packer-cn/builder/googlecompute/account.go

48 lines
1.2 KiB
Go

package googlecompute
import (
"fmt"
"io/ioutil"
"os"
"golang.org/x/oauth2/google"
"golang.org/x/oauth2/jwt"
)
type ServiceAccount struct {
jsonKey []byte
jwt *jwt.Config
}
// ProcessAccountFile will return a ServiceAccount for the JSON account file stored in text.
// Otherwise it will return an error if text does not look or reference a valid account file.
func ProcessAccountFile(text string) (*ServiceAccount, error) {
// Assume text is a JSON string
if conf, err := google.JWTConfigFromJSON([]byte(text), DriverScopes...); err == nil {
return &ServiceAccount{
jsonKey: []byte(text),
jwt: conf,
}, nil
}
// If text was not JSON, assume it is a file path instead
if _, err := os.Stat(text); os.IsNotExist(err) {
return nil, fmt.Errorf("account_file path does not exist: %s", text)
}
data, err := ioutil.ReadFile(text)
if err != nil {
return nil, fmt.Errorf("Error reading account_file from path '%s': %s", text, err)
}
conf, err := google.JWTConfigFromJSON(data, DriverScopes...)
if err != nil {
return nil, fmt.Errorf("Error parsing account_file: %s", err)
}
return &ServiceAccount{
jsonKey: data,
jwt: conf,
}, nil
}