go Lang load unable to process yaml file

I am trying to read a yaml file and store it in a variable but for some reason the array object in YAML file is unable to unmarshall the file. it shows blank data.

Below is my yaml file content

---
version: "1.2"

bUnits:
  - name: buname
    buGroupID: asd
    buStGroupID: asd
  - name: buname2
    buGroupID: asd2
    buStGroupID: asd2

Below is the code that am using

type SResponse struct {
   Version       string         `json:"version"`
   BUnits []BUnit `json:"bUnits"`
}

type BUnit struct {
	Name                      string `json:"name"`
    BuUnitGroupID       string `json:"buGroupID"`
    BuUnitStGroupID string `json:"buStaticGroupID"`
}
func main() {

    _printf := fmt.Printf
    _printf("Start")
    var sListResponse SResponse

    source, err2 := ioutil.ReadFile("squads2.yml")

    if err2 != nil {
    	_printf("Couldn't read yaml file.")
}

    err2 = yaml.Unmarshal(source, &sListResponse)
    if err2 != nil {
	_printf("Error")
    }

    _printf("Output: %s\n", sListResponse)
}

The code reads version part but the bUnits array comes empty.Please suggest.

Your structs are decorated with json tags - which you may or may not need (depending on if you are exporting/import this data in JSON later).
But your problem at hand is with yaml importing - so you need to decorate your struct definitions with yaml tags.

To support both json and yaml marshaling/unmarshaling, simply update your tags like so:

type SResponse struct {
	Version string  `json:"version" yaml:"version"`
	BUnits  []BUnit `json:"bUnits" yaml:"bUnits"`
}

type BUnit struct {
	Name            string `json:"name" yaml:"name"`
	BuUnitGroupID   string `json:"buGroupID" yaml:"buGroupID"`
	BuUnitStGroupID string `json:"buStaticGroupID" yaml:"buStaticGroupID"`
}

Or just drop the json tags if you have no need for JSON encoding/decoding.

you should use yaml tag in your struct

type SResponse struct {
	Version string  `yaml:"version"`
	BUnits  []BUnit `yaml:"bUnits"`
}

type BUnit struct {
	Name            string `yaml:"name"`
	BuUnitGroupID   string `yaml:"buGroupID"`
	BuUnitStGroupID string `yaml:"buStaticGroupID"`
}