gulp监听文件变化,并拷贝到指定目录

暂时不支持目录修改、创建、删除
var gulp = require('gulp');
var fs = require('fs');
var path = require('path');
var less = require('gulp-less');
var sass = require('gulp-sass');
var minifycss = require('gulp-minify-css');
var concat = require('gulp-concat');
var uglify = require('gulp-uglify');
var rename = require('gulp-rename');
var del = require('del');
var tinylr = require('tiny-lr');
var server = tinylr();
var port = 1234; // browser-sync
var browserSync = require('browser-sync'); // 创建多层目录
function mkdirs(dirname, mode, callback){
fs.exists(dirname, function (exists){
if(exists){
callback();
}else{
//console.log(path.dirname(dirname));
mkdirs(path.dirname(dirname), mode, function (){
fs.mkdir(dirname, mode, callback);
});
}
});
} // 拷贝文件
function copyfile(oldPath, newPath) {
console.log('复制'+oldPath+' -> '+newPath); var stat = fs.lstatSync(oldPath);
if(stat.isDirectory()) {
console.log(oldPath+'是目录');
return false;
} var readStream = fs.createReadStream(oldPath);
var writeStream = fs.createWriteStream(newPath);
readStream.pipe(writeStream);
readStream.on('end', function () {
console.log('copy end');
});
readStream.on('error', function () {
console.log('copy error');
});
} gulp.task('default', function() { }); gulp.task('css', function() {
return gulp.src('src/*.css') //压缩的文件
.pipe(gulp.dest('target/css')) //输出文件夹
.pipe(minifycss()); //执行压缩
}); // 编译Sass
gulp.task('sass', function() {
gulp.src('./src/css/*.scss')
.pipe(sass())
.pipe(rename({ suffix: '.min' }))
.pipe(minifycss())
.pipe(gulp.dest('target/css'));
}); gulp.task('js', function() {
return gulp.src('./src/js/*.js')
.pipe(gulp.dest('target/js')) //输出main.js到文件夹
.pipe(rename({suffix: '.min'})) //rename压缩后的文件名
.pipe(uglify()) //压缩
.pipe(gulp.dest('target/js')); //输出
}); gulp.task('html', function() {
return gulp.src('./src/*.php')
.pipe(gulp.dest('target/')); //输出
}); // 监听任务 运行语句 gulp watch
gulp.task('watch',function(){
server.listen(port, function(err){
if (err) {
return console.log(err);
} //拷贝修改过的文件
gulp.watch('src/**/**', function(e) {
console.log(e);
var oldPath = e.path;
var newPath = oldPath.replace('\\src\\', '\\target\\');
var newDirPathTemp = newPath.split("\\");
var currentPath = fs.realpathSync('.');
var newDirPath = [];
for(var i = 0; i < newDirPathTemp.length-1; i++) {
newDirPath[i] = newDirPathTemp[i];
}
newDirPath = newDirPath.join("\\");
newDirPath = newDirPath.replace(currentPath, '');
newDirPath = newDirPath.replace(/\\/g, "/");
newDirPath = newDirPath.replace("/", "./");
//console.log('当前路径'+newDirPath); // 修改或增加时
if('added' == e.type || 'changed' == e.type || 'renamed' == e.type) {
// 判断目录是否存在,不存在则创建
fs.exists(newDirPath, function(exists){
if(exists){
//console.log("文件夹存在");
copyfile(oldPath, newPath);
} else {
//console.log("文件夹不存在,则创建目录");
mkdirs(newDirPath); // 延时,等待目录创建完成
setTimeout(function(){
copyfile(oldPath, newPath);
}, 200);
}
});
} else if('deleted' == e.type) { //删除
fs.unlink(newPath, function(err){
console.log('删除'+newPath+err);
});
}
}); // 监听sass
gulp.watch('src/css/*.scss', function(){
gulp.run('sass');
}); // 监听js
gulp.watch('./src/js/*.js', function(){
gulp.run('js');
}); // 监听html
gulp.watch('./src/*.php', function(){
gulp.run('html');
}); }); // 实时同步到浏览器
browserSync.init(['target/css/*', 'target/js/*', 'target/*.html', 'target/*.php'], {
/* 静态服务
server: {
baseDir: "target"
}
*/ // 代理模式
proxy: "dz.com"
}); });

  

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