fix(babel-plugin-export-metadata): add case for export default… (#1417)

other-packages/babel-plugin-export-metadata/src/index.js

@@ -19,6 +19,11 @@ const replaceExportDefault = template(`
   export default NAME
 `)
 
+const replaceExportDefaultCall = template(`
+  const NAME = DECLARATION
+  export default NAME
+`)
+
 const getFilename = state => {
   const rootDir = get(state, 'opts.root', process.cwd())
   const filename = get(state, 'file.opts.filename')
@@ -68,6 +73,26 @@ const renameDefaultAddFileMetaProperties = (t, path, filename, name) => {
   pathToInsert.replaceWithMultiple(nameExport)
 }
 
+const replaceDefaultCallAddFileMetaProperties = (t, path, filename) => {
+  if (!filename) {
+    return
+  }
+
+  const declaration = get(path, 'node.declaration')
+  const pathToInsert = findPathToInsert(path)
+
+  const fallbackName = '__DOCZ_DUMMY_EXPORT_DEFAULT'
+
+  // replace
+  const nameExport = replaceExportDefaultCall({
+    NAME: fallbackName,
+    DECLARATION: declaration,
+  })
+
+  const [declPath] = pathToInsert.replaceWithMultiple(nameExport)
+  path.scope.registerDeclaration(declPath)
+}
+
 const insertNodeExport = t => (path, state) => {
   const filename = getFilename(state)
   if (/(\.cache|\.docz).+/.test(filename)) return
@@ -130,6 +155,12 @@ const insertNodeExportDefault = t => (path, state) => {
       }
       break
     }
+
+    case 'CallExpression': {
+      // case for: export default React.memo(Component).
+      replaceDefaultCallAddFileMetaProperties(t, path, filename)
+      break
+    }
   }
 }
 

other-packages/babel-plugin-export-metadata/tests/__snapshots__/index.test.js.snap

@@ -29,6 +29,25 @@ if (typeof foo5 !== 'undefined' && foo5 && foo5 === Object(foo5) && Object.isExt
 }"
 `;
 
+exports[`export-metadata export default works with Call expression 1`] = `
+"/* ExportDefaultDeclaration with Call expression */
+const foo = v => v;
+
+const __DOCZ_DUMMY_EXPORT_DEFAULT = foo(5);
+
+export default __DOCZ_DUMMY_EXPORT_DEFAULT;
+
+if (typeof __DOCZ_DUMMY_EXPORT_DEFAULT !== 'undefined' && __DOCZ_DUMMY_EXPORT_DEFAULT && __DOCZ_DUMMY_EXPORT_DEFAULT === Object(__DOCZ_DUMMY_EXPORT_DEFAULT) && Object.isExtensible(__DOCZ_DUMMY_EXPORT_DEFAULT) && !__DOCZ_DUMMY_EXPORT_DEFAULT.hasOwnProperty('__filemeta')) {
+  Object.defineProperty(__DOCZ_DUMMY_EXPORT_DEFAULT, '__filemeta', {
+    configurable: true,
+    value: {
+      name: \\"__DOCZ_DUMMY_EXPORT_DEFAULT\\",
+      filename: \\"tests/fixtures/export-default/with-identifier.js\\"
+    }
+  });
+}"
+`;
+
 exports[`export-metadata export default works with Class declaration 1`] = `
 "/* ExportDefaultDeclaration with Class declaration */
 export default class Bar6 {}

other-packages/babel-plugin-export-metadata/tests/fixtures/export-default/with-call-expression.js

@@ -0,0 +1,3 @@
+/* ExportDefaultDeclaration with Call expression */
+const foo = v => v
+export default foo(5)

other-packages/babel-plugin-export-metadata/tests/index.test.js

@@ -23,6 +23,9 @@ const exportDefaultFixtures = {
   withObjExpression: path.resolve(
     './tests/fixtures/export-default/with-obj-expression.js'
   ),
+  withCallExpression: path.resolve(
+    './tests/fixtures/export-default/with-call-expression.js'
+  ),
 }
 
 const reExportsFixtures = {
@@ -113,6 +116,15 @@ describe('export-metadata', () => {
 
       expect(result.code).toMatchSnapshot()
     })
+
+    it('works with Call expression', () => {
+      const result = transformSync(exportDefaultCode.withCallExpression, {
+        plugins: [plugin],
+        filename: exportDefaultFixtures.withIdentifier,
+      })
+
+      expect(result.code).toMatchSnapshot()
+    })
   })
 
   describe('export named', () => {