gistfile1.go

func (cfg *configuration) Load() error {
	paths := make([]string, 0)
	fdir := filepath.Dir(pathToThisFile())
 
	config := []string{fmt.Sprintf("%s/../config.cfg", fdir)}
	paths = findConfig(config, paths)
 
        // we look in multiple places because in production we have the secrets deployed out the the /etc location 
        // instead of shipping with the app, this allows us to keep production secrets more secure
	secrets_config := []string{fmt.Sprintf("%s/../config-secrets.cfg", fdir), "/etc/myapp/config-secrets.cfg"}
	paths = findConfig(secrets_config, paths)
 
	cfg.mtx.Lock()
	defer cfg.mtx.Unlock()
 
	for _, p := range paths {
		err := gcfg.ReadFileInto(cfg, p)
		if err != nil {
			return err
		}
	}
	return nil
}
 
// the caveat here is this assumes the binary is run from the same place its built
// see the full example for one workaround https://gist.github.com/jgoulah/9a5009a34d7ce9f872a8
func pathToThisFile() string {
	_, file, _, _ := runtime.Caller(0)
	return file
}
 
func findConfig(locations []string, paths []string) []string {
	for _, c := range locations {
		if _, err := os.Stat(c); err == nil {
			paths = append(paths, c)
		}
	}
	return paths
}