flutter build_runner 耗时太长

Question

我正在使用 EasyLocalization、mobx、JsonSerializable 等来生成 *.g.dart 文件，我正在使用 build_runner watch 或 scripts/build.sh 中的脚本:

flutter packages pub run build_runner build

最多需要 2 秒，但突然开始需要至少 10 秒，有时甚至需要 30 秒。由于这种情况，build_runner watch 变得无用了，我的意思是从那时起它就不能正常工作了。

运行脚本时控制台的输出:

$ sh scripts/build.sh 
[INFO] Generating build script...
[INFO] Generating build script completed, took 611ms

[INFO] Initializing inputs
[INFO] Reading cached asset graph...
[INFO] Reading cached asset graph completed, took 126ms

[INFO] Checking for updates since last build...
[INFO] Checking for updates since last build completed, took 745ms

[INFO] Running build...
[INFO] 1.2s elapsed, 0/16 actions completed.
[INFO] 2.2s elapsed, 0/16 actions completed.
[INFO] 3.3s elapsed, 0/16 actions completed.
[INFO] 12.5s elapsed, 1/17 actions completed.
[INFO] 13.6s elapsed, 4/20 actions completed.
[INFO] Running build completed, took 14.6s

[INFO] Caching finalized dependency graph...
[INFO] Caching finalized dependency graph completed, took 57ms

[INFO] Succeeded after 14.6s with 2 outputs (47 actions)

Answer 1

我最终决定尝试自己解决这个问题，我通过将以下内容添加到我的 pubspec.yaml 中略微改进了它:例如

targets:
  $default:
    builders:
      json_serializable:
        enabled: true
        generate_for:
          include:
            - lib/your_codegen_folder/**.dart
            - lib/**.gen.dart

希望这能为您加快速度。您必须为其他两个生成器添加构建器配置，例如此处的 json_serializable 生成器。我怀疑它们可能指的是 easy_localization 和 mobx？我不知道，我是新手。