frontend: add stub disassemble command

frontend/cmd/cmd.h

@@ -4,6 +4,7 @@
 enum command_id {
 	CMD_ROOT,
 	CMD_ASSEMBLE,
+	CMD_DISASSEMBLE,
 	CMD_COMPILE,
 	CMD_REPL,
 	CMD_INTERNAL,

frontend/cmd/disassemble.c

@@ -0,0 +1,48 @@
+#include "../debug.h"
+#include "cmd.h"
+
+#include <blue/cmd.h>
+#include <blue/term.h>
+#include <blue/object/string.h>
+#include <errno.h>
+#include <ivy/file.h>
+#include <ivy/asm/lex.h>
+#include <ivy/asm/parse.h>
+#include <ivy/asm/assembler.h>
+#include <stdio.h>
+
+enum {
+	ARG_BIN_FILE,
+};
+
+static int disassemble(const b_command *cmd, const b_arglist *args, const b_array *_)
+{
+	const char *in_path = NULL;
+
+	b_arglist_get_string(args, B_COMMAND_INVALID_ID, ARG_BIN_FILE, 0, &in_path);
+	if (!in_path) {
+		b_err("no input file specified.");
+		return -1;
+	}
+	
+	return 0;
+}
+
+B_COMMAND(CMD_DISASSEMBLE, CMD_ROOT)
+{
+	B_COMMAND_NAME("disassemble");
+	B_COMMAND_SHORT_NAME('D');
+	B_COMMAND_DESC(
+		"disassemble an Ivy object file.");
+	B_COMMAND_FLAGS(B_COMMAND_SHOW_HELP_BY_DEFAULT);
+	B_COMMAND_FUNCTION(disassemble);
+
+	B_COMMAND_ARG(ARG_BIN_FILE)
+	{
+		B_ARG_NAME("input file");
+		B_ARG_DESC("the Ivy object file to disassemble.");
+		B_ARG_NR_VALUES(1);
+	}
+
+	B_COMMAND_HELP_OPTION();
+}