CODEWITHSUNDEEP
bowergulp-4
Tyler Graf
Tyler Graf

Reputation: 454

Gulp 4 bower install doesn't trigger finished

I'm using gulp 4. When trying to install bower dependencies using gulp, the bower task never finishes. Both the example below actually install dependencies.

Example 1

var run = require('gulp-run');
gulp.task('bower', function(done) {
  run('./node_modules/.bin/bower install', {cwd: './temp'}).exec(function(err){
    if (err) throw err;

    done();
  });
});

This never finishes. It just hangs.

Example 2

var bower = require('gulp-bower');
gulp.task('bower', function() {
  return bower({cwd: './temp'});
});

This one throws The following tasks did not complete: bower. Did you forget to signal async completion? after it completes. But since it throws, I can't continue my gulp.series.

Upvotes: 0

Views: 418

Answers (1)

Isochronous
Isochronous

Reputation: 1090

You can solve this by using the regular 'bower' package, rather than 'gulp-bower'. There's a programmatic API for bower that can be used with native promises in order to work with Gulp 4.

For example:

var gulp = require('gulp'),
    bower = require('bower');

gulp.task('bower:install', function() {
    return new Promise((resolve) => {
        bower.commands.install(undefined, undefined, {
            cwd: './temp'
        }).on('end', resolve);
    });
});

You'll notice that I'm using ES6 arrow syntax for the anonymous function. You can use ES6 for gulp as long as your gulpfile is named 'gulpfile.babel.js' and you have 'babel-core' installed alongside gulp (local install is fine).

Upvotes: 1

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