command fixes:

- positional tests
- init on check syntax
- close input files

cmd/treerack/check.go

@@ -37,6 +37,8 @@ func check(args []string) int {
 		return code
 	}
 
+	defer input.Close()
+
 	_, err := s.Parse(input)
 	if err != nil {
 		stderr(err)

cmd/treerack/check_test.go

@@ -189,6 +189,13 @@ var checkTests = []mainTest{
 		},
 	},
 
+	{
+		title: "input as positional",
+		args: []string{
+			"treerack", "check", "-syntax-string", `foo = "bar"`, "bar_test.txt",
+		},
+	},
+
 	{
 		title: "input as string",
 		args: []string{

cmd/treerack/checksyntax.go

@@ -22,6 +22,15 @@ func checkSyntax(args []string) int {
 	}
 
 	o.syntax.positional = o.command.flagSet.Args()
-	_, code := o.syntax.openSyntax()
+	s, code := o.syntax.openSyntax()
+	if code != 0 {
 		return code
+	}
+
+	if err := s.Init(); err != nil {
+		stderr(err)
+		return -1
+	}
+
+	return 0
 }

cmd/treerack/checksyntax_test.go

@@ -111,6 +111,13 @@ var checkSyntaxTests = []mainTest{
 		},
 	},
 
+	{
+		title: "syntax as positional",
+		args: []string{
+			"treerack", "check-syntax", "foo_test.treerack",
+		},
+	},
+
 	{
 		title: "syntax as string",
 		args: []string{
@@ -125,6 +132,17 @@ var checkSyntaxTests = []mainTest{
 		},
 		stdin: "invalid",
 	},
+
+	{
+		title: "invalid syntax semantics",
+		args: []string{
+			"treerack", "check-syntax", "-syntax-string", `foo:alias = "bar"`,
+		},
+		exit: -1,
+		stderr: []string{
+			"root",
+		},
+	},
 }
 
 func TestCheckSyntax(t *testing.T) {

cmd/treerack/generate_test.go

@@ -37,6 +37,17 @@ var generateTests = []mainTest{
 		},
 	},
 
+	{
+		title: "syntax as positional",
+		args: []string{
+			"treerack", "generate", "-export", "-package-name", "foo", "foo_test.treerack",
+		},
+		stdout: []string{
+			"package foo",
+			"func Parse",
+		},
+	},
+
 	{
 		title: "syntax as string",
 		args: []string{

cmd/treerack/open.go

@@ -113,6 +113,8 @@ func (o *fileOptions) openSyntax() (*treerack.Syntax, int) {
 		return nil, code
 	}
 
+	defer input.Close()
+
 	s := &treerack.Syntax{}
 	if err := s.ReadSyntax(input); err != nil {
 		stderr(err)

cmd/treerack/parse.go

@@ -74,6 +74,8 @@ func parse(args []string) int {
 		return code
 	}
 
+	defer input.Close()
+
 	n, err := s.Parse(input)
 	if err != nil {
 		stderr(err)

cmd/treerack/parse_test.go

@@ -46,6 +46,16 @@ var parseTests = []mainTest{
 		},
 	},
 
+	{
+		title: "input as positional",
+		args: []string{
+			"treerack", "parse", "-syntax-string", `foo = "bar"`, "bar_test.txt",
+		},
+		stdout: []string{
+			`"name":"foo"`,
+		},
+	},
+
 	{
 		title: "input as string",
 		args: []string{