Add the --no-encrypt command-line option

src/fileio.c

@@ -329,7 +329,8 @@ bool save_game (int num)
 	err_exit_nomem();
     }
 
-    crypt_key = game_file_crypt_key[randi(GAME_FILE_CRYPT_KEY_SIZE)];
+    crypt_key = option_no_encrypt ? 0 :
+	game_file_crypt_key[randi(GAME_FILE_CRYPT_KEY_SIZE)];
 
     // Create the data directory, if needed
     data_dir = data_directory();

src/globals.c

@@ -86,6 +86,7 @@ bool	quit_selected	= false;	// Is a player trying to quit the game?
 bool	abort_game	= false;	// Abort game without declaring winner?
 
 bool	option_no_color   = false;	// True if --no-color was specified
+bool	option_no_encrypt = false;	// True if --no-encrypt was specified
 int	option_max_turn   = 0;		// Max. turns if --max-turn was specified
 
 

src/globals.h

@@ -198,6 +198,7 @@ extern bool	quit_selected;		// Is a player trying to quit the game?
 extern bool	abort_game;		// Abort game without declaring winner?
 
 extern bool	option_no_color;	// True if --no-color was specified
+extern bool	option_no_encrypt;	// True if --no-encrypt was specified
 extern int	option_max_turn;	// Max. turns if --max-turn was specified
 
 

src/trader.c

@@ -43,6 +43,7 @@
 
 enum options_char {
     OPTION_NO_COLOR = 1,
+    OPTION_NO_ENCRYPT,
     OPTION_MAX_TURN
 };
 
@@ -55,6 +56,7 @@ static struct option const options_long[] = {
     { "version",    no_argument,       NULL, 'V' },
     { "no-color",   no_argument,       NULL, OPTION_NO_COLOR },
     { "no-colour",  no_argument,       NULL, OPTION_NO_COLOR },
+    { "no-encrypt", no_argument,       NULL, OPTION_NO_ENCRYPT },
     { "max-turn",   required_argument, NULL, OPTION_MAX_TURN },
     { NULL,         0,                 NULL, 0 }
 };
@@ -215,6 +217,11 @@ void process_cmdline (int argc, char *argv[])
 	    option_no_color = true;
 	    break;
 
+	case OPTION_NO_ENCRYPT:
+	    // --no-encrypt: don't encrypt game files
+	    option_no_encrypt = true;
+	    break;
+
 	case OPTION_MAX_TURN:
 	    // --max-turn: specify the maximum turn number
 	    option_max_turn = strtol(optarg, &p, 10);