cvsserver: Add some useful commandline options

Make git-cvsserver understand some options inspired by
git-daemon, namely --base-path, --export-all, --strict-paths.

Also allow the caller to specify a whitelist of allowed
directories, again similar to git-daemon.

While already adding option parsing also support the common
--help and --version options.

Rationale:

While the gitcvs.enabled configuration option already
offers means to limit git-cvsserver access to a repository,
there are some use cases where other methods of access
control prove to be more useful.

E.g. if setting up a pserver for a collection of public
repositories one might want limit the exported repositories
to exactly the directory this collection is located whithout
having to worry about other repositories that might lie around
with the configuration variable set (never trust your users ;)

Signed-off-by: Frank Lichtenheld <frank@lichtenheld.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

1 files changed, 42 insertions, 0 deletions

diff --git a/Documentation/git-cvsserver.txt b/Documentation/git-cvsserver.txt
index e5005f02f..6d1e31174 100644
--- a/Documentation/git-cvsserver.txt
+++ b/Documentation/git-cvsserver.txt
@@ -7,10 +7,52 @@ git-cvsserver - A CVS server emulator for git
 
 SYNOPSIS
 --------
+
+SSH:
+
 [verse]
 export CVS_SERVER=git-cvsserver
 'cvs' -d :ext:user@server/path/repo.git co <HEAD_name>
 
+pserver (/etc/inetd.conf):
+
+[verse]
+cvspserver stream tcp nowait nobody /usr/bin/git-cvsserver git-cvsserver pserver
+
+Usage:
+
+[verse]
+'git-cvsserver' [options] [pserver|server] [<directory> ...]
+
+OPTIONS
+-------
+
+All these options obviously only make sense if enforced by the server side.
+They have been implemented to resemble the gitlink:git-daemon[1] options as
+closely as possible.
+
+--base-path <path>::
+Prepend 'path' to requested CVSROOT
+
+--strict-paths::
+Don't allow recursing into subdirectories
+
+--export-all::
+Don't check for `gitcvs.enabled` in config
+
+--version, -V::
+Print version information and exit
+
+--help, -h, -H::
+Print usage information and exit
+
+<directory>::
+You can specify a list of allowed directories. If no directories
+are given, all are allowed. This is an additional restriction, gitcvs
+access still needs to be enabled by the `gitcvs.enabled` config option
+unless '--export-all' was given, too.
+
+
 DESCRIPTION
 -----------