go/src/cmd/go/internal/imports/scan.go

func ScanDir(dir string, tags map[string]bool) ([]string, []string, error) { … }

func ScanFiles(files []string, tags map[string]bool) ([]string, []string, error) { … }

func scanFiles(files []string, tags map[string]bool, explicitFiles bool) ([]string, []string, error) { … }

var ErrNoGo …

func keys(m map[string]bool) []string { … }