CODEWITHSUNDEEP
node.jsgulp
chovy
chovy

Reputation: 75686

gulp and promises aren't getting resolved

This example is from the docs, but the task itself does not exit when running from the command line. It runs and finishes, but does NOT return to the shell like every other gulp task I use.

var Q = require('q');

gulp.task('somename', function() {
  var deferred = Q.defer();

  // do async stuff
  setTimeout(function() {
    deferred.resolve();
  }, 1);

  return deferred.promise;
});

How do I get this task to exit back to the shell? I realize I can explicitly called process.exit(0) but this breaks the chainability.

Upvotes: 0

Views: 2562

Answers (2)

Ryan Knell
Ryan Knell

Reputation: 6322

I notice that you dont have a callback in your function but the "Works for me" answer does. When I removed the callback from my function, it did not exit automatically, replicating your problem.

Add a callback... ie:

var Q = require('q');

gulp.task('somename', function(callback) {
  var deferred = Q.defer();

  // do async stuff
  setTimeout(function() {
    deferred.resolve();
  }, 1);

  return deferred.promise;
});

Upvotes: 1

Heikki
Heikki

Reputation: 15417

Works for me, again :)

var gulp = require('gulp');
var Q = require('q');

gulp.task('somename', function(callback) {
    var deferred = Q.defer();
    setTimeout(function() {
        deferred.resolve();
    }, 1);
    return deferred.promise;
});

Results:

∴ gulp somename
[13:35:51] Using gulpfile ~/Desktop/promise-test/gulpfile.js
[13:35:51] Starting 'somename'...
[13:35:51] Finished 'somename' after 1.69 ms
∴

Versions:

∴ node -v
v0.10.33
∴ npm -v
2.1.5
∴ gulp -v
[13:37:34] CLI version 3.8.9
[13:37:34] Local version 3.8.9

Upvotes: 2

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