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LArSoft release naming policy » History » Version 4

Version 3 (Erica Snider, 03/19/2015 01:56 AM) → Version 4/9 (Erica Snider, 03/19/2015 02:34 AM)

h1. LArSoft release naming and retention policy

These policies were approved at the May 6 LArSoft Librarian's Meeting: https://indico.fnal.gov/categoryDisplay.py?categId=405

h2. Release naming policies

* All release versions will use the following numbering convention: vMM_mm_pp
** MM = major number, mm = minor number, pp = patch number
** Releases that require a fork in order to fix a problem will have a suffix added after the patch number
*** A fork is required if and only if the release to be patched is not the latest release available
** [The following item is approved on a case-by-case basis at a LArSoft Coordination Meeting] A release can be declared as a "production release candidate", in which case it will have major, minor and patch numbers of the target production release, but with the suffix "_rcN" appended, where N = 1, 2,...
* Version numbers will be incremented according to the following policy:
** The patch number will increment for routine weekly integration releases or bug fixes
** The minor number will increment when new features or changes in functionality are introduced
*** New data members added to existing data products, or extensions to existing user-facing interfaces will require that the minor number be changed.
*** Interface changes that can be considered
** The major number will be incremented for changes that break backwards compatibility, or that involve changes to important components of the infrastructure. For example:
*** Changes to data products that are not backwards compatible
*** Changes to user-level interfaces (i.e., interface changes that are not backwards compatible and cannot be considered to be part of an implementation)
*** Changes to any of the major external dependencies (e.g., root, gcc)

h2. Release retention policies


* Releases are categorized into three classes Policies for the purposes of retention policy
** Production
** Integration (sometimes referred to as "weekly")
** Nightly

* Retention policy for
production releases differ from those of other releases in the following ways:
** Production releases will be announced as such to the LArSoft community and identified on the [[LArSoft release list]] page.
***
collaboration. The determination of what releases qualify as "production" will be made by the experiments.
***
The affirmation of a single experiment is sufficient to declare a release as "production".
** Production releases will be retained indefinitely.
***
Removal of production releases will be coordinated with the experiment(s) that requested the production status.
** Each production release will carry one or more common tags across all constituent repositories indicating the larsoft version and the experiment that requested the production status.
***
More than one tag will be used in the case that the release is declared as "production" by more than one experiment.

* Retention policy for integration releases
** Unless otherwise specified, a tagged release will be considered as an "integration" release.
*** The purpose of these releases is (a) to provide a code base for development that is stable yet close to the head of some development branch, or (b) to test a particular set of features or changes integrated into a specific body of code.
*** A release used for (b) will sometimes be referred to as a "production pre-release" or a "production release candidate". In all cases, they will be retained according to the policy for any other integration release.
** Integration releases will be deleted as space is needed
*** An announcement will be made to the "larsoft" email list at least one week in advance of deleting an integration release
*** If an objection is raised to a planned deletion, the release in question will not be deleted pending a further discussion and decision at a subsequent LArSoft Coordination Meeting.

* Retention policy for nightly releases [implemented by convention without approval]
** Nightly releases will be retained for no more than one week.
** Proposed changes to this period should be discussed at a LArSoft Stakeholders or Steering Committee meeting.