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==========================
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Using ``bzr version-info``
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==========================
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This document describes ways of using ``bzr version-info`` as part of a
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build process to embed version information into a final project.
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TODO: Figure out how to attach into ``setup.py``
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Exporting version information
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=============================
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Getting the last revision number
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--------------------------------
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If you only need the last revision number in your build scripts, you can
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use the ``revno`` command to get that value like this::
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Getting more version information
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--------------------------------
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The ``version-info`` command can be used to output more information
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about the latest version like this::
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revision-id: pqm@pqm.ubuntu.com-20071211175118-s94sizduj201hrs5
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date: 2007-12-11 17:51:18 +0000
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build-date: 2007-12-13 13:14:51 +1000
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You can easily filter that output using operating system tools or
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scripts. For example (on Linux/Unix)::
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$ bzr version-info | grep ^date
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date: 2007-12-11 17:51:18 +0000
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The ``--all`` option will actually dump version information about
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every revision if you need that information for more advanced
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.. TODO: Figure out how to attach into ``setup.py``
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If using a Makefile to build your project, you can generate the version
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information file as simply as::
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library/_version.py:
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bzr version-info --format=python > library/_version.py
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bzr version-info --format python > library/_version.py
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This generates a file which contains 3 dictionaries:
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map. This is also empty by default, and enabled only by ``--all``
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or ``--include-file-revisions``.
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Getting version info in other formats
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-------------------------------------
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Bazaar supports a template-based method for getting version information in
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arbitrary formats. The ``--custom`` option to ``version-info`` can be
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used by providing a ``--template`` argument that contains variables that
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will be expanded based on the status of the working tree. For example, to
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generate a C header file with a formatted string containing the current
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bzr version-info --custom \
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--template="#define VERSION_INFO \"Project 1.2.3 (r{revno})\"\n" \
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where the ``{revno}`` will be replaced by the revision number of the
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working tree. (If the example above doesn't work on your OS, try
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entering the command all on one line.) For more information on the
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variables that can be used in templates, see `Version Info`_ in the
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Bazaar User Reference.
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.. _Version Info: ../user-reference/bzr_man.html#version-info
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Predefined formats for dumping version information in specific languages
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are currently in development. Please contact us on the mailing list about
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your requirements in this area.
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Most information about the contents of the project can be cheaply
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determined by just reading the revision entry. However, it can be useful