Swapping out Grunt for Gulp

gulpfile.js

@@ -0,0 +1,39 @@
+const gulp = require('gulp');
+const sass = require('gulp-sass')(require('sass'));
+const coffee = require('gulp-coffee');
+const sourcemaps = require('gulp-sourcemaps');
+const plumber = require('gulp-plumber');
+
+// Compile .sass files to compressed CSS
+function compileSass() {
+  return gulp.src('assets/styles/**/*.sass')
+    .pipe(plumber())
+    .pipe(sass({ outputStyle: 'compressed' }).on('error', sass.logError))
+    .pipe(gulp.dest('public/css'));
+}
+
+// Compile .coffee files to JavaScript with source maps
+function compileCoffee() {
+  return gulp.src('assets/scripts/*.coffee', { sourcemaps: true })
+    .pipe(plumber())
+    .pipe(coffee({ bare: true }))
+    .pipe(gulp.dest('public/js', { sourcemaps: '.' }));
+}
+
+// Watch files for changes
+function watchFiles() {
+  gulp.watch('assets/styles/**/*.sass', compileSass);
+  gulp.watch('assets/scripts/**/*.coffee', compileCoffee);
+}
+
+// Define default task
+exports.default = gulp.series(
+  gulp.parallel(compileSass, compileCoffee),
+  watchFiles
+);
+
+// one-time build
+exports.build = gulp.parallel(compileSass, compileCoffee);
+
+// start builds with file watching
+exports.watch = watchFiles;