func (d *Discovery) readFile(filename string) ([]*targetgroup.Group, error) {
	fd, err := os.Open(filename)
	if err != nil {
		return nil, err
	}
	defer fd.Close()

	content, err := ioutil.ReadAll(fd)
	if err != nil {
		return nil, err
	}

	info, err := fd.Stat()
	if err != nil {
		return nil, err
	}

	var targetGroups []*targetgroup.Group

	switch ext := filepath.Ext(filename); strings.ToLower(ext) {
	case ".json":
		if err := json.Unmarshal(content, &targetGroups); err != nil {
			return nil, err
		}
	case ".yml", ".yaml":
		if err := yaml.UnmarshalStrict(content, &targetGroups); err != nil {
			return nil, err
		}
	default:
		panic(errors.Errorf("discovery.File.readFile: unhandled file extension %q", ext))
	}

	for i, tg := range targetGroups {
		if tg == nil {
			err = errors.New("nil target group item found")
			return nil, err
		}

		tg.Source = fileSource(filename, i)
		if tg.Labels == nil {
			tg.Labels = model.LabelSet{}
		}
		tg.Labels[fileSDFilepathLabel] = model.LabelValue(filename)
	}

	d.writeTimestamp(filename, float64(info.ModTime().Unix()))

	return targetGroups, nil
}
func (d *Discovery) readFile(filename string) ([]*targetgroup.Group, error) {
	fd, err := os.Open(filename)
	if err != nil {
		return nil, err
	}
	defer fd.Close()

	content, err := ioutil.ReadAll(fd)
	if err != nil {
		return nil, err
	}

	info, err := fd.Stat()
	if err != nil {
		return nil, err
	}

	var targetGroups []*targetgroup.Group

	switch ext := filepath.Ext(filename); strings.ToLower(ext) {
	case ".json":
		if err := json.Unmarshal(content, &targetGroups); err != nil {
			return nil, err
		}
	case ".yml", ".yaml":
		if err := yaml.UnmarshalStrict(content, &targetGroups); err != nil {
			return nil, err
		}
	default:
		panic(errors.Errorf("discovery.File.readFile: unhandled file extension %q", ext))
	}

	for i, tg := range targetGroups {
		if tg == nil {
			err = errors.New("nil target group item found")
			return nil, err
		}

		tg.Source = fileSource(filename, i)
		if tg.Labels == nil {
			tg.Labels = model.LabelSet{}
		}
		tg.Labels[fileSDFilepathLabel] = model.LabelValue(filename)
	}

	d.writeTimestamp(filename, float64(info.ModTime().Unix()))

	return targetGroups, nil
}
func ( d * Discovery ) readFile ( filename string ) ( [ ] * targetgroup . Group , error ) { fd , err := os . Open ( filename ) if err != nil { return nil , err } defer fd . Close ( ) content , err := ioutil . ReadAll ( fd ) if err != nil { return nil , err } info , err := fd . Stat ( ) if err != nil { return nil , err } var targetGroups [ ] * targetgroup . Group switch ext := filepath . Ext ( filename ) ; strings . ToLower ( ext ) { case " " : if err := json . Unmarshal ( content , & targetGroups ) ; err != nil { return nil , err } case " " , " " : if err := yaml . UnmarshalStrict ( content , & targetGroups ) ; err != nil { return nil , err } default : panic ( errors . Errorf ( " " , ext ) ) } for i , tg := range targetGroups { if tg == nil { err = errors . New ( " " ) return nil , err } tg . Source = fileSource ( filename , i ) if tg . Labels == nil { tg . Labels = model . LabelSet { } } tg . Labels [ fileSDFilepathLabel ] = model . LabelValue ( filename ) } d . writeTimestamp ( filename , float64 ( info . ModTime ( ) . Unix ( ) ) ) return targetGroups , nil }
// readFile reads a JSON or YAML list of targets groups from the file, depending on its
// file extension. It returns full configuration target groups.
readFile reads a JSON or YAML list of targets groups from the file depending on its file extension . It returns full configuration target groups .