Checklists for a successful Matomo release

Work on Beta cycle, towards Release Candidate 1:

• Beta release cycle has started with the first beta release
• Tag a new release for matomo-org/referrer-spam-blacklist and matomo-org/searchengine-and-social-list
• Fetch our latest and greatest home-made libraries with composer update matomo-org/referrer-spam-blacklist matomo-org/searchengine-and-social-list matomo-org/matomo-php-tracker matomo-org/component-network,matomo-org/component-ini,matomo-org/component-decompress,matomo-org/component-cache
• Fetch the latest composer libraries for all with composer update
• Up to date submodules
• Tag the RC candidate
• Check that the build is green
• Package & release the Release Candidate
• Post sticky thread in forum about RC
• Notify translators that they should check if any translation keys got updated.
• inform RC release on social media
• Let translators know about the new RC by posting an announcement here
• update tag manager submodule

Triage PRs and issues:

• Forum support: regularly check all posts in Support & Bugs forum
• Forum General questions: look for bugs & regressions in General questions forum
• Backlog grooming (Matomo core): check issues without milestone and PRs if any one should be fixed in this release
• Check this list of issues across all Matomo repositories, where the milestone is set to Current sprint
• Check this list of Pull requests all Matomo repositories, where the milestone is set to Current sprint
• Triage all PRs not scheduled yet, or close (see also issues without milestone)
• Make CI builds of our official plugins matomo-org/plugin-* all green

The final checks before the stable release:

• Release candidate cycle (at least 1 week cycle)
• Fix all remaining issues in the milestone
• All open source plugins builds are green on master with latest RC
• Plugins that needed a version bump are now released on the marketplace
• Synchronise translations from transifex
• Submodules are up to date

Prepare the Changelog entry:

• Mark that the release has a major DB upgrade
• Use our github changelog generator to generate the changelog using this config.js
• Add to changelog any new issues or FAQ added since first RC
• Add to changelog the security issues fixed, if any
• Do not publish publicly the changelog yet. This also ensures security issues are not publicly visible until the stable release.
• Change changelog published date to the release day

Check the developer changelog is complete, by looking over each issue:

• is this issue relevant to developers? let's mention it in the Developer changelog
• is this issue's title descriptive and useful to people scanning our changelog?
• are the right labels applied to the issue? (issues tagged with labels such as Bug, Enhancement, Major are grouped together in the changelog)
• if this issue was sponsored, we note the sponsor organisation in the changelog.

Merge 3.x-dev branch into master:

• In https://github.com/matomo-org/matomo/settings get an admin to enable "Merge buttons > Allow merge commits"
• Create a Pull request to merge 3.x-dev into master, by clicking on "Merge Pull request > Create a merge commit" (not "Squash & merge")
• In https://github.com/matomo-org/matomo/settings get an admin to disable "Merge buttons > Allow merge commits"

💥 Release 🚀

• Close milestone on Github
• Release publicly the new stable version by running ./scripts/build-package.sh 3.x.y from here and waiting 5 minutes
• In Github release we write

## [Matomo 3.3.0 Changelog](https://matomo.org/changelog/matomo-3-3-0/)

This Github download (below) is only meant for developers and it will require extra work to install it. 
 * Latest stable production release can be found at https://matomo.org/download/ ([learn more](https://matomo.org/docs/installation/)) (recommended)
 * Beta and Release Candidates releases can be found at https://builds.matomo.org/ ([learn more](http://matomo.org/faq/how-to-update/faq_159/))

• Take screenshots of new features + draft a blog post showcasing what's new
• Create this 'Release Matomo 3.*' issue in the next release milestone