feat: server side resolve alias

Author: njugray

packages/beidou-plugin-isomorphic/config/config.default.js

@@ -1,5 +1,6 @@
+const path = require('path');
 
-module.exports = function () {
+module.exports = function (app) {
   const config = {
     /**
      * JSDom polyfill, simulate browser environment in server
@@ -65,6 +66,10 @@ module.exports = function () {
      */
 
     universal: false,
+
+    alias: {
+      client: path.join(app.baseDir, 'client'),
+    },
   };
 
   return {

packages/beidou-plugin-isomorphic/lib/alias.js

@@ -0,0 +1,16 @@
+const Module = require('module');
+const path = require('path');
+
+module.exports = function handle(config) {
+  const originalResolveFileName = Module._resolveFilename;
+  const keys = Object.keys(config);
+  Module._resolveFilename = function (request, parent) {
+    for (let i = 0; i < keys.length; i += 1) {
+      if (request === keys[i] || request.indexOf(`${keys[i]}/`) === 0) {
+        request = path.normalize(`${config[keys[i]]}${request.substring(keys[i].length)}`);
+        break;
+      }
+    }
+    return originalResolveFileName.apply(this, [request, parent]);
+  };
+};

packages/beidou-plugin-isomorphic/lib/isomorphic.js

@@ -3,6 +3,7 @@
 const path = require('path');
 const fs = require('fs');
 const Module = require('module');
+const resolveAlias = require('./alias');
 
 function requireAssetsJson(filepath, logger) {
   let json = {};
@@ -41,6 +42,15 @@ module.exports = function (app) {
   const baseDir = app.config.baseDir;
 
   const logger = app.logger;
+
+  if (isomorphic.alias) {
+    const alias = isomorphic.alias;
+    if (alias && Object.keys(alias).length > 0) {
+      app.logger.info('[beidou:plugin:isomorphic] isomorphic.alias detected: %o', alias);
+      resolveAlias(alias);
+    }
+  }
+
   if (isomorphic.universal) {
     const universal = Object.assign({
       context: baseDir,