Gulpfile created for Thinkful Gulp Workshop

gulpfile.js

var gulp = require('gulp');
var changed = require('gulp-changed');
var imagemin = require('gulp-imagemin');
var del = require('del');

gulp.task('minimizeImages', function() {
  return gulp.src('img/*.gif')
          .pipe(changed('build'))
          .pipe(imagemin())
          .pipe(gulp.dest('build'));
});

gulp.task('clean', function(callback) {
  del('*/img', callback);
});

gulp.task('watch', function() {
  gulp.watch('./**/*.gif', ['minimizeImages']);
});

gulp.task('build', ['minimizeImages']);
gulp.task('default', ['build']);