克隆使用旧 sdk 和包的项目后，如何解决所有 sdk 和依赖项问题？

Question

我克隆了 hackernews 项目，该项目由 google 开发人员在 YouTube 上的 flutter boring 系列节目中开发。运行ning flutter 运行我收到这些错误。


The current Dart SDK version is 2.9.2.                                  
                                                                        
    Because no versions of test match >1.13.0 <1.14.0 and test >=1.16.0-nullsafety requires SDK version >=2.10.0-0 <2.10.0, test >1.13.0 <1.14.0-∞ or >=1.16.0-nullsafety is forbidden.
(1) So, because test >=1.3.0 <1.12.0 depends on boolean_selector ^1.0.0 and test >=1.12.0 <1.13.0 depends on test_api 0.2.14, test >=1.3.0 <1.13.0-∞ or >1.13.0 <1.14.0-∞ or >=1.16.0-nullsafety requires boolean_selector ^1.0.0 or test_api 0.2.14.
                                                                        
    Because test >=1.14.5 <1.15.0 depends on test_api 0.2.16 and test >=1.13.0 <1.14.5 depends on test_api 0.2.15, test >=1.13.0 <1.15.0 requires test_api 0.2.15 or 0.2.16.
    And because test >=1.15.0 <1.15.1 depends on test_core 0.3.8, test >=1.13.0 <1.15.1 requires test_api 0.2.15 or 0.2.16 or test_core 0.3.8.
    And because test >=1.15.1 <1.15.2 depends on test_core 0.3.9 and test >=1.15.2 <1.15.3 depends on test_core 0.3.10, test >=1.13.0 <1.15.3 requires test_core 0.3.8 or 0.3.9 or 0.3.10 or test_api 0.2.15 or 0.2.16.
    And because test >=1.3.0 <1.13.0-∞ or >1.13.0 <1.14.0-∞ or >=1.16.0-nullsafety requires boolean_selector ^1.0.0 or test_api 0.2.14 (1), test >=1.3.0 <1.15.3-∞ or >=1.16.0-nullsafety requires boolean_selector ^1.0.0 or test_api 0.2.14 or 0.2.15 or 0.2.16 or test_core 0.3.8 or 0.3.9 or 0.3.10.
    And because every version of flutter_test from sdk depends on both boolean_selector 2.0.0 and test_api 0.2.17, if flutter_test any from sdk and test >=1.3.0 <1.15.3-∞ or >=1.16.0-nullsafety then test_core 0.3.8 or 0.3.9 or 0.3.10.
(2) So, because test >=1.15.3 <1.16.0-nullsafety depends on test_core 0.3.11 which depends on analyzer ^0.39.5, if flutter_test any from sdk and test >=1.3.0 then analyzer ^0.39.5.
                                                                        
    Because no versions of built_value_generator match >6.5.0 <6.6.0 and built_value_generator >=6.6.0 <6.8.0 depends on analyzer >=0.34.0 <0.37.0, built_value_generator >6.5.0 <6.8.0 requires analyzer >=0.34.0 <0.37.0.
    And because built_value_generator >=6.8.0 <7.0.4 depends on analyzer >=0.34.0 <0.39.0 and built_value_generator 6.5.0 depends on analyzer >=0.33.3 <0.37.0, built_value_generator >=6.5.0 <7.0.4 requires analyzer >=0.33.3 <0.39.0.
    And because if flutter_test any from sdk and test >=1.3.0 then analyzer ^0.39.5 (2), one of flutter_test any from sdk or test >=1.3.0 or built_value_generator >=6.5.0 <7.0.4 must be false.
    And because hn_app depends on built_value_generator ^6.5.0, flutter_test from sdk is incompatible with test >=1.3.0.
    So, because hn_app depends on both test ^1.6.1 and flutter_test any from sdk, version solving failed.
Running "flutter pub get" in hn_app...                                  
pub get failed (1;     So, because hn_app depends on both test ^1.6.1 and
flutter_test any from sdk, version solving failed.)

Answer 1

从 pubspec.yaml 中的依赖项中删除所有版本号，让 Flutter 确定版本

示例：

替换这个

test: ^1.15.0
test_core: 0.3.8

有了这个

test: 
test_core:

Answer 2

出于某种原因，在 dependency_overrides 部分添加分析器解决了这个问题。这是我的 pubspec.yaml 文件的样子：

dev_dependencies:
  build_runner: ^1.4.0
  built_value_generator: ^6.5.0
  moor_generator: ^1.4.0

dependency_overrides:
  analyzer: '0.39.14'

Answer 3

我的问题很相似

就像其他人提到的那样，删除您 pubspec.yahml

中的数字

video_player: ^1.15.0

到

video_player:

然后

flutter pub outdated
flutter pub upgrade --major-versions

克隆使用旧 sdk 和包的项目后，如何解决所有 sdk 和依赖项问题？

How to resolve all the sdk and dependencies issues after cloning a project that was using old sdk and packages?

flutter

flutter-test

flutter-dependencies