feat: In Memory File System (#154)

Author: MagnunAVFAzion

lib/build/bundlers/esbuild/index.js

@@ -36,6 +36,17 @@ class Esbuild {
       config.plugins = [NodeModulesPolyfillPlugin(), ...config.plugins];
     }
 
+    // inject content in worker initial code.
+    if (this.builderConfig.contentToInject) {
+      const workerInitContent = this.builderConfig.contentToInject;
+
+      if (config.banner?.js) {
+        config.banner.js = `${config.banner.js} ${workerInitContent}`;
+      } else {
+        config.banner = { js: workerInitContent };
+      }
+    }
+
     try {
       await esbuild.build(config);
     } catch (error) {

lib/build/bundlers/webpack/index.js

@@ -31,6 +31,36 @@ class Webpack {
       config = merge(this.customConfigPreset, this.customConfigLocal, config);
     }
 
+    // inject content in worker initial code.
+    if (this.builderConfig.contentToInject) {
+      const workerInitContent = this.builderConfig.contentToInject;
+
+      const bannerPluginIndex = config.plugins.findIndex(
+        (plugin) => plugin instanceof webpack.BannerPlugin,
+      );
+
+      if (bannerPluginIndex !== -1) {
+        const oldContent = config.plugins[bannerPluginIndex].options.banner;
+        const pluginToRemove = config.plugins[bannerPluginIndex];
+        config.plugins = config.plugins.filter(
+          (plugin) => plugin !== pluginToRemove,
+        );
+        config.plugins.push(
+          new webpack.BannerPlugin({
+            banner: `${oldContent} ${workerInitContent}`,
+            raw: true,
+          }),
+        );
+      } else {
+        config.plugins.push(
+          new webpack.BannerPlugin({
+            banner: workerInitContent,
+            raw: true,
+          }),
+        );
+      }
+    }
+
     try {
       const stats = await runWebpack(config);
 

lib/build/dispatcher/dispatcher.js

@@ -19,6 +19,7 @@ import {
   getPackageManager,
   getProjectJsonFile,
   relocateImportsAndRequires,
+  injectFilesInMem,
 } from '#utils';
 import { Messages } from '#constants';
 import { vulcan } from '#env';
@@ -332,6 +333,21 @@ class Dispatcher {
       config.localCustom = this.custom;
 
       const builderSelected = this.builder || config.builder;
+
+      const { injectionDirs, removePathPrefix } = this.memoryFS;
+      if (injectionDirs && injectionDirs.length > 0) {
+        const content = await injectFilesInMem(injectionDirs);
+
+        const prefix =
+          removePathPrefix &&
+          typeof removePathPrefix === 'string' &&
+          removePathPrefix !== ''
+            ? `'${removePathPrefix}'`
+            : `''`;
+
+        config.contentToInject = `globalThis.FS_PATH_PREFIX_TO_REMOVE = ${prefix};\n${content}`;
+      }
+
       let builder;
       switch (builderSelected) {
         case 'webpack':