[Bug]: Can't use the configs defined in a submodule.

[sumedhe]

Description

When using configurations in the ballerina config model, we are defining types that correspond to the configs in the toml file. I have encountered the following issue with configuration usage.

Steps to Reproduce

1. Create a new ballerina app and create two modules named mymodule.
2. Create the Config.toml file in the root of the project.

   [myconfig]
   port = 8005

3. In the myconfig file, define a config type as below.

   public type ServerConfig record {
       int port;
   };
   
   public configurable ServerConfig myconfig = {
       port: 8081
   };

4. in the main.bal file use the config initialized in the mymodule as below.

   public function main() {
       io:print(mymodule:myconfig.port);
   }

5. Start with bal run and it will show the following error.

   Running executable
   
   error: [Config.toml:(11:1,12:12)] unused configuration value 'myconfig'
   error: [Config.toml:(12:1,12:12)] unused configuration value 'myconfig.port'

Affected Version(s)

Ballerina 2201.5.0 (Swan Lake Update 5)
Language specification 2022R4
Update Tool 1.3.14

OS, DB, other environment details and versions

Linux

Related area

-> Compilation

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[MaryamZi]

Since myconfig.bal is just another file in the same module, you don't have to use mymodule: to access the myconfig variable.

import ballerina/io;

public function main() {
    io:print(myconfig.port);
}

To move this to a different module, you need to add the module with

bal add myconfig

This will add the module in modules/myconfig. Once you move the config code to that module, you'll have to update the main.bal file to import the module.

import mymodule.myconfig;

import ballerina/io;

public function main() {
    io:print(myconfig:myconfig.port);
}

Note that you'll also have to update the Config.toml file.

[mymodule.myconfig]
myconfig.port = 8005

Also see https://ballerina.io/learn/organize-ballerina-code/