想象如下场景:项目依赖一个库(比如 path_provider)的版本为 1.6.22,而另一个依赖库也依赖这个 path_provider, 但版本为 0.5.0,那么我最终到底依赖哪个版本,此时执行 flutter pub get 则会出现如下错误:
Running "flutter pub get"in flutter_app...
Because every version of flutter_plugin from path depends on path_provider ^0.5.0 and flutter_app depends on path_provider ^1.6.22, flutter_plugin from path is forbidden. So, because flutter_app depends on flutter_plugin from path, version solving failed. pub get failed (1; So, because flutter_app depends on flutter_plugin from path, version solving failed.) Process finished with exit code 1
此时要解决这个冲突,可以添加 dependency_overrides:
dependency_overrides: path_provider: ^1.6.22
添加此属性后,所有 path_provider 插件都会使用同一个最新版本,使用此字段执行 flutter pub get 则会出现如下警告:
/Users/mengqingdong/project/flutter/bin/flutter --no-color pub get Running "flutter pub get"in flutter_app...
Warning: You are using these overridden dependencies: ! path_provider 1.6.22 Running "flutter pub get"in flutter_app... 0.5s Process finished with exit code 0
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