add cwd command line arg

README.md

@@ -2,6 +2,6 @@ Thank you for using Prosperon!
 
 Provided are prosperon builds for all available platforms. Simply run prosperon for your platform in a game folder to play!
 
-To get started, take a dive into the provided example games in the examples folder. Just copy the prosperon executable for your platform, into any provided example folder, then run it!
+To get started, take a dive into the provided example games in the examples folder. You can either copy the prosperon executable into an example directory and run it there, or run `prosperon path/to/example` from the project root.
 
 You can take a look through the docs folder for the prosperon manual to learn all about it. The manual is available on the web at [docs.prosperon.dev](https://docs.prosperon.dev).

scripts/modules/cmd.js

@@ -163,6 +163,9 @@ Cmdline.register_order(
   "spawn",
   function(argv) {
     prosperon.args = parse_args(argv)
+    if (!prosperon.args.cwd) prosperon.args.cwd = '.'
+    io.mount(prosperon.args.cwd)
+      
     if (!prosperon.args.program)
       os.exit()
   },
@@ -214,8 +217,19 @@ function cmd_args(cmds) {
     cmds.unshift("--program");
     cmds.unshift("spawn");
   } else if (!Cmdline.orders[cmds[0]]) {
-    // If the first token isn't a recognized command, treat it as a script
-    cmds.unshift("--program");
+    // If the first token isn't a recognized command, treat it as either
+    // a directory containing main.js, or a script to run directly.
+    var arg0 = cmds.shift();
+    if (io.is_directory(arg0)) {
+      var script = cmds[0] ? cmds.shift() : "main.js";
+      cmds.unshift(script);
+      cmds.unshift("--program");
+      cmds.unshift(arg0);
+      cmds.unshift("--cwd");
+    } else {
+      cmds.unshift(arg0);
+      cmds.unshift("--program");
+    }
     cmds.unshift("spawn");
   }