pipeline: enable pylint-import-requirements plugin

.travis.yml

@@ -51,13 +51,20 @@ matrix:
 install:
 - pip install pipenv
 - pipenv sync --dev
+# ModuleNotFoundError: No module named 'importlib_metadata'
+# https://github.com/WanzenBug/pylint-import-requirements/issues/17
+- if python3 -c 'import sys; sys.exit(sys.version_info < (3, 8))'; then
+  pipenv graph;
+  pipenv install --dev importlib-metadata;
+  fi
 - if [ ! -z "$PANDAS_VERSION" ]; then
     pipenv install --selective-upgrade "pandas==$PANDAS_VERSION";
   fi
 - pipenv graph
 
 script:
-- pipenv run pylint freesurfer_stats tests/*
+- pipenv run pylint --load-plugins=pylint_import_requirements freesurfer_stats
+- pipenv run pylint tests/*
 - pipenv run pytest --cov=freesurfer_stats --cov-report=term-missing --cov-fail-under=100
 
 after_success:

Pipfile

@@ -14,6 +14,7 @@ isort = "*"
 # >=2.3.0 due to false+ assignment-from-no-return
 # https://github.com/PyCQA/pylint/issues/2694
 pylint = ">=2.3.0,<3"
+pylint-import-requirements = "<3"
 pytest = "<5"
 # >=2 for --cov-fail-under
 pytest-cov = "<3,>=2"