Replace deprecated pkg_resources usage

Change-Id: Ibc1aee3183951c9d88650cbf60c35078c2a86ada

tools/invocation_header_gen.py

diff --git a/tools/invocation_header_gen.py b/tools/invocation_header_gen.py
index 5d3100d..9c1ec03 100755
--- a/tools/invocation_header_gen.py
+++ b/tools/invocation_header_gen.py
@@ -9,14 +9,11 @@
 # ============================
 
 from __future__ import print_function
+from importlib.metadata import version
 from jinja2 import Environment, BaseLoader
 import argparse
 import sys
 import xml.dom.minidom
-import pkg_resources
-# We require jinja2 to be at least version 2.10 as we use the 'namespace' feature from
-# that version
-pkg_resources.require("jinja2>=2.10")
 
 
 COMMON_HEADER = """
@@ -195,6 +192,12 @@
 
 
 if __name__ == "__main__":
+    # We require jinja2 to be at least version 2.10 as we used the 'namespace'
+    # feature from that version.
+    jinja2_version = version("jinja2")
+    if jinja2_version < "2.10":
+        sys.exit("Jinja2 should be >= 2.10")
+
     args = parse_args()
 
     invocations = parse_xml(args.xml)

tools/syscall_header_gen.py

diff --git a/tools/syscall_header_gen.py b/tools/syscall_header_gen.py
index 3e7c230..ced8ac5 100755
--- a/tools/syscall_header_gen.py
+++ b/tools/syscall_header_gen.py
@@ -9,15 +9,12 @@
 # ==============================
 
 from __future__ import print_function
+from importlib.metadata import version
 from jinja2 import Environment, BaseLoader
 import argparse
 import re
 import sys
 import xml.dom.minidom
-import pkg_resources
-# We require jinja2 to be at least version 2.10 as we use the 'namespace' feature from
-# that version
-pkg_resources.require("jinja2>=2.10")
 
 
 COMMON_HEADER = """
@@ -223,6 +220,12 @@
 
 
 if __name__ == "__main__":
+    # We require jinja2 to be at least version 2.10 as we used the 'namespace'
+    # feature from that version.
+    jinja2_version = version("jinja2")
+    if jinja2_version < "2.10":
+        sys.exit("Jinja2 should be >= 2.10")
+
     args = parse_args()
 
     (api, debug) = parse_xml(args.xml, args.mcs)