howto/code/linting.rst

Source code syntax checking
===========================

Getting Started
---------------

.. code:: bash

    git clone ssh://gerrit.opencord.org:29418/voltha-helm-charts.git
    cd voltha-helm-charts

    make help | grep lint
    lint-chart                    chart_version_check.sh
    lint-helm                     Syntax check helm configs
    lint-json                     Syntax check json sources
    lint-license                  Verify sources contain a license block.
    lint-python                   Syntax check using pylint and flake8
    lint-robot                    Syntax check robot sources using rflint
    lint-shell                    Syntax check bash,bourne,etc sources
    lint-yaml                     Syntax check yaml source using yamllint
    UNSTABLE=                     Build targets prone to failure (lint-helm)

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All Sources
+++++++++++

The generic lint target can be used to invoke all defined lint targets.

.. code:: bash

    make clean
    make lint 2>&1 | tee log

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Makefile help
~~~~~~~~~~~~~

Individual Makefiles support a help targe that will display a list of
targets and functionality supported.

.. code:: bash

    make help
    make help-verbose
    make help VERBOSE=1

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Helm Charts
+++++++++++

Command(s):
- `helmlint.sh <https://gerrit.opencord.org/plugins/gitiles/helm-repo-tools/+/refs/heads/master/helmlint.sh>`_

.. code:: bash

    make clean
    make lint-chart lint-helm 2>&1 | tee log

Sources:

- `makefiles/lint <https://gerrit.opencord.org/plugins/gitiles/voltha-helm-charts/+/refs/heads/master/makefiles/lint/>`__
- `makefiles/lint/helm.mk <https://gerrit.opencord.org/plugins/gitiles/voltha-helm-charts/+/refs/heads/master/makefiles/lint/helm.mk>`_
- [`master <https://gerrit.opencord.org/plugins/gitiles/helm-repo-tools/+/refs/heads/master>`__] `helm-repo-tools <https://gerrit.opencord.org/plugins/gitiles/helm-repo-tools>`_

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Golang
++++++

Command:

Sources:

- `makefiles/lint <https://gerrit.opencord.org/plugins/gitiles/voltha-docs/+/refs/heads/master/makefiles/lint/>`__

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JSON
++++

Command:
- `json.tool <https://docs.python.org/3/library/json.html>`_

.. code:: bash

    make clean
    make lint-json 2>&1 | tee log

Sources:

- `makefiles/lint <https://gerrit.opencord.org/plugins/gitiles/voltha-docs/+/refs/heads/master/makefiles/lint/>`__
- `makefiles/lint/json.mk <https://gerrit.opencord.org/plugins/gitiles/voltha-docs/+/refs/heads/master/makefiles/lint/json.mk>`_

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License / Copyright notice
++++++++++++++++++++++++++

Command:

.. code:: bash

    make clean
    make lint-license 2>&1 | tee log

Sources:

- `makefiles/lint <https://gerrit.opencord.org/plugins/gitiles/voltha-system-tests/+/refs/heads/master/makefiles/lint>`__
- `makefiles/lint/license.mk <https://gerrit.opencord.org/plugins/gitiles/voltha-system-tests/+/refs/heads/master/makefiles/lint/license/include.mk>`_

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python
++++++

Command:
- `flake8 <https://flake8.pycqa.org/en/latest>`_
- `pylint <https://www.pylint.org/>`_

.. code:: bash

    make clean
    make lint-python 2>&1 | tee log

Sources:

- `makefiles/lint <https://gerrit.opencord.org/plugins/gitiles/voltha-docs/+/refs/heads/master/makefiles/lint/>`__
- `makefiles/lint/python.mk <https://gerrit.opencord.org/plugins/gitiles/voltha-docs/+/refs/heads/master/makefiles/lint/python.mk>`_
- `makefiles/patches/include.mk <https://gerrit.opencord.org/plugins/gitiles/voltha-docs/+/refs/heads/master/makefiles/patches/>`_

Notes:

- pylint --py3k options is no longer supported by v3.10+
- lint-python target dependency will create a `python virtual env <https://wiki.opennetworking.org/display/JOEY/PythonVenv>`_
- python 3.10+ requires `virtual env patching <https://gerrit.opencord.org/plugins/gitiles/voltha-docs/+/refs/heads/master/patches/>`_

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Robot
+++++

Command: rflint

Sources:

- `makefiles/lint <https://gerrit.opencord.org/plugins/gitiles/voltha-docs/+/refs/heads/master/makefiles/lint/>`__
- `makefiles/lint/robot.mk <https://gerrit.opencord.org/plugins/gitiles/voltha-system-tests/+/refs/heads/master/makefiles/lint/robot.mk>`_

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reStructedTextFile (rst)
++++++++++++++++++++++++

Command: `doc8 <https://pypi.org/project/doc8/>`_

Sources:

- `makefiles/lint <https://gerrit.opencord.org/plugins/gitiles/voltha-docs/+/refs/heads/master/makefiles/lint/>`__
- `Makefiles::doc8 <https://gerrit.opencord.org/plugins/gitiles/voltha-docs/+/refs/heads/master/Makefile#98>`_

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Shell
+++++

Command: `shellcheck <https://github.com/koalaman/shellcheck>`_

Sources:

- `makefiles/lint <https://gerrit.opencord.org/plugins/gitiles/voltha-docs/+/refs/heads/master/makefiles/lint/>`__
- `makefiles/lint/shell.mk <https://gerrit.opencord.org/plugins/gitiles/voltha-system-tests/+/refs/heads/master/makefiles/lint/shell.mk>`_

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Yaml
++++

Command: yamllint

.. code:: bash

    make clean
    make lint-yaml 2>&1 | tee log

Sources:

- `makefiles/lint <https://gerrit.opencord.org/plugins/gitiles/voltha-docs/+/refs/heads/master/makefiles/lint/>`__
- `makefiles/lint/yaml.mk <https://gerrit.opencord.org/plugins/gitiles/voltha-system-tests/+/refs/heads/master/makefiles/lint/yaml.mk>`_

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Bugs
~~~~

- `jira::VOLTHA <https://jira.opencord.org/projects/VOL>`-
- Include repository URL
- Include gerrit/github changeset if available.
- A logfile snippet of the error and surrounding context.

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Repositories
++++++++++++

- [`master <https://gerrit.opencord.org/plugins/gitiles/bbsim/+/refs/heads/master>`__] `bbsim <https://gerrit.opencord.org/plugins/gitiles/bbsim>`_
- [`master <https://gerrit.opencord.org/plugins/gitiles/pod-configs/+/refs/heads/master>`__] `pod-configs <https://gerrit.opencord.org/plugins/gitiles/pod-configs>`_
- [`master <https://gerrit.opencord.org/plugins/gitiles/voltha-docs/+/refs/heads/master>`__] `voltha-docs <https://gerrit.opencord.org/plugins/gitiles/voltha-docs>`_
- [`master <https://gerrit.opencord.org/plugins/gitiles/voltha-helm-charts/+/refs/heads/master>`__] `voltha-helm-charts <https://gerrit.opencord.org/plugins/gitiles/voltha-helm-charts>`_
- [`master <https://gerrit.opencord.org/plugins/gitiles/voltha-system-tests/+/refs/heads/master>`__] `voltha-system-tests <https://gerrit.opencord.org/plugins/gitiles/voltha-system-tests>`_

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Notes
~~~~~

- Make lint complaints are not necessarily fatal.
- Volume problem reports require cleanup before linting can become a default.
- Lint target support is globally available across repositories, given time
  it will be.  Submit patches as needed or open a jira ticket to request
  linting support in specific repositories.
- Makefile refactoring: yes absolutely! Baby steps are needed in the interim...

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