Action does not allow uploading single file to a bucket path

TL;DR

I am unable to use this action to upload a single file to a given path in a bucket. It seems like the package only allows specifying a prefix and not a explicit destination path.

E.g. I am unable to achieve the following: /tmp/data.yaml => gs://bucket/.acl/data.yaml

If I try to run the action with the following variables:

uses: google-github-actions/upload-cloud-storage@v1
with:
  path: /tmp/acl.yaml
  destination: bucket/.acl/acl.yaml
  parent: false
  gzip: false
  headers: |-
    content-type: text/yaml

The file is uploaded to: gs://bucket/.acl/acl.yaml/acl.yaml instead of gs://bucket/.acl/acl.yaml

Expected behavior

I would expect that a single file would be uploaded to: gs://bucket/.acl/acl.yaml

Observed behavior

A file is instead uploaded to: gs://bucket/.acl/acl.yaml/acl.yaml

Action YAML

name: upload-gcs
on: [workflow_call]
jobs:
  upload:
    runs-on: ubuntu-latest
    permissions:
      contents: read
      id-token: write
    steps:
    - id: gh-checkout
      uses: actions/checkout@v3
    - id: setup-node
      uses: actions/setup-node@v3

    - id: setup-dependencies
      run: |
        npm install yaml

    - id: parse-acl
      uses: actions/github-script@v6
      with:
        script: |
          // script generates a YAML file with the ACL policy and saves it to /tmp/acl.yaml
          // script also outputs a "acl" output variable with the path to the generated file (/tmp/acl.yaml)

    - id: gcp-authenticate
      uses: google-github-actions/auth@v1
      with:
        workload_identity_provider: [identityProvider] # redacted
        service_account: [serviceAccount] # redacted

    - id: gcp-upload-acl
      uses: google-github-actions/upload-cloud-storage@v1
      with:
        path: ${{ steps.parse-acl.outputs.acl }} # value is /tmp/acl.yaml
        destination: gs://[bucket]/.acl/acl.yaml # bucket name redacted
        parent: false
        gzip: false
        headers: |-
          content-type: text/yaml

Log output

# I am unable to provide the entire log output here, but here's the log specific to this action.

##[debug]Evaluating condition for step: 'Run google-github-actions/upload-cloud-storage@v1'
##[debug]Evaluating: success()
##[debug]Evaluating success:
##[debug]=> true
##[debug]Result: true
##[debug]Starting: Run google-github-actions/upload-cloud-storage@v1
##[debug]Loading inputs
##[debug]Evaluating: steps.parse-acl.outputs.acl
##[debug]Evaluating Index:
##[debug]..Evaluating Index:
##[debug]....Evaluating Index:
##[debug]......Evaluating steps:
##[debug]......=> Object
##[debug]......Evaluating String:
##[debug]......=> 'parse-acl'
##[debug]....=> Object
##[debug]....Evaluating String:
##[debug]....=> 'outputs'
##[debug]..=> Object
##[debug]..Evaluating String:
##[debug]..=> 'acl'
##[debug]=> '/tmp/acl.yaml'
##[debug]Result: '/tmp/acl.yaml'
Run google-github-actions/upload-cloud-storage@v1
  with:
    path: /tmp/acl.yaml
    destination: [bucket]/.acl/acl.yaml
    parent: false
    gzip: false
    headers:
      content-type: text/yaml
    resumable: true
    concurrency: 100
    process_gcloudignore: true
  env:
    CLOUDSDK_AUTH_CREDENTIAL_FILE_OVERRIDE: [redacted]
    GOOGLE_APPLICATION_CREDENTIALS: [redacted]
    GOOGLE_GHA_CREDS_PATH: [redacted]
    CLOUDSDK_CORE_PROJECT: [redacted]
    CLOUDSDK_PROJECT: [redacted]
    GCLOUD_PROJECT: [redacted]
    GCP_PROJECT: [redacted]
    GOOGLE_CLOUD_PROJECT: [redacted]
##[debug]Computed absoluteRoot from "/tmp/acl.yaml" to "/tmp" (isDir: false)
##[debug]Computed computedGlob from "" to "acl.yaml"
##[debug]Found 1 files: ["acl.yaml"]
##[debug]Processing gcloudignore
##[debug]Using .gcloudignore at: /home/runner/work/test-gh-upload/test-gh-upload/.gcloudignore
##[debug]Parsed ignore list: [".git","gha-creds-*.json",".github"]
##[debug]Uploading 1 files: ["acl.yaml"]
##[debug]Computed bucket as "[bucket]"
##[debug]Computed prefix as ".acl/acl.yaml"
::group::Upload files
Upload files
  Uploading /tmp/acl.yaml to gs://[bucket]/.acl/acl.yaml/acl.yaml
  ##[debug]Uploading: {"destination":"[bucket]/.acl/acl.yaml/acl.yaml","metadata":{"contentType":"text/yaml"},"gzip":false,"resumable":true,"configPath":[redacted],"ts":[redacted],"source":"/tmp/acl.yaml"}
  ::endgroup::
##[debug]Node Action run completed with exit code 0
##[debug]Set output uploaded = .acl/acl.yaml/acl.yaml
##[debug]Finishing: Run google-github-actions/upload-cloud-storage@v1

Additional information

This also prevents uploading a static file with a different name. E.g. /tmp/acl.yaml => gs://bucket/.acl/github.yaml

I think the only way to make this work would be:

mkdir -p /tmp/acl
echo "tktktk" > /tmp/acl/github.yaml

Then calling the action with { path: "/tmp/acl", destination: "gs://bucket/.acl/", parent: false }

google-github-actions / upload-cloud-storage