在 flutter 升级的时候，我们需要更新一些依赖库，但是往往会遇到一些第三方库不兼容问题，但报错信息只显示哪些库会冲突，你不知道这个库是在哪个库中所依赖的。

那么这个时候，要找到这些冲突库，我们需要知道库的依赖关系。很幸运，flutter 提供了这个功能。

我们只需要在项目根目录下，即项目 pubspec.yaml 同层目录下，执行：

flutter pub deps

显示结果如下：

Dart SDK 2.18.0-44.1.beta
Flutter SDK 3.1.0
demo 1.1.0+2022060601
|-- add_2_calendar 2.1.3
|   '-- flutter...
|-- flutter_easyrefresh 2.2.2
|   '-- flutter...
|-- flutter_gen_runner 4.1.6
|   |-- build...
|   '-- flutter_gen_core 4.2.1
|       |-- analyzer...
|       |-- args...
|       |-- collection...
|       |-- color 3.0.0
|       |-- dart_style...
|       |-- dartx 1.1.0
|       |   |-- characters...
|       |   |-- collection...
|       |   |-- crypto...
|       |   |-- meta...
|       |   |-- path...
|       |   '-- time 2.1.0
|       |       '-- clock...
|       |-- json_annotation...
|       |-- mime...
|       |-- path...
|       |-- pub_semver...
|       |-- source_span...
|       |-- xml...
|       '-- yaml...
|-- flutter_html 2.2.1
|   |-- chewie 1.3.3
|   |   |-- cupertino_icons...
|   |   |-- flutter...
|   |   |-- provider...
|   |   |-- video_player...
|   |   '-- wakelock...
|   |-- chewie_audio 1.3.0
|   |   |-- cupertino_icons...
|   |   |-- flutter...
|   |   '-- video_player...
|   |-- collection...
|   |-- csslib 0.17.1
|   |   '-- source_span...
|   |-- flutter...
|   |-- flutter_layout_grid 1.0.6
|   |   |-- collection...
|   |   |-- flutter...
|   |   |-- meta...
|   |   '-- quiver...
|   |-- flutter_math_fork...
|   |-- flutter_svg 1.1.0
|   |   |-- flutter...
|   |   |-- meta...
|   |   |-- path_drawing 1.0.0
|   |   |   |-- flutter...
|   |   |   |-- meta...
|   |   |   |-- path_parsing 1.0.0
|   |   |   |   |-- meta...
|   |   |   |   '-- vector_math...
|   |   |   '-- vector_math...
|   |   |-- vector_math...
|   |   '-- xml...
|   |-- html 0.15.0
|   |   |-- csslib...
|   |   '-- source_span...
|   |-- numerus 1.1.1
|   |-- video_player 2.4.2
|   |   |-- flutter...
|   |   |-- html...
|   |   |-- video_player_android 2.3.4
|   |   |   |-- flutter...
|   |   |   '-- video_player_platform_interface...
|   |   |-- video_player_avfoundation 2.3.4
|   |   |   |-- flutter...
|   |   |   '-- video_player_platform_interface...
|   |   |-- video_player_platform_interface 5.1.2
|   |   |   |-- flutter...
|   |   |   '-- plugin_platform_interface...
|   |   '-- video_player_web 2.0.10
|   |       |-- flutter...
|   |       |-- flutter_web_plugins...
|   |       '-- video_player_platform_interface...
|   '-- webview_flutter...
|-- flutter_intl 0.0.1
|   '-- flutter...
|-- flutter_keyboard_visibility 5.2.0
|   |-- flutter...
|   |-- flutter_keyboard_visibility_platform_interface 2.0.0
|   |   |-- flutter...
|   |   |-- meta...
|   |   '-- plugin_platform_interface...
|   |-- flutter_keyboard_visibility_web 2.0.0
|   |   |-- flutter...
|   |   |-- flutter_keyboard_visibility_platform_interface...
|   |   '-- flutter_web_plugins...
|   '-- meta...
|-- flutter_lints 2.0.1
|   '-- lints 2.0.0
|-- flutter_localizations 0.0.0
|   |-- characters...
|   |-- clock...
|   |-- collection...
|   |-- flutter...
|   |-- intl 0.17.0
|   |   |-- clock...
|   |   '-- path...
|   |-- material_color_utilities...
|   |-- meta...
|   |-- path...
|   '-- vector_math...
|-- flutter_math_fork 0.5.0
|   |-- collection...
|   |-- flutter...
|   |-- flutter_svg...
|   |-- meta...
|   |-- provider...
|   '-- tuple...
|-- flutter_opencc 0.0.3
|   '-- flutter...
|-- flutter_picker 2.0.3
|   '-- flutter...
|-- flutter_rating_bar 4.0.1
|   '-- flutter...
|-- flutter_reachability 1.0.0
|   '-- flutter...
|-- flutter_slidable 1.2.1
|   '-- flutter...
|-- flutter_spinkit 5.1.0
|   '-- flutter...
|-- flutter_swiper_null_safety 1.0.2
|   '-- flutter...
|-- flutter_switch 0.3.2
|   '-- flutter...
|-- flutter_test 0.0.0
|   |-- async...
|   |-- boolean_selector 2.1.0
|   |   |-- source_span...
|   |   '-- string_scanner...
|   |-- characters...
|   |-- charcode 1.3.1
|   |-- clock...
|   |-- collection...
|   |-- fake_async 1.3.0
|   |   |-- clock...
|   |   '-- collection...
|   |-- flutter...
|   |-- matcher 0.12.11
|   |   '-- stack_trace...
|   |-- material_color_utilities...
|   |-- meta...
|   |-- path...
|   |-- source_span 1.8.2
|   |   |-- collection...
|   |   |-- path...
|   |   '-- term_glyph...
|   |-- stack_trace...
|   |-- stream_channel 2.1.0
|   |   '-- async...
|   |-- string_scanner...
|   |-- term_glyph 1.2.0
|   |-- test_api 0.4.9
|   |   |-- async...
|   |   |-- boolean_selector...
|   |   |-- collection...
|   |   |-- matcher...
|   |   |-- meta...
|   |   |-- source_span...
|   |   |-- stack_trace...
|   |   |-- stream_channel...
|   |   |-- string_scanner...
|   |   '-- term_glyph...
|   '-- vector_math...
|-- waterfall_flow 3.0.2
|   |-- collection...
|   |-- extended_list_library 3.0.0
|   |   '-- flutter...
|   '-- flutter...
|-- webview_flutter 2.1.2
|   |-- flutter...
|   |-- webview_flutter_android 2.0.15
|   |   |-- flutter...
|   |   '-- webview_flutter_platform_interface...
|   |-- webview_flutter_platform_interface 1.9.0
|   |   |-- flutter...
|   |   |-- meta...
|   |   '-- plugin_platform_interface 2.1.2
|   |       '-- meta...
|   '-- webview_flutter_wkwebview 2.7.5
|       |-- flutter...
|       |-- path...
|       '-- webview_flutter_platform_interface...
'-- wechat_assets_picker 7.3.1
    |-- extended_image...
    |-- flutter...
    |-- photo_manager 2.1.2
    |   '-- flutter...
    |-- provider...
    '-- video_player...

然后我们在从中搜索冲突库，就很容易知道它被哪些库依赖了。