Demonstrating different struct tags used in app config structs.
go build .
./config-test
Output:
2022/09/27 00:22:23 Reading App config from config.yaml ...
2022/09/27 00:22:23 Reading App config from config.yaml ...
2022/09/27 00:22:23 Reading App config from config.yaml ...
2022/09/27 00:22:23 App config 1: &{ServerConfig:{Host:0.0.0.0 Port:8080 TlsPort:8443 DummyPort:1111}}
2022/09/27 00:22:23 App config 2: &{ServerConfig:{Host: Port:0 TlsPort:0 DummyPort:0}}
2022/09/27 00:22:23 App config 3: &{ServerConfig:{Host: Port:0 TlsPort:0 DummyPort:0}}
You'll notice that only the struct App config 1 is populated with the values in config.yaml. The other AppConfig structs failed to load values, even though they have yaml struct tags.