> Am 05.11.2018 um 20:43 schrieb Stefan Sperling <s...@elego.de>:
> 
> On Mon, Nov 05, 2018 at 08:21:20PM -0200, Dr. Rolf Jansen wrote:
>> and of course the GitHub server does support HTTP/DAV.
> 
>> # svn co https://github.com/cyclaero/ContentCGI.git/trunk ContentCGI
>> svn: E170013: Unable to connect to a repository at URL 
>> 'https://github.com/cyclaero/ContentCGI.git/trunk'
>> svn: E175003: The server at 
>> 'https://github.com/cyclaero/ContentCGI.git/trunk' does not support the 
>> HTTP/DAV protocol
> 
> There is a problem at Github's end with SVN 1.11.
> 
> See the thread titled "Problems accessing GitHub's SVN-bridge with SVN 1.11"
> on this very mailing list: 
> https://svn.haxx.se/users/archive-2018-11/0008.shtml

In the meantime, I saw this thread.

> There is a problem at Github’s end with SVN 1.11.


Reading the whole thread, my impression is that there is another issue with the 
Robustness Principle of software design on Subversion’s end. See: 
https://en.wikipedia.org/wiki/Robustness_principle.

I won’t hold on my breath, until the Subversion Developers and the GitHub 
engineers sorted out their animosities. I put the patch shown below to 
/usr/ports/devel/subversion/files/patch-zz-DAV-robustness.local on my FreeBSD 
system, and then I reinstalled the port - problem solved. Happy discussions!

Best regards

Rolf

--- subversion/libsvn_ra_serf/options.c.orig    2018-02-25 10:22:55.000000000 
-0300
+++ subversion/libsvn_ra_serf/options.c 2018-11-05 20:50:29.431635000 -0200
@@ -403,7 +403,7 @@ options_response_handler(serf_request_t 
 
       /* Bail out early if we're not talking to a DAV server.
          Note that this check is only valid if we've received a success
-         response; redirects and errors don't count. */
+         response; redirects and errors don't count.
       if (opt_ctx->handler->sline.code >= 200
           && opt_ctx->handler->sline.code < 300
           && !opt_ctx->received_dav_header)
@@ -413,7 +413,7 @@ options_response_handler(serf_request_t 
              _("The server at '%s' does not support the HTTP/DAV protocol"),
              session->session_url_str);
         }
-
+      */
       /* Assume mergeinfo capability unsupported, if didn't receive information
          about server or repository mergeinfo capability. */
       if (!svn_hash_gets(session->capabilities, SVN_RA_CAPABILITY_MERGEINFO))

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