gulpfile.babel.js

import gulp from "gulp";
import {spawn} from "child_process";
import hugo from "hugo-bin";
import gutil from "gulp-util";
import flatten from "gulp-flatten";
import postcss from "gulp-postcss";
import cssImport from "postcss-import";
import cssnext from "postcss-cssnext";
import BrowserSync from "browser-sync";
import webpack from "webpack";
import webpackConfig from "./webpack.conf";
import svgstore from "gulp-svgstore";
import svgmin from "gulp-svgmin";
import inject from "gulp-inject";

const browserSync = BrowserSync.create();

// Hugo arguments
const hugoArgsDefault = ["-d", "../dist", "-s", "site", "-v"];
const hugoArgsPreview = ["--buildDrafts", "--buildFuture"];

// Development tasks
gulp.task("hugo", (cb) => buildSite(cb));
gulp.task("hugo-preview", (cb) => buildSite(cb, hugoArgsPreview));

// Build/production tasks
gulp.task("build", ["css", "js", "svg", "fonts"], (cb) => buildSite(cb, [], "production"));
gulp.task("build-preview", ["css", "js", "svg", "fonts"], (cb) => buildSite(cb, hugoArgsPreview, "production"));

// Compile CSS with PostCSS
gulp.task("css", () => (
  gulp.src("./src/css/*.css")
    .pipe(postcss([cssImport({from: "./src/css/main.css"}), cssnext()]))
    .pipe(gulp.dest("./dist/css"))
    .pipe(browserSync.stream())
));

// Compile Javascript
gulp.task("js", (cb) => {
  const myConfig = Object.assign({}, webpackConfig);

  webpack(myConfig, (err, stats) => {
    if (err) throw new gutil.PluginError("webpack", err);
    gutil.log("[webpack]", stats.toString({
      colors: true,
      progress: true
    }));
    browserSync.reload();
    cb();
  });
});

// Move all fonts into a flattened directory
gulp.task("fonts", () => (
  gulp.src("./src/fonts/**/*")
    .pipe(flatten())
    .pipe(gulp.dest("./dist/fonts"))
    .pipe(browserSync.stream())
));

// Optimize SVG and concatenate into single SVG
gulp.task("svg", () => {
  var svgs = gulp
    .src("./src/svg/icons/*.svg")
    .pipe(svgmin())
    .pipe(svgstore({inlineSvg: true}));

  function fileContents(filePath, file) {
    return file.contents.toString();
  }

  return gulp
    .src("./site/layouts/partials/svg.html")
    .pipe(inject(svgs, {transform: fileContents}))
    .pipe(gulp.dest("./site/layouts/partials/"));
});

// Development server with browsersync
gulp.task("server", ["hugo", "css", "js", "svg", "fonts"], () => {
  browserSync.init({
    server: {
      baseDir: "./dist"
    }
  });
  gulp.watch("./src/js/**/*.js", ["js"]);
  gulp.watch("./src/css/**/*.css", ["css"]);
  gulp.watch("./src/fonts/**/*", ["fonts"]);
  gulp.watch("./src/svg/icons/*.svg", ["svg"]);
  gulp.watch("./site/**/*", ["hugo"]);
});

/**
 * Run hugo and build the site
 */
function buildSite(cb, options, environment = "development") {
  const args = options ? hugoArgsDefault.concat(options) : hugoArgsDefault;

  process.env.NODE_ENV = environment;

  return spawn(hugo, args, {stdio: "inherit"}).on("close", (code) => {
    if (code === 0) {
      browserSync.reload();
      cb();
    } else {
      browserSync.notify("Hugo build failed :(");
      cb("Hugo build failed");
    }
  });
}