@kokojs/plugin-npm-duplicate NPM

Npm Duplicate 插件

@kokojs/plugin-npm-duplicate 用于检测 npm 依赖包是否重复安装了多个版本。

如果白名单内的依赖被安装了多个版本，Npm Duplicate 插件会直接阻止代码编译，直到版本冲突被解决。

使用场景

这个插件的主要用处是避免某些包被重复安装，尤其是单实例的包、体积较大的包。

如果需要全量分析项目中的重复依赖，可以使用 Analyze 插件。

安装

yarn add @kokojs/plugin-npm-duplicate --dev

安装完成后，在 koko.config.js 中添加如下配置：

module.exports = {
  plugins: {
    'npm-duplicate': {
      packages: ['@youzan/znb'],
    },
  },
};

配置项

packages

Type: string[]
Default: []

需要被检测的包列表，如 ['lodash', 'date-fns']。

yarnLockPath

Type: string
Default: 'yarn.lock'

需要检测的 yarnLock 文件所在路径。

常见问题

如何优化重复依赖？

重复依赖有两种情况：

1. semver 可以匹配，但 yarn.lock 中存在多个版本

这种情况一般是在依赖升级过程中 yarn.lock 文件没有正确更新引起的。

直接使用 yarn-deduplicate 这个工具进行合并即可，它会自动将可匹配的版本进行合并。

# 消除所有依赖
npx yarn-deduplicate

# 消除特定重复依赖
npx yarn-deduplicate --packages @youzan/znb,@youzan/utils

2. semver 无法匹配

对于 semver 无法匹配的情况，需要手动修改版本号范围，使之能够匹配。

如果暂时无法修改版本号范围，也可以通过 yarn 提供的 resolutions 字段来指定一个版本号。

// package.json
{
  "resolutions": {
    "@youzan/utils": "^3.0.0"
  }
}

维护者

新春。

@kokojs/shared yarn-deduplicate

@infinitebrahmanuniverse/nolb-_kok @everything-registry/sub-chunk-525 @zalastax/nolb-_kok

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