From 9339d9e361a06fc5bafec314d4baa2563bd06e42 Mon Sep 17 00:00:00 2001
From: X <i@jex.me>
Date: Sat, 19 Mar 2022 00:34:27 +0800
Subject: [PATCH] Rollback `parseCJSModuleExports` to v68 (close #277, #279)

---
 packages/esm-node-services/cjs-lexer.js | 46 ++++++++-----------------
 packages/esm-node-services/package.json |  2 +-
 packages/esm-node-services/test.js      | 20 ++---------
 server/module.go                        |  6 +---
 server/node_services.go                 |  3 +-
 5 files changed, 20 insertions(+), 57 deletions(-)

diff --git a/packages/esm-node-services/cjs-lexer.js b/packages/esm-node-services/cjs-lexer.js
index fb88d4dc9..766e30101 100644
--- a/packages/esm-node-services/cjs-lexer.js
+++ b/packages/esm-node-services/cjs-lexer.js
@@ -1,5 +1,5 @@
 const fs = require('fs')
-const { join, dirname } = require('path')
+const { dirname } = require('path')
 const { promisify } = require('util')
 const { parse } = require('esm-cjs-lexer')
 const enhancedResolve = require('enhanced-resolve')
@@ -79,7 +79,6 @@ const builtInNodeModules = new Set([
   "zlib",
 ])
 const requireModeAllowList = [
-  'graceful-fs',
   'domhandler',
   'he',
   'lz-string',
@@ -109,32 +108,24 @@ function verifyExports(names) {
 }
 
 exports.parseCjsExports = async input => {
-  const { buildDir, pkgName, importPath, nodeEnv = 'production' } = input
+  const { buildDir, importPath, nodeEnv = 'production' } = input
+  const entry = await resolve(buildDir, importPath)
   const exports = []
 
-  let entry
-  try {
-    entry = await resolve(buildDir, join(pkgName, importPath))
-  } catch (error) {
-    if (importPath.endsWith(".js") || importPath.endsWith(".cjs") || importPath.endsWith(".json")) {
-      entry = join(buildDir, "node_modules", pkgName, importPath)
-    } else {
-      throw error
-    }
-  }
-
   /* workaround for edge cases that can't be parsed by cjsLexer correctly */
-  if (requireModeAllowList.includes(pkgName)) {
-    process.env.NODE_ENV = nodeEnv
-    const mod = require(entry)
-    if (isObject(mod) || typeof mod === 'function') {
-      for (const key of Object.keys(mod)) {
-        if (typeof key === 'string' && key !== '') {
-          exports.push(key)
+  for (const name of requireModeAllowList) {
+    if (importPath === name || importPath.startsWith(name + '/')) {
+      process.env.NODE_ENV = nodeEnv
+      const mod = require(entry)
+      if (isObject(mod) || typeof mod === 'function') {
+        for (const key of Object.keys(mod)) {
+          if (typeof key === 'string' && key !== '') {
+            exports.push(key)
+          }
         }
       }
+      return verifyExports(exports)
     }
-    return verifyExports(exports)
   }
 
   if (entry.endsWith('.json')) {
@@ -161,16 +152,7 @@ exports.parseCjsExports = async input => {
           const mod = require(reexport)
           exports.push(...Object.keys(mod))
         } else {
-          let path
-          try {
-            path = await resolve(buildDir, join(pkgName, dirname(importPath), reexport))
-          } catch (error) {
-            if (reexport.endsWith(".js") || reexport.endsWith(".cjs") || reexport.endsWith(".json")) {
-              path = join(dirname(req.path), reexport)
-            } else {
-              throw error
-            }
-          }
+          const path = await resolve(dirname(req.path), reexport)
           if (path.endsWith('.json')) {
             exports.push(...getJSONKeys(path))
           } else {
diff --git a/packages/esm-node-services/package.json b/packages/esm-node-services/package.json
index 7e0d5f220..85e793174 100644
--- a/packages/esm-node-services/package.json
+++ b/packages/esm-node-services/package.json
@@ -1,6 +1,6 @@
 {
   "name": "esm-node-services",
-  "version": "0.6.10",
+  "version": "0.6.11",
   "description": "Node services for esm.sh",
   "main": "index.js",
   "scripts": {
diff --git a/packages/esm-node-services/test.js b/packages/esm-node-services/test.js
index 907a9ea79..782c52c2b 100644
--- a/packages/esm-node-services/test.js
+++ b/packages/esm-node-services/test.js
@@ -1,23 +1,9 @@
 const ns = require('.')
 
-ns.parseCjsExports({ buildDir: __dirname, pkgName: "tapable", importPath: './lib/index.js' }).then(ret => {
+ns.parseCjsExports({ buildDir: __dirname, importPath: '.' }).then(ret => {
   const { exports } = ret
-  if (exports.join(',') !== [
-    '__esModule',
-    'SyncHook',
-    'SyncBailHook',
-    'SyncWaterfallHook',
-    'SyncLoopHook',
-    'AsyncParallelHook',
-    'AsyncParallelBailHook',
-    'AsyncSeriesHook',
-    'AsyncSeriesBailHook',
-    'AsyncSeriesLoopHook',
-    'AsyncSeriesWaterfallHook',
-    'HookMap',
-    'MultiHook',
-  ].join(',')) {
-    console.error('unexpected exports:', exports)
+  if (exports.join(',') !== 'parseCjsExports') {
+    console.error('unexpected exports of index.js:', exports)
     process.exit(1)
   }
   console.log('Done')
diff --git a/server/module.go b/server/module.go
index 86b75f719..661a1712f 100644
--- a/server/module.go
+++ b/server/module.go
@@ -180,11 +180,7 @@ func initModule(wd string, pkg Pkg, target string, isDev bool) (esm *Module, err
 		}
 		for i := 0; i < 3; i++ {
 			var ret cjsExportsResult
-			importPath := pkg.Submodule
-			if esm.Main != "" {
-				importPath = esm.Main
-			}
-			ret, err = parseCJSModuleExports(wd, pkg.Name, importPath, nodeEnv)
+			ret, err = parseCJSModuleExports(wd, pkg.ImportPath(), nodeEnv)
 			if err != nil {
 				return
 			}
diff --git a/server/node_services.go b/server/node_services.go
index ce56faf42..b0df8d46b 100644
--- a/server/node_services.go
+++ b/server/node_services.go
@@ -223,10 +223,9 @@ type cjsExportsResult struct {
 	Error         string   `json:"error"`
 }
 
-func parseCJSModuleExports(buildDir string, pkgName, importPath string, nodeEnv string) (ret cjsExportsResult, err error) {
+func parseCJSModuleExports(buildDir string, importPath string, nodeEnv string) (ret cjsExportsResult, err error) {
 	data := invokeNodeService("parseCjsExports", map[string]interface{}{
 		"buildDir":   buildDir,
-		"pkgName":    pkgName,
 		"importPath": importPath,
 		"nodeEnv":    nodeEnv,
 	})