fix(findExports): disable tokenizer if parsing fails (resolves #64)

src/analyze.ts

@@ -130,14 +130,14 @@ export function findExports (code: string): ESMExport[] {
   if (!exports.length) {
     return []
   }
-  const exportLocations = _getExportLocations(code)
-  if (!exportLocations.length) {
+  const exportLocations = _tryGetExportLocations(code)
+  if (exportLocations && !exportLocations.length) {
     return []
   }
 
   return exports.filter((exp, index, exports) => {
     // Filter false positive export matches
-    if (!_isExportStatement(exportLocations, exp)) {
+    if (exportLocations && !_isExportStatement(exportLocations, exp)) {
       return false
     }
     // Prevent multiple exports of same function, only keep latest iteration of signatures
@@ -168,6 +168,14 @@ function _isExportStatement (exportsLocation: TokenLocation[], exp: ESMExport) {
   return exportsLocation.some(location => exp.start <= location.start && exp.end >= location.end)
 }
 
+function _tryGetExportLocations (code: string) {
+  try {
+    return _getExportLocations(code)
+  } catch (err) {
+    return null
+  }
+}
+
 function _getExportLocations (code: string) {
   const tokens = tokenizer(code, {
     ecmaVersion: 'latest',

test/exports.test.ts

@@ -15,7 +15,9 @@ describe('findExports', () => {
     'export const $foo = () => {}': { type: 'declaration', names: ['$foo'] },
     'export { foo as default }': { type: 'default', name: 'default', names: ['default'] },
     'export * from "./other"': { type: 'star', specifier: './other' },
-    'export * as foo from "./other"': { type: 'star', specifier: './other', name: 'foo' }
+    'export * as foo from "./other"': { type: 'star', specifier: './other', name: 'foo' },
+    // eslint-disable-next-line no-template-curly-in-string
+    'const a = `<div${JSON.stringify({ class: 42 })}>`;\nexport default true;': { type: 'default', name: 'default', names: ['default'] }
   }
 
   for (const [input, test] of Object.entries(tests)) {