> diff --git a/hooks/updatemetahook.py b/hooks/updatemetahook.py
> new file mode 100644
> --- /dev/null
> +++ b/hooks/updatemetahook.py
> @@ -0,0 +1,38 @@
> +# Mercurial hook to update/rebuild svn metadata if there are svn changes in
> +# the incoming changegroup.
> +#
> +# To install, add the following to your hgrc:
> +# [hooks]
> +# changegroup = python:/path/to/updatemetahook.py:hook
> +

> On Jun 8, 2012, at 4:28 PM, Brad Hall wrote:

> > # HG changeset patch
> > # User Brad Hall <bh...@fb.com>
> > # Date 1339111745 25200
> > # Node ID 998fdd15b5cc2d4b2b2d819143719ac40390ad98
> > # Parent  1750f667b870961047424b99a3701aa8e03f0825
> > Add a changegroup hook to update svn metadata

> Is there a way we could package it within hgsubversion so that it'd be easier for people that have hgsubversion installed at an unknown path?

> Also, I'd love to see a test for this code, even if it's trivial.

>> On Jun 8, 2012, at 4:28 PM, Brad Hall wrote:
> # HG changeset patch
> # User Brad Hall <bh...@fb.com>
> # Date 1339111745 25200
> # Node ID 0a4b16303fbae70dc4c06b9dca5ea6382716356c
> # Parent  1750f667b870961047424b99a3701aa8e03f0825
> Add a changegroup hook to update svn metadata

> diff --git a/hgsubversion/hooks/__init__.py b/hgsubversion/hooks/__init__.py
> new file mode 100644
> diff --git a/hgsubversion/hooks/updatemeta.py b/hgsubversion/hooks/updatemeta.py
> new file mode 100644
> --- /dev/null
> +++ b/hgsubversion/hooks/updatemeta.py
> @@ -0,0 +1,38 @@
> +# Mercurial hook to update/rebuild svn metadata if there are svn changes in
> +# the incoming changegroup.
> +#
> +# To install, add the following to your hgrc:
> +# [hooks]
> +# changegroup = python:hgsubversion.hooks.updatemeta.hook
> +
> +from mercurial import node
> +
> +shouldrun = False
> +try:
> +    import hgsubversion

> On Jul 19, 2012, at 11:19 AM, Brad Hall wrote:

> > On Wed, Jun 13, 2012 at 10:36:24AM -0400, Augie Fackler wrote:

> >> On Jun 8, 2012, at 4:28 PM, Brad Hall wrote:
> > # HG changeset patch
> > # User Brad Hall <bh...@fb.com>
> > # Date 1339111745 25200
> > # Node ID 0a4b16303fbae70dc4c06b9dca5ea6382716356c
> > # Parent  1750f667b870961047424b99a3701aa8e03f0825
> > Add a changegroup hook to update svn metadata

> > diff --git a/hgsubversion/hooks/__init__.py b/hgsubversion/hooks/__init__.py
> > new file mode 100644
> > diff --git a/hgsubversion/hooks/updatemeta.py b/hgsubversion/hooks/updatemeta.py
> > new file mode 100644
> > --- /dev/null
> > +++ b/hgsubversion/hooks/updatemeta.py
> > @@ -0,0 +1,38 @@
> > +# Mercurial hook to update/rebuild svn metadata if there are svn changes in
> > +# the incoming changegroup.
> > +#
> > +# To install, add the following to your hgrc:
> > +# [hooks]
> > +# changegroup = python:hgsubversion.hooks.updatemeta.hook
> > +
> > +from mercurial import node
> > +
> > +shouldrun = False
> > +try:
> > +    import hgsubversion

> Seems pretty silly that they'd have the hook installed but not hgsubversion now. Drop this bit?

> > +    import hgsubversion.util
> > +    import hgsubversion.svncommands
> > +    shouldrun = True
> > +except:
> > +    pass
> > +
> > +def hook(ui, repo, **kwargs):
> > +    if not shouldrun: # no hgsubversion; don't continue
> > +        return False
> > +
> > +    updatemeta = False
> > +    startrev = repo[node.bin(kwargs["node"])].rev()
> > +    # Check each rev until we find one that contains svn metadata
> > +    for rev in xrange(startrev, len(repo)):
> > +        svnrev = hgsubversion.util.getsvnrev(repo[rev])
> > +        if svnrev and svnrev.startswith("svn:"):
> > +            updatemeta = True
> > +            break
> > +
> > +    if updatemeta:
> > +        try:

> I wonder if we should print something, since this will have side effects on repositories with history from convert or hgsubversion even if the user doesn't expect that? I could go either way.

>> On Jul 19, 2012, at 11:19 AM, Brad Hall wrote:

>>> On Wed, Jun 13, 2012 at 10:36:24AM -0400, Augie Fackler wrote:

>>>> On Jun 8, 2012, at 4:28 PM, Brad Hall wrote:
>>> # HG changeset patch
>>> # User Brad Hall <bh...@fb.com>
>>> # Date 1339111745 25200
>>> # Node ID 0a4b16303fbae70dc4c06b9dca5ea6382716356c
>>> # Parent  1750f667b870961047424b99a3701aa8e03f0825
>>> Add a changegroup hook to update svn metadata

>>> diff --git a/hgsubversion/hooks/__init__.py b/hgsubversion/hooks/__init__.py
>>> new file mode 100644
>>> diff --git a/hgsubversion/hooks/updatemeta.py b/hgsubversion/hooks/updatemeta.py
>>> new file mode 100644
>>> --- /dev/null
>>> +++ b/hgsubversion/hooks/updatemeta.py
>>> @@ -0,0 +1,38 @@
>>> +# Mercurial hook to update/rebuild svn metadata if there are svn changes in
>>> +# the incoming changegroup.
>>> +#
>>> +# To install, add the following to your hgrc:
>>> +# [hooks]
>>> +# changegroup = python:hgsubversion.hooks.updatemeta.hook
>>> +
>>> +from mercurial import node
>>> +
>>> +shouldrun = False
>>> +try:
>>> +    import hgsubversion

>> Seems pretty silly that they'd have the hook installed but not hgsubversion now. Drop this bit?

> Gone

>>> +    import hgsubversion.util
>>> +    import hgsubversion.svncommands
>>> +    shouldrun = True
>>> +except:
>>> +    pass
>>> +
>>> +def hook(ui, repo, **kwargs):
>>> +    if not shouldrun: # no hgsubversion; don't continue
>>> +        return False
>>> +
>>> +    updatemeta = False
>>> +    startrev = repo[node.bin(kwargs["node"])].rev()
>>> +    # Check each rev until we find one that contains svn metadata
>>> +    for rev in xrange(startrev, len(repo)):
>>> +        svnrev = hgsubversion.util.getsvnrev(repo[rev])
>>> +        if svnrev and svnrev.startswith("svn:"):
>>> +            updatemeta = True
>>> +            break
>>> +
>>> +    if updatemeta:
>>> +        try:

>> I wonder if we should print something, since this will have side effects on repositories with history from convert or hgsubversion even if the user doesn't expect that? I could go either way.

> Yeah, makes sense.  I added a line to print that the metadata was updated.

> Updated patch below..

> Thanks,
> Brad

> # HG changeset patch
> # User Brad Hall <bh...@fb.com>
> # Date 1339111745 25200
> # Node ID 06d3668a1b6cab1e1b11cafed89f2c061bd0710b
> # Parent  1750f667b870961047424b99a3701aa8e03f0825
> Add a changegroup hook to update svn metadata

> diff --git a/hgsubversion/hooks/__init__.py b/hgsubversion/hooks/__init__.py
> new file mode 100644
> diff --git a/hgsubversion/hooks/updatemeta.py b/hgsubversion/hooks/updatemeta.py
> new file mode 100644
> --- /dev/null
> +++ b/hgsubversion/hooks/updatemeta.py
> @@ -0,0 +1,31 @@
> +# Mercurial hook to update/rebuild svn metadata if there are svn changes in
> +# the incoming changegroup.
> +#
> +# To install, add the following to your hgrc:
> +# [hooks]
> +# changegroup = python:hgsubversion.hooks.updatemeta.hook
> +
> +from mercurial import node
> +
> +import hgsubversion
> +import hgsubversion.util
> +import hgsubversion.svncommands
> +
> +def hook(ui, repo, **kwargs):
> +    updatemeta = False
> +    startrev = repo[node.bin(kwargs["node"])].rev()
> +    # Check each rev until we find one that contains svn metadata
> +    for rev in xrange(startrev, len(repo)):
> +        svnrev = hgsubversion.util.getsvnrev(repo[rev])
> +        if svnrev and svnrev.startswith("svn:"):
> +            updatemeta = True
> +            break
> +
> +    if updatemeta:
> +        try:
> +            hgsubversion.svncommands.updatemeta(ui, repo, args=[])
> +            ui.status("Updated svn metadata\n")
> +        except Exception, e:
> +            ui.warn("Failed to update svn metadata: %s" % str(e))
> +
> +    return False
> diff --git a/setup.py b/setup.py
> --- a/setup.py
> +++ b/setup.py
> @@ -118,7 +118,7 @@
>     long_description=open(os.path.join(os.path.dirname(__file__),
>                                          'README')).read(),
>     keywords='mercurial',
> -    packages=('hgsubversion', 'hgsubversion.svnwrap'),
> +    packages=('hgsubversion', 'hgsubversion.hooks', 'hgsubversion.svnwrap'),
>     package_data={ 'hgsubversion': ['help/subversion.rst'] },
>     platforms='any',
>     install_requires=requires,
> diff --git a/tests/run.py b/tests/run.py
> --- a/tests/run.py
> +++ b/tests/run.py
> @@ -18,6 +18,7 @@
>     import test_fetch_renames
>     import test_fetch_symlinks
>     import test_fetch_truncated
> +    import test_hooks
>     import test_pull
>     import test_push_command
>     import test_push_renames
> diff --git a/tests/test_hooks.py b/tests/test_hooks.py
> new file mode 100644
> --- /dev/null
> +++ b/tests/test_hooks.py
> @@ -0,0 +1,48 @@
> +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(stupid=False, 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)
> +
> +def suite():
> +    return unittest.findTestCases(sys.modules[__name__])