TST: Actually check that postconf introspection works.

test cases/common/144 mesonintrospect from scripts/check_introspection.py

@@ -0,0 +1,18 @@
+#!/usr/bin/env python3
+
+import os
+import shlex
+import subprocess
+
+
+if 'MESONINTROSPECT' not in os.environ:
+    raise RuntimeError('MESONINTROSPECT not found')
+if 'MESON_BUILD_ROOT' not in os.environ:
+    raise RuntimeError('MESON_BUILD_ROOT not found')
+
+mesonintrospect = os.environ['MESONINTROSPECT']
+introspect_arr = shlex.split(mesonintrospect)
+
+buildroot = os.environ['MESON_BUILD_ROOT']
+
+subprocess.check_output([*introspect_arr, '--all', buildroot])

test cases/common/144 mesonintrospect from scripts/meson.build

@@ -10,5 +10,5 @@ else
   message(ret.stderr())
 endif
 
-meson.add_postconf_script('check_env.py')
+meson.add_postconf_script('check_introspection.py')
 meson.add_install_script('check_env.py')