feat(completion): support no space format of short flags https://github.com/spf13/cobra/issues/1629

completions.go

@@ -480,7 +480,7 @@ func getFlagNameCompletions(flag *pflag.Flag, toComplete string) []string {
 	}
 
 	flagName = "-" + flag.Shorthand
-	if len(flag.Shorthand) > 0 && strings.HasPrefix(flagName, toComplete) {
+	if len(flag.Shorthand) > 0 && (strings.HasPrefix(flagName, toComplete) || strings.HasPrefix(toComplete, flagName)) {
 		completions = append(completions, fmt.Sprintf("%s\t%s", flagName, flag.Usage))
 	}
 

completions_test.go

@@ -473,6 +473,32 @@ func TestValidArgsFuncAndCmdCompletionInGo(t *testing.T) {
 	}
 }
 
+func TestShorthandFlagCompletionInGoWithDesc(t *testing.T) {
+	rootCmd := &Command{
+		Use: "root",
+		Run: emptyRun,
+	}
+
+	rootCmd.Flags().StringP("first", "f", "", "first flag")
+	rootCmd.Flags().StringP("second", "d", "", "second flag")
+
+	// Test that flag names are completed
+	output, err := executeCommand(rootCmd, ShellCompRequestCmd, "-ftest")
+	if err != nil {
+		t.Errorf("Unexpected error: %v", err)
+	}
+
+	expected := strings.Join([]string{
+		"-f\tfirst flag",
+		":4",
+		"Completion ended with directive: ShellCompDirectiveNoFileComp", ""}, "\n")
+
+	if output != expected {
+		t.Errorf("expected: %q, got: %q", expected, output)
+	}
+
+}
+
 func TestFlagNameCompletionInGo(t *testing.T) {
 	rootCmd := &Command{
 		Use: "root",