Improved project structure

src/cli/Main.go

@@ -0,0 +1,21 @@
+package cli
+
+// Main is the entry point for the CLI frontend.
+// It returns the exit code of the compiler.
+// We never call os.Exit directly here because it's bad for testing.
+func Main(args []string) int {
+	if len(args) == 0 {
+		return Help(nil)
+	}
+
+	switch args[0] {
+	case "build":
+		return Build(args[1:])
+
+	case "system":
+		return System(args[1:])
+
+	default:
+		return Help(args[1:])
+	}
+}