mirb should take filename and arguments.

mrbgems/mruby-bin-mirb/tools/mirb/mirb.c

@@ -194,6 +194,7 @@ is_code_block_open(struct mrb_parser_state *parser)
 }
 
 struct _args {
+  FILE *rfp;
   mrb_bool verbose      : 1;
   int argc;
   char** argv;
@@ -251,12 +252,30 @@ parse_args(mrb_state *mrb, int argc, char **argv, struct _args *args)
       return EXIT_FAILURE;
     }
   }
+
+  if (args->rfp == NULL) {
+    if (*argv != NULL) {
+      args->rfp = fopen(argv[0], "r");
+      if (args->rfp == NULL) {
+        printf("Cannot open program file. (%s)\n", *argv);
+        return EXIT_FAILURE;
+      }
+      argc--; argv++;
+    }
+  }
+  args->argv = (char **)mrb_realloc(mrb, args->argv, sizeof(char*) * (argc + 1));
+  memcpy(args->argv, argv, (argc+1) * sizeof(char*));
+  args->argc = argc;
+
   return EXIT_SUCCESS;
 }
 
 static void
 cleanup(mrb_state *mrb, struct _args *args)
 {
+  if (args->rfp)
+    fclose(args->rfp);
+  mrb_free(mrb, args->argv);
   mrb_close(mrb);
 }
 
@@ -323,7 +342,9 @@ main(int argc, char **argv)
   mrb_state *mrb;
   mrb_value result;
   struct _args args;
+  mrb_value ARGV;
   int n;
+  int i;
   mrb_bool code_block_open = FALSE;
   int ai;
   unsigned int stack_keep = 0;
@@ -334,7 +355,6 @@ main(int argc, char **argv)
     fputs("Invalid mrb interpreter, exiting mirb\n", stderr);
     return EXIT_FAILURE;
   }
-  mrb_define_global_const(mrb, "ARGV", mrb_ary_new_capa(mrb, 0));
 
   n = parse_args(mrb, argc, argv, &args);
   if (n == EXIT_FAILURE) {
@@ -343,6 +363,16 @@ main(int argc, char **argv)
     return n;
   }
 
+  ARGV = mrb_ary_new_capa(mrb, args.argc);
+  for (i = 0; i < args.argc; i++) {
+    char* utf8 = mrb_utf8_from_locale(args.argv[i], -1);
+    if (utf8) {
+      mrb_ary_push(mrb, ARGV, mrb_str_new_cstr(mrb, utf8));
+      mrb_utf8_free(utf8);
+    }
+  }
+  mrb_define_global_const(mrb, "ARGV", ARGV);
+
 #ifdef ENABLE_READLINE
   history_path = get_history_path(mrb);
   if (history_path == NULL) {
@@ -366,8 +396,17 @@ main(int argc, char **argv)
   ai = mrb_gc_arena_save(mrb);
 
   while (TRUE) {
+#ifdef ENABLE_READLINE
+    char* line;
+#endif
     char *utf8;
 
+    if (args.rfp) {
+      if (fgets(last_code_line, sizeof(last_code_line)-1, args.rfp) != NULL)
+        goto done;
+      break;
+    }
+
 #ifndef ENABLE_READLINE
     print_cmdline(code_block_open);
 
@@ -388,7 +427,7 @@ main(int argc, char **argv)
     last_code_line[char_index++] = '\n';
     last_code_line[char_index] = '\0';
 #else
-    char* line = MIRB_READLINE(code_block_open ? "* " : "> ");
+    line = MIRB_READLINE(code_block_open ? "* " : "> ");
     if (line == NULL) {
       printf("\n");
       break;
@@ -403,6 +442,8 @@ main(int argc, char **argv)
     free(line);
 #endif
 
+done:
+
     if (code_block_open) {
       if (strlen(ruby_code)+strlen(last_code_line) > sizeof(ruby_code)-1) {
         fputs("concatenated input string too long\n", stderr);