Nested config over environment variables

[strarsis]

How can I pass nested configuration over environment variables?
What delimiter can I use for separating keys?
It would be helpful when an example is added to documentation.

[strarsis]

Colons (:) cause trouble/aren't possible in environment variable names.

I found a tutorial page where environment variables with separator are used: http://www.codedependant.net/2015/01/31/production-ready-node-configuration/

This example allows to use environment variables with double underscore (__) separator:

[...]
nconf
  .env({separator:'__'}) 
[...]

With this setting, an environment variable for nested config

export db__host="test"

equals to config key with default colon (:) delimiter

db:host="test"

[simonrenoult]

This feature is already mentioned in the documentation: https://github.com/indexzero/nconf#env

[Redsandro]

Colons (:) cause trouble

@strarsis the trouble causing colon seems arbitrary; in some situations they work fine: #336. Have you figured out why they sometimes don't work?

Sorry for bumping an old issue. Google brought me here. It is still relevant.

[linqFR]

This feature is already mentioned in the documentation: https://github.com/indexzero/nconf#env

Hello
well to be honest : the explanation is not clear !

• will .env('--' ) change separator only for env store or all stores?
  i tried many ways and so far just seems to work on env !

• how do i change default separator for files or in memory ?

• will the new separator always work for .required()?

• I saw some explanation over internet about env({separator:'xx',whitelist:['blah','bloah']}) : can you explain/document more in details? Is this working also for file && memory stores?

[mhamann]

I agree--this feature doesn't necessarily work how you might expect. This PR is a breaking change, but I think makes it clearer. Feedback welcome: #337

[linqFR]

@mhamann
thank you

what about .required() and whitelist?