Yarn: Yarn 坚持安装平台特定的可选依赖项

嗯，等等。 这仅在我从https://github.com/resin-io/etcher运行yarn add etcher-image-write时发生，否则它安装得很好，这很奇怪。

好的，我会在这里重写问题描述，这样原始消息就不会丢失：

我们期待为https://github.com/resin-io/etcher迁移到 Yarn yarn install ，我会得到以下结果：

$ git clone https://github.com/resin-io/etcher
$ yarn install
yarn install v0.19.0
info No lockfile found.
warning npm-shrinkwrap.json found. This will not be updated or respected. See https://yarnpkg.com/en/docs/migrating-from-npm for more information.
[1/4] 🔍  Resolving packages...
warning [email protected]: this package is no longer updated or maintained
warning [email protected]: electron-prebuilt has been renamed to electron. For more details, see http://electron.atom.io/blog/2016/08/16/npm-install-electron
warning file-tail > [email protected]: this package is no longer updated or maintained
warning etcher-image-write > progress-stream > through2 > xtend > [email protected]:
warning electron-packager > asar > mksnapshot > request > [email protected]: use uuid module instead
[2/4] 🚚  Fetching packages...
warning [email protected]: The platform "darwin" is incompatible with this module.
info "[email protected]" is an optional dependency and failed compatibility check. Excluding it from installation.
warning [email protected]: The platform "darwin" is incompatible with this module.
info "[email protected]" is an optional dependency and failed compatibility check. Excluding it from installation.
error [email protected]: The platform "darwin" is incompatible with this module.
error Found incompatible module
info Visit https://yarnpkg.com/en/docs/cli/install for documentation about this command.

我最初虽然这个问题与etcher-image-write ，因为在yarn add etcher-image-write上执行etcher/产生相同的结果，但问题似乎来自removedrive 。

此模块是 Etcher 本身的可选依赖项：

  ...
  "optionalDependencies": {
    "elevator": "^2.1.0",
    "removedrive": "^1.1.1"
  },
  ..

它是一个仅限 Windows 的软件包：

  ...
  "os": [
    "win32"
  ],
  ...

来自原始问题的相同论点成立：

由于removedrive是etcher的可选依赖项，因此如果存在平台不匹配，Yarn 不应抛出错误，而只需将其省略，就像 npm 一样。

我也有这个问题，如下：
https://github.com/alykoshin/winston-winlog3
依赖于一个仅限 Windows 的模块：
https://github.com/alykoshin/node-windows

我们的 package.json 中有以下内容

  "optionalDependencies": {
    "winston-winlog3": "^1.0.6"
  },

错误：
error [email protected]: The platform "darwin" is incompatible with this module.