variables:
  GOCACHE: "${CI_PROJECT_DIR}/_go/cache"
  DOCKER_HOST: tcp://docker:2375
  DOCKER_DRIVER: overlay2

before_script:
  - mkdir -p ${CI_PROJECT_DIR}/_go/{pkg,bin,cache}
  - rm -rf /go/pkg
  - ln -s ${CI_PROJECT_DIR}/_go/pkg /go/pkg
  - ln -s ${CI_PROJECT_DIR}/_go/bin /go/bin
  - docker login -u gitlab-ci-token -p $CI_JOB_TOKEN $CI_REGISTRY

cache:
  key: "$CI_COMMIT_REF_NAME"
  paths:
    - _go
  untracked: true

stages:
  - deps
  - test
  - build
  - package
  - release

deps:
  stage: deps
  image: golang:1.12
  script:
    - go get -mod=readonly

test:
  stage: test
  dependencies:
    - deps
  image: golang:1.12
  script:
    - go fmt -mod=readonly $(go list ./...)
    - go vet -mod=readonly $(go list ./...)
    - CGO_ENABLED=1 go test -mod=readonly -race $(go list ./...) -coverprofile .testCoverage.txt

build:
  stage: build
  dependencies:
    - deps
  image: golang:1.12
  script:
    - GOOS=linux GOARCH=amd64 CGO_ENABLED=0 go build -mod=readonly -o release/k8s-go -ldflags '-w -s'
  artifacts:
    paths:
      - release/

package:
  stage: package
  dependencies:
    - build
  image: docker:stable
  services:
    - docker:dind
  script:
    - docker build -t $CI_REGISTRY_IMAGE:$CI_COMMIT_REF_SLUG .
    - docker push $CI_REGISTRY_IMAGE:$CI_COMMIT_REF_SLUG

release:
  stage: release
  dependencies:
    - package
  image: docker:stable
  services:
    - docker:dind
  script:
    - docker pull $CI_REGISTRY_IMAGE:$CI_COMMIT_REF_SLUG
    - docker push $CI_REGISTRY_IMAGE:latest
  only:
    - master