goat: Bring more inline with gulp best practices

Extract non-specific tasks to fns to be more inline with "the gulp way✨"

Fixes #289 (Closes #385)

gulpfile.js

@@ -49,6 +49,49 @@ var styleTask = function (stylesPath, srcs) {
     .pipe($.size({title: stylesPath}));
 };
 
+var jshintTask = function (src) {
+  return gulp.src(src)
+    .pipe($.jshint.extract()) // Extract JS from .html files
+    .pipe($.jshint())
+    .pipe($.jshint.reporter('jshint-stylish'))
+    .pipe($.if(!browserSync.active, $.jshint.reporter('fail')));
+};
+
+var imageOptimizeTask = function (src, dest) {
+  return gulp.src(src)
+    .pipe($.cache($.imagemin({
+      progressive: true,
+      interlaced: true
+    })))
+    .pipe(gulp.dest(dest))
+    .pipe($.size({title: 'images'}));
+};
+
+var optimizeHtmlTask = function (src, dest) {
+  var assets = $.useref.assets({searchPath: ['.tmp', 'app', 'dist']});
+
+  return gulp.src(src)
+    // Replace path for vulcanized assets
+    .pipe($.if('*.html', $.replace('elements/elements.html', 'elements/elements.vulcanized.html')))
+    .pipe(assets)
+    // Concatenate and minify JavaScript
+    .pipe($.if('*.js', $.uglify({preserveComments: 'some'})))
+    // Concatenate and minify styles
+    // In case you are still using useref build blocks
+    .pipe($.if('*.css', $.cssmin()))
+    .pipe(assets.restore())
+    .pipe($.useref())
+    // Minify any HTML
+    .pipe($.if('*.html', $.minifyHtml({
+      quotes: true,
+      empty: true,
+      spare: true
+    })))
+    // Output files
+    .pipe(gulp.dest(dest))
+    .pipe($.size({title: 'html'}));
+};
+
 // Compile and automatically prefix stylesheets
 gulp.task('styles', function () {
   return styleTask('styles', ['**/*.css']);
@@ -60,7 +103,7 @@ gulp.task('elements', function () {
 
 // Lint JavaScript
 gulp.task('jshint', function () {
-  return gulp.src([
+  return jshintTask([
       'app/scripts/**/*.js',
       'app/elements/**/*.js',
       'app/elements/**/*.html',
@@ -74,13 +117,7 @@ gulp.task('jshint', function () {
 
 // Optimize images
 gulp.task('images', function () {
-  return gulp.src('app/images/**/*')
-    .pipe($.cache($.imagemin({
-      progressive: true,
-      interlaced: true
-    })))
-    .pipe(gulp.dest('dist/images'))
-    .pipe($.size({title: 'images'}));
+  return imageOptimizeTask('app/images/**/*', 'dist/images');
 });
 
 // Copy all files at the root level (app)
@@ -125,28 +162,9 @@ gulp.task('fonts', function () {
 
 // Scan your HTML for assets & optimize them
 gulp.task('html', function () {
-  var assets = $.useref.assets({searchPath: ['.tmp', 'app', 'dist']});
-
-  return gulp.src(['app/**/*.html', '!app/{elements,test}/**/*.html'])
-    // Replace path for vulcanized assets
-    .pipe($.if('*.html', $.replace('elements/elements.html', 'elements/elements.vulcanized.html')))
-    .pipe(assets)
-    // Concatenate and minify JavaScript
-    .pipe($.if('*.js', $.uglify({preserveComments: 'some'})))
-    // Concatenate and minify styles
-    // In case you are still using useref build blocks
-    .pipe($.if('*.css', $.cssmin()))
-    .pipe(assets.restore())
-    .pipe($.useref())
-    // Minify any HTML
-    .pipe($.if('*.html', $.minifyHtml({
-      quotes: true,
-      empty: true,
-      spare: true
-    })))
-    // Output files
-    .pipe(gulp.dest('dist'))
-    .pipe($.size({title: 'html'}));
+  return optimizeHtmlTask(
+    ['app/**/*.html', '!app/{elements,test}/**/*.html'],
+    'dist');
 });
 
 // Polybuild will take care of inlining HTML imports,