config: split up main file more and move tests into correct packages

This splits config.go into ui.go for the user interface functions and
authorize.go for the implementation of `rclone authorize`.

It also moves the tests into the correct places (including one from
obscure which was in the wrong place).

fs/config/authorize.go

@@ -0,0 +1,47 @@
+package config
+
+import (
+	"context"
+	"log"
+
+	"github.com/rclone/rclone/fs"
+)
+
+// Authorize is for remote authorization of headless machines.
+//
+// It expects 1 or 3 arguments
+//
+//   rclone authorize "fs name"
+//   rclone authorize "fs name" "client id" "client secret"
+func Authorize(ctx context.Context, args []string, noAutoBrowser bool) {
+	ctx = suppressConfirm(ctx)
+	switch len(args) {
+	case 1, 3:
+	default:
+		log.Fatalf("Invalid number of arguments: %d", len(args))
+	}
+	newType := args[0]
+	f := fs.MustFind(newType)
+	if f.Config == nil {
+		log.Fatalf("Can't authorize fs %q", newType)
+	}
+	// Name used for temporary fs
+	name := "**temp-fs**"
+
+	// Make sure we delete it
+	defer DeleteRemote(name)
+
+	// Indicate that we are running rclone authorize
+	Data.SetValue(name, ConfigAuthorize, "true")
+	if noAutoBrowser {
+		Data.SetValue(name, ConfigAuthNoBrowser, "true")
+	}
+
+	if len(args) == 3 {
+		Data.SetValue(name, ConfigClientID, args[1])
+		Data.SetValue(name, ConfigClientSecret, args[2])
+	}
+
+	m := fs.ConfigMap(f, name)
+	f.Config(ctx, name, m)
+}