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authorAndrew Tridgell <tridge@samba.org>2010-03-05 11:44:45 +1100
committerAndrew Tridgell <tridge@samba.org>2010-03-05 11:54:36 +1100
commit8c7cf499abf880cd4915e1b831298feb8990245b (patch)
treedc8bafcedb167209b74592d65ecb92857c5db946 /source4/scripting
parent2d30f4fb4fd39fb0949cd948559725917f95742f (diff)
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s4-python: allow us to have samba copies of python libraries we depend on
For python libraries like dns.resolver it is useful to be able to install a copy of the library with Samba. This set of functions allows us to do that while using the locally installed version if it is available Pair-Programmed-With: Andrew Bartlett <abartlet@samba.org>
Diffstat (limited to 'source4/scripting')
-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
@@ -0,0 +1,50 @@
+#!/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