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|
===========
dh-python
===========
``dh-python`` provides various tools that help packaging Python related files
in Debian.
* ``pybuild`` is a tool that implements ``dh`` sequencer's ``dh_auto_foo``
commands (but it can be used outside ``dh`` as well). It builds and installs
files.
* ``dh_python3`` is a tool that takes what ``pybuild`` produces and
generates runtime dependencies and maintainer scripts.
It fixes some common mistakes, like installing files into
``site-packages`` instead of ``dist-packages``, ``/usr/local/bin/``
shebangs, removes ``.py`` files from ``-dbg`` packages, etc.)
To translate ``requires.txt`` (a file installed in
``dist-packages/foo.egg-info/``) into Debian dependencies, a list of
packages that provide given egg distribution is used. If the dependency
is not found there, ``dpkg -S`` is used (i.e. a given dependency has to be
installed; you need it in ``Build-Depends`` in order to run tests anyway).
See *dependencies* section in ``dh_python3``'s manpage for more details.
* ``dh_python3`` works on ``./debian/python3-foo/`` files and other binary
packages that have ``${python3:Depends}`` in the ``Depends`` field.
It ignores Python 2.X and PyPy2 specific directories.
See ``dh_python3`` manpage for more details.
How it works
============
A simplified work flow looks like this:
.. code:: python
# dh_auto_clean stage
for interpreter in REQUESTED_INTERPRETERS:
for version in interpreter.REQUESTED_VERSIONS:
PYBUILD_BEFORE_CLEAN
pybuild --clean
PYBUILD_AFTER_CLEAN
plenty_of_other_dh_foo_tools_invoked_here
# dh_auto_configure stage
for interpreter in REQUESTED_INTERPRETERS:
for version in interpreter.REQUESTED_VERSIONS:
PYBUILD_BEFORE_CONFIGURE
pybuild --configure
PYBUILD_AFTER_CONFIGURE
plenty_of_other_dh_foo_tools_invoked_here
# dh_auto_build stage
for interpreter in REQUESTED_INTERPRETERS:
for version in interpreter.REQUESTED_VERSIONS:
PYBUILD_BEFORE_BUILD
pybuild --build
PYBUILD_AFTER_BUILD
plenty_of_other_dh_foo_tools_invoked_here
# dh_auto_test stage
for interpreter in REQUESTED_INTERPRETERS:
for version in interpreter.REQUESTED_VERSIONS:
PYBUILD_BEFORE_TEST
pybuild --test
PYBUILD_AFTER_TEST
plenty_of_other_dh_foo_tools_invoked_here
# dh_auto_install stage
for interpreter in REQUESTED_INTERPRETERS:
for version in interpreter.REQUESTED_VERSIONS:
PYBUILD_BEFORE_INSTALL
pybuild --install
PYBUILD_AFTER_INSTALL
plenty_of_other_dh_foo_tools_invoked_here
dh_python3
plenty_of_other_dh_foo_tools_invoked_here
pybuild --$step
---------------
This command is auto-detected, it currently supports distutils, autotools,
cmake and a custom build system where you can define your own set of
commands. Why do we need it? ``dh_auto_foo`` doesn't know each command has to
be invoked for each interpreter and version.
REQUESTED_INTERPRETERS
----------------------
is parsed from ``Build-Depends`` if ``--buildsystem=pybuild`` is set. If it's
not, you have to pass ``--interpreter`` to ``pybuild`` (more in its manpage)
* ``python3-all{,-dev}`` - all CPython interpreters (for packages that
provide public modules / extensions)
* ``python3-all-dbg`` - all CPython debug interpreters (if ``-dbg`` package
is provided)
* ``python3`` - default CPython or closest to default interpreter only (use
this if you build a Python application)
* ``python3-dbg`` - default CPython debug (or closest to the default one)
only
REQUESTED_VERSIONS
------------------
is parsed from ``X-Python3-Version`` and ``Build-Depends``.
BEFORE and AFTER commands
-------------------------
can be different for each interpreter and/or version, examples:
* ``PYBUILD_AFTER_BUILD_python3.5=rm {destdir}/{build_dir}/foo/bar2X.py``
* ``PYBUILD_BEFORE_INSTALL_python3=touch {destdir}/{install_dir}/foo/bar/__init__.py``
These commands should be used only if overriding ``dh_auto_foo`` is not enough
(example below)
.. code::
override_dh_auto_install:
before_auto_install_commands
dh_auto_install
after_auto_install_commands
See the ``pybuild`` manpage for more details (search for ``BUILD SYSTEM ARGUMENTS``)
overrides
---------
How to override ``pybuild`` autodetected options:
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
* Each ``pybuild`` call can be disabled (for given interpreter, version or
stage). See the ``pybuild`` manpage for more details (search for
``--disable`` description).
* You can pass options in ``override_dh_auto_foo`` via command line options:
.. code::
dh_auto_test -- --system=custom --test-args='{interpreter} setup.py test'
or env. variables:
.. code::
PYBUILD_SYSTEM=custom PYBUILD_TEST_ARGS='{interpreter} setup.py test' dh_auto_test
* You can export env. variables globally at the beginning of debian/rules
.. code::
export PYBUILD_TEST_ARGS={dir}/tests/
How to override dh_python3 options:
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
* via command line, f.e.
.. code::
override_dh_python3:
dh_python3 --shebang=/usr/bin/python3
|
