Fix that whole export debacle (#1370)

* Re-add setting exports

* Update webpack.production.config.js

* Update mod.js

* Slight change

* Update mod.js

* Update webpack.production.config.js

* Update webpack.config.js

gulp/mod.js

@@ -1,3 +1,39 @@
-module.exports = function (source, map) {
-    return source + `\nexport let $s=(n,v)=>eval(n+"=v")`;
+const oneExport = exp => {
+    return `${exp}=v`; // No checks needed
+};
+
+const twoExports = (exp1, exp2) => {
+    return `n=="${exp1}"?${exp1}=v:${exp2}=v`;
+};
+
+const multiExports = exps => {
+    exps = exps.map(exp => `case "${exp}":${exp}=v;break;`);
+
+    return `switch(n){${exps.toString().replaceAll(";,", ";")} }`;
+};
+
+const defineFnBody = source => {
+    const regex = /export (?:let|class) (?<name>\w+)/g;
+    let names = [...source.matchAll(regex)].map(n => n.groups.name);
+    switch (names.length) {
+        case 0:
+            return false;
+        case 1:
+            return oneExport(names[0]);
+        case 2:
+            return twoExports(names[0], names[1]);
+        default:
+            return multiExports(names);
+    }
+};
+/**
+ *
+ * @param {string} source
+ * @param {*} map
+ * @returns
+ */
+module.exports = function (source, map) {
+    const body = defineFnBody(source);
+    if (!body) return source;
+    return source + `\nexport const __$S__=(n,v)=>{${body}}`;
 };

gulp/webpack.config.js

@@ -93,6 +93,10 @@ module.exports = ({ watch = false, standalone = false, chineseVersion = false, w
                                 end: "typehints:end",
                             },
                         },
+                        {
+                            loader: path.resolve(__dirname, "mod.js"),
+                        },
+                    ],
                     ],
                 },
                 {

gulp/webpack.production.config.js

@@ -131,6 +131,7 @@ module.exports = ({
                             warnings: true,
                         },
                         mangle: {
+                            reserved: ["__$S__"],
                             eval: true,
                             keep_classnames: !minifyNames,
                             keep_fnames: !minifyNames,
@@ -210,6 +211,9 @@ module.exports = ({
                     test: /\.js$/,
                     use: [
                         // "thread-loader",
+                        {
+                            loader: path.resolve(__dirname, "mod.js"),
+                        },
                         {
                             loader: "babel-loader?cacheDirectory",
                             options: {

src/js/mods/modloader.js

@@ -112,7 +112,8 @@ export class ModLoader {
                 // @ts-ignore
                 const module = modules(key);
                 for (const member in module) {
-                    if (member === "default") {
+                    if (member === "default" || member === "__$S__") {
+                        // Setter
                         continue;
                     }
                     if (exports[member]) {
@@ -124,7 +125,7 @@ export class ModLoader {
                             return module[member];
                         },
                         set(v) {
-                            throw new Error("Overriding the shapez exports is currently not possible");
+                            module.__$S__(member, v);
                         },
                     });
                 }