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Getting started with
continuous integration
and WordPress
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Carl Alexander
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@twigpress
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carlalexander.ca
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No content
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Growing pains
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Writing high-quality
WordPress code is hard to do
Growing pains
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Requires constant effort
Growing pains
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Even harder on a team
Growing pains
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No longer alone pushing code
Growing pains
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Need to standardize
Growing pains
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Goal of continuous integration
Growing pains
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Ensures code quality
stays consistent
Growing pains
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Minimizes maintenance work
Growing pains
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Automates your different
development workflows
Growing pains
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What is it?
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Part of a larger practice
What is it?
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What is it?
Continuous deployment
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What is it?
Continuous integration
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Processes
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Processes
Continuous integration
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Checks out code
from your repository
Processes
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Compiles your
JavaScript or preprocessed CSS
Processes
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Processes
Continuous integration
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Can mean different things
to different people
Processes
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Runs unit tests
Processes
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Processes
Continuous integration
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This is where things can vary
Processes
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Not everyone
has a staging server
Processes
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Not everyone
does acceptance testing
Processes
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Prerequisites
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Continuous integration
can’t exists on its own
Prerequisites
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Relies on other processes
and tools to do its job
Prerequisites
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Version control system
Prerequisites
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Automated test suite
Prerequisites
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Automated test suite
Prerequisites
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Code quality tools
Prerequisites
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Why do we need it?
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We want to commit code often
Why do we need it?
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Lots of benefits to doing it
Why do we need it?
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Not without issues either
Why do we need it?
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Can’t let it affect code quality
Why do we need it?
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Need to prevent errors
Why do we need it?
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Helps prevent both issues
Why do we need it?
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Questions
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Piecing it together
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Two types of continuous
integration workflows
Piecing it together
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Local
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Why would you want to put
together a local workflow?
Local
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Easier to get up and running
Local
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Lets you test things on your own
Local
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Still useful if you move to a service
Local
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GrumPHP
Local
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Best (and only) tool
Local
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Runs code quality tools
whenever you commit code
Local
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Uses git hooks to do it
Local
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Can’t commit code
without tools running
Local
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Same as if it was done elsewhere
Local
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Has limitations
Local
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Hosted services
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Systems hosted in the cloud
Hosted services
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Very broad category
Hosted services
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Will look at the ones
with WordPress support
Hosted services
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A lot of the common features
Hosted services
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Free tier
Hosted services
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Important when evaluating
Hosted services
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Often don’t need more than that
Hosted services
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Different levels of support
for open source projects
Hosted services
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YAML configuration
Hosted services
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Easy to read
Hosted services
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Integrates with
your version control system
Hosted services
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Needs to know when
someone commits code
Hosted services
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Validate commits
on different branches
Hosted services
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Only supports git
Hosted services
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WP-CLI support
Hosted services
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Comparing services
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Comparing services
• Bitbucket Pipelines
• Buddy
• CircleCI
• GitLab CI
• Travis CI
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Bitbucket Pipelines
Comparing services
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Buddy
Comparing services
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Comparing services
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Comparing services
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CircleCI
Comparing services
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GitLab CI
Comparing services
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Travis CI
Comparing services
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Questions
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Your first workflow
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WP-CLI scaffold command
Your first workflow
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$ wp scaffold plugin-tests my-plugin --ci=
Your first workflow
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$ wp scaffold theme-tests my-theme --ci=
Your first workflow
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What do you get?
Your first workflow
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Continuous integration
configuration file
Your first workflow
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Rules for PHP code sniffer
Your first workflow
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Configuration file for PHPUnit
Your first workflow
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Connect your repository
to your chosen service
Your first workflow
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Workflow consists of
two processes
Your first workflow
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Checks for code style issues
Your first workflow
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Runs WordPress unit tests
Your first workflow
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Does this on a mix of
PHP and WordPress versions
Your first workflow
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Varies depending on the
continuous integration service
Your first workflow
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All the services support
PHP 5.6 or newer versions
Your first workflow
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A modern approach
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Huge topic
A modern approach
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Lots of different services
A modern approach
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You can customize them
any way that you want
A modern approach
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Automate the processes
that you already have
A modern approach
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WP-CLI is a great way to get
started if you don’t have any
A modern approach
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Great foundation for any workflow
A modern approach
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Questions
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Thank you!