8662297517
We are at the point that all distributions we are building have Python 3, so any tools running in the chroot can assume Python 3 exists. This makes dib-python redundant; mark it as deprecated and start to remove it from elements where it is no longer required. Change-Id: I5d852843ec65d3b04444b77c54c5b82424455cd8
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1.3 KiB
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36 lines
1.3 KiB
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==========
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dib-python
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==========
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.. note::
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This element is deprecated. All distributions support Python 3 so
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tools running in the chroot can simply use ``/usr/bin/python3``.
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Adds a symlink to ``/usr/local/bin/dib-python`` which points at either a
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``python2`` or ``python3`` executable as appropriate.
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In-chroot scripts should use this as their interpreter
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(``#!/usr/local/bin/dib-python``) to make scripts that are compatible
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with both ``python2`` and ``python3``. We can not assume
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``/usr/bin/python`` exists, as some platforms have started shipping with
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only Python 3.
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``DIB_PYTHON`` will be exported as the python interpreter. You should
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use this instead of ``python script.py`` (e.g. ``${DIB_PYTHON}
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script.py``). Note you can also call ``/usr/local/bin/dib-python
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script.py`` but in some circumstances, such as creating a ``virtualenv``,
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it can create somewhat confusing references to ``dib-python`` that
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remain in the built image.
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This does not install a python if one does not exist, and instead fails.
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This also exports a variable ``DIB_PYTHON_VERSION`` which will either be
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'2' or '3' depending on the python version which dib-python points to.
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.. note::
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The ``dib-python`` interpreter will be removed in ``cleanup.d``. It
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is only intended for build scripts.
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