🐞 fix: Check when public key is omitted

Author: yoshi389111

caesar/pubkeylib/pubkey.go

@@ -43,6 +43,9 @@ func ParseAuthKey(authKey string) (caesar.PublicKey, error) {
 }
 
 func GetPubKeys(target string) ([]caesar.PublicKey, error) {
+	if target == "" {
+		return nil, nil
+	}
 
 	bytes, err := readTarget(target)
 	if err != nil {

main.go

@@ -39,6 +39,10 @@ func main() {
 		}
 
 	} else {
+		if oppoPubKeys == nil {
+			fmt.Fprintf(os.Stderr, "git-caesar: `-u` option missing\n")
+			os.Exit(1)
+		}
 		outBytes, err = encrypt(oppoPubKeys, prvKey, inBytes)
 		if err != nil {
 			panic(err)