当我得到以下错误:
events.js:72
throw er; // Unhandled 'error' event
^
Error: spawn ENOENT
at errnoException (child_process.js:1000:11)
at Process.ChildProcess._handle.onexit (child_process.js:791:34)
我该采取什么程序来修理呢?
作者注:这个错误的许多问题鼓励我发布这个问题，以供将来参考。
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如果你在Windows上，Node.js在处理引号时做了一些有趣的事情，可能会导致你发出一个命令，你知道从控制台工作，但不是在Node中运行。例如，以下应该工作:
spawn('ping', ['"8.8.8.8"'], {});
但失败。有一个神奇的无文档选项windowsVerbatimArguments用于处理引号/类似的东西，似乎可以做到这一点，只要确保在你的opts对象中添加以下内容:
const opts = {
windowsVerbatimArguments: true
};
你的指挥部应该能恢复正常工作了。
spawn('ping', ['"8.8.8.8"'], { windowsVerbatimArguments: true });
如何研究刷出调用引起的错误:
使用NODE_DEBUG=child_process, Credits to @karl-richter。简单，快速，2019年10月
使用包装器来装饰child_process。刷，积分到@jiaji-zhou。简单，快速，2015年1月
漫长的过程，归功于@laconbass。复杂，时间成本，2014年12月
已知的常见原因
Environment issues
The command executable does not exist within the system (dependency not being installed). see prominc's answer
The command executable does not exist within a directory of those specified by PATH environment variable.
The executable binary was compiled with uncompatible libraries. see danilo-ramirez answer
Windows-only bugs/quirks
'.cmd' extension / shell: true. see li-zheng answer
Administrator permisions. see steve's answer
Wrong spawn('command', ['--argument', 'list'], { cwd, env, ...opts }) usage
Specified working directory (opts.cwd) does not exist · see leeroy-brun's answer
Argument list within command String spawn('command --wrong --argument list')
Env vars within command string spawn('ENV_VAR=WRONG command')
Argument list Array specified as String spawn('cmd', '--argument list')
Unset PATH env variable spawn('cmd', [], { env: { variable } } => spawn('cmd', [], { env: { ...process.env, variable } }
ENOENT有两种可能的起源:
您正在编写的代码
您依赖的代码
当源代码是你依赖的代码时，通常的原因是环境问题(或windows怪癖)
我在Windows上遇到了这个问题，用完全相同的命令(省略参数)调用exec和spawn对于exec来说工作得很好(所以我知道我的命令在$PATH上)，但spawn会给出ENOENT。原来我只需要将.exe附加到我正在使用的命令:
import { exec, spawn } from 'child_process';
// This works fine
exec('p4 changes -s submitted');
// This gives the ENOENT error
spawn('p4');
// But this resolves it
spawn('p4.exe');
// Even works with the arguments now
spawn('p4.exe', ['changes', '-s', 'submitted']);
