Deploy Google Cloud Functions: GitLab CI/CD Pipeline Config File

.gitlab-ci.yml

# Update Jan 2024
# Deploying Cloud Functions is much simpler than it was 6 years ago.
# I'm leaving the gist in it's original 2018 state for now,
# but skip the the recent comments below for a simpler solution.

variables:
  GCP_ZONE: us-central1-a

stages:
  - npm-install
  - push

npm-install:
  image: node:8-alpine
  stage: npm-install
  only:
    - master
  script:
    - cd replaceWithYourCloudFunction
    - npm install
  artifacts:
    paths:
      - replaceWithYourCloudFunction/node_modules/

push:
  stage: push
  image: docker:latest
  only:
    - master
  dependencies:
    - npm-install
  script:
    # Install CA certs, openssl to https downloads, python for gcloud sdk
    - apk add --update make ca-certificates openssl python
    - update-ca-certificates

    # Download and install Google Cloud SDK
    - wget https://dl.google.com/dl/cloudsdk/release/google-cloud-sdk.tar.gz
    - tar zxvf google-cloud-sdk.tar.gz && ./google-cloud-sdk/install.sh --quiet --usage-reporting=false --path-update=true
    - PATH="google-cloud-sdk/bin:${PATH}"
    - gcloud --quiet components update
    - gcloud components install beta

    # Authenticate using the service account stored here: https://gitlab.com/groups/{YOUR_GITLAB_PROJECT}/-/settings/ci_cd
    - echo $GCLOUD_SERVICE_KEY > ${HOME}/gcloud-service-key.json
    - gcloud auth activate-service-account --key-file ${HOME}/gcloud-service-key.json
  
    # Deploy
    - gcloud beta functions deploy replaceWithYourCloudFunction --source=./replaceWithYourCloudFunction --trigger-http

Finally got it, problem of variable protection, https://gitlab.com/gitlab-com/support-forum/issues/4660 gave me the lead I was missing.

Got working App Engine CI/CD with:

deploy:
  stage: deploy
  image: google/cloud-sdk:alpine
  only:
    - dev
  before_script:
    - echo $FIREBASE_KEY > ${CI_PROJECT_DIR}/key.json
    - echo $GCLOUD_SERVICE_KEY > /tmp/$CI_PIPELINE_ID.json
    - gcloud auth activate-service-account --key-file /tmp/$CI_PIPELINE_ID.json
    - gcloud config set project $CLOUDSDK_CORE_PROJECT
  script:
    - cd ${CI_PROJECT_DIR} 
    - gcloud app deploy
  allow_failure: false

And Gitlab CI/CD conf as:

@linceaerian File variable is the type of Pipeline Variable as shown below:

Content will be same. In that case your variable will hold file path of the temporary file that is autmatically created by Gitlab CI. So you will not need to manually create a file and put the content in it.

@muratcorlu, Thanks a lot, I found it later in the day, i've already switched it for the credential part :)

This was a helpful page if you are not familiar with gcloud deploy https://cloud.google.com/sdk/gcloud/reference/functions/deploy

This + the comments helped me as a template. Thank you so much.