Fix: add netlab environment variables to reporting environment

The 'netlab report' command used the transformed topology snapshot as
the source of reporting data, which prevented the report modification
with environment variables (use case: #2562).

This change adds NETLAB_ environment variables to the topology data,
allowing users to modify report contents with environment variables.

Author: ipspace

netsim/cli/report.py

@@ -8,7 +8,7 @@
 
 from . import load_snapshot,_nodeset,parser_lab_location,parser_add_verbose
 from ..outputs import _TopologyOutput, common as outputs_common
-from ..utils import strings,log
+from ..utils import strings,log,read as _read
 
 #
 # CLI parser for 'netlab report' command
@@ -36,6 +36,7 @@ def report_parse(args: typing.List[str]) -> argparse.Namespace:
 def run(cli_args: typing.List[str]) -> None:
   args = report_parse(cli_args)
   topology = load_snapshot(args)
+  _read.include_environment_defaults(topology)
   report_module = _TopologyOutput.load(
                      f'report:{args.report}={args.output or "-"}',
                      topology.defaults.outputs.report)