name: isort
on: pull_request
jobs:
  Linter:
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v3
      - id: files
        uses: jitterbit/get-changed-files@v1
        continue-on-error: true

      - name: Run checks
        env:
          PR_FILES_AM: ${{ steps.files.outputs.added_modified }}
          PR_FILES_RENAMED: ${{ steps.files.outputs.renamed }}
        run: |
          # If different modules use different isort configs,
          # we need to run isort for each python component group separately.
          # Otherwise, they all will use the same config.
          ENABLED_DIRS=("cvat-sdk" "cvat-cli" "tests/python")

          isValueIn () {
            # Checks if a value is in an array
            # https://stackoverflow.com/a/8574392
            # args: value, array
            local e match="$1"
            shift
            for e; do
              [[ "$e" == "$match" ]] && return 0;
            done
            return 1
          }

          startswith () {
            # Inspired by https://stackoverflow.com/a/2172367
            # Checks if the first arg starts with the second one
            local value="$1"
            local beginning="$2"
            return $([[ $value == ${beginning}* ]])
          }

          PR_FILES="$PR_FILES_AM $PR_FILES_RENAMED"
          UPDATED_DIRS=""
          for FILE in $PR_FILES; do
              EXTENSION="${FILE##*.}"
              DIRECTORY="$(dirname $FILE)"
              if [[ "$EXTENSION" == "py" ]]; then
                  for EDIR in ${ENABLED_DIRS[@]}; do
                      if startswith "${DIRECTORY}/" "${EDIR}/" && ! isValueIn "${EDIR}" ${UPDATED_DIRS[@]};
                      then
                          UPDATED_DIRS+=" ${EDIR}"
                      fi
                  done
              fi
          done

          if [[ ! -z $UPDATED_DIRS ]]; then
            sudo apt-get --no-install-recommends install -y build-essential curl python3-dev python3-pip python3-venv
            python3 -m venv .env
            . .env/bin/activate
            pip install -U pip wheel setuptools
            pip install $(egrep "isort.*" ./cvat-cli/requirements/development.txt)
            mkdir -p isort_report

            echo "isort version: $(isort --version-number)"
            echo "The dirs will be checked: $UPDATED_DIRS"
            EXIT_CODE=0
            for DIR in $UPDATED_DIRS; do
              isort --check $DIR >> ./isort_report/isort_checks.txt || EXIT_CODE=$(($? | $EXIT_CODE)) || true
            done
            deactivate
            exit $EXIT_CODE
          else
            echo "No files with the \"py\" extension found"
          fi

      - name: Upload artifacts
        if: failure()
        uses: actions/upload-artifact@v3.1.1
        with:
          name: isort_report
          path: isort_report