Emulate $_ when using exec to run EB

Author: Flamefire

easybuild/main.py

@@ -230,6 +230,11 @@ def main(args=None, logfile=None, do_build=None, testing=False, modtool=None):
     if 'CDPATH' in os.environ:
         del os.environ['CDPATH']
 
+    # When EB is run via `exec` the special bash variable $_ is not set
+    # So emulate this here to allow (module) scripts depending on that to work
+    if '_' not in os.environ:
+        os.environ['_'] = os.path.basename(sys.executable or 'python')
+
     # purposely session state very early, to avoid modules loaded by EasyBuild meddling in
     init_session_state = session_state()