fix: support constructor function

e2e/__projects__/babel-config/__snapshots__/test.js.snap

@@ -1,8 +1,7 @@
 // Jest Snapshot v1, https://goo.gl/fbAQLP
 
 exports[`generates source maps for .vue files 1`] = `
-"var exports = {}
-\\"use strict\\";
+"\\"use strict\\";
 
 Object.defineProperty(exports, \\"__esModule\\", {
   value: true
@@ -54,12 +53,10 @@ var _default = {
   }
 };
 exports.default = _default;
-
-if(!exports.default) {
-  exports.default = {}
-}
-var __options__ = module.exports = exports.default
-Object.keys(exports).forEach(k => module.exports[k] = exports[k])
+;
+var __options__ = typeof exports.default === 'function'
+? exports.default.options
+: exports.default
 var render = function() {
   var _vm = this
   var _h = _vm.$createElement
@@ -89,12 +86,11 @@ this['$style'], {\\"testB\\":\\"testB\\"});
   __options__.beforeCreate = beforeCreate ? [].concat(beforeCreate, styleFn) : [styleFn]
 })()
 
-//# sourceMappingURL=data:application/json;charset=utf-8;base64,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"
+//# sourceMappingURL=data:application/json;charset=utf-8;base64,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"
 `;
 
 exports[`generates source maps using src attributes 1`] = `
-"var exports = {}
-\\"use strict\\";
+"\\"use strict\\";
 
 Object.defineProperty(exports, \\"__esModule\\", {
   value: true
@@ -124,12 +120,10 @@ var _default = {
   }
 };
 exports.default = _default;
-
-if(!exports.default) {
-  exports.default = {}
-}
-var __options__ = module.exports = exports.default
-Object.keys(exports).forEach(k => module.exports[k] = exports[k])
+;
+var __options__ = typeof exports.default === 'function'
+? exports.default.options
+: exports.default
 var render = function() {
   var _vm = this
   var _h = _vm.$createElement
@@ -144,5 +138,5 @@ render._withStripped = true
 __options__.render = render
 __options__.staticRenderFns = staticRenderFns
 
-//# sourceMappingURL=data:application/json;charset=utf-8;base64,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"
+//# sourceMappingURL=data:application/json;charset=utf-8;base64,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"
 `;

e2e/__projects__/babel-config/components/CoffeeScript.vue

@@ -3,6 +3,6 @@
 </template>
 
 <script lang="coffeescript">
-module.exports =
+export default
     data: -> {}
 </script>

e2e/__projects__/babel-config/components/Constructor.vue

@@ -0,0 +1,9 @@
+<template>
+  <div />
+</template>
+
+<script>
+import Vue from 'vue'
+
+export default Vue.extend()
+</script>

e2e/__projects__/babel-config/test.js

@@ -21,6 +21,7 @@ import PostCss from './components/PostCss.vue'
 import Pug from './components/Pug.vue'
 import PugRelative from './components/PugRelativeExtends.vue'
 import Jsx from './components/Jsx.vue'
+import Constructor from './components/Constructor.vue'
 
 test('processes .vue files', () => {
   const wrapper = mount(Basic)
@@ -60,22 +61,27 @@ test('generates source maps using src attributes', () => {
 
 test('processes .vue file using jsx', () => {
   const wrapper = mount(Jsx)
-  expect(wrapper.vm).toBeTruthy()
+  expect(wrapper.is('div')).toBeTruthy()
+})
+
+test('processes extended functions', () => {
+  const wrapper = mount(Constructor)
+  expect(wrapper.is('div')).toBeTruthy()
 })
 
 test('processes .vue file with lang set to coffee', () => {
   const wrapper = mount(Coffee)
-  expect(wrapper.vm).toBeTruthy()
+  expect(wrapper.is('div')).toBeTruthy()
 })
 
 test('processes .vue file with lang set to coffeescript', () => {
   const wrapper = mount(CoffeeScript)
-  expect(wrapper.vm).toBeTruthy()
+  expect(wrapper.is('div')).toBeTruthy()
 })
 
 test('processes .vue files with lang set to typescript', () => {
   const wrapper = mount(TypeScript)
-  expect(wrapper.vm).toBeTruthy()
+  expect(wrapper.is('div')).toBeTruthy()
 })
 
 test('processes functional components', () => {
@@ -102,30 +108,30 @@ test('handles missing script block', () => {
 
 test('processes .vue file with jade template', () => {
   const wrapper = mount(Jade)
-  expect(wrapper.is('div')).toBe(true)
+  expect(wrapper.is('div')).toBeTruthy()
   expect(wrapper.classes()).toContain('jade')
 })
 
 it('processes Less', () => {
   const wrapper = mount(Less)
-  expect(wrapper.vm).toBeTruthy()
+  expect(wrapper.is('div')).toBeTruthy()
 })
 
 it('processes PostCSS', () => {
   const wrapper = mount(PostCss)
-  expect(wrapper.vm).toBeTruthy()
+  expect(wrapper.is('div')).toBeTruthy()
 })
 
 test('processes pug templates', () => {
   const wrapper = mount(Pug)
-  expect(wrapper.is('div')).toBe(true)
+  expect(wrapper.is('div')).toBeTruthy()
   expect(wrapper.classes()).toContain('pug-base')
   expect(wrapper.find('.pug-extended').exists()).toBeTruthy()
 })
 
 test('supports relative paths when extending templates from .pug files', () => {
   const wrapper = mount(PugRelative)
-  expect(wrapper.is('div')).toBe(true)
+  expect(wrapper.is('div')).toBeTruthy()
   expect(wrapper.find('.pug-relative-base').exists()).toBeTruthy()
 })
 

lib/generate-source-map.js

@@ -14,9 +14,7 @@ module.exports = function generateSourceMap(
 
   map.setSourceContent(filename, content)
   // check input source map from babel/coffee etc
-
   let inputMapConsumer = inputMap && new sourceMap.SourceMapConsumer(inputMap)
-  const generatedOffset = 1
   script.split(splitRE).forEach(function(line, index) {
     let ln = index + 1
     let originalLine = inputMapConsumer
@@ -26,7 +24,7 @@ module.exports = function generateSourceMap(
       map.addMapping({
         source: filename,
         generated: {
-          line: ln + generatedOffset,
+          line: ln,
           column: 0
         },
         original: {

lib/process.js

@@ -65,14 +65,22 @@ module.exports = function(src, filePath, config) {
     inputMap
   )
 
-  let output =
-    `var exports = {}\n` +
-    `${compiledScriptContent}\n` +
-    `if(!exports.default) {\n` +
-    `  exports.default = {}\n` +
-    `}\n` +
-    `var __options__ = module.exports = exports.default\n` +
-    `Object.keys(exports).forEach(k => module.exports[k] = exports[k])\n`
+  let output = ''
+
+  if (compiledScriptContent) {
+    output += `${compiledScriptContent};\n`
+  } else {
+    output +=
+      `Object.defineProperty(exports, "__esModule", {\n` +
+      `  value: true\n` +
+      `});\n` +
+      'module.exports.default = {};\n'
+  }
+
+  output +=
+    `var __options__ = typeof exports.default === 'function'\n` +
+    `? exports.default.options\n` +
+    `: exports.default\n`
 
   if (parts.template) {
     parts.template.filename = filePath