.gitlab-ci.yml

stages:
  - build
  - deploy_staging
  - build_production
  - deploy_production

# Cache dependencies across jobs only pulling not uploading (upload to cache
# happens in build stage)
cache:
  untracked: true
  key: ${CI_COMMIT_REF_SLUG}
  policy: pull # only pull cache, skip uploading
  paths:
    - node_modules/

# Install dependencies for React App. 
# Script run before all stages unless otherwise overriden
before_script:
  - CYPRESS_INSTALL_BINARY=0 npm i
  - npm i firebase-tools@6.1.0 firebase-ci@next

# Build Stage
# Installs dependencies, builds app, and saves results for later (artifacts).
# 1. Install dependencies for React App and Cloud Functions. Installing of
# cypress binary is skipped (done in E2E Testing Stage)
# 2. Build environment specific config file in src/config.js
# 3. Confirm there is no lint within code (after config is injected for import linting)
# 4. Build React app to dist folder
# 5. Preserve build results and dependencies for future jobs in the pipeline
Build:
  stage: build
  image: node:8
  when: always
  except:
    variables:
      - $CI_COMMIT_MESSAGE =~ /skip-build/
  artifacts:
    expire_in: 2 weeks
    when: always
    paths:
      - dist
      - functions/dist
      - node_modules/
      - functions/node_modules/
  # Override cache behavior set above since we want to both pull and push to
  # the cache (no "policy" provided since pull-push is default)
  cache:
    untracked: true # track files that are untracked in git
    key: ${CI_COMMIT_REF_SLUG}
    paths:
      - node_modules/
      - functions/node_modules/
  script:
    - npm run build:config # create env specific src/config.js
    - npm run lint
    - npm run build
    - npm run build:functions

# Deploy Staging
# Deploy React App and Cloud Functions
Deploy Staging:
  stage: deploy_staging
  image: node:8
  environment:
    name: staging
    url: https://material-stage.firebaseapp.com
  when: on_success
  only:
    - master
    - web
  except:
    variables:
      - $CI_COMMIT_MESSAGE =~ /skip-deploy/
      - $CI_COMMIT_MESSAGE =~ /skip-stage-deploy/
  artifacts:
    name: "$CI_JOB_STAGE-$CI_COMMIT_REF_SLUG"
    expire_in: 1 weeks
    when: on_failure
    paths:
      - firebase-debug.log
  dependencies:
    - Build
  script:
    - npm run deploy

# Build Production version of bundle (has different config)
Build Production:
  stage: build_production
  image: node:8
  when: on_success
  only:
    - master
    - prod
    - web
  except:
    variables:
      - $CI_COMMIT_MESSAGE =~ /skip-deploy/
      - $CI_COMMIT_MESSAGE =~ /skip-prod-deploy/
  artifacts:
    name: "$CI_JOB_STAGE-$CI_COMMIT_REF_SLUG"
    expire_in: 1 week
    when: always
    paths:
      - dist
  script:
    - npm run clean # remove existing dist folder
    - npm run build:config # create env specific src/config.js
    - npm run build # rebuild bundle with new config
    # Note: Functions are not rebuilt since a bundle with env specific config
    # is not created as with React App

# Deploy Production
# Deploy React App and Cloud Functions to production environment
Deploy Production:
  stage: deploy_production
  image: node:8
  environment:
    name: production
    url: https://material.firebaseapp.com
  when: manual # Only allow run through button on Gitlab site
  only:
    - master
    - prod
    - web
  variables:
    FIREBASE_CI_PROJECT: "prod" # deploy using prod project in .firebaserc
  artifacts:
    name: "$CI_JOB_STAGE-$CI_COMMIT_REF_SLUG"
    expire_in: 1 week
    when: on_failure
    paths:
      - firebase-debug.log
  except:
    variables:
      - $CI_COMMIT_MESSAGE =~ /skip-deploy/
      - $CI_COMMIT_MESSAGE =~ /skip-prod-deploy/
  script:
    - npm run deploy # Deploy Cloud Functions and React App (Firebase Hosting)