improve prg2bin, use node_modules

package.json

@@ -0,0 +1,26 @@
+{
+  "name": "apple1-videocard-lib",
+  "version": "1.0.0",
+  "description": "Library and demos for the \"Apple-1 Graphic Card\" by P-LAB, \r featuring the TMS9918 Video Display Processor by Texas Instruments.",
+  "main": "index.js",
+  "directories": {
+    "doc": "docs",
+    "lib": "lib"
+  },
+  "scripts": {
+    "test": "echo \"Error: no test specified\" && exit 1"
+  },
+  "repository": {
+    "type": "git",
+    "url": "git+https://github.com/nippur72/apple1-videocard-lib.git"
+  },
+  "author": "Antonino Porcino <nino.porcino@gmail.com>",
+  "license": "MIT",
+  "bugs": {
+    "url": "https://github.com/nippur72/apple1-videocard-lib/issues"
+  },
+  "homepage": "https://github.com/nippur72/apple1-videocard-lib#readme",
+  "dependencies": {
+    "command-line-args": "^5.2.0"
+  }
+}

tools/parseOptions.js

@@ -0,0 +1,12 @@
+const commandLineArgs = require('command-line-args');
+
+function parseOptions(optionDefinitions) {
+    try {
+       return commandLineArgs(optionDefinitions);
+    } catch(ex) {
+       console.log(ex.message);
+       process.exit(-1);
+    }
+ }
+
+ module.exports = parseOptions;

tools/prg2bin.js

@@ -1,9 +1,21 @@
 const fs = require('fs');
+const parseOptions = require("./parseOptions");
 
-let prg = fs.readFileSync("test_apple1.prg");
+const options = parseOptions([
+   { name: 'input', alias: 'i', type: String },
+   { name: 'output', alias: 'o', type: String }
+]);
+
+if(options.input === undefined || options.output === undefined) {
+   console.log("usage: prg2bin -i inputfile.prg -o outputfile.bin");
+   process.exit(-1);
+}
+
+let prg = fs.readFileSync(options.input);
 
 prg = prg.slice(2);
 
-fs.writeFileSync("test_apple1.bin",prg);
+fs.writeFileSync(options.output,prg);
+
+console.log(`${options.output} written`);
 
-console.log("bin written");