续Gulp使用入门-综合运用>使用Gulp构建一个项目

这是我的文件目录结构图

 下面是我gulpfile.js的配置

'use strict'

var gulp=require('gulp');
var gutil=require('gulp-util');
var uglify=require('gulp-uglify');
var watchPath=require('gulp-watch-path');
var combiner=require('stream-combiner2');
var sourcemaps=require('gulp-sourcemaps');
var minifycss=require('gulp-minify-css');
var autoprefixer=require('gulp-autoprefixer');
var sass=require('gulp-sass');
var imagemin=require('gulp-imagemin');

var handleError=function(err){
    var colors=gutil.colors;
    console.log('\n')
    gutil.log(colors.red('Error!'))
    gutil.log('fileName: ' + colors.red(err.fileName))
    gutil.log('lineNumber: ' + colors.red(err.lineNumber))
    gutil.log('message: ' + err.message)
    gutil.log('plugin: ' + colors.yellow(err.plugin))
}

var combiner=require('stream-combiner2')

gulp.task('gutil',function(){
    gutil.log('message');
    gutil.log(gutil.colors.red('error'))
    gutil.log(gutil.colors.green('message:')+"some")
})
//压缩js
gulp.task('uglifyjs',function(){
    var combined=combiner.obj([
        gulp.src('src/js/**/*.js'),
        sourcemaps.init(),
        uglify(),
        sourcemaps.write('./'),
        gulp.dest('dist/js/')
    ])
    combined.on('error',handleError)
})
//压缩css
gulp.task('minifycss',function(){
    gulp.src('src/css/**/*.css')
        .pipe(sourcemaps.init())
        .pipe(autoprefixer({
                browsers: 'last 2 versions'
        }))
        .pipe(minifycss())
        .pipe(sourcemaps.write('./'))
        .pipe(gulp.dest('dist/css'));
})
//编译scss
gulp.task('sass',function(){
            gulp.src('src/sass/**/*.scss')
            .on('error',function(err){
                console.error('Error!',err.message)
            })
            .pipe(sourcemaps.init())
            .pipe(autoprefixer({
                browsers: 'last 2 versions'
            }))
            .pipe(sass({outputStyle: 'compact'}))
            .pipe(minifycss())
            .pipe(sourcemaps.write('./'))
            .pipe(gulp.dest('dist/css'))
})
//压缩图片
gulp.task('image', function () {
    gulp.src('src/images/**/*')
        .pipe(imagemin({
            progressive: true
        }))
        .pipe(gulp.dest('dist/images'))
})

// gulp.watch('src/js/**/*.js',function(event){
//     console.log(event);
    
//     当修改 src/js/log.js 文件时
//     event {
//         // 发生改变的类型，不管是添加，改变或是删除
//         type: 'changed', 
//         // 触发事件的文件路径
//         path: 'D:/wamp/www/gulpBuildProject/src/js/log.js'
//     }
    
// })

//捕获错误信息
var handleError=function(err){
    var colors=gutil.colors;
    console.log('\n');
    gutil.log(colors.red('Error!'))
    gutil.log('filename: '+colors.red(err.filename))
    gutil.log('lineNumber: '+ colors.red(err.lineNumber))
    gutil.log('message: ' + err.message)
    gutil.log('plugin: ' + colors.yellow(err.plugin))
}

//监听js修改
gulp.task('watchjs',function(){
    gulp.watch('src/js/**/*.js',function(event){
        var paths=watchPath(event,'src/','dist/')

        paths={
            srcPath: 'src/js/log.js',
            srcdir:'src/js/',
            distPath:'dist/js/log.js',
            distDir:'dist/js',
            srcFilename:'log.js',
            distFilename:'log.js'
        }

        gutil.log(gutil.colors.green(event.type)+ ' ' + paths.srcPath)
        gutil.log('Dist '+ paths.distPath)

        var combined=combiner.obj([
            gulp.src(paths.srcPath),
            uglify(),
            gulp.dest(paths.distDir)

        ])
        // gulp.src(paths.srcPath)
        //     .pipe(uglify())
        //     .pipe(gulp.dest(paths.distDir))
        combined.on('error',handleError);
    })
})
//监听css修改
gulp.task('watchcss',function(){
    gulp.watch('src/css/**/*.css',function(event){
        var paths=watchPath(event,'src/','dist/');

        gutil.log(gutil.colors.green(event.type) + ' ' + paths.srcPath)
        gutil.log('Dist ' +paths.distPath)

        gulp.src(paths.srcPath)
            .pipe(sourcemaps.init())
            .pipe(autoprefixer({
                browsers: 'last 2 versions'
            }))
            .pipe(minifycss())
            .pipe(sourcemaps.write('./'))
            .pipe(gulp.dest(paths.distDir));
    })
})
//监听编译sass
gulp.task('watchsass',function(){
    gulp.watch('src/sass/**/*',function(event){
        var paths=watchPath(event,'src/sass/','dist/css/')

        gulp.log(gutil.colors.green(event.type)+ ' ' + paths.srcPath)
        gulp.log('Dist ' + paths.distPath)
        sass(paths.srcPath)
            .on('error',function(err){
                console.error('Error!', err.message);
            })
            .pipe(sourcemaps.init())
            .pipe(sass())
            .pipe(minifycss())
            .pipe(autoprefixer({
                browsers:'last 2 versions'
            }))
            .pipe(sourcemaps.write('./'))
            pipe(gulp.dest(paths.distDir))
    })
})
//监听压缩图片
gulp.task('watchimage', function () {
    gulp.watch('src/images/**/*', function (event) {
        var paths = watchPath(event,'src/','dist/')

        gutil.log(gutil.colors.green(event.type) + ' ' + paths.srcPath)
        gutil.log('Dist ' + paths.distPath)

        gulp.src(paths.srcPath)
            .pipe(imagemin({
                progressive: true
            }))
            .pipe(gulp.dest(paths.distDir))
    })
})

//配置文件复制任务
gulp.task('watchcopy',function(){
    gulp.watch('src/fonts/**/*',function(event){
        var paths=watchPath(event)

        gulp.log(gutil.colors.green(event.type)+ ' ' + paths.srcPath)
        gulp.log('Dist ' + paths.distPath)

        gulp.src(paths.srcPath)
            .pipe(gulp.dest(paths.distDir))

    })
})

gulp.task('copy',function(){
    gulp.src('src/fonts/**/*')
        .pipe(gulp.dest('dist/fonts/'))
})

gulp.task('default',['watchjs','watchcss','watchsass','watchimage','watchcopy'])

 另外以下插件有需要也可以用得上

【gulp-plumber】例外處理

【gulp-livereload】自動重新載入頁面

【gulp-notify】gulp 處理通知

【browser-sync】瀏覽器同步檢視