Releases
A release of Iris is a tag on the SciTools/Iris Github repository.
The summary below is of the main areas that constitute the release. The final section details the Maintainer Steps to take.
Release Manager
A Release Manager will be nominated for each release of Iris. This role involves:
deciding which features and bug fixes should be included in the release
managing the project board for the release
using a GitHub Releases Discussion Forum for documenting intent and capturing any discussion about the release
The Release Manager will make the release, ensuring that all the steps outlined on this page are completed.
Before Release
Deprecations
Ensure that any behaviour which has been deprecated for the correct number of previous releases is now finally changed. More detail, including the correct number of releases, is in Deprecations.
Standard Names
Update the file etc/cf-standard-name-table.xml
to the latest CF standard names,
from the latest CF standard names.
( This is used during build to automatically generate the sourcefile
lib/iris/std_names.py
. )
Release Branch
Once the features intended for the release are on main
, a release branch
should be created, in the SciTools/iris
repository. This will have the name:
v{major release number}.{minor release number}.x
for example:
v1.9.x
This branch shall be used to finalise the release details in preparation for the release candidate.
Release Candidate
Prior to a release, a release candidate tag may be created, marked as a
pre-release in GitHub, with a tag ending with rc
followed by a
number (0-based), e.g.,:
v1.9.0rc0
If created, the pre-release shall be available for a minimum of two weeks prior to the release being cut. However a 4 week period should be the goal to allow user groups to be notified of the existence of the pre-release and encouraged to test the functionality.
A pre-release is expected for a major or minor release, but not for a point release.
If new features are required for a release after a release candidate has been cut, a new pre-release shall be issued first.
Make the release candidate available as a conda package on the conda-forge Anaconda channel using the rc_iris label. To do this visit the conda-forge iris-feedstock and follow CFEP-05. For further information see the conda-forge User Documentation.
Documentation
The documentation should include all of the whatsnew
entries for the release.
This content should be reviewed and adapted as required.
Steps to achieve this can be found in the Maintainer Steps.
The Release
The final steps of the release are to change the version string __version__
in the source of iris.__init__.py
and ensure the release date and details
are correct in the relevant whatsnew
page within the documentation.
Once all checks are complete, the release is cut by the creation of a new tag
in the SciTools/iris
repository.
Update conda-forge
Once a release is cut on GitHub, update the Iris conda recipe on the conda-forge iris-feedstock for the release. This will build and publish the conda package on the conda-forge Anaconda channel.
Update PyPI
Update the scitools-iris project on PyPI with the latest Iris release.
To do this perform the following steps.
Create a conda environment with the appropriate conda packages to build the
source distribution (sdist
) and pure Python wheel (bdist_wheel
):
> conda create -n iris-pypi -c conda-forge --yes pip python setuptools twine wheel
> . activate iris-pypi
Checkout the appropriate Iris <release>
tag from the appropriate <repo>
.
For example, to checkout tag v1.0
from upstream
:
> git fetch upstream --tags
> git checkout v1.0
Build the source distribution and wheel from the Iris root directory:
> python setup.py sdist bdist_wheel
This ./dist
directory should now be populated with the source archive
.tar.gz
file, and built distribution .whl
file.
Check that the package description will render properly on PyPI for each of the built artifacts:
> python -m twine check dist/*
To list and check the contents of the binary wheel:
> python -m zipfile --list dist/*.whl
If all seems well, sufficient maintainer privileges will be required to upload these artifacts to scitools-iris on PyPI:
> python -m twine upload --repository-url https://upload.pypi.org/legacy/ dist/*
Ensure that the artifacts are successfully uploaded and available on scitools-iris before creating a conda test environment to install Iris from PyPI:
> conda deactivate
> conda env create --file ./requrements/ci/iris.yml
> . activate iris-dev
> conda install -c conda-forge pip
> python -m pip install --no-deps scitools-iris
For further details on how to test Iris, see Running the Tests.
See also
For further information on packaging and uploading a project to PyPI, please refer to Generating Distribution Archives and Packaging Your Project.
Merge Back
After the release is cut, the changes from the release branch should be merged
back onto the SciTools/iris
main
branch.
To achieve this, first cut a local branch from the latest main
branch,
and git merge the .x
release branch into it. Ensure that the
iris.__version__
, docs/src/whatsnew/index.rst
, docs/src/whatsnew/dev.rst
,
and docs/src/whatsnew/latest.rst
are correct, before committing these changes
and then proposing a pull-request on the main
branch of SciTools/iris
.
Point Releases
Bug fixes may be implemented and targeted on the .x
release branch.
These should lead to a new point release, and another tag. For example, a fix
for a problem with the v1.9.0
release will be merged into v1.9.x
release
branch, and then released by tagging v1.9.1
.
New features shall not be included in a point release, these are for bug fixes.
A point release does not require a release candidate, but the rest of the
release process is to be followed, including the merge back of changes into
main
.
Maintainer Steps
These steps assume a release for 1.9.0
is to be created.
Release Steps
Create the release feature branch
v1.9.x
on SciTools/iris. The only exception is for a point/bugfix release, as it should already existUpdate the
iris.__init__.py
version string e.g., to1.9.0
Update the
whatsnew
for the release:Use
git
to renamedocs/src/whatsnew/dev.rst
to the release version filev1.9.rst
Update the symbolic link
latest.rst
to reference the latest whatsnewv1.9.rst
Use
git
to delete thedocs/src/whatsnew/dev.rst.template
fileIn
v1.9.rst
remove the[unreleased]
caption from the page title. Note that, the Iris version and release date are updated automatically when the documentation is builtReview the file for correctness
Work with the development team to populate the
Release Highlights
dropdown at the top of the file, which provides extra detail on notable changesUse
git
to add and commit all changes, including removal ofdev.rst.template
and update to thelatest.rst
symbolic link.
Update the
whatsnew
indexdocs/src/whatsnew/index.rst
Remove the reference to
dev.rst
Add a reference to
v1.9.rst
to the top of the list
Check your changes by building the documentation and reviewing
Once all the above steps are complete, the release is cut, using the Draft a new release button on the Iris release page
Post Release Steps
Check the documentation has built on Read The Docs. The build is triggered by any commit to
main
. Additionally check that the versions available in the pop out menu in the bottom left corner include the new release version. If it is not present you will need to configure the versions available in the admin dashboard in Read The Docs.Review the Active Versions for the
scitools-iris
project on Read The Docs to ensure that the appropriate versions areActive
and/orHidden
. To do thisEdit
the appropriate version e.g., see Editing v3.0.0rc0 (must be logged into Read the Docs).Merge back to
main