Could viper support merge two config files?

[ahuigo]

I have serval env config file:

config/
    default.yaml
    conf_dev.yaml
    conf_test.yaml
    conf_production.yaml

Could viper support merge two config files(e.g. default.yaml+conf_dev.yaml )

[sagikazarmark]

Currently Viper only supports a single file source. If/when #889 gets implemented, this should be possible. Closing as the linked issue covers this use case and we can track it there.

[ahuigo]

A demo to merge multiple yaml files via viper:
https://tonybai.com/2022/09/20/use-viper-to-do-merge-of-yml-configuration-files/