结果是我需要使用gulp-rename，并且在'uglification'之前首先输出连接的文件。

var gulp = require('gulp'),
    gp_concat = require('gulp-concat'),
    gp_rename = require('gulp-rename'),
    gp_uglify = require('gulp-uglify');

gulp.task('js-fef', function(){
    return gulp.src(['file1.js', 'file2.js', 'file3.js'])
        .pipe(gp_concat('concat.js'))
        .pipe(gulp.dest('dist'))
        .pipe(gp_rename('uglify.js'))
        .pipe(gp_uglify())
        .pipe(gulp.dest('dist'));
});

gulp.task('default', ['js-fef'], function(){});

来自X1 M1 N1 X，一开始有点混乱，但现在有意义了。我希望它能帮助X1 M2 N1 X新手。
如果您需要源代码Map，下面是更新后的代码：

var gulp = require('gulp'),
    gp_concat = require('gulp-concat'),
    gp_rename = require('gulp-rename'),
    gp_uglify = require('gulp-uglify'),
    gp_sourcemaps = require('gulp-sourcemaps');

gulp.task('js-fef', function(){
    return gulp.src(['file1.js', 'file2.js', 'file3.js'])
        .pipe(gp_sourcemaps.init())
        .pipe(gp_concat('concat.js'))
        .pipe(gulp.dest('dist'))
        .pipe(gp_rename('uglify.js'))
        .pipe(gp_uglify())
        .pipe(gp_sourcemaps.write('./'))
        .pipe(gulp.dest('dist'));
});

gulp.task('default', ['js-fef'], function(){});

请参阅gulp-sourcemaps了解有关选项和配置的更多信息。

更新-2022年2月

现在，使用Gulp 4和Async/Await功能处理构建任务可能会更容易：

// gulpfile.js

const fs = require('fs/promises');
const concat = require('concat');
const uglify = require('uglify-js');

let files_arr = ['file1.js', 'file2.js', 'file3.js'];

async function myGulpTask()
{
    var concat_str,
        uglify_str
    ;

    // concat content
    concat_str = await concat(files_arr);

    // save to file
    await fs.writeFile('concat.js', concat_str, 'utf8');

    // uglify content
    uglify_str = await uglify.minify(concat_str, {mangle:false}).code;

    // save to file
    await fs.writeFile('uglify.js', uglify_str, 'utf8');
}

module.exports = {
    myTask: myGulpTask
};

然后从CLI执行以下操作：

gulp myTask

我的gulp文件生成了一个最终的compiled-bundle-min.js，希望这能对大家有所帮助。

//Gulpfile.js

var gulp = require("gulp");
var watch = require("gulp-watch");

var concat = require("gulp-concat");
var rename = require("gulp-rename");
var uglify = require("gulp-uglify");
var del = require("del");
var minifyCSS = require("gulp-minify-css");
var copy = require("gulp-copy");
var bower = require("gulp-bower");
var sourcemaps = require("gulp-sourcemaps");

var path = {
    src: "bower_components/",
    lib: "lib/"
}

var config = {
    jquerysrc: [
        path.src + "jquery/dist/jquery.js",
        path.src + "jquery-validation/dist/jquery.validate.js",
        path.src + "jquery-validation/dist/jquery.validate.unobtrusive.js"
    ],
    jquerybundle: path.lib + "jquery-bundle.js",
    ngsrc: [
        path.src + "angular/angular.js",
         path.src + "angular-route/angular-route.js",
         path.src + "angular-resource/angular-resource.js"
    ],
    ngbundle: path.lib + "ng-bundle.js",

    //JavaScript files that will be combined into a Bootstrap bundle
    bootstrapsrc: [
        path.src + "bootstrap/dist/js/bootstrap.js"
    ],
    bootstrapbundle: path.lib + "bootstrap-bundle.js"
}

// Synchronously delete the output script file(s)
gulp.task("clean-scripts", function (cb) {
    del(["lib","dist"], cb);
});

//Create a jquery bundled file
gulp.task("jquery-bundle", ["clean-scripts", "bower-restore"], function () {
    return gulp.src(config.jquerysrc)
     .pipe(concat("jquery-bundle.js"))
     .pipe(gulp.dest("lib"));
});

//Create a angular bundled file
gulp.task("ng-bundle", ["clean-scripts", "bower-restore"], function () {
    return gulp.src(config.ngsrc)
     .pipe(concat("ng-bundle.js"))
     .pipe(gulp.dest("lib"));
});

//Create a bootstrap bundled file
gulp.task("bootstrap-bundle", ["clean-scripts", "bower-restore"], function     () {
    return gulp.src(config.bootstrapsrc)
     .pipe(concat("bootstrap-bundle.js"))
     .pipe(gulp.dest("lib"));
});

// Combine and the vendor files from bower into bundles (output to the Scripts folder)
gulp.task("bundle-scripts", ["jquery-bundle", "ng-bundle", "bootstrap-bundle"], function () {

});

//Restore all bower packages
gulp.task("bower-restore", function () {
    return bower();
});

//build lib scripts
gulp.task("compile-lib", ["bundle-scripts"], function () {
    return gulp.src("lib/*.js")
        .pipe(sourcemaps.init())
        .pipe(concat("compiled-bundle.js"))
        .pipe(gulp.dest("dist"))
        .pipe(rename("compiled-bundle.min.js"))
        .pipe(uglify())
        .pipe(sourcemaps.write("./"))
        .pipe(gulp.dest("dist"));
});

使用gulp-uglify、gulp-concat和gulp-sourcemaps的解决方案。这是我正在做的一个项目。

gulp.task('scripts', function () {
    return gulp.src(scripts, {base: '.'})
        .pipe(plumber(plumberOptions))
        .pipe(sourcemaps.init({
            loadMaps: false,
            debug: debug,
        }))
        .pipe(gulpif(debug, wrapper({
            header: fileHeader,
        })))
        .pipe(concat('all_the_things.js', {
            newLine:'\n;' // the newline is needed in case the file ends with a line comment, the semi-colon is needed if the last statement wasn't terminated
        }))
        .pipe(uglify({
            output: { // http://lisperator.net/uglifyjs/codegen
                beautify: debug,
                comments: debug ? true : /^!|\b(copyright|license)\b|@(preserve|license|cc_on)\b/i,
            },
            compress: { // http://lisperator.net/uglifyjs/compress, http://davidwalsh.name/compress-uglify
                sequences: !debug,
                booleans: !debug,
                conditionals: !debug,
                hoist_funs: false,
                hoist_vars: debug,
                warnings: debug,
            },
            mangle: !debug,
            outSourceMap: true,
            basePath: 'www',
            sourceRoot: '/'
        }))
        .pipe(sourcemaps.write('.', {
            includeContent: true,
            sourceRoot: '/',
        }))
        .pipe(plumber.stop())
        .pipe(gulp.dest('www/js'))
});

这将合并并压缩所有的scripts，将它们放入一个名为all_the_things.js的文件中。

//# sourceMappingURL=all_the_things.js.map

它告诉您的浏览器查找该Map文件，并写出该文件。

var gulp = require('gulp');
var concat = require('gulp-concat');
var uglify = require('gulp-uglify');

gulp.task('create-vendor', function () {
var files = [
    'bower_components/q/q.js',
    'bower_components/moment/min/moment-with-locales.min.js',
    'node_modules/jstorage/jstorage.min.js'
];

return gulp.src(files)
    .pipe(concat('vendor.js'))
    .pipe(gulp.dest('scripts'))
    .pipe(uglify())
    .pipe(gulp.dest('scripts'));
});

您解决方案不起作用，因为您需要在concat过程后保存文件，然后进行uglify并再次保存在concat和uglify之间不需要重命名文件

**2015年6月10日：**来自gulp-uglifyjs作者的注解：
**已弃用：**此插件已被列入黑名单，因为它依赖Uglify来连接文件，而不是使用gulp-concat，这打破了“它应该做一件事”的范式。当我创建此插件时，没有办法让源Map与gulp一起工作，但是现在有一个gulp-sourcemaps插件可以实现同样的目标。gulp-uglifyjs仍然工作得很好，并对Uglify的执行提供了非常精细的控制，我只是提醒你现在还有其他选项。
2015年2月18日：gulp-uglify和gulp-concat现在都可以很好地与gulp-sourcemaps配合使用。只需确保为gulp-concat正确设置newLine选项;我推荐\n;。
**原始答案（2014年12月）：**使用gulp-uglifyjs代替。gulp-concat不一定安全; gulp-uglify也不支持源代码Map。下面是我正在做的一个项目的代码片段：

gulp.task('scripts', function () {
    gulp.src(scripts)
        .pipe(plumber())
        .pipe(uglify('all_the_things.js',{
            output: {
                beautify: false
            },
            outSourceMap: true,
            basePath: 'www',
            sourceRoot: '/'
        }))
        .pipe(plumber.stop())
        .pipe(gulp.dest('www/js'))
});

我们正在使用以下配置执行类似操作

var gulp = require('gulp'),
    async = require("async"),
    less = require('gulp-less'),
    minifyCSS = require('gulp-minify-css'),
    uglify = require('gulp-uglify'),
    concat = require('gulp-concat'),
    gulpDS = require("./gulpDS"),
    del = require('del');

// CSS & Less
var jsarr = [gulpDS.jsbundle.mobile, gulpDS.jsbundle.desktop, gulpDS.jsbundle.common];
var cssarr = [gulpDS.cssbundle];

var generateJS = function() {

    jsarr.forEach(function(gulpDSObject) {
        async.map(Object.keys(gulpDSObject), function(key) {
            var val = gulpDSObject[key]
            execGulp(val, key);
        });

    })
}

var generateCSS = function() {
    cssarr.forEach(function(gulpDSObject) {
        async.map(Object.keys(gulpDSObject), function(key) {
            var val = gulpDSObject[key];
            execCSSGulp(val, key);
        })
    })
}

var execGulp = function(arrayOfItems, dest) {
    var destSplit = dest.split("/");
    var file = destSplit.pop();
    del.sync([dest])
    gulp.src(arrayOfItems)
        .pipe(concat(file))
        .pipe(uglify())
        .pipe(gulp.dest(destSplit.join("/")));
}

var execCSSGulp = function(arrayOfItems, dest) {
    var destSplit = dest.split("/");
    var file = destSplit.pop();
    del.sync([dest])
    gulp.src(arrayOfItems)
        .pipe(less())
        .pipe(concat(file))
        .pipe(minifyCSS())
        .pipe(gulp.dest(destSplit.join("/")));
}

gulp.task('css', generateCSS);
gulp.task('js', generateJS);

gulp.task('default', ['css', 'js']);

GulpDS文件示例如下：

{

    jsbundle: {
        "mobile": {
            "public/javascripts/sample.min.js": ["public/javascripts/a.js", "public/javascripts/mobile/b.js"]
           },
        "desktop": {
            'public/javascripts/sample1.js': ["public/javascripts/c.js", "public/javascripts/d.js"]},
        "common": {
            'public/javascripts/responsive/sample2.js': ['public/javascripts/n.js']
           }
    },
    cssbundle: {
        "public/stylesheets/a.css": "public/stylesheets/less/a.less",
        }
}