Gulp uglify因js解析错误而失败

Question

我正在为一个非常恼人的错误而苦苦挣扎.首先:我是新来的.

我尝试用Angular实现单页面应用程序.为了使我的工作流程更好,我尝试实现gulp.

我在安装一些gulp插件时遇到了一些严重的npm错误,但这是另一个故事,我意识到,它有或没有错误.

我真正想到的是useref插件.或者更确切地说,uglify插件.

这是在我的gulpfile.js中:

gulp.task('useref', function() {
  return gulp.src('app/*.html')
    .pipe(useref())
    .pipe(gulpIf('*.js', uglify()))
    .pipe(gulpIf('*.css', cssnano()))
    .pipe(gulp.dest('dist'))
});

这是它在尝试运行时抛出的堆栈跟踪.C:\ Work\evori-portfolio> gulp useref

[16:32:40] Using gulpfile C:\Work\evori-portfolio\gulpfile.js
[16:32:40] Starting 'useref'...

events.js:141
      throw er; // Unhandled 'error' event
      ^
 Error
    at new JS_Parse_Error (eval at <anonymous> (C:\Work\evori-portfolio\node_modules\uglify-js\tools\node.js:22:1), <anonymous>:1526:18)
    at js_error (eval at <anonymous> (C:\Work\evori-portfolio\node_modules\uglify-js\tools\node.js:22:1), <anonymous>:1534:11)
    at croak (eval at <anonymous> (C:\Work\evori-portfolio\node_modules\uglify-js\tools\node.js:22:1), <anonymous>:2025:9)
    at token_error (eval at <anonymous> (C:\Work\evori-portfolio\node_modules\uglify-js\tools\node.js:22:1), <anonymous>:2033:9)
    at expect_token (eval at <anonymous> (C:\Work\evori-portfolio\node_modules\uglify-js\tools\node.js:22:1), <anonymous>:2046:9)
    at expect (eval at <anonymous> (C:\Work\evori-portfolio\node_modules\uglify-js\tools\node.js:22:1), <anonymous>:2049:36)
    at eval (eval at <anonymous> (C:\Work\evori-portfolio\node_modules\uglify-js\tools\node.js:22:1), <anonymous>:2602:13)
    at eval (eval at <anonymous> (C:\Work\evori-portfolio\node_modules\uglify-js\tools\node.js:22:1), <anonymous>:2072:24)
    at expr_atom (eval at <anonymous> (C:\Work\evori-portfolio\node_modules\uglify-js\tools\node.js:22:1), <anonymous>:2532:35)
    at maybe_unary (eval at <anonymous> (C:\Work\evori-portfolio\node_modules\uglify-js\tools\node.js:22:1), <anonymous>:2708:19)

这个堆栈跟踪对我来说绝对没有任何意义.

我看了堆栈跟踪中列出的所有目的地,但没有发现任何故障.

我认为这可能是由gulp所做的asynchrounus工作造成的.可能uglify插件试图在此时未完成useref文件的uglify.怎么知道的？

所以我分开一切,以确保错误不是由重叠的插件引起的.

这就是我如何重现错误:1.gulp clean:dist

gulp.task('clean:dist', function() {
  return del.sync('dist')
});

2. gulp useref

   gulp.task('useref', function() { return gulp.src('app/*.html') .pipe(useref()) .pipe(gulp.dest('dist')) });

3. 吞了一口气

   gulp.task('minify', function() { return gulp.src('dist/**/*.js') /*.pipe(gulpIf('*.css', cssnano()))*/ .pipe(uglify()) .pipe(gulp.dest('dist')) });

4. 对堆栈跟踪感到疯狂

   C:\Work\evori-portfolio>gulp minify [11:55:50] Using gulpfile C:\Work\evori-portfolio\gulpfile.js [11:55:50] Starting 'minify'...

   events.js:141 throw er; // Unhandled 'error' event ^ Error at new JS_Parse_Error (eval at <anonymous> (C:\Work\evori-portfolio\node_modules\uglify-js\tools\node.js:22:1), <anonymous>:1526:18) at js_error (eval at <anonymous> (C:\Work\evori-portfolio\node_modules\uglify-js\tools\node.js:22:1), <anonymous>:1534:11) at croak (eval at <anonymous> (C:\Work\evori-portfolio\node_modules\uglify-js\tools\node.js:22:1), <anonymous>:2025:9) at token_error (eval at <anonymous> (C:\Work\evori-portfolio\node_modules\uglify-js\tools\node.js:22:1), <anonymous>:2033:9) at expect_token (eval at <anonymous> (C:\Work\evori-portfolio\node_modules\uglify-js\tools\node.js:22:1), <anonymous>:2046:9) at expect (eval at <anonymous> (C:\Work\evori-portfolio\node_modules\uglify-js\tools\node.js:22:1), <anonymous>:2049:36) at eval (eval at <anonymous> (C:\Work\evori-portfolio\node_modules\uglify-js\tools\node.js:22:1), <anonymous>:2602:13) at eval (eval at <anonymous> (C:\Work\evori-portfolio\node_modules\uglify-js\tools\node.js:22:1), <anonymous>:2072:24) at expr_atom (eval at <anonymous> (C:\Work\evori-portfolio\node_modules\uglify-js\tools\node.js:22:1), <anonymous>:2532:35) at maybe_unary (eval at <anonymous> (C:\Work\evori-portfolio\node_modules\uglify-js\tools\node.js:22:1), <anonymous>:2708:19) at expr_ops (eval at <anonymous> (C:\Work\evori-portfolio\node_modules\uglify-js\tools\node.js:22:1), <anonymous>:2743:24) at maybe_conditional (eval at <anonymous> (C:\Work\evori-portfolio\node_modules\uglify-js\tools\node.js:22:1), <anonymous>:2748:20) at maybe_assign (eval at <anonymous> (C:\Work\evori-portfolio\node_modules\uglify-js\tools\node.js:22:1), <anonymous>:2772:20) at expression (eval at <anonymous> (C:\Work\evori-portfolio\node_modules\uglify-js\tools\node.js:22:1), <anonymous>:2791:20) at eval (eval at <anonymous> (C:\Work\evori-portfolio\node_modules\uglify-js\tools\node.js:22:1), <anonymous>:2173:39) at eval (eval at <anonymous> (C:\Work\evori-portfolio\node_modules\uglify-js\tools\node.js:22:1), <anonymous>:2072:24) at block_ (eval at <anonymous> (C:\Work\evori-portfolio\node_modules\uglify-js\tools\node.js:22:1), <anonymous>:2352:20)

编辑确定...我的index.html文件中有大量的.js文件.我试图获取该文件,通过删除每个文件导致错误并尝试运行useref + minify.我明白了 坏文件.当它从index.html中删除时,minify就像魅力一样.但我不知道,我做错了什么或可能导致错误.

'use strict';

angular.module('previewApp')
  .factory('dienstleisterRegObjService', function() {

    /* Aktuell ausgewähltes Produkt */
    var vorselektiertesProdukt = {
      servicetyp: '',
      dienstleistungstyp: '',
      produkt: ''
    };

    /* Registrations Objekt; wird per API an Server übergeben */
    var regObj = {
      organisation: '',
      vorname: '',
      nachname: '',
      mail: '',
      nationalitaet: 'Schweiz',
      sprache: 'Deutsch',
      produkte: []
    };

    /* Reset Methods */
    var getNewVorSelektProd = function() {
      vorselektiertesProdukt.servicetyp = '';
      vorselektiertesProdukt.dienstleistungstyp = '';
      vorselektiertesProdukt.produkt = '';
    };

    var getNewRegObj = function() {
      regObj.organisation = '';
      regObj.vorname = '';
      regObj.nachname = '';
      regObj.mail = '';
      regObj.nationalitaet = 'Schweiz';
      regObj.sprache = 'Deutsch';
      regObj.produkte = [];
    };

    /* Service Objekt */
    return {
      vorselektiertesProdukt,
      regObj,
      addProduct: function(servicetyp, dienstleistungstyp, produktparam) {
          var produkt = {};
          produkt.servicetyp = servicetyp;
          produkt.dienstleistungstyp = dienstleistungstyp;
          produkt.produkt = produktparam;
          regObj.produkte.push(produkt);
      },
      deleteProduct: function(produkt) {
        var index = regObj.produkte.indexOf(produkt);
        regObj.produkte.splice(index, 1);
      },
      resetVorSelektProd: function() {
        getNewVorSelektProd();
      },
      resetRegObj: function() {
        getNewRegObj();
      },
      resetAllObj: function() {
        getNewVorSelektProd();
        getNewRegObj();
      }
    };
  });

Answer 1

如果有人遇到同样的问题，我建议修改 gulp 代码以检查文件导致问题的原因。

去node_modules/gulp-uglify/minifier.js 查找函数：var mangled = trycatch(function () {} 在返回之前写入 console.log(file.path); 保存文件然后重试，您将看到正在处理的文件

错误之前出现在终端中的最后一个文件路径是有错误的文件。

Answer 2

好吧，看来我找到了失败的声明。

我不明白为什么，但当我删除 dienstleisterRegObjService.js 返回对象中的语句时它会起作用：

vorselektiertesProdukt,
regObj,