gulpfile.js

var gulp = require('gulp'),
  gutil = require('gulp-util'),
  sass = require('gulp-sass'),
  minifyCSS = require('gulp-clean-css'),
  uglify = require('gulp-uglify'),
  concat = require('gulp-concat'),
  rename = require('gulp-rename'),
  webserver = require('gulp-webserver'),
  jshint = require('gulp-jshint'),
  del = require('del');

var appSrcFiles = ['node_modules/jquery/dist/jquery.min.js',
    'node_modules/d3/d3.min.js',
    'node_modules/topojson/build/topojson.min.js',
    'node_modules/queue-async/build/queue.min.js',
    'src/lib/crossfilter.min.js',
    'src/js/og_co_core.js',
    'src/js/og_co_bar.js',
    'src/js/og_co_bio.js',
    'src/js/og_co_map.js',
    'src/js/og_co_menu.js',
    'src/js/og_co_timeline.js',
    'src/js/og_co_main.js',
    'node_modules/materialize-css/dist/js/materialize.min.js'];

var appCssFiles = ['src/css/app.scss'];

var appFontFiles = ['node_modules/materialize-css/dist/fonts/**/*'];

// pipe html + images to build/
gulp.task('html-staging', function() {
  return gulp.src(['src/**/*.html'])
  .pipe(gulp.dest('static/'))
});

gulp.task('img-staging', function() {
  return gulp.src(['static/img/**/*.png',
    'static/img/**/*.jpg',
    'static/img/**/*.eot',
    'static/img/**/*.svg',
    'static/img/**/*.ttf',
    'static/img/**/*.woff'])
    .pipe(gulp.dest('static/img'))
});



// minify css, pipe to build/
gulp.task('scss-staging', function() {
  return gulp.src(appCssFiles)
    .pipe(concat('app.css'))
    .pipe(sass({ includePaths : ['src/css/'] }))
    .pipe(minifyCSS({keepBreaks:true}))
    .pipe(gulp.dest('static/css/'))
});

gulp.task('clean-staging', function () {
  return del([
    'static/*.js'
  ]);
});

// concat + uglify js, pipe to build/
gulp.task('scripts-staging', function() {
  return gulp.src(appSrcFiles)
    .pipe(concat('app.min.js'))
    .pipe(gulp.dest('static/js/'))
});

// concat + uglify js, pipe to build/
gulp.task('data-staging', function() {
  return gulp.src(['src/data/*.json','src/data/*.csv'])
    .pipe(gulp.dest('static/data/'))
});

// concat + uglify js, pipe to build/
gulp.task('font-staging', function() {
  return gulp.src(appFontFiles)
    .pipe(gulp.dest('static/fonts/'))
});




// watch for changes
gulp.task('watch', function() {
  gulp.watch(['src/**/*.html'], ['html-staging']);
  gulp.watch(['src/**/*.scss'], ['scss-staging']);
  gulp.watch(['src/**/*.js'], ['scripts-staging']);
});


// TASKS //

// default task
gulp.task('default', [ 'img-staging', 'scss-staging', 'clean-staging',
   'scripts-staging', 'data-staging', 'font-staging', 'watch']); 

// default task
gulp.task('build', [ 'img-staging', 'scss-staging', 'clean-staging',
   'scripts-staging', 'data-staging', 'font-staging']);