""" Update a subversion checkout """

# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU Library General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
# Copyright 2004 Dries Verachtert

# This class can be used for updating a local checkout of a 
# subversion repository
# Using a callback (so you know which files are updated) does not work

import svn.wc, svn.client, svn.core
import atexit
from log4py import Logger

# Some notes:

# if your svn server uses ssl and the certificate isn't signed 
# by a trusted CA, then you have to add this certificate
# to the list of trusted certificates
# If you don't, it doesn't work :)
# Get the pem certificate:
#   openssl s_client -showcerts -connect svn.rpmforge.net:443
# copy the certificate to a file, the certificate consists of some 
# lines beginning with the line '-----BEGIN CERTIFICATE-----' and
# ending with the line '-----END CERTIFICATE-----'
# Configure subversion to use this pem file: edit ~/.subversion/servers
# and add a line like:
# ssl-authority-files = /some/path/svn.rpmforge.net.pem
# You need to add it to the section of your server. For example:

# [groups]
# rpmforge = *.rpmforge.net
#
# [rpmforge]
# ssl-authority-files = /home/dries/.subversion/svn.rpmforge.net.pem

# If you need to debug ssl/connection problems:
# add the following to the section of your server:
# neon-debug-mask = 511
# http-compression = no

class SvnWrapper:
    def __init__(self):
        self.cat = Logger().get_instance(self)
        self.cat.debug("start")
        self.transStarted = 0

    def startTransaction(self):
        self.cat.debug("start")
        if self.transStarted == 0:
            svn.core.apr_initialize()
            self.pool = svn.core.svn_pool_create(None)
            self.transStarted = 1
            atexit.register(svn.core.apr_terminate)
        else:
            self.cat.warn("transaction already started")
        
    def stopTransaction(self):
        self.cat.debug("start")
        if self.transStarted == 1:
            svn.core.svn_pool_destroy(self.pool)
            svn.core.apr_terminate()
            self.transStarted = 0
        else:
            self.cat.warn("transaction not yet started")

    def updateLocalCopy(self, svndir):
        self.cat.debug("start")
        myContext = svn.client.svn_client_ctx_t()
        self.cat.debug("myContext=" + str(myContext))
        myContext.config = svn.core.svn_config_get_config(None, self.pool)
        #self.cat.debug("result of config: " + str(configResult))
        provider = svn.client.svn_client_get_simple_provider(self.pool)
        myContext.auth_baton = svn.core.svn_auth_open([provider], self.pool)
        myRevision = svn.core.svn_opt_revision_t()
        self.cat.debug("myRevision=" + str(myRevision))
        myRevision.kind = svn.core.svn_opt_revision_head
        result = svn.client.svn_client_update(svndir,myRevision, 1,myContext, self.pool)
        self.cat.debug("result of update=" + str(result))
        
        
    def update_callback(self):
        self.cat.debug("start")

    # changed!
    # now -1 is returned if it is not within svn

    def getLastCommitRev(self,dirpath,fullpath):
        #if dirpath[len(dirpath)-1] == "/":
        #    self.cat.debug("removing last '/'")
        #    dirpath = dirpath[0:len(dirpath)-2]
        #else:
        #    self.cat.debug("last char:" + dirpath[len(dirpath)-1])
        self.cat.debug("start,dirpath=" + dirpath + ",fullpath="+fullpath)
        try:
            adm_baton = svn.wc.svn_wc_adm_open(None,dirpath,False,True,self.pool)
            entry = svn.wc.svn_wc_entry(fullpath,adm_baton,0,self.pool)
            self.cat.debug("entry: " + str(entry))
            self.cat.debug("cmtRev: " + str(entry.cmt_rev))
            svn.wc.svn_wc_adm_close(adm_baton)
            return entry.cmt_rev
        except:
            self.cat.debug("problem, probably not in svn")
            return -1

# tocheck: http://svn.slog.dk/repos/+svn/py/util.py
# http://www.contactor.se/~dast/svn/archive-2002-12/0234.shtml
# http://www.24svn.org/doc/srcdoc/svncpp/html/functions.html
# http://www.endrun.org/xr/svn/source/tools/examples/check-modified.py
# http://dan.drydog.com/docs/redhat/subversion-0.17.1/tools/examples/geturl.py
# http://dan.drydog.com/docs/redhat/subversion-0.17.1/tools/examples/check-modified.py
# http://www.linuxdevcenter.com/pub/a/linux/2003/04/24/libsvn1.html?page=2