##########################
Creating Releases of PyCBC
##########################

.. note::

    Only authorized maintainers of PyCBC should use these instructions.


==============================
Creating the release on GitHub
==============================

To create a new PyCBC release:

#. Make sure that the setup.py file contains the correct version number, which should be in the format ``x.y.z`` (where x, y, and z are the major, minor, and patch levels of the release) in PyCBC's setup.py file.
#. Set ``release = True`` in the PyCBC's setup.py file.
#. Commit the changed setup.py file and push to commit to the repository.
#. Go to the `PyCBC release page <https://github.com/ligo-cbc/pycbc/releases>`_ and click on ``Draft a new release``. 
#. Enter a tag version in the format ``vx.y.z``. Note the ``v`` in front of the major, minor, and patch numbers. 
#. Enter a descriptive release title and write a desciption of the release in the text box provided.
#. Click on ``Publish release`` to create the release.
#. Update the setup.py file with an incremented major or minor version number and make sure that the string ``dev`` appears in that version. For example, if you just released ``1.2.1`` then change the string to ``1.3.dev0`` or ``2.0.dev0`` as appropriate. This is needed to ensure that if someone is building from source, it always takes precedence over an older release version.
#. Set ``release = False`` in PyCBC's setup.py file.
#. Commit these changes and push them to the repository.

.. note::

    Releases of PyCBC should be made from the master. Do not make a branch
    unless you are back-porting a bug fix from a new release series to an
    old production release series.

Creating the release will trigger a Travis build that updates CVMFS, Docker, and PyPI with the release.

------------------------------------------------
Backporting Bug Fixes to Previous Release Series
------------------------------------------------

Branches should only be created when bug fixes from master need to be back
ported to an old release series (e.g. adding a bug fix from the 1.4 series to
the 1.3 series. 

To create a branch for the bug fix, make a new branch from the last release
tag and cherry pick the changes to that branch. For example, to create a
``1.3.8`` branch to add bug fixes to the ``1.3.7`` release, you should

.. code:: bash

  git checkout -b b1.3.8 v1.3.7
  git cherry-pick [hash of first change]
  git cherry-pick [hash of second change]
  [continue using git cherry-pick for all new changes]
  git commit
  git push

Then go to the `PyCBC release page <https://github.com/ligo-cbc/pycbc/releases>`_ and click on ``Draft a new release`` following the instructions above.