CODEWITHSUNDEEP
javascriptnode.jsgulp
jdavis
jdavis

Reputation: 2007

using series and parallel tasks in gulp 4.0

I am trying to manipulate text before a file is sent to browserify, and I am attempting to use gulp.series to do this. Here's how:

gulp.task('dev_urls', function() {
  gulp.src([ 'app/index.js' ])
      .pipe(...)
      .pipe(gulp.dest(...))

gulp.task('build_dev',
  gulp.series('dev_urls', 'browserify', gulp.parallel('copy')))

When I execute the build_dev task using gulp build_dev from the command line, I am given this error:

/usr/local/lib/node_modules/gulp/bin/gulp.js:121
    gulpInst.start.apply(gulpInst, toRun);
                  ^

TypeError: Cannot read property 'apply' of undefined
  at /usr/local/lib/node_modules/gulp/bin/gulp.js:121:19
  at doNTCallback0 (node.js:407:9)
  at process._tickDomainCallback (node.js:377:13)
  at Function.Module.runMain (module.js:477:11)
  at startup (node.js:117:18)
  at node.js:951:3

How can I get this to work?

EDIT: I am getting that same error with this file:

var gulp = require('gulp');
gulp.task('build_dev', function() {
  console.log(1);
})

Upvotes: 2

Views: 1855

Answers (1)

eljefedelrodeodeljefe
eljefedelrodeodeljefe

Reputation: 6791

You need to return from your function.

gulp.task('dev_urls', function() {
    return gulp.src([ 'app/index.js' ])
        .pipe()
}

Also make sure that gulp is installed correctly.

$ sudo rm /usr/local/bin/gulp
$ sudo rm -rf /usr/local/lib/node_modules/gulp
$ npm uninstall gulp

$ npm install gulpjs/gulp-cli#4.0 -g

# install Gulp 4 into your project
$ npm install gulpjs/gulp.git#4.0 --save-dev

Upvotes: 2

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