cos_gpu_driver_builder: allow using default application credentials to access private GCS data

Now cos_gpu_driver_builder can be invoked from a GCE VM using a simple
docker run and from elsewhere using:

```
docker run
-e GOOGLE_APPLICATION_CREDENTIALS=/tmp/keys/creds.json \
-v $GOOGLE_APPLICATION_CREDENTIALS:/tmp/keys/creds.json:ro \
cos_gpu_driver_builder ...
```

Change-Id: I61df0450083838c62926a9882dffae1f1c260b82
Reviewed-on: https://cos-review.googlesource.com/c/cos/tools/+/45087
Reviewed-by: Meena Shanmugam <meenashanmugam@google.com>
Cloud-Build: GCB Service account <228075978874@cloudbuild.gserviceaccount.com>
Tested-by: Arnav Kansal <rnv@google.com>
1 file changed
tree: 8f2b400d17674db22b6d2359da3cfc7669b5590b
  1. coverage/
  2. release/
  3. src/
  4. testing/
  5. .gitignore
  6. BUILD.bazel
  7. cloudbuild.yaml
  8. CONTRIBUTING.md
  9. deps.bzl
  10. go.mod
  11. go.sum
  12. LICENSE
  13. README.md
  14. run_tests.sh
  15. WORKSPACE
README.md

Tools for Container-Optimized OS

This is a repository of various tools developed for Container-Optimized OS. Examples include cos-gpu-installer, cos-toolbox, etc.

See CONTRIBUTING.md for how to contribute.