message: feat(bazel): allow passing a custom bazel compiler host to ngc compile
  Enable users to pass a custom Bazel CompilerHost to use for an Angular
  compilation. This supports users who must override the TypeScript
  compiler host.
  PR Close
diff: @@ -145,13 +145,15 @@ export function relativeToRootDirs(filePath: string, rootDirs: string[]): string
  }
  export function compile({allDepsCompiledWithBazel = true, compilerOpts, tsHost, bazelOpts, files,
  - inputs, expectedOuts, gatherDiagnostics}: {
  + inputs, expectedOuts, gatherDiagnostics, bazelHost}: {
  allDepsCompiledWithBazel?: boolean,
  compilerOpts: ng.CompilerOptions,
  tsHost: ts.CompilerHost, inputs?: {[path: string]: string},
  bazelOpts: BazelOptions,
  files: string[],
  - expectedOuts: string[], gatherDiagnostics?: (program: ng.Program) => ng.Diagnostics
  + expectedOuts: string[],
  + gatherDiagnostics?: (program: ng.Program) => ng.Diagnostics,
  + bazelHost?: CompilerHost,
  }): {diagnostics: ng.Diagnostics, program: ng.Program} {
  let fileLoader: FileLoader;
  @@ -244,8 +246,10 @@ export function compile({allDepsCompiledWithBazel = true, compilerOpts, tsHost,
  moduleName, containingFile, compilerOptions, generatedFileModuleResolverHost);
  }
  - const bazelHost = new CompilerHost(
  + if (!bazelHost) {
  + bazelHost = new CompilerHost(
  files, compilerOpts, bazelOpts, tsHost, fileLoader, generatedFileModuleResolver);
  + }
  // Also need to disable decorator downleveling in the BazelHost in Ivy mode.
  if (isInIvyMode) {
  