Alternative version of python-ly conversion

.gitlab-ci.yaml

@@ -0,0 +1,42 @@
+.test_template: &test_definition
+  stage: test
+  tags:
+    - docker
+  script:
+    - pip3 install -r requirements.txt
+    - pip3 install -r dev-only-reqs.txt
+    - pycodestyle --ignore=E501,W503,E121,E123,E126,E133,E226,E241,E242,E704 .
+    - pytest tests --cov=ly --cov-report term --cov-report html
+
+test_python3.5:
+  image: python:3.5
+  <<: *test_definition
+test_python3.6:
+  image: python:3.6
+  <<: *test_definition
+test_python3.7:
+  image: python:3.7
+  <<: *test_definition
+test_python3.8:
+  image: python:3.8
+  <<: *test_definition
+
+test:
+  image: python
+  <<: *test_definition
+  artifacts:
+    paths:
+      - htmlcov/
+    expire_in: 1 day
+
+docs:
+  stage: deploy
+  tags:
+    - static-server
+  dependencies:
+    - test
+  script:
+    - rm -rf ~/coverage/htdocs/python-ly
+    - mv htmlcov/ ~/coverage/htdocs/python-ly
+  only:
+    - stable

README.rst

@@ -47,7 +47,7 @@ This will behave like running the `ly` command when the package is installed.
 The `ly` Python module
 ----------------------
 
-The `ly` module supports both Python2 and Python3. This is a short description
+The `ly` module supports only Python3. This is a short description
 of some modules:
 
 * ``ly.slexer``: generic tools to build parsers using regular expressions
@@ -72,3 +72,21 @@ by typing ``make html`` in the doc directory.
 
 You can also read the docs online at http://python-ly.readthedocs.org/.
 
+`Core Understanding Test (CUT)`_
+--------------------------------
+
+.. _Core Understanding Test (CUT): //gitlab.ccel.org/drupal/shared-modules/wikis
+  /Core-Understanding-Test
+
+- When should branches be merged to ``master``, ``ccel-specific``,
+  and ``stable`` respectively?
+- If you were going to be a developer for python-ly's ``ly2xml`` conversion,
+  where would be a good directory of test files to use in order to become
+  familiar with ``Lilypond`` and ``MusicXML``?
+- What software should you use to render ``Lilypond`` and ``MusicXML`` files,
+  respectively?
+- Within the ``/ly/musicxml`` directory, what is the general flow of control 
+  between files?
+- What are two important differences and one similarity between ``Lilypond`` and
+  ``MusicXML`` files?
+

dev-only-reqs.txt

@@ -0,0 +1,4 @@
+coverage==4.5.4
+pycodestyle==2.5.0
+pytest==5.1.2
+pytest-cov==2.7.1