Add share link UI after upload

token.go

@@ -5,6 +5,7 @@ import (
 	"flag"
 	"fmt"
 	"os"
+	"path/filepath"
 	"text/tabwriter"
 	"time"
 
@@ -73,6 +74,7 @@ func tokenCommand(args []string) error {
 	if err != nil {
 		return err
 	}
+	warnIfUnusedDataDir(dataDir, tokensPath)
 
 	switch sub {
 	case "add":
@@ -96,6 +98,20 @@ func tokenCommand(args []string) error {
 	}
 }
 
+// warnIfUnusedDataDir flags the most likely mistake with this command: pointing
+// --data somewhere the server does not read, so a freshly minted token is never
+// seen and every request comes back 401. A data directory the server has opened
+// always has an objects/ subdirectory.
+func warnIfUnusedDataDir(dataDir, tokensPath string) {
+	if _, err := os.Stat(filepath.Join(dataDir, "objects")); err == nil {
+		return
+	}
+	fmt.Fprintf(os.Stderr,
+		"note: %s has no objects/ directory, so no server has used it.\n"+
+			"      Tokens written to %s are only read by a server started with --data %s\n\n",
+		dataDir, tokensPath, dataDir)
+}
+
 func tokenAdd(file *auth.File, name, maxSize, maxExpiry, defExpiry string, vanity, admin bool) error {
 	secret, err := store.NewSecret()
 	if err != nil {