Compiler now takes in a format override parameter

cmd/fsplc/compiler.go

@@ -15,6 +15,7 @@ import "git.tebibyte.media/sashakoshka/fspl/generator/native"
 type Compiler struct {
 	Output       string
 	Optimization string
+	Format       string
 }
 
 func (this *Compiler) Compile (inputs []string) error {
@@ -39,14 +40,23 @@ func (this *Compiler) Compile (inputs []string) error {
 		return errors.New(fmt.Sprintf("internal errror: %v", err))
 	}
 
+	// if the format isn't specified, try to get it from the filename
+	// extension of the input. if that isn't specified, default to .o
+	if this.Format == "" {
+		this.Format = filepath.Ext(this.Output)
+	}
+	if this.Format == "" {
+		this.Format = ".o"
+	}
+
 	if this.Output == "" {
 		this.Output = strings.TrimSuffix (
 			inputs[0],
-			filepath.Ext(inputs[0])) + ".o"
+			filepath.Ext(inputs[0])) + this.Format
 	}
-	
-	extension := filepath.Ext(this.Output)
-	switch extension {
+
+	// do something based on the output extension
+	switch this.Format {
 	case ".s":
 		return this.CompileModule(module, "asm")
 	case ".o":
@@ -63,7 +73,7 @@ func (this *Compiler) Compile (inputs []string) error {
 			"could not determine output type"))
 	default:
 		return errors.New(fmt.Sprintf (
-			"unknown output type %s", extension))
+			"unknown output type %s", this.Format))
 	}
 }
 

cmd/fsplc/main.go

@@ -9,6 +9,10 @@ func main () {
 	help := cli.NewFlag (
 		'h', "help",
 		"Display usage information and exit")
+	format := cli.NewInputFlag (
+		'm', "format",
+		"Output format (.s, .o, .ll)", "",
+		cli.NewValSet(".s", ".o", ".ll"))
 	output := cli.NewInputFlag (
 		'o', "output",
 		"Output filename", "",
@@ -18,7 +22,13 @@ func main () {
 		"Optimization level (0-3)", "0",
 		cli.NewValSet("0", "1", "2", "3"))
 
-	application := cli.New("Compile FSPL source files", help, output, optimization)
+	application := cli.New (
+		"Compile FSPL source files",
+		help,
+		format,
+		output,
+		optimization)
+	
 	application.Syntax = "[OPTION]... [FILE]..."
 	application.ParseOrExit(os.Args)
 	if help.Value != "" {
@@ -29,6 +39,7 @@ func main () {
 	compiler := new(Compiler)
 	compiler.Output       = output.Value
 	compiler.Optimization = optimization.Value
+	compiler.Format       = format.Value
 
 	err := compiler.Compile(application.Args)
 	if err != nil {