Updated for modern building.

.gitignore

@@ -1,4 +1,7 @@
 node_modules
 img/*.asm
 builder/bin
-build
+build
+.DS_Store
+obj
+bin

.vscode/tasks.json

@@ -0,0 +1,32 @@
+{
+  // See https://go.microsoft.com/fwlink/?LinkId=733558
+  // for the documentation about the tasks.json format
+  "version": "2.0.0",
+  "tasks": [
+    {
+      "label": "build",
+      "type": "shell",
+      "command": "make",
+      "group": {
+        "kind": "build",
+        "isDefault": true
+      },
+      "presentation": {
+        "panel": "new"
+      },
+      "problemMatcher": ["$rgbdserror", "$rgbdslinkerror"]
+    },
+    {
+      "label": "clean",
+      "type": "shell",
+      "command": "make",
+      "args": [
+        "clean"
+      ],
+      "group": "build",
+      "presentation": {
+        "panel": "new"
+      }
+    }
+  ]
+}

README.md

@@ -6,10 +6,8 @@ A version of Snake programmed for the Game Boy. Binary download and browser-play
 
 I built this project on macOS. The instructions should be pretty easy to follow from most UNIX-y operating systems. Windows users may have some troubles with the build scripts.
 
-The build pipeline has a dependency on [node.js](http://nodejs.org). You'll need to install it.
+The build pipeline has a dependency on [node.js](http://nodejs.org). You'll need to install it. You'll also need to install [RGBDS](https://rgbds.gbdev.io).
 
 `cd` into `builder/` and run `npm install`.
 
-Also in `builder/`, create a folder called `bin` and copy RGBDS' `asm`, `lib`, `link`, and `rgbfix` executables (with those names) into it.
-
-`cd` back to the project root directory. Run `node build`. The output will be in `build/bin/`. Also note that the build process will generate `asm` files in `img/`. You can look at, but not modify, those files (they're rewritten every time you build).
+`cd` back to the project root directory. Run `make`. The output will be in `bin/`. Also note that the build process will generate `asm` files in `img/`. You can look at, but not modify, those files (they're rewritten every time you build).

builder/gfx.js

@@ -3,22 +3,10 @@
 var fs = require("fs");
 var path = require("path");
 var PNG = require("pngjs").PNG;
+const program = require("commander").program;
 
 var images = {};
 
-module.exports = function(imageDirectory, done) {
-  var sourceDirectory = path.resolve(imageDirectory, "src");
-  var fileNames = fs.readdirSync(sourceDirectory);
-  for(var i=0; i<fileNames.length; i++) {
-    var fileName = fileNames[i];
-    if(path.extname(fileName) == ".json") {
-      var filePath = path.resolve(sourceDirectory, fileName);
-      processSet(imageDirectory, filePath);
-    }
-  }
-  done();
-}
-
 function getImage(dirPath, imageName) {
   if(images[imageName] == null) {
     var imagePath = path.resolve(dirPath, imageName);
@@ -132,7 +120,7 @@ function outputAssembly(name, indices, bytes, path) {
     output += "\n";
   }
 
-  output += "SECTION \"" + name + " tiles\", HOME\n";
+  output += "SECTION \"" + name + " tiles\", ROM0\n";
   output += name + "Tiles:\n";
   for(var i=0; i<bytes.length; i++) {
     if(i % 16 == 0) {
@@ -156,3 +144,14 @@ function outputAssembly(name, indices, bytes, path) {
 
   fs.writeFileSync(path, output);
 }
+
+program
+  .version("1.0.0")
+  .arguments("<src> <dst>")
+  .action((src, dst) => {
+    let jsonFilePath = src.substring(0, src.length - path.extname(src).length) + ".json";
+    console.log(`convert ${src} to ${dst}, ${jsonFilePath}`);
+    processSet(path.dirname(dst), jsonFilePath);
+  });
+
+  program.parse(process.argv);

builder/package.json

@@ -1,8 +1,8 @@
 {
-  "name" : "gbbuilder",
+  "name": "gbbuilder",
   "version": "1.0.0",
-  "dependencies" : {
-    "os-homedir" : "1.0.1",
-    "pngjs" : "~2.3.1"
+  "dependencies": {
+    "pngjs": "~6.0.0",
+    "commander": "~7.1.0"
   }
-}
+}

field.asm

@@ -6,7 +6,7 @@ INCLUDE "inc/rand.asm"
 INCLUDE "inc/debug.asm"
 INCLUDE "inc/save.asm"
 
-SECTION "Field Module Variables", BSS
+SECTION "Field Module Variables", WRAM0
 FIELD_MODULE_SNAKE_SLOT_COUNT EQU 18*14
 FIELD_MODULE_SNAKE_TICK_TIME EQU 16
 FIELD_MODULE_FOOD_PER_TICK_INCREASE EQU 15
@@ -23,51 +23,51 @@ FIELD_MODULE_FONT_DATA_OFFSET EQU 40
 FIELD_MODULE_HEART_SPAWN_COUNT EQU 10
 FIELD_MODULE_HEART_DURATION_SECONDS EQU 9
 
-fieldModuleTickTime DS 1
-fieldModuleFoodUntilTickTimeIncrease DS 1
+fieldModuleTickTime: DS 1
+fieldModuleFoodUntilTickTimeIncrease: DS 1
 
-fieldModuleHeartSpawnCountdown DS 1
-fieldModuleFoodIsHeart DS 1
+fieldModuleHeartSpawnCountdown: DS 1
+fieldModuleFoodIsHeart: DS 1
 
-fieldModuleSnakeLength DS 1
-fieldModuleSnakeSlots DS FIELD_MODULE_SNAKE_SLOT_COUNT * 2
-fieldModuleSnakeSlotHead DS 1
-fieldModuleSnakeSlotTail DS 1
-fieldModuleSnakeTickTime DS 1
-fieldModuleSnakeNextDirection DS 1
-fieldModuleSnakePreviousDirection DS 1
-fieldModuleOccupiedFlags DS FIELD_MODULE_SNAKE_SLOT_COUNT
+fieldModuleSnakeLength: DS 1
+fieldModuleSnakeSlots: DS FIELD_MODULE_SNAKE_SLOT_COUNT * 2
+fieldModuleSnakeSlotHead: DS 1
+fieldModuleSnakeSlotTail: DS 1
+fieldModuleSnakeTickTime: DS 1
+fieldModuleSnakeNextDirection: DS 1
+fieldModuleSnakePreviousDirection: DS 1
+fieldModuleOccupiedFlags: DS FIELD_MODULE_SNAKE_SLOT_COUNT
 
-fieldModuleShouldWriteSnakeHead DS 1
-fieldModuleShouldWriteSnakeHeadX DS 1
-fieldModuleShouldWriteSnakeHeadY DS 1
+fieldModuleShouldWriteSnakeHead: DS 1
+fieldModuleShouldWriteSnakeHeadX: DS 1
+fieldModuleShouldWriteSnakeHeadY: DS 1
 
-fieldModuleShouldWriteSnakeTail DS 1
-fieldModuleShouldWriteSnakeTailX DS 1
-fieldModuleShouldWriteSnakeTailY DS 1
-fieldModuleShouldWriteSnakeTailValue DS 1
+fieldModuleShouldWriteSnakeTail: DS 1
+fieldModuleShouldWriteSnakeTailX: DS 1
+fieldModuleShouldWriteSnakeTailY: DS 1
+fieldModuleShouldWriteSnakeTailValue: DS 1
 
-fieldModuleHeadCoordinateBufferX DS 1
-fieldModuleHeadCoordinateBufferY DS 1
-fieldModuleNextDirectionBuffer DS 1
+fieldModuleHeadCoordinateBufferX: DS 1
+fieldModuleHeadCoordinateBufferY: DS 1
+fieldModuleNextDirectionBuffer: DS 1
 
-fieldModuleHeartAgeSeconds DS 1
-fieldModuleHeartAgeTicks DS 1
+fieldModuleHeartAgeSeconds: DS 1
+fieldModuleHeartAgeTicks: DS 1
 
-fieldModuleFoodX DS 1
-fieldModuleFoodY DS 1
-fieldModuleDidHideFood DS 1
-fieldModuleFoodBufferX DS 1
-fieldModuleFoodBufferY DS 1
-fieldModuleFoodTile DS 1
-fieldModuleShouldWriteFoodOAM DS 1
+fieldModuleFoodX: DS 1
+fieldModuleFoodY: DS 1
+fieldModuleDidHideFood: DS 1
+fieldModuleFoodBufferX: DS 1
+fieldModuleFoodBufferY: DS 1
+fieldModuleFoodTile: DS 1
+fieldModuleShouldWriteFoodOAM: DS 1
 
-fieldModuleReleasedPause DS 1
+fieldModuleReleasedPause: DS 1
 
-fieldModuleScore DS 2
-fieldModuleShouldRenderScore DS 1
+fieldModuleScore: DS 2
+fieldModuleShouldRenderScore: DS 1
 
-SECTION "Field Module", HOME
+SECTION "Field Module", ROM0
 fieldModuleScoreText:
   db "SCORE",0
 fieldModuleHighScoreText: