argh/parser2.go

@@ -55,6 +55,8 @@ func (p *parser2) parseArgs() (*ParseTree, error) {
 	tracef("parseArgs() parsing %q as program command; cfg=%+#v", p.lit, p.cfg.Prog)
 	prog := p.parseCommand(&p.cfg.Prog)
 
+	tracef("parseArgs() top level node is %T", prog)
+
 	nodes := []Node{prog}
 	if v := p.parsePassthrough(); v != nil {
 		tracef("parseArgs() appending passthrough argument %v", v)

argh/querier.go

@@ -1,7 +1,7 @@
 package argh
 
 type Querier interface {
-	Program() (Command, bool)
+	Program() (*Command, bool)
 	AST() []Node
 }
 
@@ -13,12 +13,19 @@ type defaultQuerier struct {
 	nodes []Node
 }
 
-func (dq *defaultQuerier) Program() (Command, bool) {
+func (dq *defaultQuerier) Program() (*Command, bool) {
 	if len(dq.nodes) == 0 {
-		return Command{}, false
+		tracef("Program nodes are empty")
+		return nil, false
+	}
+
+	tracef("Program node[0] is %T", dq.nodes[0])
+
+	v, ok := dq.nodes[0].(*Command)
+	if ok && v.Name == "" {
+		return v, false
 	}
 
-	v, ok := dq.nodes[0].(Command)
 	return v, ok
 }
 

argh/querier_test.go

@@ -12,41 +12,34 @@ func TestQuerier_Program(t *testing.T) {
 		name  string
 		args  []string
 		cfg   *argh.ParserConfig
-		exp   argh.Command
+		exp   string
 		expOK bool
 	}{
 		{
 			name:  "typical",
 			args:  []string{"pizzas", "ahoy", "--treatsa", "fun"},
-			exp:   argh.Command{Name: "pizzas"},
+			exp:   "pizzas",
 			expOK: true,
 		},
 		{
 			name:  "minimal",
 			args:  []string{"pizzas"},
-			exp:   argh.Command{Name: "pizzas"},
+			exp:   "pizzas",
 			expOK: true,
 		},
 		{
 			name:  "invalid",
 			args:  []string{},
-			exp:   argh.Command{},
-			expOK: false,
-		},
-		{
-			name:  "invalid flag only",
-			args:  []string{"--oh-no"},
-			exp:   argh.Command{},
 			expOK: false,
 		},
 	} {
 		t.Run(tc.name, func(ct *testing.T) {
-			pt, err := argh.ParseArgs(tc.args, tc.cfg)
+			pt, err := argh.ParseArgs2(tc.args, tc.cfg)
 			require.Nil(ct, err)
 
 			prog, ok := argh.NewQuerier(pt.Nodes).Program()
-			require.Equal(ct, tc.exp, prog)
 			require.Equal(ct, tc.expOK, ok)
+			require.Equal(ct, tc.exp, prog.Name)
 		})
 	}
 }