svn over http

sh$ cat /usr/src/apache/.config
command = "./configure --with-apr=/usr/local/apr --with-apr-util=/usr/local/apr --with-mpm=prefork --enable-so --enable-rewrite=static --enable-track-vars --enable-dav=shared --enable-dav-fs=shared --enable-dav-lock=shared";

sh$ cat /usr/src/subversion/.config
command = "./configure --with-apr=/usr/local/apr --with-apr-util=/usr/local/apr";
command = "make";
command = "sed -i 's@MKDIR = /usr/bin/install -c -d@MKDIR = mkdir -p@g' Makefile";
command = "make install";

sh$ cat httpd.conf
......
NameVirtualHost *:80

"<"VirtualHost *:80">"
        ServerName docs.shopex.cn
        DocumentRoot "/var/www/html/docs"
        "<"Directory "/var/www/html/docs"">"
            Options Indexes FollowSymLinks
            AllowOverride None

            Order allow,deny
            Allow from all
        "<"/Directory">"
        "<"Location /repos">"
                DAV svn
                SVNParentPath /var/www/html/docs/repos
        "<"/Location">"
"<"/VirtualHost">"

sh$ svnadmin create --fs-type fsfs http://docs.shopex.cn/
svnadmin: 'http://docs.shopex.cn' is an URL when it should be a path

svnadmin 直接访问版本库（因此只可以在存放版本库的机器上使用），它通过路径访问版本库，而不是 URL。

sh$ svnadmin create --fs-type fsfs /var/www/html/docs/repos/sysadm

sh$ svn list http://docs.shopex.cn/docs
svn: Unrecognized URL scheme for 'http://docs.shopex.cn/docs'

这是因为没有 ra_dav 这个库。

sh$ upm files subversion-1.4.3 | grep ra_dav

故障解决
但是编译没有成功将 ra_dav 编译进来，这是因为 neon 不存在或版本不够。可以从 ./configure 的输出中找到相应的说明。

sh$ rpm -qi neon

neon is an HTTP and WebDAV client library, with a C interface;
providing a high-level interface to HTTP and WebDAV methods along
with a low-level interface for HTTP request handling. neon
supports persistent connections, proxy servers, basic, digest and
Kerberos authentication, and has complete SSL support.

换用一个较低版本的 subversion，保证可以成功编译 ra_dav，然后运行：

sh$ svn list file:///var/www/html/docs/repos/sysadm/
sh$ svn list http://docs.shopex.cn/repos/sysadm
svn: PROPFIND request failed on '/repos/sysadm'
svn: PROPFIND of '/repos/sysadm': 301 Moved Permanently (http://docs.shopex.cn)

从页面上访问 docs.shopex.cn/repos：
Forbidden
You don't have permission to access /repos/ on this server. 然后访问 http://docs.shopex.cn/repos/index.html：

"<"D:error">"
"<"C:error/">"
"<"m:human-readable errcode="2"">"
Could not open the requested SVN filesystem
"<"/m:human-readable">"
"<"/D:error">"

这个问题参考这些页面：
Subversion 出現 301 Moved Permanently 的解決方法
subversion 301-error
SVN 基本的 Apache 配置
也就是说，不能将 DocumentRoot 和 SVN 的 repos Location 定义为同样的路径，因为如果一个请求的 URI 是/repos/foo.py，Apache不知道是直接到 repos/foo.py 访问这个文件还是让 mod_dav_svn 代理从 Subversion 版本库返回 foo.py。这里只需要注释上面的 DocumentRoot 即可！