Assigning the value of a gcloud call to a GitHub actions variable - google-cloud-platform

Question

Objective: To grab the JOB_ID of a unknown running pipeline using gcloud and assign it to a variable to use later for when I drain the pipeline.
run: 'gcloud dataflow jobs list --region us-central1 --status active --filter DataflowToBigtable --format="value(JOB_ID.scope()):"'.
-- this will output something like : DataflowToBigtable0283384848 which is the JOB_ID I want to use. I don't know this value at start and can't assign it from secret. So if my action looks like this....
name: PI-Engine-Deploy
on:
push:
branches: [ develop, feature/deployment-workflow ]
env:
BUCKET_NAME: ret-dev-dataflow
PROJECT_ID: ret-01-dev
REGION: us-central1
PUBSUB_ID: steps.pubsub.outputs.JOB_ID. // I want to assign value here.
jobs:
build:
runs-on: ubuntu-latest
steps:
- uses: actions/checkout#v2
- name: Set up JDK 11
uses: actions/setup-java#v2
with:
java-version: '11'
distribution: 'adopt'
- name: Build with Maven
run: mvn -B package --file pom.xml
- name: Set up Cloud SDK
uses: google-github-actions/setup-gcloud#master
with:
project_id: ${{ secrets.GCP_PROJECT_ID }}
service_account_key: ${{ secrets.GCP_SA_KEY }}
export_default_credentials: true
- name: Use gcloud CLI
run: gcloud info
- name: Install Maven
run: mvn install
## Gets the id for pubsub pipeline
- name: Get the targeted pipelines
id: pubsub
run: 'gcloud dataflow jobs list --region us-central1 --status active --filter DataflowToBigtable --format="value(JOB_ID.scope())"'
- name: Drain Pubsub
run: 'gcloud dataflow jobs drain ${{ PUBSUB_ID }}' ## I want to use the assingned value here.