Gulp-sass will not compile to CSS - sass

Question

I'm not able to get grunt-sass to compile to .css. Have seen a load of other similar posts and utilized suggestions but nothing seems to work.
I can get other plugins working fine (for example 'del' to delete stuff, shown here) so it seems my environment is ok, and i can get ordinary vanilla sass compile/watch to work fine.
Here's my setup just in case:
OSX Maverics 10.9.5
$ ruby -v
ruby 2.0.0p481 (2014-05-08 revision 45883) [universal.x86_64-darwin13]
$ sass -v
Sass 3.4.9 (Selective Steve)
$ npm -v
2.1.12
$ brew -v
Homebrew 0.9.5
Here's the project directory structure:
├── index.html
│
├── scss
│ └── base.scss
│ ├── _partial1.scss
│ └── _partial2.scss
│
├── assets
│ └── css
│ └── Nothing yet!
│
├── deltest
│ └── save.txt
│
├── gulpfile.js
│
└── node_modules
└── etc ...
Here's my gulpfile.js:
var gulp = require('gulp');
var sass = require('gulp-sass');
var del = require('del');
gulp.task('gsas', function() {
gulp.src('./scss/base.scss')
.pipe(sass({ includePaths : ['./scss/'] }))
.pipe(gulp.dest('./assets/css'))
});
del(['!deltest/save.txt', 'deltest/delete.txt'], function (err, deletedFiles) {
console.log('Files deleted:', deletedFiles.join(', '));
});
gulp.task('default', function() {
console.log('AAAAAAAAAAAAAAAARGH!');
});
Can anyone see what is wrong here?
UPDATED - with same task silently failing on a windows box:
Here's the gulpfile.js from the windows box test and I'm not even #importing any partials (the dir structure is exactly as shown in the task setup, which i pulled straight from the actual plugin example):
var gulp = require('gulp');
var sass = require('gulp-sass');
var del = require('del');
gulp.task('sass', function () {
gulp.src('./scss/*.scss')
.pipe(sass())
.pipe(gulp.dest('./css'));
});
del(['delete/delete.txt', '!delete/save.txt'], function (err, deletedFiles) {
console.log('Files deleted:', deletedFiles.join(', '));
});
gulp.task('default', function () {
console.log("Made it!");
});
In this example again I'm getting the 'del' task to run fine but gulp-sass fails silently and it's really baffling.

Answer 1

If you want the sass task to execute when you run gulp from the command-line, add it as a dependency of the default task:
gulp.task('default', ['sass'], function() {
//other stuff
});