13.2.7. Package versioning

NextGIS Web itself and most extension packages use bump2version to manage versions. Here is the sample configuration file .bumpversion.cfg, which should be placed next to setup.py:

[bumpversion]
current_version = 1.0.0.dev0
parse = (?P<major>\d+)\.(?P<minor>\d+)\.(?P<patch>\d+)(\.(?P<release>[a-z]+)(?P<dev>\d+))?
serialize =
  {major}.{minor}.{patch}.{release}{dev}
  {major}.{minor}.{patch}
tag_name = {new_version}
message = Bump version to {new_version}
commit = False
tag = False

[bumpversion:part:release]
optional_value = release
values =
  dev
  release

[bumpversion:part:dev]

[bumpversion:file:VERSION]

This configuration provides PEP 440 compatible version numbers, which consist of major, minor, patch and dev parts. And the special part release separates release and development versions.

The current version is stored in bumpversion.cfg and VERSION files. In setup.py Python package version should be read from VERSION like this:

from setuptools import setup

with open('VERSION', 'r') as fd:
    VERSION = fd.read().rstrip()

setup(
    name='nextgisweb_foo',
    version=VERSION,
    # ...
)

Bump2version provides tools for incrementing version parts and for updation files where it is stored. If the current version is 4.3.2.dev1 incrementing different parts will with bump2version part lead to the following results: major → 5.0.0.dev0, minor → 4.4.0.dev0, patch → 4.3.3.dev0, dev → 4.3.2.dev2, release → 4.3.2

As you see, it increments the given part and sets the following parts to zero. Incrementing of release part just drops .devX suffix (actually it becomes .release0 but this part is declared as optional).

13.2.7.1. Package configuration

Decide which version is the current, 1.0.0.dev0 in the example.
Create .bumpversion.cfg file from the template above.
Create VERSION text file and place the current version there.
Adapt setup.py with the example above.

13.2.7.2. Development versions

Incrementing dev version part is helpful in dependencies between packages. Imagine you have added some function in nextgisweb core package and now you want to use it in the extension package.

So, in nextgisweb package:

$ cd package/nextgisweb
$ cat VERSION
3.8.0.dev0
$ bump2version --commit dev
$ cat VERSION
3.8.0.dev1

In the extension package nextgisweb_foo you can use this version in requirements in setup.py:

from setuptools import setup

setup(
    name='nextgisweb_foo',
    version=VERSION,
    # ...
    install_requires=[
        'nextgisweb>=3.8.0.dev1',
    ],
    # ...
)

This prevents installation and usage of nextgisweb_foo package when nextgisweb version is lower than 3.8.0.dev1.

Note

The 3.8.0.dev1 version in lower than 3.8.0 and higher than 3.7.0.

It’s also possible to increment the version during git merge, for example:

$ cd package/nextgisweb
$ cat VERSION
3.8.0.dev1
$ git merge --no-commit some-feature-branch
$ bump2version --allow-dirty dev
$ cat VERSION
3.8.0.dev2
$ git add VERSION .bumpversion.cfg
$ git commit

13.2.7.3. Release versions

To create release version use the following commands:

$ cd package/nextgisweb
$ cat VERSION
3.8.0.dev2
$ bump2version --commit --tag release
$ cat VERSION
3.8.0

Then start new minor (or major) version:

$ bump2version --commit minor
$ cat VERSION
3.9.0.dev0

And push tags to remote repository:

$ git push --tags origin master

13.2.7.4. Backports and patches

Sometimes it’s required to backport critical bug fixes to previous major and minor versions. These fixes should be done in a separate branch. So if it doesn’t exist, create it from a tag:

$ git checkout 3.8.0
$ git branch 3.8.x

After that start new development version:

$ bump2version --commit patch
$ cat VERSION
3.8.1.dev0

Then use git cherry-pick to backport required commit and increment patch version component:

$ git cherry-pick commit-hash

And then create a new release version and push it to the repository:

$ bump2version --commit --tag release
$ git push --tag origin 3.8.x