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Metadata-Version: 1.1
Name: vcversioner
Version: 2.16.0.0
Summary: Use version control tags to discover version numbers
Home-page: https://github.com/habnabit/vcversioner
Author: Aaron Gallagher
Author-email: _@habnab.it
License: ISC
Description: .. image:: https://travis-ci.org/habnabit/vcversioner.png
        
        ===========
        vcversioner
        ===========
        
        `Elevator pitch`_: you can write a ``setup.py`` with no version information
        specified, and vcversioner will find a recent, properly-formatted VCS tag and
        extract a version from it.
        
        It's much more convenient to be able to use your version control system's
        tagging mechanism to derive a version number than to have to duplicate that
        information all over the place. I eventually ended up copy-pasting the same
        code into a couple different ``setup.py`` files just to avoid duplicating
        version information. But, copy-pasting is dumb and unit testing ``setup.py``
        files is hard. This code got factored out into vcversioner.
        
        
        Basic usage
        -----------
        
        vcversioner installs itself as a setuptools hook, which makes its use
        exceedingly simple::
        
          from setuptools import setup
        
          setup(
              # [...]
              setup_requires=['vcversioner'],
              vcversioner={},
          )
        
        The presence of a ``vcversioner`` argument automagically activates vcversioner
        and updates the project's version. The parameter to the ``vcversioner``
        argument can also be a dict of keyword arguments which |find_version|
        will be called with.
        
        To allow tarballs to be distributed without requiring a ``.git`` (or ``.hg``,
        etc.) directory, vcversioner will also write out a file named (by default)
        ``version.txt``. Then, if there is no VCS program or the program is unable to
        find any version information, vcversioner will read version information from
        the ``version.txt`` file. However, this file needs to be included in a
        distributed tarball, so the following line should be added to ``MANIFEST.in``::
        
          include version.txt
        
        This isn't necessary if ``setup.py`` will always be run from a checkout, but
        otherwise is essential for vcversioner to know what version to use.
        
        The name ``version.txt`` also can be changed by specifying the ``version_file``
        parameter. For example::
        
          from setuptools import setup
        
          setup(
              # [...]
              setup_requires=['vcversioner'],
              vcversioner={
                  'version_file': 'custom_version.txt',
              },
          )
        
        For compatibility with `semantic versioning`_, ``vcversioner`` will strip
        leading ``'v'``\ s  from version tags. That is, the tag ``v1.0`` will be
        treated as if it was ``1.0``.
        
        Other prefixes can be specified to be stripped by using the ``strip_prefix``
        argument to vcversioner. For compatibility with ``git-dch``, one could specify
        the ``strip_prefix`` as ``'debian/'``.
        
        
        Non-hook usage
        --------------
        
        It's not necessary to depend on vcversioner; while `pip`_ will take care of
        dependencies automatically, sometimes having a self-contained project is
        simpler. vcversioner is a single file which is easy to add to a project. Simply
        copy the entire ``vcversioner.py`` file adjacent to the existing ``setup.py``
        file and update the usage slightly::
        
          from setuptools import setup
          import vcversioner
        
          setup(
              # [...]
              version=vcversioner.find_version().version,
          )
        
        This is necessary because the ``vcversioner`` distutils hook won't be
        available.
        
        
        Version modules
        ---------------
        
        ``setup.py`` isn't the only place that version information gets duplicated. By
        generating a version module, the ``__init__.py`` file of a package can import
        version information. For example, with a package named ``spam``::
        
          from setuptools import setup
        
          setup(
              # [...]
              setup_requires=['vcversioner'],
              vcversioner={
                  'version_module_paths': ['spam/_version.py'],
              },
          )
        
        This will generate a ``spam/_version.py`` file that defines ``__version__`` and
        ``__revision__``. Then, in ``spam/__init__.py``::
        
          from spam._version import __version__, __revision__
        
        Since this acts like (and *is*) a regular python module, changing
        ``MANIFEST.in`` is not required.
        
        
        Customizing VCS commands
        ------------------------
        
        vcversioner by default tries to detect which VCS is being used and picks a
        command to run based on that. For git, that is ``git --git-dir %(root)s/.git
        describe --tags --long``. For hg, that is ``hg log -R %(root)s -r . --template
        '{latesttag}-{latesttagdistance}-hg{node|short}'``.
        
        Any command should output a string that describes the current commit in the
        format ``1.0-0-gdeadbeef``. Specifically, that is ``<version number>-<number of
        commits between the current commit and the version tagged commit>-<revision>``.
        The revision should have a VCS-specific prefix, e.g. ``g`` for git and ``hg``
        for hg.
        
        However, sometimes this isn't sufficient. If someone wanted to only use
        annotated tags, the git command could be amended like so::
        
          from setuptools import setup
        
          setup(
              # [...]
              setup_requires=['vcversioner'],
              vcversioner={
                  'vcs_args': ['git', 'describe', '--long'],
              },
          )
        
        The ``vcs_args`` parameter must always be a list of strings, which will not be
        interpreted by the shell. This is the same as what ``subprocess.Popen``
        expects.
        
        This argument used to be spelled ``git_args`` until support for multiple VCS
        systems was added.
        
        
        Development versions
        --------------------
        
        vcversioner can also automatically make a version that corresponds to a commit
        that isn't itself tagged. Following `PEP 386`_, this is done by adding a
        ``.post`` suffix to the version specified by a tag on an earlier commit. For
        example, if the current commit is three revisions past the ``1.0`` tag, the
        computed version will be ``1.0.post3``.
        
        This behavior can be disabled by setting the ``include_dev_version`` parameter
        to ``False``. In that case, the aforementioned untagged commit's version would
        be just ``1.0``.
        
        Since hg requires a commit to make a tag, there's a parameter
        ``decrement_dev_version`` to subtract one from the number of commits after the
        most recent tag. If the VCS used is detected to be hg (i.e. the revision starts
        with ``'hg'``) and ``decrement_dev_version`` is not specified as ``False``,
        ``decrement_dev_version`` will be automatically set to ``True``.
        
        
        Project roots
        -------------
        
        In order to prevent contamination from other source repositories, vcversioner
        in the 1.x version series will only look in the project root directory for
        repositories. The project root defaults to the current working directory, which
        is often the case when running setup.py. This can be changed by specifying the
        ``root`` parameter. Someone concerned with being able to run setup.py from
        directories other than the directory containing setup.py should determine the
        project root from ``__file__`` in setup.py::
        
          from setuptools import setup
          import os
        
          setup(
              # [...]
              setup_requires=['vcversioner'],
              vcversioner={
                  'root': os.path.dirname(os.path.abspath(__file__)),
              },
          )
        
        To get the same behavior in the 0.x version series, ``vcs_args`` can be set to
        include the ``--git-dir`` flag::
        
          from setuptools import setup
        
          setup(
              # [...]
              setup_requires=['vcversioner'],
              vcversioner={
                  vcs_args=['git', '--git-dir', '%(root)s/.git', 'describe',
                            '--tags', '--long'],
              },
          )
        
        By default, ``version.txt`` is also read from the project root.
        
        
        Substitutions
        ~~~~~~~~~~~~~
        
        As seen above, *root*, *version_file*, and *vcs_args* each support some
        substitutions:
        
        ``%(root)s``
          The value provided for *root*. This is not available for the *root*
          parameter itself.
        
        ``%(pwd)s``
          The current working directory.
        
        ``/`` will automatically be translated into the correct path separator for the
        current platform, such as ``:`` or ``\``.
        
        
        Sphinx documentation
        --------------------
        
        `Sphinx`_ documentation is yet another place where version numbers get
        duplicated. Fortunately, since sphinx configuration is python code, vcversioner
        can be used there too. Assuming vcversioner is installed system-wide, this is
        quite easy. Since Sphinx is typically run with the current working directory as
        ``<your project root>/docs``, it's necessary to tell vcversioner where the
        project root is. Simply change your ``conf.py`` to include::
        
          import vcversioner
          version = release = vcversioner.find_version(root='..').version
        
        This assumes that your project root is the parent directory of the current
        working directory. A slightly longer version which is a little more robust
        would be::
        
          import vcversioner, os
          version = release = vcversioner.find_version(
              root=os.path.dirname(os.path.dirname(os.path.abspath(__file__)))).version
        
        This version is more robust because it finds the project root not relative to
        the current working directory but instead relative to the ``conf.py`` file.
        
        If vcversioner is bundled with your project instead of relying on it being
        installed, you might have to add the following to your ``conf.py`` before
        ``import vcversioner``::
        
          import sys, os
          sys.path.insert(0, os.path.abspath('..'))
        
        This line, or something with the same effect, is sometimes already present when
        using the sphinx ``autodoc`` extension.
        
        
        Read the Docs
        ~~~~~~~~~~~~~
        
        Using vcversioner is even possible when building documentation on `Read the
        Docs`_. If vcversioner is bundled with your project, nothing further needs to
        be done. Otherwise, you need to tell Read the Docs to install vcversioner
        before it builds the documentation. This means using a ``requirements.txt``
        file.
        
        If your project is already set up to install dependencies with a
        ``requirements.txt`` file, add ``vcversioner`` to it. Otherwise, create a
        ``requirements.txt`` file. Assuming your documentation is in a ``docs``
        subdirectory of the main project directory, create ``docs/requirements.txt``
        containing a ``vcversioner`` line.
        
        Then, make the following changes to your project's configuration: (Project
        configuration is edited at e.g.
        https://readthedocs.org/dashboard/vcversioner/edit/)
        
        - Check the checkbox under **Use virtualenv**.
        - If there was no ``requirements.txt`` previously, set the **Requirements
          file** to the newly-created one, e.g. ``docs/requirements.txt``.
        
        
        .. _Elevator pitch: http://en.wikipedia.org/wiki/Elevator_pitch
        .. _pip: https://pypi.python.org/pypi/pip
        .. _PEP 386: http://www.python.org/dev/peps/pep-0386/
        .. _Sphinx: http://sphinx-doc.org
        .. _Read the Docs: https://readthedocs.org/
        .. _semantic versioning: http://semver.org/
        
        .. |find_version| replace:: ``find_version``
        
Platform: UNKNOWN
Classifier: Development Status :: 3 - Alpha
Classifier: Intended Audience :: Developers
Classifier: License :: OSI Approved :: ISC License (ISCL)
Classifier: Operating System :: OS Independent
Classifier: Programming Language :: Python :: 2
Classifier: Programming Language :: Python :: 2.6
Classifier: Programming Language :: Python :: 2.7
Classifier: Programming Language :: Python :: 3
Classifier: Programming Language :: Python :: 3.3
Classifier: Programming Language :: Python :: 3.4
Classifier: Programming Language :: Python :: 3.5
Classifier: Topic :: Software Development :: Version Control