Releases

Release process

Going through an example of releasing NixOS 17.09:

One month before the beta

  • Send an email to the nix-devel mailinglist as a warning about upcoming beta “feature freeze” in a month.
  • Discuss with Eelco Dolstra and the community (via IRC, ML) about what will reach the deadline. Any issue or Pull Request targeting the release should be included in the release milestone.

At beta release time

During Beta

  • Monitor the master branch for bugfixes and minor updates and cherry-pick them to the release branch.

Before the final release

At final release time

  • git tag -s -a -m "Release 15.09" 15.09
  • Update “Chapter 4. Upgrading NixOS” section of the manual to match new stable release version.
  • Update the NIXOS_SERIES in the nixos-homepage repository.
  • Get number of commits for the release: git log release-14.04..release-14.12 --format=%an|wc -l
  • Commits by contributor: git log release-14.04..release-14.12 --format=%an|sort|uniq -c|sort -rn
  • Create a new topic on the Discourse instance to announce the release with the above information. Best to check how previous email was formulated to see what needs to be included.

Release Management Team

For each release there are two release managers. After each release the release manager having managed two releases steps down and the release management team of the last release appoints a new release manager.

This makes sure a release management team always consists of one release manager who already has managed one release and one release manager being introduced to their role, making it easier to pass on knowledge and experience.

Release managers for the current NixOS release are tracked by GitHub team @NixOS/nixos-release-managers.

A release manager’s role and responsibilities are:

  • manage the release process
  • start discussions about features and changes for a given release
  • create a roadmap
  • release in cooperation with Eelco Dolstra
  • decide which bug fixes, features, etc… get backported after a release

Release schedule

Date

Event

2016-07-25

Send email to nix-dev about upcoming branch-off

2016-09-01

release-16.09 branch and corresponding jobsets are created, change freeze

2016-09-30

NixOS 16.09 released