./batou secrets summary fails when one cannot decrypt a secret file

[frlan]

Traceback (most recent call last):
  File "/mybatou/.batou/f1e41f9f/bin/batou", line 33, in <module>
    sys.exit(load_entry_point('batou==2.2.4', 'console_scripts', 'batou')())
  File "/mybatou/.batou/f1e41f9f/lib/python3.9/site-packages/batou/main.py", line 149, in main
    args.func(**func_args)
  File "/mybatou/.batou/f1e41f9f/lib/python3.9/site-packages/batou/secrets/manage.py", line 109, in summary
    for e in Environment.all():
  File "/mybatou/.batou/f1e41f9f/lib/python3.9/site-packages/batou/secrets/manage.py", line 30, in all
    yield Environment(path=e)
  File "/mybatou/.batou/f1e41f9f/lib/python3.9/site-packages/batou/secrets/manage.py", line 19, in __init__
    self.f = EncryptedConfigFile(
  File "/mybatou/.batou/f1e41f9f/lib/python3.9/site-packages/batou/secrets/encryption.py", line 137, in __init__
    self.main_file = self.add_file(encrypted_file)
  File "/mybatou/.batou/f1e41f9f/lib/python3.9/site-packages/batou/secrets/encryption.py", line 148, in add_file
    f.read()
  File "/mybatou/.batou/f1e41f9f/lib/python3.9/site-packages/batou/secrets/encryption.py", line 70, in read
    self.cleartext = self._decrypt()
  File "/mybatou/.batou/f1e41f9f/lib/python3.9/site-packages/batou/secrets/encryption.py", line 96, in _decrypt
    return subprocess.check_output(args, stderr=NULL).decode("utf-8")
  File "/usr/local/Cellar/python@3.9/3.9.5/Frameworks/Python.framework/Versions/3.9/lib/python3.9/subprocess.py", line 424, in check_output
    return run(*popenargs, stdout=PIPE, timeout=timeout, check=True,
  File "/usr/local/Cellar/python@3.9/3.9.5/Frameworks/Python.framework/Versions/3.9/lib/python3.9/subprocess.py", line 528, in run
    raise CalledProcessError(retcode, process.args,
subprocess.CalledProcessError: Command '['gpg', '-q', '--no-tty', '--batch', '--decrypt', 'secrets/vagrant.cfg']' returned non-zero exit status 2.

On CLI I'd use something like

gpg --pinentry-mode cancel --list-packets secrets/vagrant.cfg