Warnings for overwritten variables

[mlanett]

Currently there is a warning when chamber loads variables from multiple services, and the variables overwrite each other.

For our use case this results in MANY warnings, because we organize services in a hierarchy of defaults and production, e.g.
/default/myservice/…
/production/myservice/…

In this case many defaults get overwritten and emit warnings. But the overwriting is intentional.

We are thinking of adding a flag, either "--no-warn-on-overwrite" default false, or "--warn-on-overwrite" default true.

We prefer flags with positive wording, e.g. "--warn-on-overwrite" but chamber does not have any positive wording flags which default true. They all default false. In this case we have no choice: either the flag is positive, default true, or negative wording, default false. (We think the 3rd option of "positive wording, default true, but change to default false in the future" is probably not desirable.)

Do the maintainers have a preference?

[mlanett]

I created #646 to implement this.