tools: change python invocations to use /usr/bin/env python3

Let's be consistent here

Signed-off-by: Peter Hutterer <peter.hutterer@who-t.net>

.gitlab-ci.yml

@@ -462,6 +462,20 @@ fedora:30@valgrind:
     MESON_TEST_ARGS: '--suite=valgrind --no-suite=hardware --setup=valgrind'
   before_script:
     - dnf install -y valgrind
+
+# Python checks, only run on Fedora
+
+fedora:30@usr-bin-env-python:
+  extends: .fedora-build@template
+  variables:
+    FEDORA_VERSION: 30
+  script:
+    - |
+      if git grep -l '^#!/usr/bin/python'; then
+        echo "Use '/usr/bin/env python3' in the above files";
+        /bin/false
+      fi
+
 #
 # Ubuntu
 #

tools/libinput-record-verify-yaml.py

@@ -1,4 +1,4 @@
-#!/usr/bin/python3
+#!/usr/bin/env python3
 # vim: set expandtab shiftwidth=4:
 # -*- Mode: python; coding: utf-8; indent-tabs-mode: nil -*- */
 #

tools/test-tool-option-parsing.py

@@ -1,4 +1,4 @@
-#!/usr/bin/python3
+#!/usr/bin/env python3
 # vim: set expandtab shiftwidth=4:
 # -*- Mode: python; coding: utf-8; indent-tabs-mode: nil -*- */
 #