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Re: Bug: IP address bogusly interpreted as peg revision

From: Troy Curtis Jr <troycurtisjr_at_gmail.com>
Date: Sun, 25 May 2008 13:56:10 -0500

>>> There are various work-arounds: the canonical way to "escape" an argument
>>> with no peg revision is to add an "@":
>>> $ svn log svn+ssh://svn@
>>> but in this particular example you might prefer to end the URL with "/":
>>> $ svn log svn+ssh://svn@
>> No, this leads to the same error.
> Oh, so it does! That's a bug: we're not supposed to be looking for a peg
> after the last "/". I suspect what is happening is the path is being
> "canonicalised" first, which whould strip off the final "/", but that's
> wrong and Troy Curtis is already working on a patch to fix the parsing of
> peg-revs with repository-relative URLs, and hopefully that will fix this
> too.

Long Answer:

Actually what is happening is this:
- Inside svn_client_args_to_target_array():
  - It is determined there is no peg revision (the peg splitting logic
bails on the trailing slash)
  - Then the string 'svn+ssh://svn@' is passed the
canonicalising function
  - The trailing slash is removed to make it canonical
  - The result is passed back in the targets array
- Inside subsequent command processing functions:
  - At some point the target is passed to svn_opt_parse_path() to
extract the peg revision (if any)
  - svn_opt_parse_path() does not see a peg revision (because we
removed the trailing slash) and so interprets as a peg, and an invalid one at that.

The "solution" here is the only proper way to "escape" the '@' inside
a path is by putting a trailing '@' in the target string.

Short Answer: It's not a bug, it's a feature! :)


>> I just asked to get the permission to file a bug. I didn't assumed the
>> behaviour could be accepted but it is indeed not a big deal so it is OK
>> for me.
> Thanks. If you'd like to help see if Troy's patch fixes the above usage,
> that would be great. (No worries if not.) His last revision of the patch is
> at <http://svn.haxx.se/dev/archive-2008-05/0477.shtml> and he hopes to send
> a revised version soon.
> - Julian

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Received on 2008-05-25 20:56:24 CEST

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