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Re: Python bindings API confusion

From: Yasuhito FUTATSUKI <futatuki_at_yf.bsdclub.org>
Date: Thu, 30 Jul 2020 17:58:25 +0900

On 2020/07/30 17:47, Yasuhito FUTATSUKI wrote:
> On 2020/07/29 23:43, C. Michael Pilato wrote:
>> Makes sense to me as a way to get access to all the things that can be
>> returned in an errorful situation.
> Okey, I implemented it. The attached patch add "conflict_p" and "new_rev"
> attributes to SubversionException instance on svn_fs.commit_txn and
> svn_repos.fs_commit_txn. Also, svn_repos.fs_commit_txn now returns
> tuple of (None, int), for a consistency.
> I've tested this method on other API with dummy attribute, but I didn't
> test on those svn_fs.commit_txn and svn_repos.fs_commit_txn.
> Could you please review and try it ?
> Thanks, --
> Yasuhito FUTATSUKI <futatuki_at_yf.bsclub.org>

Ah, I sent the patch before including a commit message. Here it is.
swig-py: Allow SubversionException to add attributes

[in subversion/bindings/swig/]

* include/svn_types.swg
  (svn_error_t_with_attrs): New C macro. An alias of svn_error_t to
  distinct those C APIs which return value by using pointer args when
  error is occured.
  (typemap(out) svn_error_t_with_attrs *): New typemap.

* python/libsvn_swig_py/swigutil_py.h, python/libsvn_swig_py/swigutil_py.c
  (svn_swig_py_build_svn_exception): New function.
  (svn_swig_py_svn_exception): Use svn_swig_py_build_svn_exception to
  get the exception class and to make the instance of it from subversion

* svn_fs.i
  (typemap(argout) (const char **conflict_p, svn_revnum_t *new_rev)):
  - Add attribute "conflict_p" and "new_rev" to SubversionException
    instance when the exception is occured.
  - Fix the conversion format to build return value on Python 3
    "z" conversion makes str when conflict_p is not NULL, although
    it is always NULL in this context. So this is foolproof.
    New fake function declaration for SWIG to make a wrapper. Ignore
    the real one.

* svn_repos.i
  (typemap(argout) (const char **conflict_p, svn_repos_t *repos,
   svn_revnum_t *new_rev)):
    New typemap. Brought from typemap for svn_fs_commit_txn in svn_fs.i,
    and modified argment number.
    New fake function declaration for SWIG to make a wrapper. Ignore
    the real one.

Found by: cmpilato


Yasuhito FUTATSUKI <futatuki_at_yf.bsclub.org>
Received on 2020-07-30 11:00:54 CEST

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