How to configure Turbo dependencies to only consider task inputs?

[shawmanz32na]

Summary

My specific situation is that, in my monorepo project, I have a project (server-push) that uses tsoa to generate an OpenAPI Spec from the implementation code, and then uses that generated OpenAPI spec to generate clients using openapi-generator. Then, we have other projects in the monorepo that depend on the generated clients. I've attempted to configure Turbo so that clients are only regenerated if there are changes to the OpenAPI Spec, but I'm seeing that whenever the project gets built, the clients are (re)generated, even when the OpenAPI Spec hasn't changed.

Summarizing the dependencies, server-push#build must have been run (to generate the OpenAPI Spec) before server-push#generate can run, and server-push#generate must have been run (to generate the clients) before any of the projects' build goals that use the generated clients can run (because they use the generated clients). But, The clients only need to get regenerated if the OpenAPI Spec changes, regardless of whether server-push#build was run (since it's perfectly valid to make a bug fix or something in that project that doesn't change the API).

Again, what I'm seeing is that server-push#generate will run (not use the cache) any time server-push#build has been run, even if there were no changes to the inputs configured for server-push#generate (and then this leads to all the projects that depend on the generated clients to get built, too, which is a huge time suck).

Here's the relevant part of the server-push project's package.json:

"scripts": {
    "clean": "rimraf ./dist && rimraf ./src/http/{openapi.json,tsoaRoutes.ts} --glob",
    "build": "tsoa spec-and-routes && tsc -p tsconfig.build.json",
    "generate": "openapi-generator-cli generate"
  },

And here's the relevant part of the monorepo's turbo.json:

    "build:war": {
      "dependsOn": ["server-push#generate"],
      "outputs": ["build/libs/*.war"],
      "outputLogs": "new-only"
    },
    "server-push#generate": {
      "dependsOn": ["server-push#build"],
      "inputs": [
        "src/http/openapi.json",
        "openapitools.json",
        ".openapi-generator"
      ],
      "outputs": ["../modules/server-push-osgi-java-client"],
      "outputLogs": "new-only"
    },
    "server-push#build": {
      "outputs": [
        "dist",
        "src/http/openapi.json",
        "src/http/tsoaRoutes.ts"
      ]
    },

And, here's a snippets of the --summarize output for two subsequent runs of turbo run build:war in which I added a comment in one of the source files in server push, which should rightly trigger a rerun of server-push#build, but does not change the generated OpenAPI Spec and should therefore not trigger a re-run of server-push#generate, but, as you can see, the task hash changes even though the hashes of all inputs are identical:

Am I doing something wrong? How can I configure Turbo to actually optimize the build operations correctly?

Additional information

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