在Grunt任务中的节点JS - child_process spawn（'npm install'）导致ENOENT错误 [英] Node JS - child_process spawn('npm install') in Grunt task results in ENOENT error

问题描述

我在创作一个Grunt任务时遇到了一些困难。我尝试执行npm install，然后是bower install，然后是一个grunt中心目标（触发多个子项目的构建命令）。

问题我遇到了child_process的谎言。如果我在我的grunt任务中运行以下命令，并使用当前注释掉的npm install spawn命令，那么会出现产卵ENOENT错误：

  var path = require（'path'），
 projectPath = path.resolve（process.cwd（），this.data.activity）; 
 
 grunt.log.debug（'project path calculated as'，projectPath）; 
 process.chdir（projectPath）; 
 
 console.log（'current dir is：'，process.cwd（））; 
 console.log（'EVN is：'，process.env）; 
 
 var spawnProcess = spawn（'ls'）; 
 // var spawnProcess = spawn（'npm install'）; 
 
 spawnProcess.stdout.on（'data'，function（data）{
 console.log（''+ data）; 
}）; 
 
 spawnProcess.stderr.on（'data'，function（data）{
 
 console.log（'出错了，为'+ path +'安装deps错误： '，data）; 
}）; 
 
 spawnProcess.on（'close'，function（exitCode）{
 
 console.log（'ls已经结束退出代码：'+ exitCode）; 
 }）; 
  

当前的代码（用ls代替npm install）会导致：

 运行install：projects（安装）任务[D]任务源：/Users/zedd45/proj/Gruntfile.js 
验证属性安装.projects存在于配置中... OK 
文件：[no files] 
 [D]项目路径计算方式为：/ Users / zedd45 / proj / activity / web / client 
 current dir is ：/ Users / zedd45 / proj / activity / web / client 
 EVN（简称）是：{
 TERM_PROGRAM：'iTerm.app'，
 SHELL：'/ bin / bash'，
 PWD：'/ Users / zedd45 / proj'，
 ... 
 OLDPWD：'/ Users / zedd45 / proj / activity / web / client'，
 _：'/ usr / local / bin / grunt'} 
 
 GruntFile.js 
 bower.json 
 package.json 
 this_is_the_directory_you_are_looking_for.txt 
 ls已完成Exit代码：0 
  

但是如果我将'ls'更改为'npm install' b``致命错误：产生ENOENT

紧随其后

我试过chmod 777的目录，这似乎没有帮助。

  // var spawnProcess = spawn（'npm install'，{'cwd'：projectPath} ）; 
  

和

  // var spawnProcess = spawn（'npm install'，[]，{'cwd'：projectPath}）; 
  

前者的结果是

警告：Object＃没有方法'slice'使用--force到
continue。

以后仍然会导致ENOENT错误。

任何与ENOENT错误有关的帮助都可能对您有帮助。使用Google搜寻它，或使用子流程API文档，我还没有取得太大的成功。

解决方案

再次检查child_process.spawn上的文档。第一个参数应该是 only 要运行的命令，第二个参数是参数：

  var npm = spawn（'npm'，['install']，{cwd：projectPath}）; 
  

I'm having some difficulty with a Grunt task I'm authoring. I'm trying to execute npm install, followed by bower install, followed by a grunt hub target (to trigger a build command for multiple sub-projects).

The problem I'm encountering lies with child_process. I get spawn ENOENT error if I run the following commands in my grunt task, with the npm install spawn command that's currently commented out:

    var path = require('path'),
        projectPath = path.resolve(process.cwd(), this.data.activity );

        grunt.log.debug('project path computed as: ', projectPath);
        process.chdir( projectPath );

        console.log('current dir is: ', process.cwd());
        console.log('EVN is: ', process.env);

        var spawnProcess = spawn('ls');
        // var spawnProcess = spawn('npm install');

        spawnProcess.stdout.on('data', function (data) {
            console.log('' + data);
        });

        spawnProcess.stderr.on('data', function(data) {

            console.log('something went wrong installing deps for ' + path + '.  Error: ', data);
        });

        spawnProcess.on('close', function (exitCode) {

            console.log( 'ls has finished with Exit Code: ' + exitCode);
        });

the current code (with ls instead of npm install) results in:

   running "install:projects" (install) task[D] Task source: /Users/zedd45/proj/Gruntfile.js
Verifying property install.projects exists in config...OK
File: [no files]
[D] project path computed as:  /Users/zedd45/proj/activity/web/client
current dir is:  /Users/zedd45/proj/activity/web/client
EVN (abbreviated) is:  { 
   TERM_PROGRAM: 'iTerm.app',
   SHELL: '/bin/bash',
   PWD: '/Users/zedd45/proj',
 ...
  OLDPWD: '/Users/zedd45/proj/activity/web/client',
  _: '/usr/local/bin/grunt' }

GruntFile.js
bower.json
package.json
this_is_the_directory_you_are_looking_for.txt
ls has finished with Exit Code: 0

but if I change 'ls' to 'npm install' I get instead ``Fatal error: spawn ENOENT

immediately following the ENV print.

I have tried chmod 777 for that directory, which doesn't seem to help.

I have also tried:

// var spawnProcess = spawn('npm install', {'cwd': projectPath});

and

// var spawnProcess = spawn('npm install', [], {'cwd': projectPath});

The former results in

Warning: Object # has no method 'slice' Use --force to continue.

the later still results in the ENOENT error.

Any help with exactly what this ENOENT error is would probably help a great deal; I haven't had much success with Googling it nor with the child process API docs

解决方案

Double check the docs on child_process.spawn again. The first argument should be only the command to run and the second is the arguments:

var npm = spawn('npm', ['install'], { cwd: projectPath });

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