用自己的实现替换 npm 包 [英] Substitute an npm package with own implementation

问题描述

在我的 package.json 中，我有一个依赖项 "protractor": "2.1.0".该包又依赖于 "jasminewd2": "0.0.5".

In my package.json I have a dependency "protractor": "2.1.0". That package in turn depends on "jasminewd2": "0.0.5".

那个 jasminewd2 包有一些我想修改的行为.我下载了它的源代码并进行了我需要的更改.Yarn 的文档 讲述了使用本地源包的可能性:

That jasminewd2 package has some behavior which I want to modify. I downloaded its sources and made the changes I need. Yarn's documentation tells about a possibility to use a local source for packages:

yarn add file:/path/to/local/folder 安装本地文件系统上的包.这对于测试您尚未发布到注册表的其他包很有用.

yarn add file:/path/to/local/folder installs a package that is on your local file system. This is useful to test out other packages of yours that haven’t been published to the registry.

当我执行那个命令时

1. "jasminewd2": "file:\\CustomNodeModules\\jasminewd2" 被添加到我的 package.json.

2. 这到我的 yarn.lock 文件:

1. "jasminewd2": "file:\\CustomNodeModules\\jasminewd2" gets added to my package.json.

2. And this to my yarn.lock file:

"file:\\CustomNodeModules\\jasminewd2", jasminewd2@0.0.5:
  name jasminewd2
  version "0.0.5"
  resolved "https://registry.yarnpkg.com/jasminewd2
     /-/jasminewd2-0.0.5.tgz#528609a124dfc688c1e3f434a638e047066cd63e"

因此，node_modules/jasminewd2 包含来自 npm 存储库的原始版本.如何让 yarn 安装我的版本?

As a result, node_modules/jasminewd2 contains the original version from the npm repository. How can I make yarn install my version instead?

推荐答案

我相信你的解决方案不起作用，因为 jasminewd2 是一个传递依赖(protractor)和不是直接的.所以当你直接添加它时，传递的不受影响.

I believe your solution doesn't work because jasminewd2 is a transitive dependency (of protractor) and not a direct one. So when you add it directly, the transitive one isn't affected.

您可以使用两种方法解决此问题:

You can work around that using two approaches:

1. 如果您的更改是临时的(用于开发或故障排除)，您应该按照 文档.
2. 否则，您可以分叉 protractor 和 jasminewd2 包并在各自的 package.json 中引用它们.package.jsons 语法是量角器":/".

1. In case your change is temporary (meant for development or troubleshooting), you should yarn link as described in the documentation.
2. Otherwise, you can fork both protractor and jasminewd2 packages and reference them in the respective package.jsons. package.jsons syntax for that is "protractor": "<githubUser>/<githubRepo>".

根据我的经验，第二种方法有一个 npm 缓存形式的警告:您的 git 存储库的 HEAD 仅在 首次安装该依赖项 时被拉取.之后，它会一直缓存并每次都重新安装 - 即使您的存储库的 HEAD 已更改.

From my experience, the second approach has a caveat in the form of npm's cache: your git repo's HEAD is only pulled when that dependency is first installed. After that, it is kept cached and keeps getting reinstalled every time - even when your repo's HEAD has changed.

这就是为什么我通常将提交哈希作为依赖项的一部分引用，如下所示:"dependency": "user/repo.git#aef38fb2adc73304ae1ea87b0d607ad7fadc4d0g".我没有用 yarn 尝试这个技巧，但假设它的行为方式完全相同(通过锁文件设计).

That's why I usually reference a commit hash as part of the dependency like so: "dependency": "user/repo.git#aef38fb2adc73304ae1ea87b0d607ad7fadc4d0g". I didn't try this trick with yarn, but assume it behaves the exact same way (by design via the lockfile).

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