Value from environment about fig HOT 3 CLOSED

This is something which I've been considering to add and I'll get down it to when I find some free time (hopefully soon!).

I'm not entirely sure what you mean in your example, where would ${FOOBAR} be defined, can you please elaborate?

These are my thoughts regarding environment variables. Let's say you have the following struct defined:

type Config struct {
   type Server struct {
       Level string `fig:"level"`
   } `fig:"server"`
}

You'd be able to set the Level field using environment variable SERVER_LEVEL. There would be additional options such as adding a prefix to all variables, i.e. MYAPP_SERVER_LEVEL and a custom separator i.e. MYAPP-SERVER-LEVEL.

Please share your thoughts!

from fig.

I prefer the way I outlined above since it keeps definitions the same, in contrast to your suggestion which introduces additional syntax specific to environment variables. Loading from the environment however should be disabled by default in order to avoid accidental loading of fields, with an option for enabling it.

from fig.

E.g. in the config:

path: '/srv/projects/${FOOBAR}'

Or maybe even in the struct tags, but then they would have to provide the whole value.

from fig.