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diff --git a/src/engine/SCons/Tool/MSCommon/netframework.py b/src/engine/SCons/Tool/MSCommon/netframework.py
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+#
+# Copyright (c) 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009 The SCons Foundation
+#
+# Permission is hereby granted, free of charge, to any person obtaining
+# a copy of this software and associated documentation files (the
+# "Software"), to deal in the Software without restriction, including
+# without limitation the rights to use, copy, modify, merge, publish,
+# distribute, sublicense, and/or sell copies of the Software, and to
+# permit persons to whom the Software is furnished to do so, subject to
+# the following conditions:
+#
+# The above copyright notice and this permission notice shall be included
+# in all copies or substantial portions of the Software.
+#
+# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY
+# KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE
+# WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+# NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+# LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+# OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+# WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+#
+
+__revision__ = "src/engine/SCons/Tool/MSCommon/netframework.py 4577 2009/12/27 19:44:43 scons"
+
+__doc__ = """
+"""
+
+import os
+import re
+import string
+
+from common import read_reg, debug
+
+# Original value recorded by dcournapeau
+_FRAMEWORKDIR_HKEY_ROOT = r'Software\Microsoft\.NETFramework\InstallRoot'
+# On SGK's system
+_FRAMEWORKDIR_HKEY_ROOT = r'Software\Microsoft\Microsoft SDKs\.NETFramework\v2.0\InstallationFolder'
+
+def find_framework_root():
+ # XXX: find it from environment (FrameworkDir)
+ try:
+ froot = read_reg(_FRAMEWORKDIR_HKEY_ROOT)
+ debug("Found framework install root in registry: %s" % froot)
+ except WindowsError, e:
+ debug("Could not read reg key %s" % _FRAMEWORKDIR_HKEY_ROOT)
+ return None
+
+ if not os.path.exists(froot):
+ debug("%s not found on fs" % froot)
+ return None
+
+ return froot
+
+def query_versions():
+ froot = find_framework_root()
+ if froot:
+ contents = os.listdir(froot)
+
+ l = re.compile('v[0-9]+.*')
+ versions = filter(lambda e, l=l: l.match(e), contents)
+
+ def versrt(a,b):
+ # since version numbers aren't really floats...
+ aa = a[1:]
+ bb = b[1:]
+ aal = string.split(aa, '.')
+ bbl = string.split(bb, '.')
+ # sequence comparison in python is lexicographical
+ # which is exactly what we want.
+ # Note we sort backwards so the highest version is first.
+ return cmp(bbl,aal)
+
+ versions.sort(versrt)
+ else:
+ versions = []
+
+ return versions
+
+# Local Variables:
+# tab-width:4
+# indent-tabs-mode:nil
+# End:
+# vim: set expandtab tabstop=4 shiftwidth=4: