我继承了一个 Rails 应用程序，我正在尝试让它在production中手动构建
应用程序使用
webpacker-3.5.5Ruby gem 来管理 JavaScript 资产webpack v3.12.0sprockets管理传统 CSS/图像资产的宝石
作为 webpacker gem 配置的一部分，它特别在 JSX/React 资产上使用babel-loader。我不太确定这是做什么的，但我猜这是某种预处理器？
module.exports = {
test: /.jsx?$/,
exclude: /node_modules/,
use: [{
loader: "babel-loader",
options: {
cacheDirectory: true,
// Use .babelrc - not webpack config JS - to define all options
babelrc: true
}
}]
}
当我尝试在生产服务器上运行rake assets:precompile时，它在尝试使用webpack构建资产的步骤中出错
> rake assets:precompile
yarn install v1.17.3
warning package.json: No license field
warning delly@1.0.0: No license field
[1/4] Resolving packages...
success Already up-to-date.
Done in 1.18s.
Webpacker is installed 🎉 🍰
Using /app/config/webpacker.yml file for setting up webpack paths
Compiling…
Compilation failed:
Hash: 27785324c8b2ba6004dd
Version: webpack 3.12.0
Time: 119ms
Asset Size Chunks Chunk Names
manifest.json 2 bytes [emitted]
ERROR in Entry module not found: Error: Can't resolve 'babel-loader' in '/app'
ERROR in Entry module not found: Error: Can't resolve 'babel-loader' in '/app'
这不会发生在本地development，只会发生production.
知道为什么会出错吗？生产中是否需要babel-loader，或者我可以将其完全从生产中删除？
这是我定义软件包安装的package.json：
{
"name": "delly",
"version": "1.0.0",
"scripts": {
"test": "node_modules/.bin/jest --no-cache --config spec/javascript/jest.config.js",
"test:debug": "node --inspect-brk node_modules/.bin/jest --no-cache --config spec/javascript/jest.config.js --colors --verbose"
},
"devDependencies": {
"@babel/cli": "^7.4.4",
"@babel/core": "^7.4.5",
"@babel/plugin-proposal-class-properties": "^7.4.4",
"@babel/plugin-proposal-object-rest-spread": "^7.4.4",
"@babel/plugin-syntax-dynamic-import": "^7.2.0",
"@babel/plugin-transform-modules-commonjs": "^7.4.4",
"@babel/preset-env": "^7.4.5",
"@babel/preset-react": "^7.0.0",
"babel-core": "^7.0.0-bridge.0",
"babel-eslint": "^10.0.1",
"babel-jest": "^24.8.0",
"babel-loader": "^8.0.6",
"babel-plugin-module-resolver": "^3.2.0",
"eslint": "^4.6.1",
"eslint-plugin-jsx-a11y": "^6.0.3",
"eslint-plugin-react": "^7.6.1",
"i18n-js": "^3.2.2",
"jest": "^24.8.0",
"jest-dom": "^3.4.0",
"js-yaml": "^3.13.1",
"react-testing-library": "^7.0.1",
"stylelint": "^9.3.0",
"stylelint-config-rational-order": "^0.0.2",
"webpack-dev-server": "2.11.2"
},
"dependencies": {
"@rails/webpacker": "^3.5.5",
"axios": "^0.19.0",
"core-js": "3",
"html-react-parser": "^0.4.6",
"jquery": "^3.3.1",
"jquery-ujs": "^1.2.2",
"prop-types": "^15.6.1",
"rails-erb-loader": "^5.4.1",
"react": "^16.0.0",
"react-dom": "^16.0.0",
"react-on-rails": "^11.3.0",
"react-toggle-switch": "^3.0.4",
"react-transition-group": "1.x",
"react_ujs": "^2.4.4"
}
}
一个
当你在生产模式下运行rake assets:precompile时，它也使用生产模式运行webpack，在这种情况下，只加载在dependencies中设置的包，如果你查看packages.json，babel-loader设置在devDependencies.\
解决方案是什么？babel-loader移至dependencies