Hi Роман, On Thu, Mar 25, 2010 at 06:56:26PM +0300, Роман Донченко wrote:
>> Back to python: I managed to use the Python bindings to get a value from >> the config file (I didn't want to reinvent the wheel) like this: >> >> *** >> from svn import repos, fs, delta, core, client >> >> def main(pool, repos_dir): >> >> # for now, store client configuration in repository root >> cfgfile = repos_dir+'/conf/client.conf' >> >> svncfg = core.svn_config_read (cfgfile, True, pool) >> >> global_ignores = core.svn_config_get (svncfg, >> core.SVN_CONFIG_SECTION_GLOBAL, core.SVN_CONFIG_OPTION_GLOBAL_IGNORES, >> None) >> >> *** >> >> Now I'd like to verify our default set of required MIME types, so I need >> to get the contents of the [auto-props] section from the config file. >> >> libsvn provides the following function which should be suitable for my >> needs: >> >> svn_config_enumerate2(svn_config_t cfg, char section, >> svn_config_enumerator2_t callback, void baton, apr_pool_t pool) -> int >> >> Two questions arise: >> >> 1. How do I define an appropiate callback in Python? Looking at the SWIG >> documentation, I see examples on how to implement Python callbacks but >> they don't seem to match the current SVN bindings. I tried passing a >> Python method, deriving from svn_config_enumerator2_t etc. -> Segfault. > > I took a look, and unfortunately this callback is not supported. The > reason for that is that SWIG can't automatically figure out how to call > Python callbacks, so a chunk of boring code must be written for each > callback type - and I guess no developers needed to scratch this > particular itch. > > If it was supported, however, the call would look like this (and it > *will* look like this, after I become un-busy again and implement it): > > def enumerator(name, value, pool): > print "%s: %s" % (name, value) > > core.svn_config_enumerate2(svncfg, core.SVN_CONFIG_SECTION_AUTO_PROPS, > enumerator) Thanks a lot for the answer - I already suspected something like this... ;-| So, back to good old "do it yourself"... ;-) Not that it's complicated, I just wanted to stay within Subversion as far as possible. :-) >> 2. What's the baton good for? Is it just some kind of additional data, I >> don't need to care about? > > The baton argument is used up by the bindings themselves, you neither > should nor can supply your own (this applies to all callbacks). > > Additional question: I can't seem to find an equivalent of "svnlook > > cat" anywhere... I wanted to avoid calling external programs - commits > > are slow enough already... > > You basically need to apply repos.open, then repos.fs, then > fs.revision_root, then fs.file_contents. I'm seeing the following example code: fs_ptr = repos.svn_repos_fs(repos.svn_repos_open(repos_dir, pool)) root = fs.txn_root(fs.open_txn(fs_ptr, txn, pool), pool) cc = repos.ChangeCollector(fs_ptr, root, pool) -> shall I use fs.txn_root or fs.revision_root (the revision is not complete yet, it's just being committed) Thanks again, Tino. -- "What we nourish flourishes." - "Was wir nähren erblüht." www.lichtkreis-chemnitz.de www.tisc.de
