Method Copy

pkg/cmd/release/download/download.go:389–418

Copy writes the data from r into a file specified by name.

(name string, r io.Reader)

// Copy writes the data from r into a file specified by name.
func (w destinationWriter) Copy(name string, r io.Reader) (copyErr error) {
	fp := w.makePath(name)
	if fp == "-" {
		_, copyErr = io.Copy(w.stdout, r)
		return
	}
	if copyErr = w.check(fp); copyErr != nil {
		return
	}

	if dir := filepath.Dir(fp); dir != "." {
		if copyErr = os.MkdirAll(dir, 0755); copyErr != nil {
			return
		}
	}

	var f *os.File
	if f, copyErr = os.OpenFile(fp, os.O_WRONLY|os.O_CREATE|os.O_TRUNC, 0644); copyErr != nil {
		return
	}

	defer func() {
		if err := f.Close(); copyErr == nil && err != nil {
			copyErr = err
		}
	}()

	_, copyErr = io.Copy(f, r)
	return
}

func isWindowsReservedFilename(filename string) bool {
	// Windows terminals should prevent the creation of these files