Function scanDirectory

scripts/metricsdocgen/scanner/scanner.go:149–188

scanDirectory recursively walks a directory and extracts metrics from all Go files.

(root string)

// scanDirectory recursively walks a directory and extracts metrics from all Go files.
func scanDirectory(root string) ([]Metric, error) {
	var metrics []Metric

	err := filepath.WalkDir(root, func(path string, d fs.DirEntry, err error) error {
		if err != nil {
			return err
		}

		// Skip non-Go files.
		if d.IsDir() || !strings.HasSuffix(path, ".go") {
			return nil
		}

		// Skip test files.
		if strings.HasSuffix(path, "_test.go") {
			return nil
		}

		// Skip files listed in skipPaths.
		for _, sp := range skipPaths {
			if path == sp {
				return nil
			}
		}

		fileMetrics, err := scanFile(path)
		if err != nil {
			return xerrors.Errorf("scanning %s: %w", path, err)
		}

		if len(fileMetrics) > 0 {
			logf("scanning %s: found %d metrics", path, len(fileMetrics))
		}
		metrics = append(metrics, fileMetrics...)

		return nil
	})

	return metrics, err
}

// scanFile parses a single Go file and extracts all Prometheus metric definitions.
func scanFile(path string) ([]Metric, error) {