ExternalCommand - unable to use dolar sign '$' in arguments to the external command

[pawelwod]

Adding this kind of ExternalCommand

...
[check.ExternalCommand]
enabled = true
command = test $(date +%H) -gt 7
...

Will result in

...
Feb 09 16:39:41 rzutnik autosuspend[424770]: 2025-02-09 16:39:41,891 - autosuspend - INFO - Configuring check Load with class Load from module autosuspend.checks.activity using config parameters {'enabled': 'true', 'threshold': '10'}
Feb 09 16:39:44 rzutnik autosuspend[424770]: Traceback (most recent call last):
Feb 09 16:39:44 rzutnik autosuspend[424770]:   File "/usr/bin/autosuspend", line 33, in <module>
Feb 09 16:39:44 rzutnik autosuspend[424770]:     sys.exit(load_entry_point('autosuspend==6.0.0', 'console_scripts', 'autosuspend')())
Feb 09 16:39:44 rzutnik autosuspend[424770]:              ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Feb 09 16:39:44 rzutnik autosuspend[424770]:   File "/usr/lib/python3/dist-packages/autosuspend/__init__.py", line 793, in main
Feb 09 16:39:44 rzutnik autosuspend[424770]:     args.func(args, config)
Feb 09 16:39:44 rzutnik autosuspend[424770]:   File "/usr/lib/python3/dist-packages/autosuspend/__init__.py", line 760, in main_daemon
Feb 09 16:39:44 rzutnik autosuspend[424770]:     checks = set_up_checks(
Feb 09 16:39:44 rzutnik autosuspend[424770]:              ^^^^^^^^^^^^^^
Feb 09 16:39:44 rzutnik autosuspend[424770]:   File "/usr/lib/python3/dist-packages/autosuspend/__init__.py", line 481, in set_up_checks
Feb 09 16:39:44 rzutnik autosuspend[424770]:     _set_up_single_check(section, prefix, internal_module, target_class)
Feb 09 16:39:44 rzutnik autosuspend[424770]:   File "/usr/lib/python3/dist-packages/autosuspend/__init__.py", line 425, in _set_up_single_check
Feb 09 16:39:44 rzutnik autosuspend[424770]:     config_section_string(section),
Feb 09 16:39:44 rzutnik autosuspend[424770]:     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Feb 09 16:39:44 rzutnik autosuspend[424770]:   File "/usr/lib/python3/dist-packages/autosuspend/__init__.py", line 380, in config_section_string
Feb 09 16:39:44 rzutnik autosuspend[424770]:     data = {k: v if k != "password" else "<redacted>" for k, v in section.items()}
Feb 09 16:39:44 rzutnik autosuspend[424770]:            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Feb 09 16:39:44 rzutnik autosuspend[424770]:   File "<frozen _collections_abc>", line 894, in __iter__
Feb 09 16:39:44 rzutnik autosuspend[424770]:   File "/usr/lib/python3.12/configparser.py", line 1225, in __getitem__
Feb 09 16:39:44 rzutnik autosuspend[424770]:     return self._parser.get(self._name, key)
Feb 09 16:39:44 rzutnik autosuspend[424770]:            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Feb 09 16:39:44 rzutnik autosuspend[424770]:   File "/usr/lib/python3.12/configparser.py", line 777, in get
Feb 09 16:39:44 rzutnik autosuspend[424770]:     return self._interpolation.before_get(self, section, option, value,
Feb 09 16:39:44 rzutnik autosuspend[424770]:            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Feb 09 16:39:44 rzutnik autosuspend[424770]:   File "/usr/lib/python3.12/configparser.py", line 428, in before_get
Feb 09 16:39:44 rzutnik autosuspend[424770]:     self._interpolate_some(parser, option, L, value, section, defaults, 1)
Feb 09 16:39:44 rzutnik autosuspend[424770]:   File "/usr/lib/python3.12/configparser.py", line 488, in _interpolate_some
Feb 09 16:39:44 rzutnik autosuspend[424770]:     raise InterpolationSyntaxError(
Feb 09 16:39:44 rzutnik autosuspend[424770]: configparser.InterpolationSyntaxError: '$' must be followed by '$' or '{', found: '$(date +%H) -gt 7'
Feb 09 16:39:45 rzutnik systemd[1]: autosuspend.service: Main process exited, code=exited, status=1/FAILURE
Feb 09 16:39:45 rzutnik systemd[1]: autosuspend.service: Failed with result 'exit-code'.
Feb 09 16:39:45 rzutnik systemd[1]: autosuspend.service: Consumed 3.665s CPU time.
...

Looks like the configuration values might not be escaped properly.

[languitar]

The Dollar sign has a special meaning to the configuration mechanism (interpolation). Try to use two dollar signs to escape the special meaning.