Grunt任务中的节点js-child_process spawn('npm install')导致ENOENT错误

Question

我在创作一个单调的任务时遇到了一些困难。我正在尝试执行npm install，然后是bower install，然后是grunt hub目标（为多个子项目触发构建命令）。

我遇到的问题是child_process。如果在grunt任务中运行以下命令，并且npm install spawn命令当前被注释掉，则会出现spawn ENOENT错误：

    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);
        });

   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

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

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

任何关于这个错误的帮助都可能会有很大的帮助；我在谷歌搜索它和子进程API文档方面都没有取得多大的成功

Answer 1

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

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