add VERSION & option

Makefile.build

@@ -29,5 +29,7 @@ CFILES_UTILITIES =	src/utilities/utils.c
 
 CFILES_LIB 			=	src/lib/print.c
 
-SOURCES = $(CFILES_FILESYS) $(CFILES_LOADER) $(CFILES_LEXER) $(CFILES_PARSER) $(CFILES_SERVER) $(CFILES_VISITOR) $(CFILES_DEVELOP) $(CFILES_UTILITIES) $(CFILES_LIB)
+CFILES_VERSION	=	VERSION
+
+SOURCES = $(CFILES_FILESYS) $(CFILES_LOADER) $(CFILES_LEXER) $(CFILES_PARSER) $(CFILES_SERVER) $(CFILES_VISITOR) $(CFILES_DEVELOP) $(CFILES_UTILITIES) $(CFILES_LIB) $(CFILES_VERSION)
 

VERSION

@@ -0,0 +1 @@
+0.0.1

src/loader/main.c

@@ -13,16 +13,29 @@
 #include <signal.h>
 #include <string.h>
 #include <netdb.h>
+#include <getopt.h>
 
 #ifdef DEVELOP_MODE
 #include "develop/develop_mode.h"
 #endif
 
 #define MAX_RETRY 5
 #define START_PORT 8080
+#define MAX_VERSION_LENGTH 20
 
 int ORORA_PORT;
 
+extern char* get_version();
+void print_version();
+
+void print_usage(const char* program_name)
+{
+  printf("Usage: %s [OPTION] [FILE]\n", program_name);
+  printf("Options:\n");
+  printf("  -v, --version     Display version information\n");
+  printf("  -h, --help        Display this help message\n");
+}
+
 int create_and_bind_socket(int *port)
 {
   int server_socket, opt = 1;
@@ -104,8 +117,40 @@ int main(int argc, char** argv)
   Envs* root_envs = init_envs(global_env, init_env());
 #endif
 
+  int opt;
+  static struct option long_options[] = {
+      {"version", no_argument, 0, 'v'},
+      {"help", no_argument, 0, 'h'},
+      {0, 0, 0, 0}
+  };
+
+  while ((opt = getopt_long(argc, argv, "vh", long_options, NULL)) != -1)
+  {
+    switch (opt)
+    {
+      case 'v':
+        print_version();
+        return 0;
+      case 'h':
+        print_usage(argv[0]);
+        return 0;
+      default:
+        print_usage(argv[0]);
+        return 1;
+    }
+  }
+
+  if (!init_orora())
+      return 1;
+
   if (argc == 2)
   {
+#ifndef GLOBAL_ENV_DEFINE
+#define GLOBAL_ENV_DEFINE
+    Envs* global_env = init_envs((void*) 0, init_env());
+    Envs* root_envs = init_envs(global_env, init_env());
+#endif
+
     File* file = file_open(argv[1]);
 
 #ifdef DEVELOP_MODE
@@ -258,3 +303,37 @@ bool init_orora()
 
   return true;
 }
+
+void print_version() {
+    printf("%sOrora Programming Language%s version %s\n", ORORA_COLOR_H, ORORA_COLOR_RESET, get_version());
+    printf("(C) 2023 Orora Project\n");
+}
+
+char* get_version()
+{
+  static char version[MAX_VERSION_LENGTH] = {0};
+
+  if (version[0] == '\0')
+  {
+    FILE* version_file = fopen("VERSION", "r");
+    if (version_file == (void*) 0)
+    {
+      fprintf(stderr, "Error: Could not open VERSION file\n");
+      return "Unknown";
+    }
+
+    if (fgets(version, MAX_VERSION_LENGTH, version_file) == (void*) 0)
+    {
+      fprintf(stderr, "Error: Could not read VERSION file\n");
+      fclose(version_file);
+      return "Unknown";
+    }
+
+    fclose(version_file);
+
+    char* newline = strchr(version, '\n');
+    if (newline) *newline = '\0';
+  }
+
+  return version;
+}