Fix bug in which "fooasdf -o=foo" is incorrectly identified as the subcommand "foo"

cli.go

@@ -680,12 +680,12 @@ func (c *CLI) processArgs() {
 				}
 
 				// Determine the argument we look to to end subcommands.
-				// We look at all arguments until one has a space. This
-				// disallows commands like: ./cli foo "bar baz". An argument
-				// with a space is always an argument.
+				// We look at all arguments until one is a flag or has a space.
+				// This disallows commands like: ./cli foo "bar baz". An
+				// argument with a space is always an argument.
 				j := 0
 				for k, v := range c.Args[i:] {
-					if strings.ContainsRune(v, ' ') {
+					if strings.ContainsRune(v, ' ') || v[0] == '-' {
 						break
 					}
 

cli_test.go

@@ -171,6 +171,37 @@ func TestCLIRun_prefix(t *testing.T) {
 	}
 }
 
+func TestCLIRun_subcommandSuffix(t *testing.T) {
+	buf := new(bytes.Buffer)
+	command := new(MockCommand)
+	cli := &CLI{
+		Args: []string{"fooasdf", "-o=foo"},
+		Commands: map[string]CommandFactory{
+			"foo": func() (Command, error) {
+				return command, nil
+			},
+
+			"foo bar": func() (Command, error) {
+				return command, nil
+			},
+		},
+		ErrorWriter: buf,
+	}
+
+	exitCode, err := cli.Run()
+	if err != nil {
+		t.Fatalf("err: %s", err)
+	}
+
+	if exitCode != 127 {
+		t.Fatalf("expected to get exit code 127, but got %d", exitCode)
+	}
+
+	if command.RunCalled {
+		t.Fatalf("run should not be called")
+	}
+}
+
 func TestCLIRun_default(t *testing.T) {
 	commandBar := new(MockCommand)
 	commandBar.RunResult = 42