Gulpfile.js加载失败 [英] Gulpfile.js failed to load

问题描述

Visual Studio任务运行程序无法加载gulp文件。我现在使用 VS2017 v15.9.4 ，但是，该项目是几年前开发的。

Visual Studio task runner cannot load the gulp file. I use VS2017 v15.9.4 now, however, the project developed some years ago.

Failed to run "...\Gulpfile.js"...
cmd.exe /c gulp --tasks-simple
assert.js:350
    throw err;
    ^
AssertionError [ERR_ASSERTION]: Task function must be specified
    at Gulp.set [as _setTask] (...\node_modules\undertaker\lib\set-task.js:10:3)
    at Gulp.task (...\node_modules\undertaker\lib\task.js:13:8)
    at Object.<anonymous> (...\gulpfile.js:34:6)
    at Module._compile (internal/modules/cjs/loader.js:689:30)
    at Object.Module._extensions..js (internal/modules/cjs/loader.js:700:10)
    at Module.load (internal/modules/cjs/loader.js:599:32)
    at tryModuleLoad (internal/modules/cjs/loader.js:538:12)
    at Function.Module._load (internal/modules/cjs/loader.js:530:3)
    at Module.require (internal/modules/cjs/loader.js:637:17)
    at require (internal/modules/cjs/helpers.js:22:18)

我将项目的本地地址替换为 ...

I replaced my project local address by "..."

npm -v --> 6.4.1

node -v --> 10.14.2

gulp -v --> CLI version 2.0.1
            Local version 4.0.0

软件包的内容.json 文件：

{
  "version": "1.0.0",
  "name": "tratic",
  "private": true,
  "devDependencies": {
    "gulp": "github:gulpjs/gulp#4.0",
    "gulp-clean-css": "3.5.0",
    "gulp-concat": "2.6.1",
    "gulp-durandal": "1.1.7",
    "gulp-install": "^1.1.0",
    "gulp-uglify": "3.0.0",
    "gulp-util": "3.0.8",
    "rimraf": "2.6.1"
  },
  "dependencies": {
    "assert": "^1.4.1",
    "assert-js": "^0.20.0",
    "natives": "^1.1.5"
  },
  "scripts": {
    "gulp": "./node_modules/gulp/bin/gulp.js"
  }
}

的内容gulpfile.js ：

var gulp = require('gulp'),
    durandal = require('gulp-durandal'),
    rimraf = require('rimraf');

gulp.task('clean', function (cb) {
    rimraf('app/main-built.js', cb);
});

gulp.task('durandal', ['clean'], function () {
    durandal({
        baseDir: 'app',
        main: 'main.js',
        output: 'main-built.js',
        almond: true,
        minify: true
    })
    .pipe(gulp.dest('app'));
});

gulp.task('default', ['durandal']);

我用google搜索，现有解决方案无法解决问题。有一些相关问题，但对我不起作用。

I google it and the existing solutions cannot solve the problem. There are some related issue but does not work for me.

如何解决此问题？

推荐答案

我尝试了您的设置，确实引发了像您一样的错误。
我转到了 gulp文档，并尝试了其版本gulpfile，并且没有任何问题。因此，我重写了您的gulpfile以匹配他们的示例，并且效果很好。
的代码如下：

I have tried your setup, it indeed threw an error like yours. I went to the gulp docs and tried their version of a gulpfile, and it worked with no issues. So I have rewritten your gulpfile to match their example and it worked well. here's the code:

    var gulp = require('gulp'),
        durandal = require('gulp-durandal'),
        rimraf = require('rimraf');

    var paths = {
        app: "./App/**/*.js",
        js: "./Scripts/**/*.js",
        css: "./Content/**/*.css",
        concatJsDest: "./Scripts/vendor-scripts.min.js",
        concatCssDest: "./Content/vendor-css.min.css"
    };

    function clean (cb) {
      rimraf('app/main-built.js', cb);
    }

    gulp.task('clean', clean);

    function runDurandal () {
      return durandal({
          baseDir: 'app',
          main: 'main.js',
          output: 'main-built.js',
          almond: true,
          minify: true,
          rjsConfigAdapter: function (rjsConfig) {
              rjsConfig.deps = ['text'];
              return rjsConfig;
          }
      })
      .pipe(gulp.dest('app'));
    }

    var build = gulp.series(clean, runDurandal);

    gulp.task('default', build);

基本上我已经将用作任务的函数移至变量，并使用系列

Basically I have moved functions that you use as tasks to variables, and used series to run durandal.

然后我试过 npx gulp --tasks-simple
并拥有适当的输出

then I have tried npx gulp --tasks-simple and have a proper output

clean
default

btw，看看 npx ，所以您不要

btw, have a look at npx so you don't have to install gulp globally.

希望有帮助！

这篇关于Gulpfile.js加载失败的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！