advertisedurl, b'http://testserver')
self.assertEqual(r.advertisedbaseurl, b'http://testserver')
self.assertEqual(r.apppath, b'')
self.assertEqual(r.dispatchparts, [])
self.assertEqual(r.dispatchpath, b'')
r = parse(
DEFAULT_ENV,
extra={
'PATH_INFO': '/pathinfo',
},
)
self.assertEqual(r.url, b'http://testserver/pathinfo')
self.assertEqual(r.baseurl, b'http://testserver')
self.assertEqual(r.advertisedurl, b'http://testserver/pathinfo')
self.assertEqual(r.advertisedbaseurl, b'http://testserver')
self.assertEqual(r.apppath, b'')
self.assertEqual(r.dispatchparts, [b'pathinfo'])
self.assertEqual(r.dispatchpath, b'pathinfo')
r = parse(
DEFAULT_ENV,
extra={
'PATH_INFO': '/one/two/',
},
)
self.assertEqual(r.url, b'http://testserver/one/two/')
self.assertEqual(r.baseurl, b'http://testserver')
self.assertEqual(r.advertisedurl, b'http://testserver/one/two/')
self.assertEqual(r.advertisedbaseurl, b'http://testserver')
self.assertEqual(r.apppath, b'')
self.assertEqual(r.dispatchparts, [b'one', b'two'])
self.assertEqual(r.dispatchpath, b'one/two')
def testscriptandpathinfo(self):
r = parse(
DEFAULT_ENV,
extra={
'SCRIPT_NAME': '/script',
'PATH_INFO': '/pathinfo',
},
)
self.assertEqual(r.url, b'http://testserver/script/pathinfo')
self.assertEqual(r.baseurl, b'http://testserver')
self.assertEqual(r.advertisedurl, b'http://testserver/script/pathinfo')
self.assertEqual(r.advertisedbaseurl, b'http://testserver')
self.assertEqual(r.apppath, b'/script')
self.assertEqual(r.dispatchparts, [b'pathinfo'])
self.assertEqual(r.dispatchpath, b'pathinfo')
r = parse(
DEFAULT_ENV,
extra={
'SCRIPT_NAME': '/script1/script2',
'PATH_INFO': '/path1/path2',
},
)
self.assertEqual(
r.url, b'http://testserver/script1/script2/path1/path2'
)
self.assertEqual(r.baseurl, b'http://testserver')
self.assertEqual(
r.advertisedurl, b'http://testserver/script1/script2/path1/path2'
)
self.assertEqual(r.advertisedbaseurl, b'http://testserver')
self.assertEqual(r.apppath, b'/script1/script2')
self.assertEqual(r.dispatchparts, [b'path1', b'path2'])
self.assertEqual(r.dispatchpath, b'path1/path2')
r = parse(
DEFAULT_ENV,
extra={
'HTTP_HOST': 'hostserver',
'SCRIPT_NAME': '/script',
'PATH_INFO': '/pathinfo',
},
)
self.assertEqual(r.url, b'http://hostserver/script/pathinfo')
self.assertEqual(r.baseurl, b'http://hostserver')
self.assertEqual(r.advertisedurl, b'http://testserver/script/pathinfo')
self.assertEqual(r.advertisedbaseurl, b'http://testserver')
self.assertEqual(r.apppath, b'/script')
self.assertEqual(r.dispatchparts, [b'pathinfo'])
self.assertEqual(r.dispatchpath, b'pathinfo')
if not getattr(unittest.TestCase, 'assertRaisesRegex', False):
# Python 3.7 deprecates the regex*p* version, but 2.7 lacks
# the regex version.
assertRaisesRegex = ( # camelcase-required
unittest.TestCase.assertRaisesRegexp
)
def testreponame(self):
"""repository path components get stripped from URL."""
with self.assertRaisesRegex(
error.ProgrammingError, 'reponame requires PATH_INFO'
):
parse(DEFAULT_ENV, reponame=b'repo')
with self.assertRaisesRegex(
error.ProgrammingError, 'PATH_INFO does not begin with repo ' 'name'
):
parse(
DEFAULT_ENV,
reponame=b'repo',
extra={
'PATH_INFO': '/pathinfo',
},
)
with self.assertRaisesRegex(
error.ProgrammingError, 'reponame prefix of PATH_INFO'
):
parse(
DEFAULT_ENV,
reponame=b'repo',
extra={
'PATH_INFO': '/repoextra/path',
},
)
r = parse(
DEFAULT_ENV,
reponame=b'repo',
extra={
'PATH_INFO': '/repo/path1/path2',
},
)
self.assertEqual(r.url, b'http://testserver/repo/path1/path2')
self.assertEqual(r.baseurl, b'http://testserver')
self.assertEqual(r.advertisedurl, b'http://testserver/repo/path1/path2')
self.assertEqual(r.advertisedbaseurl, b'http://testserver')
self.assertEqual(r.apppath, b'/repo')
self.assertEqual(r.dispatchparts, [b'path1', b'path2'])
self.assertEqual(r.dispatchpath, b'path1/path2')
self.assertEqual(r.reponame, b'repo')
r = parse(
DEFAULT_ENV,
reponame=b'prefix/repo',
extra={
'PATH_INFO': '/prefix/repo/path1/path2',
},
)
self.assertEqual(r.url, b'http://testserver/prefix/repo/path1/path2')
self.assertEqual(r.baseurl, b'http://testserver')
self.assertEqual(
r.advertisedurl, b'http://testserver/prefix/repo/path1/path2'
)
self.assertEqual(r.advertisedbaseurl, b'http://testserver')
self.assertEqual(r.apppath, b'/prefix/repo')
self.assertEqual(r.dispatchparts, [b'path1', b'path2'])
self.assertEqual(r.dispatchpath, b'path1/path2')
self.assertEqual(r.reponame, b'prefix/repo')
def testaltbaseurl(self):
# Simple hostname remap.
r = parse(DEFAULT_ENV, altbaseurl=b'http://altserver')
self.assertEqual(r.url, b'http://testserver')
self.assertEqual(r.baseurl, b'http://testserver')
self.assertEqual(r.advertisedurl, b'http://altserver')
self.assertEqual(r.advertisedbaseurl, b'http://altserver')
self.assertEqual(r.urlscheme, b'http')
self.assertEqual(r.apppath, b'')
self.assertEqual(r.dispatchparts, [])
self.assertIsNone(r.dispatchpath)
self.assertIsNone(r.reponame)
# With a custom port.
r = parse(DEFAULT_ENV, altbaseurl=b'http://altserver:8000')
self.assertEqual(r.url, b'http://testserver')
self.assertEqual(r.baseurl, b'http://testserver')
self.assertEqual(r.advertisedurl, b'http://altserver:8000')
self.assertEqual(r.advertisedbaseurl, b'http://altserver:8000')
self.assertEqual(r.urlscheme, b'http')
self.assertEqual(r.apppath, b'')
self.assertEqual(r.dispatchparts, [])
self.assertIsNone(r.dispatchpath)
self.assertIsNone(r.reponame)
# With a changed protocol.
r = parse(DEFAULT_ENV, altbaseurl=b'https://altserver')
self.assertEqual(r.url, b'http://testserver')
self.assertEqual(r.baseurl, b'http://testserver')
self.assertEqual(r.advertisedurl, b'https://altserver')
self.assertEqual(r.advertisedbaseurl, b'https://altserver')
# URL scheme is defined as the actual scheme, not advertised.
self.assertEqual(r.urlscheme, b'http')
self.assertEqual(r.apppath, b'')
self.assertEqual(r.dispatchparts, [])
self.assertIsNone(r.dispatchpath)
self.assertIsNone(r.reponame)
# Need to specify explicit port number for proper https:// alt URLs.
r = parse(DEFAULT_ENV, altbaseurl=b'https://altserver:443')
self.assertEqual(r.url, b'http://testserver')
self.assertEqual(r.baseurl, b'http://testserver')
self.assertEqual(r.advertisedurl, b'https://altserver')
self.assertEqual(r.advertisedbaseurl, b'https://altserver')
self.assertEqual(r.urlscheme, b'http')
self.assertEqual(r.apppath, b'')
self.assertEqual(r.dispatchparts, [])
self.assertIsNone(r.dispatchpath)
self.assertIsNone(r.reponame)
# With only PATH_INFO defined.
r = parse(
DEFAULT_ENV,
altbaseurl=b'http://altserver',
extra={
'PATH_INFO': '/path1/path2',
},
)
self.assertEqual(r.url, b'http://testserver/path1/path2')
self.assertEqual(r.baseurl, b'http://testserver')
self.assertEqual(r.advertisedurl, b'http://altserver/path1/path2')
self.assertEqual(r.advertisedbaseurl, b'http://altserver')
self.assertEqual(r.urlscheme, b'http')
self.assertEqual(r.apppath, b'')
self.assertEqual(r.dispatchparts, [b'path1', b'path2'])
self.assertEqual(r.dispatchpath, b'path1/path2')
self.assertIsNone(r.reponame)
# Path on alt URL.
r = parse(DEFAULT_ENV, altbaseurl=b'http://altserver/altpath')
self.assertEqual(r.url, b'http://testserver')
self.assertEqual(r.baseurl, b'http://testserver')
self.assertEqual(r.advertisedurl, b'http://altserver/altpath')
self.assertEqual(r.advertisedbaseurl, b'http://altserver')
self.assertEqual(r.urlscheme, b'http')
self.assertEqual(r.apppath, b'/altpath')
self.assertEqual(r.dispatchparts, [])
self.assertIsNone(r.dispatchpath)
self.assertIsNone(r.reponame)
# With a trailing slash.
r = parse(DEFAULT_ENV, altbaseurl=b'http://altserver/altpath/')
self.assertEqual(r.url, b'http://testserver')
self.assertEqual(r.baseurl, b'http://testserver')
self.assertEqual(r.advertisedurl, b'http://altserver/altpath/')
self.assertEqual(r.advertisedbaseurl, b'http://altserver')
self.assertEqual(r.urlscheme, b'http')
self.assertEqual(r.apppath, b'/altpath/')
self.assertEqual(r.dispatchparts, [])
self.assertIsNone(r.dispatchpath)
self.assertIsNone(r.reponame)
# PATH_INFO + path on alt URL.
r = parse(
DEFAULT_ENV,
altbaseurl=b'http://altserver/altpath',
extra={
'PATH_INFO': '/path1/path2',
},
)
self.assertEqual(r.url, b'http://testserver/path1/path2')
self.assertEqual(r.baseurl, b'http://testserver')
self.assertEqual(
r.advertisedurl, b'http://altserver/altpath/path1/path2'
)
self.assertEqual(r.advertisedbaseurl, b'http://altserver')
self.assertEqual(r.urlscheme, b'http')
self.assertEqual(r.apppath, b'/altpath')
self.assertEqual(r.dispatchparts, [b'path1', b'path2'])
self.assertEqual(r.dispatchpath, b'path1/path2')
self.assertIsNone(r.reponame)
# PATH_INFO + path on alt URL with trailing slash.
r = parse(
DEFAULT_ENV,
altbaseurl=b'http://altserver/altpath/',
extra={
'PATH_INFO': '/path1/path2',
},
)
self.assertEqual(r.url, b'http://testserver/path1/path2')
self.assertEqual(r.baseurl, b'http://testserver')
self.assertEqual(
r.advertisedurl, b'http://altserver/altpath//path1/path2'
)
self.assertEqual(r.advertisedbaseurl, b'http://altserver')
self.assertEqual(r.urlscheme, b'http')
self.assertEqual(r.apppath, b'/altpath/')
self.assertEqual(r.dispatchparts, [b'path1', b'path2'])
self.assertEqual(r.dispatchpath, b'path1/path2')
self.assertIsNone(r.reponame)
# Local SCRIPT_NAME is ignored.
r = parse(
DEFAULT_ENV,
altbaseurl=b'http://altserver',
extra={
'SCRIPT_NAME': '/script',
'PATH_INFO': '/path1/path2',
},
)
self.assertEqual(r.url, b'http://testserver/script/path1/path2')
self.assertEqual(r.baseurl, b'http://testserver')
self.assertEqual(r.advertisedurl, b'http://altserver/path1/path2')
self.assertEqual(r.advertisedbaseurl, b'http://altserver')
self.assertEqual(r.urlscheme, b'http')
self.assertEqual(r.apppath, b'')
self.assertEqual(r.dispatchparts, [b'path1', b'path2'])
self.assertEqual(r.dispatchpath, b'path1/path2')
self.assertIsNone(r.reponame)
# Use remote's path for script name, app path
r = parse(
DEFAULT_ENV,
altbaseurl=b'http://altserver/altroot',
extra={
'SCRIPT_NAME': '/script',
'PATH_INFO': '/path1/path2',
},
)
self.assertEqual(r.url, b'http://testserver/script/path1/path2')
self.assertEqual(r.baseurl, b'http://testserver')
self.assertEqual(
r.advertisedurl, b'http://altserver/altroot/path1/path2'
)
self.assertEqual(r.advertisedbaseurl, b'http://altserver')
self.assertEqual(r.urlscheme, b'http')
self.assertEqual(r.apppath, b'/altroot')
self.assertEqual(r.dispatchparts, [b'path1', b'path2'])
self.assertEqual(r.dispatchpath, b'path1/path2')
self.assertIsNone(r.reponame)
# reponame is factored in properly.
r = parse(
DEFAULT_ENV,
reponame=b'repo',
altbaseurl=b'http://altserver/altroot',
extra={
'SCRIPT_NAME': '/script',
'PATH_INFO': '/repo/path1/path2',
},
)
self.assertEqual(r.url, b'http://testserver/script/repo/path1/path2')
self.assertEqual(r.baseurl, b'http://testserver')
self.assertEqual(
r.advertisedurl, b'http://altserver/altroot/repo/path1/path2'
)
self.assertEqual(r.advertisedbaseurl, b'http://altserver')
self.assertEqual(r.apppath, b'/altroot/repo')
self.assertEqual(r.dispatchparts, [b'path1', b'path2'])
self.assertEqual(r.dispatchpath, b'path1/path2')
self.assertEqual(r.reponame, b'repo')
def testenvencoding(self):
b = b''.join(pycompat.bytechr(i) for i in range(256))
r = parse(DEFAULT_ENV, extra={'foo': b.decode('iso8859-1')})
self.assertEqual(r.rawenv[b'foo'], b)
if __name__ == '__main__':
import silenttestrunner
silenttestrunner.main(__name__)