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Error when calling logError callback on error

See original GitHub issue

This is a simple task to compile sass to css with sourcemaps:

gulp.task('sass', function () {
    gulp.src(['*.scss'])
        .pipe(sourcemaps.init())
        .pipe(sass().on('error', sass.logError))
        .pipe(sourcemaps.write('./'))
        .pipe(gulp.dest('dist'));
});

I’m getting this error if there is a syntax error on sass file:

/Users/lm/Sites/app/node_modules/gulp-sass/index.js:170
  this.emit('end');
       ^
TypeError: undefined is not a function
    at Function.logError (/Users/lm/Sites/app/node_modules/gulp-sass/index.js:170:8)
    at DestroyableTransform.<anonymous> (/Users/lm/Sites/app/gulpfile.js:109:16)
    at DestroyableTransform.emit (events.js:129:20)
    at onwriteError (/Users/lm/Sites/app/node_modules/gulp-sass/node_modules/through2/node_modules/readable-stream/lib/_stream_writable.js:345:10)
    at onwrite (/Users/lm/Sites/app/node_modules/gulp-sass/node_modules/through2/node_modules/readable-stream/lib/_stream_writable.js:363:5)
    at WritableState.onwrite (/Users/lm/Sites/app/node_modules/gulp-sass/node_modules/through2/node_modules/readable-stream/lib/_stream_writable.js:123:5)
    at afterTransform (/Users/lm/Sites/app/node_modules/gulp-sass/node_modules/through2/node_modules/readable-stream/lib/_stream_transform.js:84:5)
    at TransformState.afterTransform (/Users/lm/Sites/app/node_modules/gulp-sass/node_modules/through2/node_modules/readable-stream/lib/_stream_transform.js:59:12)
    at errorM (/Users/lm/Sites/app/node_modules/gulp-sass/index.js:123:14)
    at Object.callback (/Users/lm/Sites/app/node_modules/gulp-sass/index.js:134:18)

Issue Analytics

State:
Created 8 years ago
Reactions:1
Comments:7

Top GitHub Comments

11reactions

alalondecommented, Aug 26, 2016

I wanted to write a ‘beep’ to the console by creating my own error callback. The trick is to manually bind the logError function:

.pipe(sass({...})
.on('error', function(err) {
  console.error('\x07'); // so it doesn't just fail (literally) silently!
  sass.logError.bind(this)(err);
}))

The syntax is a bit ridiculous, but it works!

0reactions

xzyfercommented, Mar 11, 2018

Closing as stale. There appear to be work arounds.