gulp silently failing - no errors printed to console

Question

My gulp file is not emitting any errors on either standard gulp methods like gulp.src() with non existant paths nor are stream errors being called by their handler. I've included a simple file that silently fails, printing only the starting.. and finished.. default messages.

var //
  gulp      = require( "gulp" ),
  gulpUtil  = require( "gulp-util" ),
  sass      = require( "gulp-ruby-sass");


 gulp.task( "default", function() {
  gulp.src( "path-that-does-not-exist.scss" )
  .pipe( sass() )
  .on( "error", function( err ) {
    console.log( "this should print" );
  })
  .pipe( gulp.dest( "./client-side/public/compiled" ) );
 });

Answer 1

Okay, so Gulp is working "correctly." But what I'm hearing in your question is that it would be nice if Gulp could just tell you if a file doesn't exist.

I use gulp-expect-file as such

var coffee = require('gulp-coffee');
var expect = require('gulp-expect-file');

gulp.task('mytask', function() {
  var files = ['idontexist.html'];

  return gulp.src(files)
    .pipe(expect(files))
    .pipe(coffee());
});

Now you'll see this in the terminal: