airflow scheduler -p command not working in airflow 2.0.1

[Vineet-Sharma29]

Apache Airflow version:
2.0.1

Kubernetes version (if you are using kubernetes) (use kubectl version):

Environment:

• Cloud provider or hardware configuration: 4GB RAM, Processor - Intel(R) Core(TM) i5-8250U CPU @ 1.60GHz
• OS (e.g. from /etc/os-release): 18.04.5 LTS (Bionic Beaver)
• Kernel (e.g. uname -a): Linux 4.15.0-136-generic
• Install tools: bare metal installation as per commands given here

What happened:

On running airflow scheduler -p got following error:-

Traceback (most recent call last):
  File "/home/vineet/Documents/projects/venv/bin/airflow", line 8, in <module>
    sys.exit(main())
  File "/home/vineet/Documents/projects/venv/lib/python3.6/site-packages/airflow/__main__.py", line 40, in main
    args.func(args)
  File "/home/vineet/Documents/projects/venv/lib/python3.6/site-packages/airflow/cli/cli_parser.py", line 48, in command
    return func(*args, **kwargs)
  File "/home/vineet/Documents/projects/venv/lib/python3.6/site-packages/airflow/utils/cli.py", line 86, in wrapper
    metrics = _build_metrics(f.__name__, args[0])
  File "/home/vineet/Documents/projects/venv/lib/python3.6/site-packages/airflow/utils/cli.py", line 118, in _build_metrics
    full_command[idx + 1] = "*" * 8
IndexError: list assignment index out of range

As per docs, -p flag is a valid flag and gives correct result for airflow scheduler --do-pickle

How to reproduce it:
Install airflow 2.0.1 and run airflow scheduler -p

[boring-cyborg]

Thanks for opening your first issue here! Be sure to follow the issue template!

[XD-DENG]

I can confirm this issue.

That's because _build_metrics() checks the arg, and tries to mask value for password. When it sees -p, it assumes there is another value following, which is password (that's why there is idx + 1).

This assumption fails in scheduler scenario though, because it can simply be airflow scheduler -p.