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Contribution guidelines

Table of contents

This module has grown over time based on a range of contributions from people using it. If you follow these contributing guidelines your patch will likely make it into a release a little more quickly.

Contributing

Please note that this project is released with a Contributor Code of Conduct. By participating in this project you agree to abide by its terms. Contributor Code of Conduct.

  • Fork the repo.
  • Create a separate branch for your change.
  • We only take pull requests with passing tests, and documentation. travis-ci runs the tests for us. You can also execute them locally. This is explained in a later section.
  • Checkout our docs we use to review a module and the official styleguide. They provide some guidance for new code that might help you before you submit a pull request.
  • Add a test for your change. Only refactoring and documentation changes require no new tests. If you are adding functionality or fixing a bug, please add a test.
  • Squash your commits down into logical components. Make sure to rebase against our current master.
  • Push the branch to your fork and submit a pull request.

Please be prepared to repeat some of these steps as our contributors review your code.

Writing proper commits - short version

  • Make commits of logical units.
  • Check for unnecessary whitespace with "git diff --check" before committing.
  • Commit using Unix line endings (check the settings around "crlf" in git-config(1)).
  • Do not check in commented out code or unneeded files.
  • The first line of the commit message should be a short description (50 characters is the soft limit, excluding ticket number(s)), and should skip the full stop.
  • Associate the issue in the message. The first line should include the issue number in the form "(#XXXX) Rest of message".
  • The body should provide a meaningful commit message, which: *uses the imperative, present tense: change, not changed or changes.
    • includes motivation for the change, and contrasts its implementation with the previous behavior.
    • Make sure that you have tests for the bug you are fixing, or feature you are adding.
    • Make sure the test suites passes after your commit:
    • When introducing a new feature, make sure it is properly documented in the README.md

Writing proper commits - long version

  1. Make separate commits for logically separate changes.

    Please break your commits down into logically consistent units which include new or changed tests relevant to the rest of the change. The goal of doing this is to make the diff easier to read for whoever is reviewing your code. In general, the easier your diff is to read, the more likely someone will be happy to review it and get it into the code base.

    If you are going to refactor a piece of code, please do so as a separate commit from your feature or bug fix changes.

    We also really appreciate changes that include tests to make sure the bug is not re-introduced, and that the feature is not accidentally broken.

    Describe the technical detail of the change(s). If your description starts to get too long, that is a good sign that you probably need to split up your commit into more finely grained pieces.

    Commits which plainly describe the things which help reviewers check the patch and future developers understand the code are much more likely to be merged in with a minimum of bike-shedding or requested changes. Ideally, the commit message would include information, and be in a form suitable for inclusion in the release notes for the version of Puppet that includes them.

    Please also check that you are not introducing any trailing whitespace or other "whitespace errors". You can do this by running "git diff --check" on your changes before you commit.

  2. Sending your patches

    To submit your changes via a GitHub pull request, we highly recommend that you have them on a topic branch, instead of directly on master. It makes things much easier to keep track of, especially if you decide to work on another thing before your first change is merged in.

    GitHub has some pretty good general documentation on using their site. They also have documentation on creating pull requests.

    In general, after pushing your topic branch up to your repository on GitHub, you can switch to the branch in the GitHub UI and click "Pull Request" towards the top of the page in order to open a pull request.

  3. Update the related GitHub issue.

    If there is a GitHub issue associated with the change you submitted, then you should update the ticket to include the location of your branch, along with any other commentary you may wish to make.

Dependencies

The testing and development tools have a bunch of dependencies, all managed by bundler according to the Puppet support matrix.

By default the tests use a baseline version of Puppet.

If you have Ruby 2.x or want a specific version of Puppet, you must set an environment variable such as:

export PUPPET_VERSION="~> 5.5.6"

You can install all needed gems for spec tests into the modules directory by running:

bundle install --path .vendor/ --without development system_tests release --jobs "$(nproc)"

If you also want to run acceptance tests:

bundle install --path .vendor/ --with system_tests --without development release --jobs "$(nproc)"

Our all in one solution if you don't know if you need to install or update gems:

bundle install --path .vendor/ --with system_tests --without development release --jobs "$(nproc)"; bundle update; bundle clean

As an alternative to the --jobs "$(nproc) parameter, you can set an environment variable:

BUNDLE_JOBS="$(nproc)"

Note for OS X users

nproc isn't a valid command under OS x. As an alternative, you can do:

--jobs "$(sysctl -n hw.ncpu)"

The test matrix

Syntax and style

The test suite will run Puppet Lint and Puppet Syntax to check various syntax and style things. You can run these locally with:

bundle exec rake lint
bundle exec rake validate

It will also run some Rubocop tests against it. You can run those locally ahead of time with:

bundle exec rake rubocop

Running the unit tests

The unit test suite covers most of the code, as mentioned above please add tests if you're adding new functionality. If you've not used rspec-puppet before then feel free to ask about how best to test your new feature.

To run the linter, the syntax checker and the unit tests:

bundle exec rake test

To run your all the unit tests

bundle exec rake spec

To run a specific spec test set the SPEC variable:

bundle exec rake spec SPEC=spec/foo_spec.rb

Unit tests in docker

Some people don't want to run the dependencies locally or don't want to install ruby. We ship a Dockerfile that enables you to run all unit tests and linting. You only need to run:

docker build .

Please ensure that a docker daemon is running and that your user has the permission to talk to it. You can specify a remote docker host by setting the DOCKER_HOST environment variable. it will copy the content of the module into the docker image. So it will not work if a Gemfile.lock exists.

Integration tests

The unit tests just check the code runs, not that it does exactly what we want on a real machine. For that we're using beaker.

This fires up a new virtual machine (using vagrant) and runs a series of simple tests against it after applying the module. You can run this with:

bundle exec rake acceptance

This will run the tests on the module's default nodeset. You can override the nodeset used, e.g.,

BEAKER_set=centos-7-x64 bundle exec rake acceptance

There are default rake tasks for the various acceptance test modules, e.g.,

bundle exec rake beaker:centos-7-x64
bundle exec rake beaker:ssh:centos-7-x64

If you don't want to have to recreate the virtual machine every time you can use BEAKER_destroy=no and BEAKER_provision=no. On the first run you will at least need BEAKER_provision set to yes (the default). The Vagrantfile for the created virtual machines will be in .vagrant/beaker_vagrant_files.

Beaker also supports docker containers. We also use that in our automated CI pipeline at travis-ci. To use that instead of Vagrant:

PUPPET_INSTALL_TYPE=agent BEAKER_IS_PE=no BEAKER_PUPPET_COLLECTION=puppet5 BEAKER_debug=true BEAKER_setfile=debian9-64{hypervisor=docker} BEAKER_destroy=yes bundle exec rake beaker

You can replace the string debian9 with any common operating system. The following strings are known to work:

  • ubuntu1604
  • ubuntu1804
  • debian8
  • debian9
  • centos6
  • centos7

The easiest way to debug in a docker container is to open a shell:

docker exec -it -u root ${container_id_or_name} bash

The source of this file is in our modulesync_config repository.