feat: add support to define the parser version

It's pretty loose, and works mostly around IF/ELSE logic. Tokens in 208 parse in 207 (probably a bug on my side)

cli/index.mjs

@@ -2,7 +2,7 @@ import { readFileSync, writeFileSync, statSync } from 'fs';
 import { dirname, resolve, basename, extname } from 'path';
 import * as cli from '../index.mjs';
 import pkg from '../package.json' with { type: 'json' };
-import { LATEST } from '../parser-version.mjs';
+import { LATEST, setParser, valid } from '../parser-version.mjs';
 
 const { version } = pkg;
 
@@ -27,7 +27,7 @@ async function main(type) {
     L: 'inline-load',
     A: 'autostart',
     C: 'comments-off',
-    P: 'parser', // currently not exposed
+    P: 'parser',
   };
   const bools = [
     'bank',
@@ -60,6 +60,18 @@ async function main(type) {
     return help(type);
   }
 
+  if (options.parser) {
+    options.parser = options.parser.toUpperCase();
+    if (!valid.includes(options.parser)) {
+      console.error(`Unknown parser: ${options.parser} - valid options: ${valid.join(', ')}`);
+      process.exit(1);
+    }
+  } else {
+    options.parser = LATEST;
+  }
+
+  setParser(options.parser);
+
   if (options.input) {
     // check the file actually exists
     try {
@@ -173,7 +185,7 @@ async function main(type) {
             : undefined,
           inlineLoad: options['inline-load'],
           stripComments: options['comments-off'],
-          parser: LATEST,
+          parser: options.parser,
           bankOutputDir: cwd,
         });
       }

index.mjs

@@ -149,6 +149,7 @@ export const tokens = (
  * @param {boolean} [options.validate=false]
  * @param {boolean} [options.defines=false]
  * @param {boolean} [options.bankOutputDir=process.cwd()] directory to save banks to, if this is empty or false, it doesn't write banks when split
+ * @param {string} [options.parser] parser version to use
  * @returns {Uint8Array}
  */
 export const file2bas = (src, options = {}) => {
@@ -164,6 +165,10 @@ export const file2bas = (src, options = {}) => {
     ...parseOptions
   } = options;
 
+  if (parseOptions.parser) {
+    parser.setParser(parseOptions.parser);
+  }
+
   const bank = parseOptions.bank;
 
   let { filename = 'untitled', autostart = 0x8000 } = options;

package.json

@@ -30,7 +30,7 @@
     "build": "rm -rf dist; rollup --config && chmod 744 dist/cli/*.js",
     "dev": "npm run build; rollup --config --watch",
     "prepare": "npm run build",
-    "test:dev": "ava __tests__/*.test.js --no-coverage-report --watch",
+    "test:dev": "ava __tests__/*.test.mjs --no-coverage-report --watch",
     "test": "nyc --reporter=lcov ava",
     "semantic-release": "semantic-release"
   },

parser-version.mjs

@@ -2,8 +2,9 @@ export const v208 = '208';
 export const v207 = '207';
 export const FIRST = v207;
 export const LATEST = v208;
+export const LATEST_TEXT = 'LATEST';
 
-const valid = [v208, v207];
+export const valid = [LATEST_TEXT, v208, v207];
 
 global.parser = LATEST;
 
@@ -13,6 +14,11 @@ global.parser = LATEST;
  * @param {string} value
  */
 export function setParser(value) {
+  value = value.toUpperCase();
+  if (value === LATEST_TEXT) {
+    value = LATEST;
+  }
+
   if (!valid.includes(value)) {
     throw new Error(`Unknown parser: ${value} - try "${LATEST}"`);
   }