Mercurial > hgsubversion
view README @ 1229:46523cdfd3b0 stable 1.6.3
pushmod: prepend "link " to base text for links
http://svn.apache.org/viewvc?view=revision&revision=1223036 exposes
what is arguably a bug in hgsubversion push code. Specifically, when
we are receiving text from the server in an editor, we prepend a "link
" to the text of symlinks when opening a file and strip it when
closing a file. We don't, however, prepend "link " to the base we use
when sending text changes to the server.
This was working before because prior to that revision, the first
thing subversion did was to check whether the entirety of the before
text or the entirety of the after text was less than 64 bytes. In
that case, it just sent the entirety of the after text as a single
insert operation. I'd expect most, but not all symlinks to fit under
the 64 byte limit, including the leading "link " text on the
subversion end.
After the change, the first thing subversion does is check for a
leading match that is more than 4 bytes long, or that is the full
length of the after text. In this case, it sends a copy operation for
the leading match, and then goes into the if < 64 bytes remaining send
the whole thing behavior. It also looks for trailing matches of more
than 4 bytes even in the <64 byte case, but that's not what breaks the
tests.
Incidentally, changing the destination of long symlinks was broken
even before this subversion change. This diff includes test additions
that cover that breakage.
| author | David Schleimer <dschleimer@gmail.com> |
|---|---|
| date | Thu, 07 Aug 2014 19:30:26 -0700 |
| parents | 3df6ed4e7561 |
| children | b06be5815692 |
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.. -*-restructuredtext-*- ============ hgsubversion ============ hgsubversion is an extension for Mercurial that allows using Mercurial as a Subversion client. At this point, hgsubversion is usable by users reasonably familiar with Mercurial as a VCS. It's not recommended to dive into hgsubversion as an introduction to Mercurial, since hgsubversion "bends the rules" a little and violates some of the typical assumptions of early Mercurial users. Installation ------------ You need to have either have Subversion 1.5 (or later) installed along with either Subvertpy 0.7.4 (or later) or the Subversion SWIG Python bindings. You need Mercurial 2.0 or later. .. _mercurial: http://selenic.com/repo/hg .. _mercurial-stable: http://selenic.com/repo/hg-stable .. _crew: http://hg.intevation.org/mercurial/crew .. _crew-stable: http://hg.intevation.org/mercurial/crew-stable If you are unfamiliar with installing Mercurial extensions, please see the UsingExtensions_ page in the Mercurial wiki. Look at the example for specifying an absolute path near the bottom of the page. You want to give the path to the top level of your clone of this repository. .. _UsingExtensions: http://mercurial.selenic.com/wiki/UsingExtensions Before using hgsubversion, I *strongly* encourage you to run the automated tests. Just use nose_ if you have it (or ``easy_install nose`` if you want it), or use ``python tests/run.py`` to run the suite with the conventional test runner. Note that because I use nose, there's a lot of stdout spew in the tests right now. The important part is that all the tests pass. .. _nose: http://code.google.com/p/python-nose/ You can check that hgsubversion is installed and properly activated using the following command:: $ hg version --svn Mercurial Distributed SCM (version ...) Copyright (C) 2005-2010 Matt Mackall <mpm@selenic.com> and others This is free software; see the source for copying conditions. There is NO warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. hgsubversion: ... Subversion: ... bindings: Subvertpy ... If your bindings are listed as `SWIG`, please consider installing Subvertpy_. .. _Subvertpy: http://pypi.python.org/pypi/subvertpy Further Reading --------------- More information on how to use hgsubversion is available from within Mercurial in the `subversion` help topic. To view it, use:: $ hg help subversion The Restructured Text source for this topic is also available in the file ``hgsubverson/help/subversion.rst``.