我的项目有一个monorepo结构,如下所示:
babel.config.js
a-something
b-something
我的项目的根目录中有babel config文件,以及程序包a-something
和b-something
。内包装中,a-something
我有以下webpack配置:
const path = require('path')
module.exports = {
target: 'node',
entry: './src/index.js',
output: {
filename: 'bundle.js',
path: path.resolve(__dirname, 'build')
},
devtool: 'source-map',
module: {
rules: [
{
test: /\.js?$/,
use: {
loader: 'babel-loader',
options: {
rootMode: 'upward'
}
},
include: [
path.resolve(__dirname, 'src'),
/node_modules\/a-/,
/node_modules\/b-/
]
}
]
}
}
在包中,a-something
我有以下package.json:
{
"name": "a-something",
"version": "1.0.0",
"description": "",
"main": "index.js",
"scripts": {
"prod:build": "webpack --config webpack.config.js",
"prod:start": "node build/bundle.js"
},
"author": "",
"license": "ISC",
"dependencies": {
"express": "^4.16.2",
"graphql": "^14.5.8",
"graphql-request": "^1.8.2",
"graphql-tag": "^2.10.1",
"b-something": "^1.0.0",
"node-fetch": "^2.6.0",
"sitemap": "^5.0.0"
},
"devDependencies": {
"webpack": "3.5.6",
"@babel/polyfill": "7.7.0"
}
}
我的根package.json具有以下依赖关系:
"@babel/cli": "^7.5.5",
"@babel/core": "^7.5.5",
"babel-loader": "8.0.6"
最后,我的Dockerfile内部包a-something
是:
FROM node:10.15.1
COPY ./package.json /src/package.json
ENV PORT 3000
ENV NODE_ENV production
WORKDIR /src
RUN npm install
COPY ./lerna.json /src/lerna.json
COPY ./packages/a-something/package.json /src/packages/a-something/package.json
COPY ./packages/b-something/package.json /src/packages/b-something/package.json
RUN npm run clean
COPY . /src
WORKDIR /src/packages/a-something
RUN npm run prod:build
RUN echo "FINISHED BUILDING!"
EXPOSE ${PORT}
CMD ["npm" , "run", "prod:start"]
当我运行npm run prod: build
并npm run prod: start
成功构建捆绑包时,但是当我构建docker(上下文是根文件夹)时,出现以下npm错误:
ERROR in Entry module not found: Error: Can't resolve 'babel-loader' in '/src/packages/a-something'
npm ERR! code ELIFECYCLE
npm ERR! errno 2
npm ERR! [email protected] prod:build: `webpack --config webpack.config.js`
npm ERR! Exit status 2
npm ERR!
npm ERR! Failed at the [email protected] prod:build script.
我的主机操作系统是macOS Mojave。也许Lerna生成的符号链接在Debian(由node image使用)上的处理方式有所不同?
更新:通过将所有与babel相关的npm软件包从移动devDependencies
到dependencies
根package.json的部分中,解决了该问题。有谁知道为什么这可以解决问题?
正如我在问题的更新部分中提到的那样,解决方案是将所有与babel相关的软件包移动到devDependencies
根package.json的部分。
但是为什么这有帮助呢?
问题是我设置NODE_ENV
为在Dockerfile中生产。如果设置为生产,则npm将不会安装dev依赖项NODE_ENV
。在主机上,我没有这样的变量。@babel/polyfill
根据babel docs的说法,另外还有一个问题:
因为这是一个polyfill(它将在您的源代码之前运行),所以我们需要它是一个依赖项,而不是devDependency
根据文档 @babel/polyfill
,也已弃用,因此更好的解决方案是:
"babel-loader": "8.0.6"
到根package.jsondevDependencies
在a-something
package.json中具有以下内容: "devDependencies": {
"webpack": "3.5.6",
"core-js": "^3.4.7",
"regenerator-runtime": "^0.13.3"
}
import 'core-js/stable'
import 'regenerator-runtime/runtime'
const path = require('path')
module.exports = {
target: 'node',
entry: './src/index.js',
output: {
filename: 'bundle.js',
path: path.resolve(__dirname, 'build')
},
module: {
rules: [
{
test: /\.js?$/,
use: {
loader: 'babel-loader',
options: {
rootMode: 'upward',
presets: [
['@babel/preset-env', {
corejs: 3,
useBuiltIns: 'usage'
}]
]
}
},
include: [
path.resolve(__dirname, 'src'),
/node_modules\/a-/,
/node_modules\/b-/
]
}
]
}
}
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