# Python CircleCI 2.0 configuration file
#
# Check https://circleci.com/docs/2.0/language-python/ for more details
#
# Adopted from
# https://github.com/facebookresearch/detectron2/blob/master/.circleci/config.yml

version: 2

# -------------------------------------------------------------------------------------
# Environments to run the jobs in
# -------------------------------------------------------------------------------------
cpu: &cpu
  docker:
    - image: circleci/python:3.7
  resource_class: medium

gpu: &gpu
  environment:
    CUDA_VERSION: "10.1"
  machine:
    image: ubuntu-1604-cuda-10.1:201909-23
  resource_class: gpu.large

# -------------------------------------------------------------------------------------
# Re-usable commands
# -------------------------------------------------------------------------------------
setup_venv: &setup_venv
  - run:
      name: Setup Virtual Env
      working_directory: ~/
      command: |
        python -m venv ~/venv
        echo ". ~/venv/bin/activate" >> $BASH_ENV
        . ~/venv/bin/activate
        python --version
        which python
        which pip
        pip install --upgrade pip

install_dep: &install_dep
  - run:
      name: Install Dependencies
      command: |
        pip install --progress-bar off torch==1.5.1+cu101 -f https://download.pytorch.org/whl/torch_stable.html
        pip install --progress-bar off -r requirements-test.txt
        python -c 'import torch; print("Torch version:", torch.__version__)'
        python -m torch.utils.collect_env

install_repo: &install_repo
  - run:
      name: Install Repository
      command: |
        python setup.py build develop

run_unittests: &run_unittests
  - run:
      name: Run Unit Tests
      command: |
        pytest --junitxml=test-results/junit.xml --verbose

run_flake8: &run_flake8
  - run:
      name: Run Linter (flake8)
      command: |
        flake8 --show-source --statistics

run_transformer_benchmark: &run_transformer_benchmark
  - run:
      name: Run Transformer Benchmark
      command: |
        python benchmarks/transformer.py

# -------------------------------------------------------------------------------------
# Jobs to run
# -------------------------------------------------------------------------------------

jobs:
  cpu_tests:
    <<: *cpu

    working_directory: ~/fairscale

    steps:
      - checkout
      - <<: *setup_venv

      # Cache the venv directory that contains dependencies
      - restore_cache:
          keys:
            - cache-key-cpu-{{ checksum "setup.py"}}-{{ checksum "requirements-test.txt"}}

      - <<: *install_dep

      - save_cache:
          paths:
            - ~/venv
          key: cache-key-cpu-{{ checksum "setup.py"}}-{{ checksum "requirements-test.txt"}}

      - <<: *install_repo

      - run:
          name: Run Linter (isort)
          command: |
            isort --check-only

      - run:
          name: Run Linter (black)
          command: |
            black --check .

      - run:
          name: Run type-checking (mypy)
          command: |
            mypy --pretty .

      - <<: *run_flake8

      - <<: *run_unittests

      - store_test_results:
          path: test-results

  gpu_tests:
    <<: *gpu

    working_directory: ~/fairscale

    steps:
      - checkout

      - run: nvidia-smi

      - run: pyenv global 3.7.0

      - <<: *setup_venv

      # Cache the venv directory that contains dependencies
      - restore_cache:
          keys:
            - cache-key-gpu-{{ checksum "setup.py"}}-{{ checksum "requirements-test.txt"}}

      - <<: *install_dep

      - save_cache:
          paths:
            - ~/venv
          key: cache-key-gpu-{{ checksum "setup.py"}}-{{ checksum "requirements-test.txt"}}

      - <<: *install_repo

      - <<: *run_unittests

      - store_test_results:
          path: test-results

  benchmarks:
    <<: *gpu

    working_directory: ~/fairscale

    steps:
      - checkout

      - run: nvidia-smi

      - run: pyenv global 3.7.0

      - <<: *setup_venv

      # Cache the venv directory that contains dependencies
      - restore_cache:
          keys:
            - cache-key-gpu-{{ checksum "setup.py"}}-{{ checksum "requirements-test.txt"}}

      - <<: *install_dep

      - save_cache:
          paths:
            - ~/venv
          key: cache-key-gpu-{{ checksum "setup.py"}}-{{ checksum "requirements-test.txt"}}

      - <<: *install_repo

      - <<: *run_transformer_benchmark


workflows:
  version: 2
  build:
    jobs:
      - cpu_tests
      - gpu_tests
      - benchmarks