DrupalCI Improvements

We have been making some improvements to DrupalCI in order to accommodate several broad categories of architectural improvements and feature requests, as summarized in the DrupalCI roadmap. Some highlights include:

• Ability to Build projects that have external composer dependencies
• Projects are built using composer and the composer facade
• Patches applied to composer.json will cause a recalculation of dependencies (meaning dependency changes can be submitted in the patch)
• Dependencies rely on composer, so if a developer wants granular control over *which* dependencies are tested, they can add a composer.json to their project and specify exactly which deps.
• ‘Require-dev’ of tested dependencies will also be downloaded.
• More artifacts available post test to determine root cause of failures (see jenkins)
• Repeatable build file that can be downloaded to a local drupalci instance and re-executed verbatum (remote config soon!)
• Patch names can no longer interfere with tests accidentally
• Database containers are no longer persistent and shared between tests. All containers are created and destroyed per test
• Containers and environments split from the testrunner codebase
• Container images are pulled if they are not already local
• DrupalCI and all dependencies upgraded to use php7 compatible code
• all database interaction happens through PDO

Next steps include further review and testing of these changes, as well as documenting the changes and the contribution process.

Production outage: No
Change affects: DrupalCI
Deployment schedule: To be deployed in December
Backout plan: revert or fix in place