the blessed package to manage your versions by scm tags
Project description
setuptools_scm handles managing your Python package versions in SCM metadata instead of declaring them as the version argument or in a SCM managed file.
It also handles file finders for the supported SCMs.
setup.py usage
To use setuptools_scm just modify your project’s setup.py file like this:
Add setuptools_scm to the setup_requires parameter.
Add the use_scm_version parameter and set it to True.
For example:
from setuptools import setup
setup(
...,
use_scm_version=True,
setup_requires=['setuptools_scm'],
...,
)Arguments to get_version() (see below) may be passed as a dictionary to use_scm_version. For example:
from setuptools import setup
setup(
...,
use_scm_version = {"root": "..", "relative_to": __file__},
setup_requires=['setuptools_scm'],
...,
)Once configured, you can access the version number in your package via pkg_resources (PEP-0396). For example:
from pkg_resources import get_distribution, DistributionNotFound
try:
__version__ = get_distribution(__name__).version
except DistributionNotFound:
# package is not installed
passYou can also confirm the version number locally via setup.py:
$ python setup.py --versionsetup.cfg
If using setuptools 30.3.0 or greater, you can store setup_requires configuration in setup.cfg. However, use_scm_version must still be placed in setup.py. For example:
# setup.py
from setuptools import setup
setup(
use_scm_version=True,
)# setup.cfg
[metadata]
...
[options]
setup_requires =
setuptools_scm
...You may also need to define a pyproject.toml file (PEP-0518) to ensure you have the required version of setuptools:
# pyproject.toml
[build-system]
requires = ["setuptools>=30.3.0", "wheel", "setuptools_scm"]For more information, refer to the setuptools issue #1002.
Programmatic usage
In order to use setuptools_scm from code that is one directory deeper than the project’s root, you can use:
from setuptools_scm import get_version
version = get_version(root='..', relative_to=__file__)See setup.py Usage above for how to use this within setup.py.
Usage from Sphinx
It is discouraged to use setuptools_scm from Sphinx itself, instead use pkg_resources after editable/real installation:
# contents of docs/conf.py
from pkg_resources import get_distribution
release = get_distribution('myproject').version
# for example take major/minor
version = '.'.join(release.split('.')[:2])The underlying reason is, that services like Read the Docs sometimes change the working directory for good reasons and using the installed metadata prevents using needless volatile data there.
Notable Plugins
- setuptools_scm_git_archive
Provides partial support for obtaining versions from git archives that belong to tagged versions. The only reason for not including it in setuptools_scm itself is Git/GitHub not supporting sufficient metadata for untagged/followup commits, which is preventing a consistent UX.
Default versioning scheme
In the standard configuration setuptools_scm takes a look at three things:
latest tag (with a version number)
the distance to this tag (e.g. number of revisions since latest tag)
workdir state (e.g. uncommitted changes since latest tag)
and uses roughly the following logic to render the version:
- no distance and clean:
{tag}
- distance and clean:
{next_version}.dev{distance}+{scm letter}{revision hash}
- no distance and not clean:
{tag}+dYYYMMMDD
- distance and not clean:
{next_version}.dev{distance}+{scm letter}{revision hash}.dYYYMMMDD
The next version is calculated by adding 1 to the last numeric component of the tag.
For Git projects, the version relies on git describe, so you will see an additional g prepended to the {revision hash}.
Semantic Versioning (SemVer)
Due to the default behavior it’s necessary to always include a patch version (the 3 in 1.2.3), or else the automatic guessing will increment the wrong part of the SemVer (e.g. tag 2.0 results in 2.1.devX instead of 2.0.1.devX). So please make sure to tag accordingly.
Builtin mechanisms for obtaining version numbers
the SCM itself (git/hg)
.hg_archival files (mercurial archives)
PKG-INFO
Configuration parameters
In order to configure the way use_scm_version works you can provide a mapping with options instead of a boolean value.
The currently supported configuration keys are:
- root:
Relative path to cwd, used for finding the SCM root; defaults to .
- version_scheme:
Configures how the local version number is constructed; either an entrypoint name or a callable.
- local_scheme:
Configures how the local component of the version is constructed; either an entrypoint name or a callable.
- write_to:
A path to a file that gets replaced with a file containing the current version. It is ideal for creating a version.py file within the package, typically used to avoid using pkg_resources.get_distribution (which adds some overhead).
- write_to_template:
A newstyle format string that is given the current version as the version keyword argument for formatting.
- relative_to:
A file from which the root can be resolved. Typically called by a script or module that is not in the root of the repository to point setuptools_scm at the root of the repository by supplying __file__.
- parse:
A function that will be used instead of the discovered SCM for parsing the version. Use with caution, this is a function for advanced use, and you should be familiar with the setuptools_scm internals to use it.
- tag_regex:
A Python regex string to extract the version part from any SCM tag. The regex needs to contain three named groups prefix, version and suffix, where version captures the actual version information.
Defaults to the value of setuptools_scm.config.DEFAULT_TAG_REGEX (see config.py).
- git_describe_command:
This command will be used instead the default git describe command. Use with caution, this is a function for advanced use, and you should be familiar with the setuptools_scm internals to use it.
Defaults to the value set by setuptools_scm.git.DEFAULT_DESCRIBE (see git.py).
To use setuptools_scm in other Python code you can use the get_version function:
from setuptools_scm import get_version
my_version = get_version()It optionally accepts the keys of the use_scm_version parameter as keyword arguments.
Example configuration in setup.py format:
from setuptools import setup
setup(
use_scm_version={
'write_to': 'version.txt',
'tag_regex': r'^(?P<prefix>v)?(?P<version>[^\+]+)(?P<suffix>.*)?$',
}
)Environment variables
- SETUPTOOLS_SCM_PRETEND_VERSION:
when defined and not empty, its used as the primary source for the version number in which case it will be a unparsed string
- SETUPTOOLS_SCM_DEBUG:
when defined and not empty, a lot of debug information will be printed as part of setuptools_scm operating
Extending setuptools_scm
setuptools_scm ships with a few setuptools entrypoints based hooks to extend its default capabilities.
Adding a new SCM
setuptools_scm provides two entrypoints for adding new SCMs:
- setuptools_scm.parse_scm
A function used to parse the metadata of the current workdir using the name of the control directory/file of your SCM as the entrypoint’s name. E.g. for the built-in entrypoint for git the entrypoint is named .git and references setuptools_scm.git:parse
The return value MUST be a setuptools.version.ScmVersion instance created by the function setuptools_scm.version:meta.
- setuptools_scm.files_command
Either a string containing a shell command that prints all SCM managed files in its current working directory or a callable, that given a pathname will return that list.
Also use then name of your SCM control directory as name of the entrypoint.
Version number construction
- setuptools_scm.version_scheme
Configures how the version number is constructed given a setuptools.version.ScmVersion instance and should return a string representing the version.
Available implementations:
- guess-next-dev:
automatically guesses the next development version (default)
- post-release:
generates post release versions (adds
postN)
- setuptools_scm.local_scheme
Configures how the local part of a version is rendered given a setuptools.version.ScmVersion instance and should return a string representing the local version.
Available implementations:
- node-and-date:
adds the node on dev versions and the date on dirty workdir (default)
- node-and-timestamp:
like node-and-date but with a timestamp of the form {:%Y%m%d%H%M%S} instead
- dirty-tag:
adds +dirty if the current workdir has changes
Importing in setup.py
To support usage in setup.py passing a callable into use_scm_version is supported.
Within that callable, setuptools_scm is available for import. The callable must return the configuration.
# content of setup.py
import setuptools
def myversion():
from setuptools_scm.version import get_local_dirty_tag
def clean_scheme(version):
return get_local_dirty_tag(version) if version.dirty else '+clean'
return {'local_scheme': clean_scheme}
setup(
...,
use_scm_version=myversion,
...
)Note on testing non-installed versions
While the general advice is to test against a installed version, some environments require a test prior to install,
$ python setup.py egg_info
$ PYTHONPATH=$PWD:$PWD/src pytestCode of Conduct
Everyone interacting in the setuptools_scm project’s codebases, issue trackers, chat rooms, and mailing lists is expected to follow the PyPA Code of Conduct.
Release history Release notifications | RSS feed
Download files
Download the file for your platform. If you're not sure which to choose, learn more about installing packages.
Source Distribution
Built Distributions
Hashes for setuptools_scm-3.2.0-py2.py3-none-any.whl
| Algorithm | Hash digest | |
|---|---|---|
| SHA256 | 057a67cb0a33e0f95edd828e47809f49b7104f4bc333a98fd35d4d05738c6187 |
|
| MD5 | e37c88a099aa07025651f0d6c6dd1527 |
|
| BLAKE2b-256 | b296f537589108b88168463bdc73421b064a3790d0476ad6be362a3539a30db6 |
