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layouts: fix crash when importing hgsubversion itself (issue #402) Mercurial extensions are a bit weird: they aren't normally in sys.path, so you can't assume that "import hgsubversion" works. Luckily, Mercurial sneaks a little treat into sys.modules so that "import hgext_hgsubversion" does work. In fact, to get things working *as a Mercurial extension*, all that's needed is that trivial change to two import lines, in layouts/detect.py and layouts/standard.py. Unfortunately, hgsubversion is also imported as a Python module, in its own test suite. In that context, there is no "hgext_" trick -- unless we do it in ourselves, which I've done in TestBase.setUp(). That would work fine ... except that test_util imports from hgsubversion, which ends up importing hgsubversion.layouts.{detect,standard}, which want the "hgext_" trick to work. But it hasn't been done yet when we're still importing; it doesn't happen until setUp() runs. So make those two imports happen late, in the functions that need them. Incidentally, this is only necessary to support Mercurial <= 2.7. Mercurial got a bit smarter in 2.8: http://selenic.com/repo/hg/rev/621a26eb3a99
author Greg Ward <greg@gerg.ca>
date Thu, 02 Jan 2014 21:53:39 -0500
parents 20850abfb91a
children 4f1461428334
line wrap: on
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import sys
import test_util
import unittest

from mercurial import hg
from mercurial import commands

class TestHooks(test_util.TestBase):
    def setUp(self):
        super(TestHooks, self).setUp()

    def _loadupdate(self, fixture_name, *args, **kwargs):
        kwargs = kwargs.copy()
        kwargs.update(noupdate=False)
        repo, repo_path = self.load_and_fetch(fixture_name, *args, **kwargs)
        return repo, repo_path

    def test_updatemetahook(self):
        repo, repo_path = self._loadupdate('single_rev.svndump')
        state = repo.parents()
        self.add_svn_rev(repo_path, {'trunk/alpha': 'Changed'})
        commands.pull(self.repo.ui, self.repo)

        # Clone to a new repository and add a hook
        new_wc_path = "%s-2" % self.wc_path
        commands.clone(self.repo.ui, self.wc_path, new_wc_path)
        newrepo = hg.repository(test_util.testui(), new_wc_path)
        newrepo.ui.setconfig('hooks', 'changegroup.meta',
                'python:hgsubversion.hooks.updatemeta.hook')

        # Commit a rev that should trigger svn meta update
        self.add_svn_rev(repo_path, {'trunk/alpha': 'Changed Again'})
        commands.pull(self.repo.ui, self.repo)

        self.called = False
        import hgsubversion.svncommands
        oldupdatemeta = hgsubversion.svncommands.updatemeta
        def _updatemeta(ui, repo, args=[]):
            self.called = True
        hgsubversion.svncommands.updatemeta = _updatemeta

        # Pull and make sure our updatemeta function gets called
        commands.pull(newrepo.ui, newrepo)
        hgsubversion.svncommands.updatemeta = oldupdatemeta
        self.assertTrue(self.called)