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From Ryan Schmidt <>
Subject Re: How do I enforce a minimum client version when hosted via httpd
Date Thu, 07 Oct 2010 09:25:44 GMT
On Oct 7, 2010, at 03:29, Stephen Connolly wrote:

> I remember reading before about a hack/trick that allows you to ensure that the client
is at least mergeinfo aware when the repository is served via Apache httpd.
> Google is not being co-operative with my attempts to find the Apache HTTPD directive
that makes this magic happen.
> IIRC the trick is less than perfect, i.e. it just blocks < 1.5.2 clients from connecting
(though the version limit could be 1.5.0 or 1.5.1 I recall it being about querying the capabilities
of the client and a specific capability was only introduced in 1.5.1 or 1.5.2) A better trick
would allow blocking clients less than 1.6.13 from connecting ;-)

There is no Apache directive for this; instead, you can write a clause in your start-commit
hook script. From the start-commit.tmpl file created for you in every new repository:

#   [1] REPOS-PATH   (the path to this repository)
#   [2] USER         (the authenticated user attempting to commit)
#   [3] CAPABILITIES (a colon-separated list of capabilities reported
#                     by the client; see note below)
# Note: The CAPABILITIES parameter is new in Subversion 1.5, and 1.5
# clients will typically report at least the "mergeinfo" capability.
# If there are other capabilities, then the list is colon-separated,
# e.g.: "mergeinfo:some-other-capability" (the order is undefined).

So if the third parameter passed to your start-commit hook script is empty / nonexistent,
you know that client is older than 1.5 and you can take some action, such as denying the commit,
if that's what you want to do.

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