我的环境：
我用vue-cli初始化了一个新项目“vuetest”，现在我想运行一个webpack服务器。我使用以下命令：
npm run dev
这个命令相当于“webpack-dev-server --open --hot”，这是我的“package.json”文件来检查：
{
"name": "vuetest",
"description": "A Vue.js project",
"version": "1.0.0",
"author": "",
"private": true,
"scripts": {
"dev": "cross-env NODE_ENV=development webpack-dev-server --open --hot",
"build": "cross-env NODE_ENV=production webpack --progress --hide-modules"
},
"dependencies": {
"vue": "^2.3.3"
},
"devDependencies": {
"babel-core": "^6.0.0",
"babel-loader": "^6.0.0",
"babel-preset-env": "^1.5.1",
"cross-env": "^3.2.4",
"css-loader": "^0.25.0",
"file-loader": "^0.9.0",
"vue-loader": "^12.1.0",
"vue-template-compiler": "^2.3.3",
"webpack": "^2.6.1",
"webpack-dev-server": "^2.4.5"
}
}
但是我收到以下错误：
> [email protected] dev /var/www/html/vuetest
> cross-env NODE_ENV=development webpack-dev-server --open --hot
Project is running at http://localhost:8080/
webpack output is served from /dist/
404s will fallback to /index.html
internal/child_process.js:319
throw errnoException(err, 'spawn');
^
Error: spawn EACCES
at exports._errnoException (util.js:1018:11)
at ChildProcess.spawn (internal/child_process.js:319:11)
at Object.exports.spawn (child_process.js:378:9)
at module.exports (/var/www/html/vuetest/node_modules/opn/index.js:75:24)
at reportReadiness (/var/www/html/vuetest/node_modules/webpack-dev-server/bin/webpack-dev-server.js:424:3)
at Server.<anonymous> (/var/www/html/vuetest/node_modules/webpack-dev-server/bin/webpack-dev-server.js:404:4)
at Server.g (events.js:292:16)
at emitNone (events.js:86:13)
at Server.emit (events.js:185:7)
at emitListeningNT (net.js:1284:10)
npm ERR! Linux 3.10.0-514.el7.x86_64
npm ERR! argv "/usr/bin/node" "/usr/bin/npm" "run" "dev"
npm ERR! node v6.10.3
npm ERR! npm v3.10.10
npm ERR! code ELIFECYCLE
npm ERR! [email protected] dev: `cross-env NODE_ENV=development webpack-dev-server --open --hot`
npm ERR! Exit status 1
npm ERR!
npm ERR! Failed at the [email protected] dev script 'cross-env NODE_ENV=development webpack-dev-server --open --hot'.
npm ERR! Make sure you have the latest version of node.js and npm installed.
npm ERR! If you do, this is most likely a problem with the vuetest package,
npm ERR! not with npm itself.
npm ERR! Tell the author that this fails on your system:
npm ERR! cross-env NODE_ENV=development webpack-dev-server --open --hot
npm ERR! You can get information on how to open an issue for this project with:
npm ERR! npm bugs vuetest
npm ERR! Or if that isn't available, you can get their info via:
npm ERR! npm owner ls vuetest
npm ERR! There is likely additional logging output above.
npm ERR! Please include the following file with any support request:
npm ERR! /var/www/html/vuetest/npm-debug.log
这是“npm-debug.log”文件的内容：
0 info it worked if it ends with ok
1 verbose cli [ '/usr/bin/node', '/usr/bin/npm', 'run', 'dev' ]
2 info using [email protected]
3 info using [email protected]
4 verbose run-script [ 'predev', 'dev', 'postdev' ]
5 info lifecycle [email protected]~predev: [email protected]
6 silly lifecycle [email protected]~predev: no script for predev, continuing
7 info lifecycle [email protected]~dev: [email protected]
8 verbose lifecycle [email protected]~dev: unsafe-perm in lifecycle true
9 verbose lifecycle [email protected]~dev: PATH: /usr/lib/node_modules/npm/bin/node-gyp-bin:/var/www/html/vuetest/node_modules/.bin:/usr/local/bin:/usr/bin:/usr/local/sbin:/usr/sbin:/home/bdupre/.local/bin:/home/bdupre/bin
10 verbose lifecycle [email protected]~dev: CWD: /var/www/html/vuetest
11 silly lifecycle [email protected]~dev: Args: [ '-c',
11 silly lifecycle 'cross-env NODE_ENV=development webpack-dev-server --open --hot' ]
12 silly lifecycle [email protected]~dev: Returned: code: 1 signal: null
13 info lifecycle [email protected]~dev: Failed to exec dev script
14 verbose stack Error: [email protected] dev: `cross-env NODE_ENV=development webpack-dev-server --open --hot`
14 verbose stack Exit status 1
14 verbose stack at EventEmitter.<anonymous> (/usr/lib/node_modules/npm/lib/utils/lifecycle.js:255:16)
14 verbose stack at emitTwo (events.js:106:13)
14 verbose stack at EventEmitter.emit (events.js:191:7)
14 verbose stack at ChildProcess.<anonymous> (/usr/lib/node_modules/npm/lib/utils/spawn.js:40:14)
14 verbose stack at emitTwo (events.js:106:13)
14 verbose stack at ChildProcess.emit (events.js:191:7)
14 verbose stack at maybeClose (internal/child_process.js:886:16)
14 verbose stack at Process.ChildProcess._handle.onexit (internal/child_process.js:226:5)
15 verbose pkgid [email protected]
16 verbose cwd /var/www/html/vuetest
17 error Linux 3.10.0-514.el7.x86_64
18 error argv "/usr/bin/node" "/usr/bin/npm" "run" "dev"
19 error node v6.10.3
20 error npm v3.10.10
21 error code ELIFECYCLE
22 error [email protected] dev: `cross-env NODE_ENV=development webpack-dev-server --open --hot`
22 error Exit status 1
23 error Failed at the [email protected] dev script 'cross-env NODE_ENV=development webpack-dev-server --open --hot'.
23 error Make sure you have the latest version of node.js and npm installed.
23 error If you do, this is most likely a problem with the vuetest package,
23 error not with npm itself.
23 error Tell the author that this fails on your system:
23 error cross-env NODE_ENV=development webpack-dev-server --open --hot
23 error You can get information on how to open an issue for this project with:
23 error npm bugs vuetest
23 error Or if that isn't available, you can get their info via:
23 error npm owner ls vuetest
23 error There is likely additional logging output above.
24 verbose exit [ 1, true ]
有谁知道如何解决它吗？
我找到了解决方案。在“package.json”文件中，我替换了：
"dev": "cross-env NODE_ENV=development webpack-dev-server --open --hot"
这样 ：
"dev": "cross-env NODE_ENV=development webpack-dev-server --port 8080 --hot --host 0.0.0.0"
现在一切正常，我的服务器正常启动。
正如Emil所说，这是opn模块的问题，因为xdg-open不可执行。我在使用vue-cli生成的项目中遇到了同样的问题，该项目使用的是opn 5.1.0。
简单地做chmod +x node_modules/opn/xdg-open就能解决这个问题。但每次更新节点模块时，此更改都将丢失。
我最后评论了在build / dev-server.js中打开的调用：
if（autoOpenBrowser && process.env.NODE_ENV！=='testing'）{
//opn(uri)}
并在http://localhost:8080上手动打开我的浏览器
node_modules / opn / xdg-open不可执行，如果你在linux上这就是opn / index.js第75行失败的那个
或者添加这个
console.log(cmd, args, cpOpts);
在node_modules / opn / index.js中的第75行之前，确切地看到哪个命令失败
你能检查你的开发服务器的端口8080是否已被使用？只需在浏览器中点击http://localhost:8080或更改webpack.config.js中的端口，然后重试。我有一个类似的问题，也许就是这样。
检查跟踪日志，这个问题发生在模块opn中，完全在index.js的第75行
Error: spawn EACCES
at exports._errnoException (util.js:1018:11)
at ChildProcess.spawn (internal/child_process.js:319:11)
at Object.exports.spawn (child_process.js:378:9)
at module.exports (/var/www/html/vuetest/node_modules/opn/index.js:75:24)
看着那个文件，我们看到：
50 } else {
51 if (opts.app) {
52 cmd = opts.app;
53 } else {
54 cmd = path.join(__dirname, 'xdg-open');
55 }
56
57 if (appArgs.length > 0) {
58 args = args.concat(appArgs);
59 }
60
61 if (!opts.wait) {
62 // xdg-open will block the process unless
63 // stdio is ignored even if it's unref'd
64 cpOpts.stdio = 'ignore';
65 }
66 }
67
68 args.push(target);
69
70 if (process.platform === 'darwin' && appArgs.length > 0) {
71 args.push('--args');
72 args = args.concat(appArgs);
73 }
74
75 var cp = childProcess.spawn(cmd, args, cpOpts);
可能node正在尝试运行xdg-open这是一个bash脚本，因此需要执行权限。
试试：
chmod a+x xdg-open
或者，如果您在项目的根目录中：
chmod a+x node_modules/opn/xdg-open
PS：通常所有这些文件都具有正确的权限。在一个deseperate情况下，你总是可以删除目录node_modules并再次运行npm install。