我如何输出在Docker-Compose.yml的Yaml解组中抛出错误的行？

Question

I'm writing some code that takes in a Docker-Compose.yml and unmarshals it into a struct. I take the docker compose data in as a []byte.

    dockerData []byte
    var struct *struct
    if err := yaml.Unmarshal(dockerData, &struct)

I run a lot of compose files through this process. When errors are thrown, is there a way to output the line or section of the compose file that threw the error?

Answer 1

Set flag on the logger to print out the line number

// main.go or config file

func init() {
    log.SetFlags(log.LstdFlags | log.Lshortfile)
}

You can find more of these flags here

handle the error

dockerData []byte
var struct *struct
if err := yaml.Unmarshal(dockerData, &struct); err != nil {
    log.Print(err)
}