Release Guide

This document is only relevant for Matplotlib release managers.

A guide for developers who are doing a Matplotlib release.

Note

This assumes that a read-only remote for the canonical repository is remote and a read/write remote is DANGER

All Releases

Testing

We use travis-ci for continuous integration. When preparing for a release, the final tagged commit should be tested locally before it is uploaded:

pytest -n 8 .

In addition the following test should be run and manually inspected:

python unit/memleak.py agg agg.pdf

In addition the following should be run and manually inspected, but is currently broken:

pushd examples/tests/
python backend_driver_sgskip.py
popd

GitHub Stats

We automatically extract GitHub issue, PRs, and authors from GitHub via the API. copy the current github_stats.rst to github_stats_X.Y.Z.rst.

To re-generate the updated

python tools/github_stats.py --since-tag v2.2.0 --milestone=v3.0 --project 'matplotlib/matplotlib' --links > doc/users/github_stats.rst

Review and commit changes. Some issue/PR titles may not be valid rst (the most common issue is * which is interpreted as unclosed markup).

Update and Validate the Docs

Merge the most recent 'doc' branch (v3.0.2-doc) into the branch you are going to tag on and delete the doc branch on GitHub.

Before tagging, update the "what's new" and "API changes" listings.

for the "what's new"

  1. copy the current content to a file in doc/users/prev_whats_new
  2. merge all of the files in doc/users/next_whats_new/ into doc/users/whats_new.rst and delete the individual files
  3. comment out the next whats new glob at the top

Similarly for the "API changes"

  1. copy the current api changes to a file is doc/api/prev_api_changes
  2. merge all of the files in doc/api/next_api_changes/ into doc//whats_new.rst
  3. comment out the next API changes at the top.

In both cases step 3 will have to be un-done right after the release.

Finally, make sure that the docs build cleanly

make -Cdoc O=-j$(nproc) html latexpdf

After the docs are built, check that all of the links, internal and external, are still valid. We use linkchecker for this, which has not been ported to python3 yet. You will need to create a python2 environment with requests==2.9.0 and linkchecker

conda create -p /tmp/lnkchk python=2 requests==2.9.0
source activate /tmp/lnkchk
pip install linkchecker
pushd doc/build/html
linkchecker index.html --check-extern
popd

Address any issues which may arise. The internal links are checked on travis, this should only flag failed external links.

Create release commit and tag

To create the tag, first create an empty commit with a very terse set of the release notes in the commit message

git commit --allow-empty

and then create a signed, annotated tag with the same text in the body message

git tag -a -s v2.0.0

which will prompt you for your gpg key password and an annotation. For pre releases it is important to follow PEP 440 so that the build artifacts will sort correctly in pypi. Finally, push the tag to GitHub

git push -t DANGER v2.0.0

Congratulations, the scariest part is done!

To prevent issues with any down-stream builders which download the tarball from GitHub it is important to move all branches away from the commit with the tag [1]:

git commit --allow-empty
git push DANGER master
[1]

The tarball that is provided by GitHub is produced using git archive. We use versioneer which uses a format string in lib/matplotlib/_version.py to have git insert a list of references to exported commit (see .gitattributes for the configuration). This string is then used by versioneer to produce the correct version, based on the git tag, when users install from the tarball. However, if there is a branch pointed at the tagged commit, then the branch name will also be included in the tarball. When the branch eventually moves, anyone how checked the hash of the tarball before the branch moved will have an incorrect hash.

To generate the file that GitHub does use

git archive v2.0.0 -o matplotlib-2.0.0.tar.gz --prefix=matplotlib-2.0.0/

If this is a final release, also create a 'doc' branch (this is not done for pre-releases):

git branch v2.0.0-doc
git push DANGER v2.0.0-doc

and if this is a major or minor release, also create a bug-fix branch (a micro release will be cut off of this branch):

git branch v2.0.x

On this branch un-comment the globs from Update and Validate the Docs. And then

git push DANGER v2.0.x

Release Management / DOI

Via the GitHub UI, turn the newly pushed tag into a release. If this is a pre-release remember to mark it as such.

For final releases also get a DOI from zenodo and edit doc/citing.rst with DOI link and commit to the VER-doc branch and push to GitHub

git checkout v2.0.0-doc
emacs doc/_templates/citing.html
git push DANGER v2.0.0-doc:v2.0.0-doc

Building binaries

We distribute mac, windows, and many linux wheels as well as a source tarball via pypi. Before uploading anything, contact the various builders. Mac and manylinux wheels are built on travis . You need to edit the .travis.yml file and push to the correct branch of the build project. For new minor versions create a new branch, for bug-fixes continue to use the current release branch.

The auto-tick bot should open a pull request into the conda-forge feedstock. Review and merge (if you have the power to).

Warning

Because this is automated, it is extremely important to bump all branches away from the tag as discussed in Create release commit and tag.

If this is a final release the following downstream packagers should be contacted:

  • Debian
  • Fedora
  • Arch
  • Gentoo
  • Macports
  • Homebrew
  • Christoph Gohlke
  • Continuum
  • Enthought

This can be done ahead of collecting all of the binaries and uploading to pypi.

make distribution and upload to pypi / SF

Once you have collected all of the wheels (expect this to take about a day), generate the tarball

git checkout v2.0.0
git clean -xfd
python setup.py sdist

and copy all of the wheels into dist directory. You should use twine to upload all of the files to pypi

twine upload -s dist/matplotlib*tar.gz
twine upload dist/*whl

Congratulations, you have now done the second scariest part!

Additionally, for a final release, upload all of the files to sourceforge.

Build and Deploy Documentation

To build the documentation you must have the tagged version installed, but build the docs from the ver-doc branch. An easy way to arrange this is:

pip install matplotlib
pip install -r requirements/doc/doc-requirements.txt
git checkout v2.0.0-doc
git clean -xfd
cd doc
make O=-n$(nproc) html latexpdf

which will build both the html and pdf version of the documentation.

The built documentation exists in the matplotlib.github.com repository. Pushing changes to master automatically updates the website.

The documentation is organized by version. At the root of the tree is always the documentation for the latest stable release. Under that, there are directories containing the documentation for older versions. The documentation for current master are built on travis and push to the devdocs repository. These are available at matplotlib.org/devdocs.

Assuming you have this repository checked out in the same directory as matplotlib

cd ../matplotlib.github.com
mkdir 2.0.0
rsync -a ../matplotlib/doc/build/html/* 2.0.0
cp ../matplotlib/doc/build/latex/Matplotlib.pdf 2.0.0

which will copy the built docs over. If this is a final release, also replace the top-level docs

rsync -a 2.0.0/* ./

You will need to manually edit versions.html to show the last 3 tagged versions. Now commit and push everything to GitHub

git add *
git commit -a -m 'Updating docs for v2.0.0'
git push DANGER master

Congratulations you have now done the third scariest part!

If you have access, clear the cloudflare caches.

It typically takes about 5-10 minutes for GitHub to process the push and update the live web page (remember to clear your browser cache).

Announcing

The final step is to announce the release to the world. A short version of the release notes along with acknowledgments should be sent to

For final releases announcements should also be sent to the numpy/scipy/scikit-image mailing lists.

In addition, announcements should be made on social networks (twitter via the @matplotlib account, any other via personal accounts). NumFOCUS should be contacted for inclusion in their newsletter.