Adapt to latest doctools refactoring.
diff --git a/Doc/tools/sphinxext/patchlevel.py b/Doc/tools/sphinxext/patchlevel.py
new file mode 100644
index 0000000..971ea61
--- /dev/null
+++ b/Doc/tools/sphinxext/patchlevel.py
@@ -0,0 +1,68 @@
+# -*- coding: utf-8 -*-
+"""
+ patchlevel.py
+ ~~~~~~~~~~~~~
+
+ Extract version info from Include/patchlevel.h.
+ Adapted from Doc/tools/getversioninfo.
+
+ :copyright: 2007-2008 by Georg Brandl.
+ :license: Python license.
+"""
+
+import os
+import re
+import sys
+
+def get_header_version_info(srcdir):
+ patchlevel_h = os.path.join(srcdir, '..', 'Include', 'patchlevel.h')
+
+ # This won't pick out all #defines, but it will pick up the ones we
+ # care about.
+ rx = re.compile(r'\s*#define\s+([a-zA-Z][a-zA-Z_0-9]*)\s+([a-zA-Z_0-9]+)')
+
+ d = {}
+ f = open(patchlevel_h)
+ try:
+ for line in f:
+ m = rx.match(line)
+ if m is not None:
+ name, value = m.group(1, 2)
+ d[name] = value
+ finally:
+ f.close()
+
+ release = version = '%s.%s' % (d['PY_MAJOR_VERSION'], d['PY_MINOR_VERSION'])
+ micro = int(d['PY_MICRO_VERSION'])
+ if micro != 0:
+ release += '.' + str(micro)
+
+ level = d['PY_RELEASE_LEVEL']
+ suffixes = {
+ 'PY_RELEASE_LEVEL_ALPHA': 'a',
+ 'PY_RELEASE_LEVEL_BETA': 'b',
+ 'PY_RELEASE_LEVEL_GAMMA': 'c',
+ }
+ if level != 'PY_RELEASE_LEVEL_FINAL':
+ release += suffixes[level] + str(int(d['PY_RELEASE_SERIAL']))
+ return version, release
+
+
+def get_sys_version_info():
+ major, minor, micro, level, serial = sys.version_info
+ release = version = '%s.%s' % (major, minor)
+ if micro:
+ release += '.%s' % micro
+ if level != 'final':
+ release += '%s%s' % (level[0], serial)
+ return version, release
+
+
+def get_version_info():
+ try:
+ return get_header_version_info('.')
+ except (IOError, OSError):
+ version, release = get_sys_version_info()
+ print >>sys.stderr, 'Can\'t get version info from Include/patchlevel.h, ' \
+ 'using version of this interpreter (%s).' % release
+ return version, release