Release Guide

This METplus Release Guide provides detailed instructions for METplus developers for creating software releases for the METplus component repositories.


This Release Guide is intended for developers creating releases and is not intended for users of the software.

Release Types

Coordinated Release

A METplus coordinated release is a group of official or bugfix releases for each of the METplus components that have been developed and tested in parallel. Coordinated release announcements on the DTC METplus Downloads page link to the component releases that comprise the coordinated release. When bugfix releases are issued for any METplus component, the corresponding coordinated release announcement is updated to link to the most recent bugfix version.

Official Release

An official release is a stable release of a METplus component and typically matches the release candidate, which has passed all tests. It is the version of the code that has been tested as thoroughly as possible and is reliable enough to be used in production.

Bugfix Release

A bugfix release for a METplus component introduces no new features, but fixes bugs in previous official releases and targets the most critical bugs affecting users.

Development Release


Beta releases are a pre-release of a METplus software component to give a larger group of users the opportunity to test the recently incorporated new features, enhancements, and bug fixes. Beta releases allow for continued development and bug fixes before an official release. There are many possible configurations of hardware and software that exist and installation of beta releases allow for testing of potential conflicts.

Release Candidate (rc)

A release candidate is a version of a METplus software component that is nearly ready for official release but may still have a few bugs. At this stage, all product features have been designed, coded, and tested through one or more beta cycles with no known bugs. It is code complete, meaning that no entirely new source code will be added to this release. There may still be source code changes to fix bugs, changes to documentation, and changes to test cases or utilities.

Release Support Policy

The METplus developers officially provide bug fix support for the latest official release and for the developmental releases as described above. This includes addressing critical bugs, security vulnerabilities, and functionality issues. We acknowledge that certain exceptions may arise to cater to the specific needs of funding institutions. These exceptions may include dedicating resources, prioritizing bug fixes, or extending support beyond the standard policy for funding-related requirements. Such exceptions will be evaluated on a case-by-case basis, ensuring a mutually beneficial collaboration between our software team and the respective funding institutions. For further inquiries or to report any bugs, please contact our dedicated support team in the METplus GitHub Discussions Forum.

Instructions Summary

Instructions are provided for the following types of software releases:

  1. Coordinated Release consisting of a group of software component releases

  2. Official Release (e.g. vX.Y.0) from the develop branch (becomes the new main_vX.Y branch)

  3. Bugfix Release (e.g. vX.Y.Z) from the corresponding main_vX.Y branch

  4. Development Release (e.g. vX.Y.Z-betaN or vX.Y.Z-rcN) from the develop branch

The instructions that are common to all components are documented only once and then included in the release steps for all components. However some instructions are specific to individual repositories and documented separately.

Release instructions are described in the following sections.