Flutter build_runner build构建命令的一些杂症

在开篇之前先把json_serializable的生成命令放上去:

一次性生成

flutter packages pub run build_runner build

持续生成

flutter packages pub run build_runner watch

报错日志

[INFO] Checking for unexpected pre-existing outputs....
[INFO] Found 14 declared outputs which already exist on disk. This is likely because the`.dart_tool/build` folder was deleted, or you are submitting generated files to your source repository.
[SEVERE] Conflicting outputs were detected and the build is unable to prompt for permission to remove them. These outputs must be removed manually or the build can be run with `--delete-conflicting-o
utputs`. The outputs are: lib/data/http/rsp/BaseRsp.g.dart

[INFO] Generating build script...
[INFO] Generating build script completed, took 246ms
[SEVERE] Nothing can be built, yet a build was requested.
pub finished with exit code 78

引发的原因

原因其实日志也说明了。我在提交代码的时候把flutter packages pub run build_runner build生成的xxxx.g.dart也提了上去。运行flutter packages pub run build_runner build不光生成了xxxx.g.dart。同时还成了一个dart_tool/build目录,入过程所说的只运行app是没有问题的,之前xxxx.g.dart还是可用的。但是再生成新的xxxx.g.dart因为缺少之前生成dart_tool/build目下的文件就会报错。

because the`.dart_tool/build` folder was deleted, or you are submitting generated files to your source repository

解决

命令行运行:

//清除之前生成的文件,如果直接运行下面的不行。可以先尝试运行这个
 flutter packages pub run build_runner clean
//可以直接运行这个
 flutter packages pub run build_runner build --delete-conflicting-outputs
当然解决问题的根本方法还是提代码的时候不要将生成的文件也提交到远程仓库


原文:https://juejin.im/post/5c3d9a38e51d451d200e1fa9

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原文地址《Flutter build_runner build构建命令的一些杂症
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