当我需要使用dev_dependency

问题描述

如果我需要任何依赖关系，可以在dependencies下使用它们

If I need any dependency I use them under dependencies like this

dependencies:
  flutter:
    sdk: flutter
  provider: ^3.2.0
  http: ^0.12.0+3
  get_it: ^3.1.0
  connectivity: ^0.4.6
  email_validator: ^1.0.4
  shared_preferences: ^0.5.4+8
  google_maps_flutter: ^0.5.21+14 

何时可以使用uder dev_dependencies软件包?我不知道要在软件包中看到什么，以便可以确定哪个依赖项属于哪个类别.

When I can use packages uder dev_dependencies? I don't know what I have to see in the packages so that I can decide which dependency goes to which category.

dev_dependencies:

推荐答案

Pub支持两种依赖关系:常规依赖关系和dev_dependencies.开发依赖项与常规依赖项的不同之处在于，您依赖的软件包的dev_dependencies将被忽略.

Pub supports two flavors of dependencies: regular dependencies and dev_dependencies. Dev dependencies differ from regular dependencies in that dev_dependencies of packages you depend on are ignored.

例如:

如果您正在开发一个软件包，并且想要一些仅出于测试目的而不是实际实现的目的导入的软件包，则此类软件包应位于dev_dependencies下.导入软件包时，pub会获取导入的软件包所依赖的每个软件包.由于pub会忽略dev_dependencies，因此pub不会获取用于测试的软件包.

If you are developing a package, and you want some packages which are only imported for testing purpose and not the actual implementation, then such packages should go under dev_dependencies. When you are importing a package, pub gets every package that your imported package depends on. Since pub ignores dev_dependencies, the packages which were used for testing won't be fetched by pub.

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