为什么 Wiredep 在我的 gulp 任务中出现 "dest.on is not a function" 错误?

Why is Wiredep erroring out with "dest.on is not a function" in my gulp task?

我正在尝试在 Gulp 任务中使用 Wiredep 将 Bower 依赖项注入我的 index.html 文件中。以下任务(没有 Wiredep)运行没问题。

gulp.task('build', ['copy', 'assets'], function(){

    return gulp.src('app/index.html')
    .pipe(inject(gulp.src(['dist/assets/js/*.js', 'dist/assets/css/*.css'], {read: false}), {relative: true}))
    .pipe(gulp.dest('dist'));
});

现在我尝试将 Wiredep 添加到其中:

var wiredep = require('wiredep');

gulp.task('build', ['copy', 'assets'], function(){

    return gulp.src('app/index.html')
    .pipe(wiredep())
    .pipe(inject(gulp.src(['dist/assets/js/*.js', 'dist/assets/css/*.css'], {read: false}), {relative: true}))
    .pipe(gulp.dest('dist'));
});

这导致:

[09:45:11] TypeError: dest.on is not a function
    at DestroyableTransform.Readable.pipe (C:\GIT\myApp\myApp-front\node_module
s\gulp-debug\node_modules\through2\node_modules\readable-stream\lib\_stream_read
able.js:533:8)
    at Gulp.<anonymous> (C:\GIT\myApp\myApp-front\gulpfile.js:38:6)
    at module.exports (C:\GIT\myApp\myApp-front\node_modules\gulp\node_modules\
orchestrator\lib\runTask.js:34:7)
    at Gulp.Orchestrator._runTask (C:\GIT\myApp\myApp-front\node_modules\gulp\n
ode_modules\orchestrator\index.js:273:3)
    at Gulp.Orchestrator._runStep (C:\GIT\myApp\myApp-front\node_modules\gulp\n
ode_modules\orchestrator\index.js:214:10)
    at C:\GIT\myApp\myApp-front\node_modules\gulp\node_modules\orchestrator\ind
ex.js:279:18
    at finish (C:\GIT\myApp\myApp-front\node_modules\gulp\node_modules\orchestr
ator\lib\runTask.js:21:8)
    at C:\GIT\myApp\myApp-front\node_modules\gulp\node_modules\orchestrator\lib
\runTask.js:52:4
    at f (C:\GIT\myApp\myApp-front\node_modules\gulp\node_modules\orchestrator\
node_modules\end-of-stream\node_modules\once\once.js:17:25)
    at DestroyableTransform.onend (C:\GIT\myApp\myApp-front\node_modules\gulp\n
ode_modules\orchestrator\node_modules\end-of-stream\index.js:31:18)

我直接 using Wiredep from the command line 试了一下 运行 没问题。 我正在 运行ning Windows,使用 Node v4.2.2。

编辑 如果有人遇到同样的问题,那么解决方法是将任务更改为:

gulp.task('build', ['copy', 'assets'], function(){
    wiredep({src:'dist/index.html'});

    return gulp.src('dist/index.html')
    .pipe(inject(gulp.src(['dist/assets/js/*.js', 'dist/assets/css/*.css'], {read: false}), {relative: true}))
    .pipe(gulp.dest('dist'));
});

注意,index.html 在注入之前被复制到 dist 目录。

我仍然想知道为什么我不能使用流来连接依赖项。

我自己 运行 遇到了这个问题。这是因为您导入 wiredep 的方式。您需要执行以下操作才能将其作为 gulp 流的一部分进行管道传输:

var wiredep = require('wiredep').stream;

排除 .stream 部分允许您使用 wiredep 作为 gulp 流之外的函数。