config: do not open browser on headless if google fs

On google fs (drive, google photos, and google cloud storage), if
headless is selected, do not open browser.

This also supplies a new option "auth-no-open-browser" for authorize
if the user does not want it.

This should fix #3323.

cmd/authorize/authorize.go

@@ -3,11 +3,18 @@ package authorize
 import (
 	"github.com/rclone/rclone/cmd"
 	"github.com/rclone/rclone/fs/config"
+	"github.com/rclone/rclone/fs/config/flags"
 	"github.com/spf13/cobra"
 )
 
+var (
+	noAutoBrowser bool
+)
+
 func init() {
 	cmd.Root.AddCommand(commandDefinition)
+	cmdFlags := commandDefinition.Flags()
+	flags.BoolVarP(cmdFlags, &noAutoBrowser, "auth-no-open-browser", "", false, "Do not automatically open auth link in default browser")
 }
 
 var commandDefinition = &cobra.Command{
@@ -16,9 +23,12 @@ var commandDefinition = &cobra.Command{
 	Long: `
 Remote authorization. Used to authorize a remote or headless
 rclone from a machine with a browser - use as instructed by
-rclone config.`,
+rclone config.
+
+Use the --auth-no-open-browser to prevent rclone to open auth
+link in default browser automatically.`,
 	Run: func(command *cobra.Command, args []string) {
 		cmd.CheckArgs(1, 3, command, args)
-		config.Authorize(args)
+		config.Authorize(args, noAutoBrowser)
 	},
 }

docs/content/commands/rclone_authorize.md

@@ -22,7 +22,8 @@ rclone authorize [flags]
 ### Options
 
 ```
-  -h, --help   help for authorize
+  --auth-no-open-browser   Do not automatically open auth link in default browser
+  -h, --help               help for authorize
 ```
 
 See the [global flags page](/flags/) for global options not listed here.

fs/config/config.go

@@ -62,6 +62,9 @@ const (
 
 	// ConfigAuthorize indicates that we just want "rclone authorize"
 	ConfigAuthorize = "config_authorize"
+
+	// ConfigAuthNoBrowser indicates that we do not want to open browser
+	ConfigAuthNoBrowser = "config_auth_no_browser"
 )
 
 // Global
@@ -1299,7 +1302,7 @@ func SetPassword() {
 //
 //   rclone authorize "fs name"
 //   rclone authorize "fs name" "client id" "client secret"
-func Authorize(args []string) {
+func Authorize(args []string, noAutoBrowser bool) {
 	defer suppressConfirm()()
 	switch len(args) {
 	case 1, 3:
@@ -1319,10 +1322,15 @@ func Authorize(args []string) {
 
 	// Indicate that we are running rclone authorize
 	getConfigData().SetValue(name, ConfigAuthorize, "true")
+	if noAutoBrowser {
+		getConfigData().SetValue(name, ConfigAuthNoBrowser, "true")
+	}
+
 	if len(args) == 3 {
 		getConfigData().SetValue(name, ConfigClientID, args[1])
 		getConfigData().SetValue(name, ConfigClientSecret, args[2])
 	}
+
 	m := fs.ConfigMap(f, name)
 	f.Config(name, m)
 }

lib/oauthutil/oauthutil.go

@@ -386,6 +386,8 @@ func doConfig(id, name string, m configmap.Mapper, oauthConfig *oauth2.Config, o
 	oauthConfig, changed := overrideCredentials(name, m, oauthConfig)
 	authorizeOnlyValue, ok := m.Get(config.ConfigAuthorize)
 	authorizeOnly := ok && authorizeOnlyValue != "" // set if being run by "rclone authorize"
+	authorizeNoAutoBrowserValue, ok := m.Get(config.ConfigAuthNoBrowser)
+	authorizeNoAutoBrowser := ok && authorizeNoAutoBrowserValue != ""
 
 	// See if already have a token
 	tokenString, ok := m.Get("token")
@@ -470,9 +472,13 @@ func doConfig(id, name string, m configmap.Mapper, oauthConfig *oauth2.Config, o
 		authURL = "http://" + bindAddress + "/auth?state=" + state
 	}
 
-	// Open the URL for the user to visit
-	_ = open.Start(authURL)
-	fmt.Printf("If your browser doesn't open automatically go to the following link: %s\n", authURL)
+	if !authorizeNoAutoBrowser && oauthConfig.RedirectURL != TitleBarRedirectURL {
+		// Open the URL for the user to visit
+		_ = open.Start(authURL)
+		fmt.Printf("If your browser doesn't open automatically go to the following link: %s\n", authURL)
+	} else {
+		fmt.Printf("Please go to the following link: %s\n", authURL)
+	}
 	fmt.Printf("Log in and authorize rclone for access\n")
 
 	// Read the code via the webserver or manually