I understand that removing implicit configuration is the right way to go but giving easy access to default YAML configuration files
synchronized with each configuration change will be a great helper here.
Indeed, I got back working on the NPM loader but I got stuck on the following `swh-objstorage` error
that suddenly appeared:
```
Traceback (most recent call last):
File "/home/antoine/swh/swh-environment/swh-loader-core/swh/loader/core/loader.py", line 894, in load
self.store_data()
File "/home/antoine/swh/swh-environment/swh-loader-npm/swh/loader/npm/loader.py", line 245, in store_data
self.flush()
File "/home/antoine/swh/swh-environment/swh-loader-core/swh/loader/core/loader.py", line 704, in flush
self.send_batch_contents(contents)
File "/home/antoine/swh/swh-environment/swh-loader-core/swh/loader/core/loader.py", line 647, in send_batch_contents
packet_size_bytes=packet_size_bytes)
File "/home/antoine/swh/swh-environment/swh-loader-core/swh/loader/core/loader.py", line 46, in send_in_packets
sender(formatted_objects)
File "/usr/lib/python3/dist-packages/retrying.py", line 49, in wrapped_f
return Retrying(*dargs, **dkw).call(f, *args, **kw)
File "/usr/lib/python3/dist-packages/retrying.py", line 206, in call
return attempt.get(self._wrap_exception)
File "/usr/lib/python3/dist-packages/retrying.py", line 247, in get
six.reraise(self.value[0], self.value[1], self.value[2])
File "/usr/lib/python3/dist-packages/six.py", line 686, in reraise
raise value
File "/usr/lib/python3/dist-packages/retrying.py", line 200, in call
attempt = Attempt(fn(*args, **kwargs), attempt_number, False)
File "/home/antoine/swh/swh-environment/swh-loader-core/swh/loader/core/loader.py", line 400, in send_contents
self.storage.content_add(content_list)
File "/home/antoine/swh/swh-environment/swh-storage/swh/storage/api/client.py", line 23, in content_add
return self.post('content/add', {'content': content})
File "/home/antoine/swh/swh-environment/swh-core/swh/core/api/__init__.py", line 185, in post
return self._decode_response(response)
File "/home/antoine/swh/swh-environment/swh-core/swh/core/api/__init__.py", line 220, in _decode_response
raise pickle.loads(decode_response(response))
swh.core.api.RemoteException: Unexpected status code for API request: 413 (b'413: Request Entity Too Large')
```
It took me some time to understand that some changes were made in configuration and that my configuration should have been
updated to the following (I was missing the `client_max_size` entry):
```
objstorage:
cls: 'pathslicing'
args:
root: '/home/antoine/swh/objects/'
slicing: '0:2/2:4/4:6'
client_max_size: 8388608
```
Having the expected configuration clearly exposed somewhere would have greatly help me here.
So I think exposing default configuration for each swh component, maybe in a separate repository,
could be useful.