node.js - Node JS - child_process spawn ('npm install')在 Grunt 任务中导致 ENOENT 错误

Question

我在编写 Grunt 任务时遇到了一些困难。我正在尝试执行 npm install，然后执行 bower install，然后执行 grunt hub 目标(以触发多个子项目的构建命令)。

我遇到的问题在于 child_process。如果我在我的 grunt 任务中运行以下命令，我会收到 spawn ENOENT 错误，使用当前被注释掉的 npm install spawn 命令:

    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);
        });

当前代码(使用 ls 而不是 npm install)导致:

   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

但如果我将“ls”更改为“npm install”，我会得到`` fatal error :生成 ENOENT

紧跟在 ENV 打印之后。

我已经为该目录尝试了 chmod 777，但似乎没有帮助。

我也试过:

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

和

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

前者结果为

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

后者仍然会导致 ENOENT 错误。

任何关于此 ENOENT 错误的确切帮助可能会有很大帮助；我用谷歌搜索和 child process API docs 都没有取得多大成功

Answer 1

再次仔细检查 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 });