Avoid exception traceback with "towncrier check" #336
Description
Situation
When calling towncrier check in a directory without any Towncrier config files, you get this exception:
$ mkdir /tmp/towncrier-test; cd /tmp/towncrier-test
$ python3 -m venv .env
$ source .env/bin/activate
$ .env/bin/pip install towncrier
$ pip show towncrier
Name: towncrier
Version: 21.3.0
[...]
Location: /tmp/towncrier-test/.env/lib/python3.6/site-packages
$ .env/bin/towncrier check
Traceback (most recent call last):
File ".env/bin/towncrier", line 8, in <module>
sys.exit(cli())
File "/tmp/towncrier-test/.env/lib64/python3.6/site-packages/click/core.py", line 829, in __call__
return self.main(*args, **kwargs)
File "/tmp/towncrier-test/.env/lib64/python3.6/site-packages/click/core.py", line 782, in main
rv = self.invoke(ctx)
File "/tmp/towncrier-test/.env/lib64/python3.6/site-packages/click/core.py", line 1259, in invoke
return _process_result(sub_ctx.command.invoke(sub_ctx))
File "/tmp/towncrier-test/.env/lib64/python3.6/site-packages/click/core.py", line 1066, in invoke
return ctx.invoke(self.callback, **ctx.params)
File "/tmp/towncrier-test/.env/lib64/python3.6/site-packages/click/core.py", line 610, in invoke
return callback(*args, **kwargs)
File "/tmp/towncrier-test/.env/lib64/python3.6/site-packages/towncrier/check.py", line 27, in _main
return __main(compare_with, directory, config)
File "/tmp/towncrier-test/.env/lib64/python3.6/site-packages/towncrier/check.py", line 32, in __main
base_directory, config = load_config_from_options(directory, config)
File "/tmp/towncrier-test/.env/lib64/python3.6/site-packages/towncrier/_settings.py", line 49, in load_config_from_options
"No configuration file found.\nLooked in: %s" % (base_directory,)
towncrier._settings.ConfigError: No configuration file found.
Looked in: /tmp/towncrier-test
Proposed solution
The traceback shouldn't be displayed. Don't frighten our users. 😉 IMHO it's completely enough if we catch it and output only the error message:
$ .env/bin/towncrier check
towncrier._settings.ConfigError: No configuration file found.
Looked in: /tmp/towncrier-test
$ echo $?
1
Possible dependencies
Maybe related to #306