Bazel root not detected properly when using bzlmod

[dmeijboom]

Expected behavior

Skaffold should recognize the bazel root correctly for projects without a WORKSPACE file (when using bzlmod).

Actual behavior

Skaffold only recognizes WORKSPACE or WORKSPACE.bazel as the bazel root. With bzlmod a workspace file is no longer required while a MODULE or MODULE.bazel file is.

Information

• Skaffold version: v2.10.0
• Operating system: macOs 14.2.1
• Installed via: Homebrew
• Contents of skaffold.yaml:

apiVersion: skaffold/v3
kind: Config
build:
  artifacts:
    - image: test
      bazel:
        target: //test-image.tar

Steps to reproduce the behavior

1. a clonable repository with the sample skaffold project
2. Setup bazel with bzlmod (only a BUILD and MODULE file)
3. skaffold build
4. fail!

[dmeijboom]

Fixed in #9445