# CI Overview
# -----------
#
# Each night:
#
#   A build image is created (ci_image) from `docker/Dockerfile.ci` and is
#   pushed to `quay.io/influxdb/rust:ci`. This build image is then used to run
#   the CI tasks for the day.
#
# CI runs for git branches ending in `/perf`:
#
#   Runs tests, fmt, & lints and then compiles binaries using the "release"
#   cargo target and pushes a container with the binary to
#   `quay.io/influxdb/fusion` (see perf_image below).
#
# CI for all other branches is performed by the GitHub actions (see .github dir)

version: 2.1

commands:
  rust_nightly:
    description: Install nightly Rust toolchain
    steps:
      - run:
          name: Install rust nightly-2020-11-19
          command: rustup toolchain install nightly-2020-11-19
      - run:
          name: Install rustfmt and clippy for nightly-2020-11-19
          command: rustup component add rustfmt clippy --toolchain nightly-2020-11-19

jobs:
  fmt:
    docker:
      - image: quay.io/influxdb/rust:ci
    steps:
      - checkout
      - rust_nightly
      - run:
          name: Rust fmt
          command: cargo fmt --all -- --check
  lint:
    docker:
      - image: quay.io/influxdb/rust:ci
    steps:
      - checkout
      - rust_nightly
      - run:
          name: Clippy
          command: cargo clippy --all-targets --workspace -- -D warnings
  test:
    docker:
      - image: quay.io/influxdb/rust:ci
    resource_class: xlarge # use of a smaller executor tends crashes on link
    steps:
      - checkout
      - rust_nightly
      - run:
          name: Cargo test
          command: cargo test --workspace
  
  # Build a dev binary.
  #
  # Compiles a binary with the default ("dev") cargo profile from the iox source
  # using the latest ci_image.
  build:
    docker:
      - image: quay.io/influxdb/rust:ci
    steps:
      - checkout
      - rust_nightly
      - run:
          name: Cargo build
          command: cargo build --workspace
  
  # Compile a cargo "release" profile binary for branches that end in `/perf`
  #
  # Uses the latest ci_image (influxdb/rust below) to build a release binary and
  # copies it to a minimal container image based upon `rust:slim-buster`. This
  # minimal image is then pushed to `quay.io/influxdb/fusion:${BRANCH}` with '/'
  # repaced by '.' - as an example:
  #
  #   git branch: dom/my-awesome-feature/perf 
  #   container: quay.io/influxdb/fusion:dom.my-awesome-feature.perf
  #
  # Subsequent CI runs will overwrite the tag if you push more changes, so watch
  # out for parallel CI runs!
  #
  # To change the contents of the build container, modify docker/Dockerfile.ci
  # To change the final release container, modify docker/Dockerfile.perf
  perf_image:
    docker:
      - image: quay.io/influxdb/rust:ci
    steps:
      - checkout
      - rust_nightly
      - run:
          name: Cargo release build with target arch set for CRoaring
          command: ROARING_ARCH=x86-64 cargo build --release
      - setup_remote_docker:
          docker_layer_caching: true
      - run: |
          sudo apt-get update
          sudo apt-get install -y docker.io
      - run: |
          echo "$QUAY_PASS" | docker login quay.io --username $QUAY_USER --password-stdin
      - run: |
          BRANCH=$(git rev-parse --abbrev-ref HEAD | tr '/' '.')
          docker build -t quay.io/influxdb/fusion:$BRANCH -f docker/Dockerfile.perf .
          docker push quay.io/influxdb/fusion:$BRANCH
      - run:
          name: Deploy tags
          command: ./.circleci/get-deploy-tags.sh

  # Prepare the CI image used for other tasks.
  #
  # A nightly job (scheduled below in the `workflows` section) to build the CI
  # image (influxdb/rust) used for the rest of the checks.
  #
  # To modify the contents of the CI image, update docker/Dockerfile.ci
  ci_image:
    machine: true
    resource_class: xlarge
    steps:
      - checkout
      - run: |
          echo "$QUAY_PASS" | docker login quay.io --username $QUAY_USER --password-stdin
      - run: |
          COMMIT_SHA=$(git rev-parse --short HEAD)
          docker build -t quay.io/influxdb/rust:$COMMIT_SHA -f docker/Dockerfile.ci .
          docker tag quay.io/influxdb/rust:$COMMIT_SHA quay.io/influxdb/rust:ci
          docker push quay.io/influxdb/rust:$COMMIT_SHA
          docker push quay.io/influxdb/rust:ci

workflows:
  version: 2
  
  # Internal pipeline for perf builds.
  #
  # Filter ensures this only runs for git branches ending in `/perf`.
  perf_build:
    jobs:
      - fmt:
          filters:
            branches:
              only: /.*\/perf$/
      - lint:
          filters:
            branches:
              only: /.*\/perf$/
      - test:
          filters:
            branches:
              only: /.*\/perf$/
      - build:
          filters:
            branches:
              only: /.*\/perf$/
      - perf_image:
          filters:
            branches:
              only: /.*\/perf$/
          requires: # Only do a release build if all tests have passed
            - fmt
            - lint
            - test
            - build
  
  # Nightly rebuild of the build container
  ci_image:
    triggers:
      - schedule:
          cron: "0 5 * * *"
          filters:
            branches:
              only:
                - main
    jobs:
      - ci_image