fix: fix importing mappings. closes #1454

Author: satya164

scripts/generate-mappings.js

@@ -60,4 +60,7 @@ const mappings = ast.program.body.reduce((acc, declaration, index, self) => {
 }, {});
 
 fs.existsSync(path.dirname(output)) || fs.mkdirSync(path.dirname(output));
-fs.writeFileSync(output, JSON.stringify({ index, mappings }, null, 2));
+fs.writeFileSync(
+  output,
+  JSON.stringify({ name: packageJson.name, index, mappings }, null, 2)
+);

src/babel/__tests__/index.js

@@ -10,7 +10,12 @@ spawnSync('node', [
 ]);
 
 const { fixtures } = create({
-  plugins: [require.resolve('../index')],
+  plugins: [
+    [
+      require.resolve('../index'),
+      { mappings: require.resolve('../../../lib/mappings.json') },
+    ],
+  ],
 });
 
 fixtures('generate mappings', path.join(__dirname, '..', '__fixtures__'));

src/babel/index.js

@@ -1,10 +1,11 @@
-const { index, mappings } = require('../../lib/mappings.json');
-const { name } = require('../../package.json');
-
 const SKIP = Symbol('SKIP');
 
-module.exports = function rewire(babel) {
+module.exports = function rewire(babel, options) {
   const t = babel.types;
+
+  const { name, index, mappings } = require(options.mappings ||
+    '../../mappings.json');
+
   return {
     visitor: {
       ImportDeclaration(path) {