Python: Copy Python extractor to codeql repo

python/extractor/index.py

@@ -0,0 +1,28 @@
+#!/usr/bin/env python
+
+# This file needs to be able to handle all versions of Python we are likely to encounter
+# Which is probably 3.6 and upwards. Handling 3.6 specifically will be by throwing an error, though.
+# We will require at least 3.7 to proceed.
+
+'''Run index.py in buildtools'''
+
+import os
+import sys
+
+if sys.version_info < (3, 7):
+    sys.exit("ERROR: Python 3.7 or later is required (currently running {}.{})".format(sys.version_info[0], sys.version_info[1]))
+
+from python_tracer import getzipfilename
+
+if 'SEMMLE_DIST' in os.environ:
+    if 'CODEQL_EXTRACTOR_PYTHON_ROOT' not in os.environ:
+        os.environ['CODEQL_EXTRACTOR_PYTHON_ROOT'] = os.environ['SEMMLE_DIST']
+else:
+    os.environ["SEMMLE_DIST"] = os.environ["CODEQL_EXTRACTOR_PYTHON_ROOT"]
+
+tools = os.path.join(os.environ['SEMMLE_DIST'], "tools")
+zippath = os.path.join(tools, getzipfilename())
+sys.path = [ zippath ] + sys.path
+
+import buildtools.index
+buildtools.index.main()