[gitlab] Add a file for Continuous Integration

.gitlab-ci.yml

+image: python:latest
+
+stages:
+  - lint
+  - tests
+  - deploy
+
+lint_py:
+  stage: lint
+  before_script:
+    - pip install tox
+  script:
+    - tox -e flake8
+  only:
+    changes:
+      - "*.py"
+
+pytest:
+  stage: tests
+  script:
+    - python setup.py install
+
+install:
+  stage: deploy
+  script:
+    - python setup.py install

.hgignore

@@ -7,3 +7,5 @@ __pycache__
 tmpdb-*
 build/
 dist/
+*.whl
+.tox/

tox.ini

+[tox]
+envlist = flake8,pytest
+toxworkdir={env:TOX_WORK_DIR:.tox}
+
+[testenv:flake8]
+skip_install = true
+basepython = python3
+deps =
+  flake8
+commands =
+  flake8
+
+[flake8]
+max-line-length = 80
+exclude = .tox,.hg
+
+[testenv:pytest]
+basepython = python3
+deps =
+  pytest
+commands =
+  pytest test/