Subversion Server Setup
This page describes how to install the Subversion server (which
involves installing Apache 2 with mod_dav + mod_dav_svn), how to
create a repository, and how to import some data. The server only
works under Unix right now, though patches for other OS's are welcome.
If you try it under Windows, try NT, not the 9x series -- Berkeley DB
3 (and Apache?) have known issues under 95 and 98.
Note: this is the same document that used to be called
dav_setup.txt notes; all this will eventually be fleshed out
and moved into the master documentation, of course.
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Subversion Server HOWTO
=======================
1. Checkout the "httpd-2.0" cvs module from apache.org. Put it
whereever you wish; it's an independent project.
cvs -d :pserver:anoncvs@cvs.apache.org:/home/cvspublic login
(password 'anoncvs')
cvs -d :pserver:anoncvs@cvs.apache.org:/home/cvspublic co httpd-2.0
2. cd httpd-2.0/srclib/, and checkout the "apr" and "apr-util"
modules into this directory:
cvs -d :pserver:anoncvs@cvs.apache.org:/home/cvspublic co apr
cvs -d :pserver:anoncvs@cvs.apache.org:/home/cvspublic co apr-util
3. At the top of the httpd-2.0 tree:
./buildconf
./configure --enable-dav --enable-so --prefix=/usr/local/apache2 \
--with-mpm=prefork
The first arg says to build mod_dav.
The second arg says to enable (and build everything) as shared libs.
The third arg is where you will ultimately install apache.
The fourth arg says to use the "prefork" style of operation.
NOTE: The fourth arg is needed for FreeBSD systems (broken
threads), but should be left out for other platforms (which
will cause Apache to default to a threaded model of
operation). Also note that "libmm.so" is needed for the
prefork option; if you're running FreeBSD, you may have to
build it out of /usr/ports.
Note: if you build Subversion with --enable-maintainer-mode, then
do the same for Apache. mod_dav_svn uses Apache's maintainer-mode
stuff from its headers, so you want to ensure that Apache is
built with the same assumption. Just add --enable-maintainer-mode
to the configure line above.
All instructions below assume you configured Apache to install
under /usr/local/apache2/; substitute appropriately if you chose
some other location.
4. make depend && make && make install
5. Go back into your subversion working copy and run ./autogen.sh if
you need to. Then run
./configure --with-apxs=/usr/local/apache2/bin/apxs
This argument tells subversion to build mod_dav_svn, and where to
find the required information to do so.
Note: do *not* configure subversion with "--disable-shared"!
mod_dav_svn *must* be built as a shared library, and it will look
for other libsvn_*.so libraries on your system.
Note: it *is* possible to build mod_dav_svn as a static library
and link it directly into Apache. Possible, but painful. Stick
with the shared library for now; if you can't, then ask.
6. rm /usr/local/lib/libsvn*
If you have old subversion libraries sitting on your system,
libtool will link them instead of the `fresh' ones in your tree.
Remove them before building subversion.
7. make clean && make && make install
After the make install, the Subversion shared libraries are in
/usr/local/lib/. libmod_dav_svn.so should be installed in
/usr/local/apache2/modules/.
8. Add this to the *bottom* of /usr/local/apache2/conf/httpd.conf:
<Location /svn/repos>
DAV svn
SVNPath /absolute/path/to/repository
</Location>
Make sure that the user 'nobody' (or whatever UID the httpd
process runs as) is able to read the berkeley db files.
9. Now fire up apache 2.0:
/usr/local/apache2/bin/apachectl stop
/usr/local/apache2/bin/apachectl start
Check /usr/local/apache2/logs/error_log to make sure it started
up okay.
10. Finally, try doing a network checkout from the repository:
svn co http://localhost/svn/repos -d wc
The most common reason this might fail is permission problems
reading the repository db files. If the checkout fails, chmod 777
and try again.
You can see all of mod_dav_svn's complaints in the Apache logfile.
Look in /usr/local/apache2/logs/error_log.
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ADDENDUM: Debugging Apache
'mod_dav_svn.so' contains the main Subversion server logic; it runs
as a module within mod_dav, which runs as a module within httpd.
If you need to debug the server, follow this recipe:
% gdb httpd
(gdb) run -X
^C
(gdb) break some_func_in_mod_dav_svn
(gdb) continue
The '-X' switch runs httpd in a single thread, and insures it won't
detach from the tty. As soon as it starts, it will sit and wait for
requests. Then hit control-C and set your breakpoint.
kfogel adds:
Hmmm, I had thought httpd 2.0 also had these options: -DONE_PROCESS
and -DNO_DETACH. How are they related to -X, and/or should they be
used in combination with -X? Anyone know?
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