Turborepo Cache issue with .gitignore'd files

[bryansoftdev]

Verify canary release

• [X] I verified that the issue exists in the latest Turborepo canary release.

Link to code that reproduces this issue

https://github.com/bryansoftdev/turbo-gitignore-issue

What package manager are you using / does the bug impact?

pnpm

What operating system are you using?

Mac

Which canary version will you have in your reproduction?

1.13.0

Describe the Bug

  "pipeline": {
    "build": {
      "dependsOn": ["build-config-file"],
      "inputs": ["$TURBO_DEFAULT$", "config.json"]
    },
    "build-config-file": {
      "cache": false
    }
  },

When executing the build task that depends on the build-config-file task, the build task incorrectly receives a cache hit, even though the build-config-file task has dynamically generated a new and different config.json. This results in the build task using an outdated configuration, ignoring the changes made by the build-config-file task.

The issue appears to be caused by Turbo's inability to cache changes in .gitignore files.

Expected Behavior

The expected behavior is that the dependent task gets a cache miss whenever the upstream task generates a new config.json, even if this file is listed in .gitignore.

To Reproduce

1. pnpm install
2. pnpm exec turbo build
   • config.json is first created by build-config-file
3. rm ./apps/app-1/config.json
   • simulate the repo's initial state
4. pnpm exec turbo build
   • config.json recreated and has different file contents
   • turbo repo shows first config.json's contents even though config.json is listed in inputs & has changed. this should be a cache miss.

Additional context

For now, I removed build-config-file from my build task dependencies, so that I can run the tasks individually & the caching is working as expected.

pnpm exec turbo build-config-file
pnpm exec turbo build

[arlyon]

Hi! Thanks for the report. We're having a look at this now and will report back.

Thanks!

[tknickman]

@bryansoftdev are you seeing the following for the cache hit on build?

cache hit (outputs already on disk)

Also, will your build task have outputs?