copy-webpack-plugin 配置问题

Question

在一个 electron.js 应用程序中，我试图根据这些指示从 node.js 调用和执行 python 脚本：https : //nodejs.org/api/child_process.html#child_process_child_process_execfile_file_args_options_callback

import { execFile } from 'child_process';

let pythonPath = '/home/marco/anaconda3/bin/python3';

execFile('./scripts/factorial.py',
  [parseInt(msg)],
  { cwd: './scripts',
    env: '/home/marco/anaconda3/bin/python3'
  },
  (error, stdout, stderr) => {
    if (error) {
      throw error;
    }
    console.log(stdout);
  }
);

我得到这个错误：

评论options部分时：

execFile('./scripts/factorial.py',
  [parseInt(msg)],
  //{ cwd: './scripts',
    //env: '/home/marco/anaconda3/bin/python3'
  //},
  (error, stdout, stderr) => {
    if (error) {
      throw error;
    }
    console.log(stdout);
  }
);

我犯了同样的错误。

按照此处找到的指示：https : //www.tutorialspoint.com/run-python-script-from-node-js-using-child-process-spawn-method 我修改了代码如下：

const { spawn } = require('child_process');

let nb = parseInt(msg);

function runScript() {
  return spawn ('python3', [
    "-u",
    path.join(__dirname, './scripts/factorial.py'),
    nb,
  ]);
}

const subprocess = runScript();

subprocess.stdout.on('data', (data) => {
  console.log(`data:${data}`);
});

subprocess.stderr.on('data', (data) => {
  console.log(`error:${data}`);
});

subprocess.stderr.on('close', () => {
  console.log("Closed");
});

我收到此错误：

error:python3: can't open file '/home/marco/webMatters/electronMatters
/PythonConnection/.webpack/main/scripts/factorial.py': [Errno 2] No 
such file or directory

Closed

按照此处找到的指示：https ://webpack.js.org/plugins/copy-webpack-plugin/#root 我将 /tools/webpack/webpack.plugins.js 修改为：

 const CopyPlugin = require("copy-webpack-plugin");
module.exports = [
  new ForkTsCheckerWebpackPlugin(),
  new webpack.ExternalsPlugin('commonjs', [
    'electron'
  ]),
  new CopyPlugin({
    patterns: [
      { from: "src/scripts/", to: ".webpack/main/script/" },
    ],
  }),
];

对我来说，它似乎尊重标准，但我收到了这么长的错误消息：

An unhandled error has occurred inside Forge:
compilation.getCache is not a function
TypeError: compilation.getCache is not a function
    at /home/marco/webMatters/electronMatters/PythonConnection
/node_modules/copy-webpack-plugin/dist/index.js:459:33
    at SyncHook.eval (eval at create (/home/marco/webMatters
/electronMatters/PythonConnection/node_modules/tapable
/lib/HookCodeFactory.js:19:10),   <anonymous>:7:1)
at SyncHook.lazyCompileHook (/home/marco/webMatters/electronMatters
/PythonConnection/node_modules/tapable/lib/Hook.js:154:20)
at Compiler.newCompilation (/home/marco/webMatters/electronMatters
/PythonConnection/node_modules/webpack/lib/Compiler.js:630:30)
at /home/marco/webMatters/electronMatters/PythonConnection
/node_modules/webpack/lib/Compiler.js:667:29
at AsyncSeriesHook.eval [as callAsync] (eval at create (/home/marco
/webMatters/electronMatters/PythonConnection/node_modules/tapable
/lib/HookCodeFactory.js:33:10), <anonymous>:6:1)
at AsyncSeriesHook.lazyCompileHook (/home/marco/webMatters
/electronMatters/PythonConnection/node_modules/tapable
/lib/Hook.js:154:20)
at Compiler.compile (/home/marco/webMatters/electronMatters
/PythonConnection/node_modules/webpack/lib/Compiler.js:662:28)
at /home/marco/webMatters/electronMatters/PythonConnection
/node_modules/webpack/lib/Watching.js:77:18
at AsyncSeriesHook.eval [as callAsync] (eval at create (/home/marco
/webMatters/electronMatters/PythonConnection/node_modules/tapable
/lib/HookCodeFactory.js:33:10), <anonymous>:33:1)
at AsyncSeriesHook.lazyCompileHook (/home/marco/webMatters
/electronMatters/PythonConnection/node_modules/tapable
/lib/Hook.js:154:20)
at Watching._go (/home/marco/webMatters/electronMatters
/PythonConnection/node_modules/webpack/lib/Watching.js:41:32)
at /home/marco/webMatters/electronMatters/PythonConnection
/node_modules/webpack/lib/Watching.js:33:9
at Compiler.readRecords (/home/marco/webMatters/electronMatters
/PythonConnection/node_modules/webpack/lib/Compiler.js:529:11)
at new Watching (/home/marco/webMatters/electronMatters
/PythonConnection/node_modules/webpack/lib/Watching.js:30:17)
at Compiler.watch (/home/marco/webMatters/electronMatters
/PythonConnection/node_modules/webpack/lib/Compiler.js:244:10)
error Command failed with exit code 1.

似乎更进一步，但仍有一些问题需要解决

节点版本：v14.5.0 操作系统：Ubuntu 18.04 Desktop

如何解决问题？期待您的帮助

Answer 1

似乎您的问题是您使用的 webpack < 5 和 copy-webpack-plugin 7 不兼容。

做就是了 ：

npm install copy-webpack-plugin@6 --save-dev

要解决这个问题。