Javascript 从Angular builder开发服务器中的json文件中选择类似配置的文件替换

在生产浏览器构建的情况下，我能够从json文件加载配置，并使用以下代码传递给angular broswer builder

    import { BuilderContext, createBuilder, BuilderOutput } from "@angular-devkit/architect";
    import { executeBrowserBuilder, Type, OutputHashing } from '@angular-devkit/build-angular';
    import { Observable } from "rxjs";
    import { getOveride } from "../util";
    
    export function buildCustomWebpackBrowser(
      options: any,
      context: BuilderContext
    ): Observable<BuilderOutput> {
      let override: any = loadJSONFile(options.command);
        
      return executeBrowserBuilder({
        aot: true,
        outputPath: "dist",
        index: "src/index.html",
        main: "src/main.browser.ts",
        tsConfig: "src/tsconfig.app.json",
        polyfills: "src/polyfills.ts",
        assets: [
          "src/assets",
          "src/robots.txt",
          "src/manifest.json",
          "src/firebase-messaging-sw.js",
          "src/ngsw.js"
        ],
        optimization: true,
        outputHashing: OutputHashing.All,
        buildOptimizer: true,
        serviceWorker: true,
        fileReplacements: override.fileReplacements
      }, <any>context, {});
    }
    
    
    export default createBuilder<any>(
      buildCustomWebpackBrowser

);

从“@angulardevkit/architect”导入{BuilderContext，createBuilder，BuilderOutput}；
从“@angular devkit/build angular”导入{executeBrowserBuilder，Type，OutputHashing}；
从“rxjs”导入{observeable}；
从“./util”导入{getOveride}；
导出功能BuildCustomWebPackageBrowser(
选项：任何，
上下文：BuilderContext
)：可见{
让覆盖：any=loadJSONFile（options.command）；
返回executeBrowserBuilder({
是的，
输出路径：“dist”，
索引：“src/index.html”，
main：“src/main.browser.ts”，
tsConfig:“src/tsConfig.app.json”，
polyfills:“src/polyfills.ts”，
资产：[
“src/资产”，
“src/robots.txt”，
“src/manifest.json”，
“src/firebase messaging sw.js”，
“src/ngsw.js”
],
优化:对,，
输出输出：输出输出。全部，
buildOptimizer:true，
服务人员：是的，
fileReplacements:override.fileReplacements
}，上下文，{}）；
}
导出默认createBuilder(
BuildCustomWebPackageBrowser
);

但对于dev服务器，如何从文件中加载类似配置的fileReplacements？在ExecuteEvServerBuilder函数中找不到任何要重写的输入