Gulpfile for Jekyll - BrowserSync, Sass, & Autoprefixer.

jekyll-gulpfile.js

var gulp            = require('gulp');
var browserSync     = require('browser-sync');
var sass            = require('gulp-sass');
var prefix          = require('gulp-autoprefixer');
var cp              = require('child_process');

var messages        = { jekyllBuild: '<span style="color: grey">Running:</span> $ jekyll build' };


//  Build the Jekyll Site

gulp.task('jekyll-build', function (done) {
    browserSync.notify(messages.jekyllBuild);
    return cp.spawn('jekyll', ['build'], {stdio: 'inherit'})
        .on('close', done);
});


//  Rebuild Jekyll & do page reload

gulp.task('jekyll-rebuild', ['jekyll-build'], function () {
    browserSync.reload();
});


//  Wait for jekyll-build, then launch the Server

gulp.task('browser-sync', ['sass', 'jekyll-build'], function() {
    browserSync({
        server: {
            baseDir: '_site'
        }
    });
});


//  Compile files from _scss into both _site/css (for live injecting) and site (for future jekyll builds)

gulp.task('sass', function () {
    return gulp.src('css/style.scss')
        .pipe(sass({
            includePaths: ['css'],
            onError: browserSync.notify
        }))
        .pipe(prefix(['last 15 versions', '> 1%', 'ie 8', 'ie 7'], { cascade: true }))
        .pipe(gulp.dest('_site/css'))
        .pipe(browserSync.reload({stream:true}))
        .pipe(gulp.dest('css'));
});



//  Watch scss and jade files for changes & recompile
//  Watch html/md files, run jekyll & reload BrowserSync

gulp.task('watch', function () {
    gulp.watch('css/**', ['sass']);
    gulp.watch(['index.html', '*.html', '_includes/*.html', '_layouts/*.html', '_posts/**', 'pages/**'],['jekyll-rebuild']);
});


//  Default task, running just `gulp` will compile the sass,
//  compile the jekyll site, launch BrowserSync & watch files.

gulp.task('default', ['browser-sync', 'watch']);