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-rw-r--r--source4/scripting/python/samba/external.py50
1 files changed, 50 insertions, 0 deletions
diff --git a/source4/scripting/python/samba/external.py b/source4/scripting/python/samba/external.py
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+++ b/source4/scripting/python/samba/external.py
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+#!/usr/bin/python
+
+# Unix SMB/CIFS implementation.
+# Copyright (C) Andrew Tridgell 2010
+#
+# 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 3 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 General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program. If not, see <http://www.gnu.org/licenses/>.
+#
+
+import sys, os
+
+def samba_find_external(directory):
+ '''insert into out module search path the path to an
+ external library'''
+ for p in sys.path:
+ dir = os.path.join(p, directory)
+ if os.path.isdir(dir):
+ sys.path.insert(0, dir)
+ return
+
+ # finally try in the local directory, to handle in-tree testing
+ dir = os.path.join("scripting/python", directory)
+ if os.path.isdir(dir):
+ sys.path.insert(0, dir)
+ return
+
+ print "Failed to find external python library %s" % directory
+ raise
+
+
+def samba_external_dns_resolver():
+ '''try and import the dns.resolver library, and if it fails
+ then use a local copy from the external directory'''
+
+ try:
+ import dns.resolver as dns
+ except:
+ samba_find_external("samba_external/dnspython")
+ import dns.resolver as dns
+ return dns