.gitlab-ci.yml

## Documentation https://docs.gitlab.com/ee/ci/yaml/

image: registry.gitlab.com/kyb/byte_vector

stages:
- prepare
- build
- test
- deploy

variables:
  GIT_STRATEGY: fetch            ## https://docs.gitlab.com/ee/ci/yaml/README.html#git-strategy
  GIT_SUBMODULE_STRATEGY: normal ## https://docs.gitlab.com/ee/ci/yaml/README.html#git-submodule-strategy

before_script:
- function DEBUG { >&2 "$@" || true; }

.runner_tags_docker:
  tags:
  - docker


# Use TLS https://docs.gitlab.com/ee/ci/docker/using_docker_build.html#tls-enabled
docker_image:
  stage: prepare
  image: docker:19.03.12
  services:
  - docker:19.03.12-dind
  only:
    changes:
    - Dockerfile
    #- .gitlab-ci.yml
    refs:
    - master
    - CI
    - docker-build
  script:
  - set -x
  - docker login -u $CI_REGISTRY_USER -p "$CI_REGISTRY_PASSWORD" $CI_REGISTRY
  - docker pull $CI_REGISTRY_IMAGE:latest || true
  - docker build --cache-from $CI_REGISTRY_IMAGE:latest --tag $CI_REGISTRY_IMAGE:$CI_COMMIT_SHA --tag $CI_REGISTRY_IMAGE:latest .
  - docker push $CI_REGISTRY_IMAGE:$CI_COMMIT_SHA
  - docker push $CI_REGISTRY_IMAGE:latest

manual_docker_image:
  extends: docker_image
  when: manual
  only:
    changes:
    - Dockerfile
    - .gitlab-ci.yml
  except:
  - master
  - tags


build_and_test:
  stage: build
  except:
  - tags
  extends: .runner_tags_docker
  script:
  ## Be sure of current branch, not detached HEAD
  - git checkout -B $CI_COMMIT_REF_NAME
  ## -------- BUILD --------
  - cmake -B build -DBUILD_TESTING=ON
  - cmake --build build -- -j #VERBOSE=1
  #- cmake --build build --target byte_vector_amalgamate
  ## -------- TEST --------
  - cmake --build build --target test  #- ( cd build && ctest; )
  - ./build/byte_vector-demo
  ## -------- PREPARE ARTIFACTS -------
  - ln -f build/{rev_label,byte_vector.hh} -t.
  - git log -1 --format=%B >commit_message
  artifacts:
    paths:
    - "byte_vector.hh"
    - "rev_label"
    - "commit_message"


## --- STORE ARTIFACTS TO A DEDICATED BRANCH ---
store_artifacts:
  stage: deploy
  extends: .runner_tags_docker
  only:
    refs:
    - master
    - CI
    variables:
    - $KI
  # except:
  # - tags
  dependencies: 
  - build_and_test
  image: registry.gitlab.com/kyb/byte_vector #/git-ubuntu
  variables:
    GIT_STRATEGY: none
  script:
  ## --------- GET REV_LABEL ----------
  - REV_LABEL="$(cat rev_label)" #"$(sed -En 's|^#define\s+BUILD_GIT\s+\"(.*)\"|\1|p' build_info.h | tr / _)"   
  - echo -e $'\e[1;37m' "$REV_LABEL" $'\e[0m'
  ## --------- URL --------------
  - echo "$KI" >/tmp/ki  &&  chmod 400 /tmp/ki
  - export GIT_SSH_COMMAND="ssh -i/tmp/ki -oStrictHostKeyChecking=no"
  - SSH_URL=$(echo "$CI_REPOSITORY_URL" | perl -pe 's#https://(.+?):(.+?)@(.+?)/(.+?).git#git@\3:\4.git#' )
  ## ---------- CLONE, ADD and COMMIT ---------------
  - git clone "$SSH_URL" --depth 1 --single-branch -b artifacts/$CI_COMMIT_REF_NAME ./artifacts  ||  { git init artifacts && git -C artifacts checkout --orphan artifacts/$CI_COMMIT_REF_NAME; }
  - echo >README.md.new  "## byte_vector $REV_LABEL"
  - ln byte_vector.hh artifacts/byte_vector-$REV_LABEL.hh
  - echo >>README.md.new "[byte_vector-$REV_LABEL.hh](byte_vector-$REV_LABEL.hh)  "
  - echo >>README.md.new -e "\n## Changelog\n$(cat commit_message)\n\n---\n"
  - cat  >>README.md.new artifacts/README.md  || true
  - mv     README.md.new artifacts/README.md
  - cd artifacts
  - ln -sf byte_vector-$REV_LABEL.hh byte_vector.hh
  - git add .
  - DEBUG git status 
  - git config --global user.email "ci@byte_vector.c++"
  - git config --global user.name "byte_vector GitLab CI"
  - git commit -m"$REV_LABEL
    
    $(cat commit_message)
    "
  ## ------------ PUSH --------------
  - git push "$SSH_URL" HEAD:artifacts/$CI_COMMIT_REF_NAME #ToDo use $CI_REPOSITORY_URL
  ## ----------- EPILOG -----------
  - echo "See artifacts at "$'\e[1;37m'"$CI_PROJECT_URL/tree/artifacts/$CI_COMMIT_REF_NAME"$'\e[0m'


## ToDO use git ls-remote. No fetch required. Much faster on a big repos!
.remove_stale_artifacts:
  stage: deploy
  extends: .runner_tags_docker
  only:
    refs:
    - master
    variables:
    - $KI
  except:
  - tags
  dependencies:
    ## No dependancies
  image: alpine
  variables:
    GIT_CHECKOUT: "false"
    GIT_SUBMODULE_STRATEGY: none
  script:
  - apk add --no-cache git perl openssh-client
  - mkdir /temp  &&  mount -t tmpfs -o size=500m tmpfs /temp
  ## --- FIND STALED ARTIFACTS BRANCHES ---
  - git branch -r  --list origin/artifacts/\* | grep -v HEAD | sed -e s#origin/##g -Ee s#^\\s+##g >/temp/ARTIFACTS_BRANCHES
  - DEBUG cat /temp/ARTIFACTS_BRANCHES
  - git branch -r  --list origin/\*           | grep -v -e HEAD -e artifacts/| sed -e s#origin/##g -Ee s#^\\s+#artifacts/#g >/temp/BRANCHES
  - DEBUG cat /temp/BRANCHES
  - fgrep -vf /temp/BRANCHES /temp/ARTIFACTS_BRANCHES >/temp/STALE_ARTIFACTS_BRANCHES  ||  return 0
  - DEBUG cat /temp/STALE_ARTIFACTS_BRANCHES
  - PUSH_SPEC=$(sed -e 's#\s+##g' -e 's#^#:#g' /temp/STALE_ARTIFACTS_BRANCHES)
  - DEBUG echo "$PUSH_SPEC"
  ## --------- URL --------------
  - echo "$KI" >/tmp/ki  &&  chmod 400 /tmp/ki
  - export GIT_SSH_COMMAND="ssh -i/tmp/ki -oStrictHostKeyChecking=no"
  - SSH_URL=$(echo "$CI_REPOSITORY_URL" | perl -pe 's#https://(.+?):(.+?)@(.+?)/(.+?).git#git@\3:\4.git#' )
  - git push "$SSH_URL" $PUSH_SPEC


releases_page:
  stage: deploy
  extends: .runner_tags_docker
  image: alpine
  variables:
    GIT_CHECKOUT: "false"
    GIT_STRATEGY: none
  dependencies:
  - build_and_test
  #- store_artifacts
  when: manual
  only:
    refs:
    - master
    - CI
    variables:
    - $PRI_TOKEN
  script:
  - apk add --no-cache curl jq
  ## --------- GET REV_LABEL ----------
  - REV_LABEL="$(cat rev_label)"
  - echo -e $'\e[1;37m' "$REV_LABEL" $'\e[0m'
  - function name_url { for x; do echo $COMMA'{"name":"'"$x"'","url":"'"$CI_PROJECT_URL/raw/artifacts/$CI_COMMIT_REF_NAME/$x"'"}'; COMMA=, ;done; }
  - description="$(cat commit_message)"
  - description="$description\n\n### [byte_vector-$REV_LABEL.hh]($CI_PROJECT_URL/raw/artifacts/$CI_COMMIT_REF_NAME/byte_vector-$REV_LABEL.hh)"
  - description="${description//$'\n'/\\n}"
  - DEBUG echo "$description"
  - >
    JSON_REQ='{
      "name": "'"$REV_LABEL"'",
      "tag_name": "'"$REV_LABEL"'",
      "ref": "'"$CI_COMMIT_SHA"'",
      "description": "'"$description"'",
      "assets": {
        "links": [
          {
            "name": "Artifacts branch",
            "url": "'"$CI_PROJECT_URL/tree/artifacts/$CI_COMMIT_REF_NAME"'"
          },'"
          $(name_url byte_vector-$REV_LABEL.hh)
        ]
      }
    }"
  - echo "$JSON_REQ" | jq  || { echo "$JSON_REQ"; false; }  ## VALIDATE
  - >-
    curl --header "PRIVATE-TOKEN: $PRI_TOKEN" 
    "https://gitlab.com/api/v4/projects/$CI_PROJECT_ID/releases" 
    --header 'Content-Type: application/json' 
    --data "$JSON_REQ"
    --request POST
    > /tmp/resp
  - cat /tmp/resp | jq
  - cat /tmp/resp | test "$(jq -r .name)" == "$REV_LABEL"  ## Assert the result

auto_releases_page:
  extends: releases_page
  when: on_success  # oveeride manual
  only:
    refs:
    - master
    variables:
    - $PUBLISH_TO_RELEASES_PAGE
  except:
    refs:
    - tags