adb: add Upgrade

adb/adb.go

@@ -236,8 +236,13 @@ func getFailureCode(r *regexp.Regexp, line string) string {
 
 var installFailureRegex = regexp.MustCompile(`^Failure \[INSTALL_(.+)\]$`)
 
-func (d *Device) Install(path string) error {
-	cmd := d.AdbCmd("install", path)
+func withOpts(cmd string, opts []string, args ...string) []string {
+	v := append([]string{"install"}, opts...)
+	return append(v, args...)
+}
+
+func (d *Device) install(opts []string, path string) error {
+	cmd := d.AdbCmd(withOpts("install", opts, path)...)
 	stdout, err := cmd.StdoutPipe()
 	if err != nil {
 		return err
@@ -252,6 +257,14 @@ func (d *Device) Install(path string) error {
 	return parseError(getFailureCode(installFailureRegex, line))
 }
 
+func (d *Device) Install(path string) error {
+	return d.install(nil, path)
+}
+
+func (d *Device) Upgrade(path string) error {
+	return d.install([]string{"-r"}, path)
+}
+
 func getResultLine(out io.ReadCloser) string {
 	scanner := bufio.NewScanner(out)
 	for scanner.Scan() {