feat: allow loading ts compiler from cwd (#169)

test case under node 8

Co-authored-by: dengruoqi <dengruoqi@enn.cn>

.gitignore

@@ -17,6 +17,7 @@ test/fixtures/ts/node_modules/aliyun-egg/
 test/fixtures/example-ts-ets/typings/
 !test/fixtures/example-ts-ets/node_modules/
 !test/fixtures/example-ts-simple/node_modules/
+!test/fixtures/example-ts-custom-compiler/node_modules/
 
 
 **/run/*.json

lib/command.js

@@ -87,7 +87,8 @@ class Command extends BaseCommand {
 
     // load ts-node
     if (argv.typescript) {
-      execArgvObj.require.push(require.resolve(argv.tscompiler));
+      // try to load from `cwd` first
+      execArgvObj.require.push(require.resolve(argv.tscompiler, { paths: [ cwd ] }));
 
       // tell egg loader to load ts file
       env.EGG_TYPESCRIPT = 'true';

test/fixtures/example-ts-custom-compiler/config/config.default.ts

@@ -0,0 +1,3 @@
+'use strict';
+
+export const key = '12345';

test/fixtures/example-ts-custom-compiler/package.json

@@ -0,0 +1,3 @@
+{
+  "name": "example-ts-custom-compiler"
+}

test/ts.test.js

@@ -5,7 +5,9 @@ const coffee = require('coffee');
 const mm = require('mm');
 const fs = require('fs');
 const rimraf = require('mz-modules/rimraf');
+const exec = require('mz/child_process').exec;
 const os = require('os');
+const assert = require('assert');
 
 describe('test/ts.test.js', () => {
   const eggBin = require.resolve('../bin/egg-bin');
@@ -149,6 +151,17 @@ describe('test/ts.test.js', () => {
   });
 
   describe('egg.typescript = true', () => {
+    const tempNodeModules = path.join(__dirname, './fixtures/node_modules');
+    const tempPackageJson = path.join(__dirname, './fixtures/package.json');
+    afterEach(async () => {
+      if (fs.existsSync(tempNodeModules)) {
+        await rimraf(tempNodeModules);
+      }
+      if (fs.existsSync(tempPackageJson)) {
+        await rimraf(tempPackageJson);
+      }
+    });
+
     if (process.env.EGG_VERSION && process.env.EGG_VERSION === '1') {
       console.log('skip egg@1');
       return;
@@ -192,6 +205,19 @@ describe('test/ts.test.js', () => {
         .end();
     });
 
+    it('should load custom ts compiler', async () => {
+      const cwd = path.join(__dirname, './fixtures/example-ts-custom-compiler');
+
+      // install custom ts-node
+      await exec('npx cnpm install ts-node@8.10.2', { cwd: path.join(__dirname, './fixtures') });
+
+      const { stderr, code } = await coffee.fork(eggBin, [ 'dev', '--ts' ], { cwd, env: { DEBUG: 'egg-bin' } })
+        .debug()
+        .end();
+      assert(/ts-node@8\.10\.2/.test(stderr));
+      assert.equal(code, 0);
+    });
+
     it('should start app with other tscompiler without error', () => {
       return coffee.fork(eggBin, [ 'dev', '--ts', '--tscompiler=esbuild-register' ], {
         cwd: path.join(__dirname, './fixtures/example-ts'),