yaml:"service.name" couldn't be parsed correctly after 46dea54a68b3e94c239093186902985c7ced97b5

[masterginger]

base.yaml

service:
  name: abc

main.go

package main

import (
	"go.uber.org/config"
	"fmt"
)

func main() {
	type ServiceConfig struct {
		Name string
	}
	type cfg struct {
		Name string `yaml:"service.name"`
                Service ServiceConfig
	}

	// provider, err := config.NewYAML(config.File("base.yaml"))
        provider, err := config.NewYAMLProviderFromFiles("base.yaml")
	if err != nil {
		panic(err) // handle error
	}

	var c cfg
	if err := provider.Get("").Populate(&c); err != nil {
		panic(err) // handle error
	}

	fmt.Printf("%+v\n", c)
}

Expected result:
{Name:abc {Service:{Name:abc}}

Actual result:
{Name: {Service:{Name:abc}}

Pinned down to 46dea54 after git bisect

[masterginger]

Any updates?

[twilly]

The cfg structure is asking for the scalar "service.name" and that is clearly not what is in your base.yaml. Get splits key names on periods and the underlying go-yaml/yaml does not. So if you want the underlying yaml parser to populate service mapping name scalar, then you'll need to unfold the cfg structure:

type cfg struct {
    Service struct {
        Name string
    }
}

If you prefer the period splitting behavior, then call Get(...).Populate(...) for every value you'd like to pick up.

I'd also try to avoid using go-yaml/yaml field tags if at all possible. The DSL behavior isn't prescribed in this package's documentation, nor is the leaking of go-yaml/yaml. You'd be in a tight spot if the backing parser were to be changed.