featur: @putout/engine-parser: add reason when cannot parse

Author: coderaiser

packages/engine-parser/lib/parse.js

@@ -2,6 +2,7 @@
 
 const toBabel = require('estree-to-babel');
 const customParser = require('./custom-parser');
+const {tryThrowWithReason} = require('./try-throw-with-reason');
 const {assign} = Object;
 
 module.exports = (source, options) => {
@@ -12,14 +13,14 @@ module.exports = (source, options) => {
         isJSX,
     } = options || {};
 
-    const cookedParser = getParser({
+    const {parse} = getParser({
         printer,
         parser,
         isTS,
         isJSX,
     });
 
-    return cookedParser.parse(source);
+    return tryThrowWithReason(parse, source);
 };
 
 const getParser = ({parser = 'babel', isTS, isJSX, printer}) => ({

packages/engine-parser/lib/try-throw-with-reason.js

@@ -0,0 +1,14 @@
+'use strict';
+
+const tryCatch = require('try-catch');
+
+module.exports.tryThrowWithReason = (fn, ...args) => {
+    const [error, result] = tryCatch(fn, ...args);
+    
+    if (error) {
+        error.reason = 'parse';
+        throw error;
+    }
+    
+    return result;
+};

packages/engine-parser/test/parser.js

@@ -195,6 +195,13 @@ test('putout: parser: no-flow', (t) => {
     t.end();
 });
 
+test('putout: parser: broken', (t) => {
+    const [error] = tryCatch(putout, 'console.lo(');
+    
+    t.equal(error.reason, 'parse');
+    t.end();
+});
+
 test('putout: parser: typescript', (t) => {
     const {code} = putout(fixture.typescript, {
         isTS: true,