const path = require('path');

const nodemon = require('gulp-nodemon');

const gulp = require('gulp');

const pump = require('pump');

const uglify = require('gulp-uglify');

const cleanCSS = require('gulp-clean-css');

const babel = require('gulp-babel');

const notifier = require('node-notifier');

const minifyJsSrc = path.join(__dirname, './public/src/js/**/*.js');

const minifyCssSrc = path.join(__dirname, './public/src/css/**/*.css');

/**

* 启动服务器

*/

gulp.task('server', () => {

nodemon({

script: path.join(__dirname, './bin/www'),

ext: 'js pug',

ignore: [path.join(__dirname, './public/**')],

stdout: false

})

.on('readable', function () {

this.stdout.pipe(process.stdout);

this.stderr.pipe(process.stderr);

});

});

/**

* 进行Babel编译并压缩js脚本

*/

gulp.task('minify-js', () => {

pump([

gulp.src(minifyJsSrc),

babel({

presets: ['@babel/env']

}),

uglify(),

gulp.dest(path.join(__dirname, './public/dist/js'))

], err => {

if (err) {

console.error(`源文件可能包含语法错误，导致压缩出错！\n错误信息：${err.message}\n行号：${err.lineNumber}`);

notifier.notify('minify-js任务出错，详情请查看终端。');

} else {

const msg = 'minify-js任务已完成。';

console.info(msg);

notifier.notify(msg);

}

});

});

/**

* 进行css压缩

*/

gulp.task('minify-css', () => {

pump([

gulp.src(minifyCssSrc),

cleanCSS(),

gulp.dest(path.join(__dirname, './public/dist/css'))

], err => {

if (err) {

console.error(`minify-css出错！\n错误信息：${err.message}\n行号：${err.lineNumber}`);

notifier.notify('minify-css任务出错，详情请查看终端。');

} else {

const msg = 'minify-css任务已完成。';

console.info(msg);

notifier.notify(msg);

}

});

});

/**

* 监听资源文件改动并自动执行任务

*/

gulp.task('watch', () => {

gulp.watch(minifyJsSrc, ['minify-js']);

gulp.watch(minifyCssSrc, ['minify-css']);

});

/**

* 默认任务

* 自动启动服务器，并进行一次js和css压缩，并开启文件改动监听

*/

gulp.task('default', ['server', 'minify-js', 'minify-css', 'watch']);