My gulp local workflow

local gulp workflow

npm init to create package.js
create gulpfile.js

Install Local dependecies
npm install --save-dev gulp gulp-autoprefixer gulp-sass gulp-uglify gulp-concat

Write gulp tasks like

const gulp = require('gulp');
const sass = require('gulp-sass');
const uglify = require('gulp-uglify');
const autoprefixer = require('gulp-autoprefixer');
const concat = require('gulp-concat');

gulp.task( 'sass', function(){
   gulp.src('sass/**/*.scss')
        .pipe(sass().on('error', sass.logError))
        .pipe(autoprefixer({
            browsers: ['last 2 versions'],
            cascade: false
        }))
        .pipe(gulp.dest('css'))
});

gulp.task( 'uglify', function(){
   gulp.src('js/dev/*.js')
        .pipe(concat('main.js'))
        .pipe(uglify())
        .pipe(gulp.dest('js/min/'))
});

gulp.task('watch', function() {
    gulp.watch('sass/**/*.scss', ['sass']);
    gulp.watch('js/dev/*.js', ['uglify']);
});