feat(alita): 添加flow支持

fix #29

package.json

@@ -50,6 +50,7 @@
     "@babel/plugin-syntax-jsx": "^7.0.0",
     "@babel/plugin-transform-react-jsx": "^7.1.6",
     "@babel/plugin-transform-runtime": "^7.5.0",
+    "@babel/preset-flow": "^7.0.0",
     "@babel/traverse": "^7.1.6",
     "@babel/types": "^7.1.6",
     "babel-eslint": "^8.2.6",

src/util/uast.js

@@ -64,6 +64,7 @@ export function geneReactCode(ast) {
     code = babel.transformSync(code, {
         babelrc: false,
         configFile: false,
+        presets: ["@babel/preset-flow"],
         plugins: [
             babelDecorators,
             babelRestSpread,

test/util/uast.test.js

@@ -0,0 +1,26 @@
+/**
+ * Copyright (c) Areslabs.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ *
+ */
+
+import {parseCode, geneReactCode} from '../../src/util/uast'
+
+describe('uast', () => {
+
+
+    it("parseCode geneReactCode: flow语法支持", () => {
+        const code = `
+        function foo(one: any, two: number, three?): string {}
+        `
+
+        const ast = parseCode(code)
+        const newcode = geneReactCode(ast)
+
+        const expectCode = `function foo(one, two, three) {}`
+        expect(newcode).toBe(expectCode)
+    })
+
+})