Is there any way to change a subset of variables in config depending on environment? What I'd like ...

# ktor

[Horv]

Is there any way to change a subset of variables in config depending on environment?

What I'd like is something like

application.conf
    variable1: value1
    variable2: value2

application-dev.conf
    variable3: value3

And be able to run the application with both application.conf and application-dev.conf applied. Or possibly 1 config file but evaluate different configs depending on environment variables. When reading up on HOCON I couldn't find it it supports any kind of ternary operator or so.

[Ben]

You could just pass in another config in the command line https://ktor.io/servers/configuration.html#command-line

[obobo]

You can load Hocon by hand, too: if you pass in -Dconfig.file=application.conf it will load in reference.conf and then merge application.conf onto it
And then you can instance your server like

val hoconConfig = ConfigFactory.load().resolve()
server = embeddedServer(YourEngine, applicationEngineEnvironment {
config = HoconApplicationConfig(hoconConfig)
}).start()