Add skeleton for basic dev tasks in gulpfile

Signed-off-by: João Victor Tozatti Risso <jvtr12@inf.ufpr.br>

gulpfile.babel.js

@@ -2,7 +2,10 @@ const gulp = require('gulp');
 const babel = require('gulp-babel');
 const eslint = require('gulp-eslint');
 
-gulp.task('default', () => {
+/**
+ * Compile source files
+ */
+function compile() {
     // run ESLint
     gulp.src('src/**/*.js')
         .pipe(eslint())
@@ -12,4 +15,23 @@ gulp.task('default', () => {
     gulp.src('src/**/*.js')
         .pipe(babel())
         .pipe(gulp.dest('build'));
+
+    // copy configuration file to build directory
+    gulp.src('config.json')
+        .pipe(gulp.dest('build'));
+
+}
+
+gulp.task('build', compile);
+
+gulp.task('run', ['build'], () => {
 });
+
+gulp.task('watch', [], () => {
+    compile();
+});
+
+gulp.task('test', ['build'], () => {
+});
+
+gulp.task('default', ['watch']);