refactor: allow embedder overriding of internal FS calls (#17906) (#18183)

DEPS

@@ -12,7 +12,7 @@ vars = {
   'chromium_version':
     '84c40395c741fa24ccbd9fc2c5828e2e97472952',
   'node_version':
-    '696d8fb66d6f65fc82869d390e0d2078970b1eb4',
+    'a86a4a160dc520c61a602c949a32a1bc4c0fc633',
 
   'boto_version': 'f7574aa6cc2c819430c1f05e9a1a1a666ef8169b',
   'pyyaml_version': '3.12',

lib/common/asar.js

@@ -13,6 +13,9 @@
       process.type !== 'renderer'
   const isAsarDisabled = () => process.noAsar || envNoAsar
 
+  const internalBinding = process.internalBinding
+  delete process.internalBinding
+
   /**
    * @param {!Function} functionToCall
    * @param {!Array|undefined} args
@@ -669,8 +672,8 @@
       return files
     }
 
-    const { internalModuleReadJSON } = process.binding('fs')
-    process.binding('fs').internalModuleReadJSON = pathArgument => {
+    const { internalModuleReadJSON } = internalBinding('fs')
+    internalBinding('fs').internalModuleReadJSON = pathArgument => {
       const { isAsar, asarPath, filePath } = splitPath(pathArgument)
       if (!isAsar) return internalModuleReadJSON(pathArgument)
 
@@ -694,8 +697,8 @@
       return buffer.toString('utf8')
     }
 
-    const { internalModuleStat } = process.binding('fs')
-    process.binding('fs').internalModuleStat = pathArgument => {
+    const { internalModuleStat } = internalBinding('fs')
+    internalBinding('fs').internalModuleStat = pathArgument => {
       const { isAsar, asarPath, filePath } = splitPath(pathArgument)
       if (!isAsar) return internalModuleStat(pathArgument)
 

spec/fixtures/api/electron-main-module/app/index.js

@@ -0,0 +1,8 @@
+try {
+  require('some-module')
+} catch (err) {
+  console.error(err)
+  process.exit(1)
+}
+
+process.exit(0)

spec/fixtures/api/electron-main-module/app/node_modules/some-module/main2.js

@@ -0,0 +1 @@
+// Nothing to do here

spec/fixtures/api/electron-main-module/app/node_modules/some-module/package.json

@@ -0,0 +1,4 @@
+{
+  "name": "some-module",
+  "main": "./main2.js"
+}

spec/node-spec.js

@@ -578,4 +578,9 @@ describe('node feature', () => {
       .that.is.a('string')
       .and.matches(/^\d+\.\d+\.\d+\.\d+$/)
   })
+
+  it('can find a module using a package.json main field', () => {
+    const result = ChildProcess.spawnSync(remote.process.execPath, [path.resolve(fixtures, 'api', 'electron-main-module', 'app.asar')])
+    expect(result.status).to.equal(0)
+  })
 })