kopia lustrzana https://github.com/jupyterhub/repo2docker
96 wiersze
2.9 KiB
ReStructuredText
96 wiersze
2.9 KiB
ReStructuredText
.. _languages:
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=====================================
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Choose languages for your environment
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=====================================
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You can define many different languages in your configuration files. This
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page describes how to use some of the more common ones.
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Python
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======
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Your environment will have Python (and specified dependencies) installed when
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you use one of the following configuration files:
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* ``requirements.txt``
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* ``environment.yml``
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.. note::
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By default, the environment will have |default_python|.
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.. versionchanged:: 0.8
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Upgraded default Python from 3.6 to 3.7.
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Specifying a version of Python
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------------------------------
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To specify a specific version of Python, you have two options:
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* Use :ref:`environment.yml <environment.yml>`. Conda environments let you define
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the Python version in ``environment.yml``.
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To do so, add ``python=X.X`` to your dependencies section, like so::
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name: python 2.7
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dependencies:
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- python=2.7
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- numpy
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* Use :ref:`runtime.txt <runtime.txt>` with :ref:`requirements.txt <requirements.txt>`.
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If you are using ``requirements.txt`` instead of ``environment.yml``,
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you can specify the Python runtime version in a separate file called ``runtime.txt``.
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This file contains a single line of the following form::
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python-X.X
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For example::
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python-3.6
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The R Language
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==============
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To ensure that R is installed, you must specify a version of R in a ``runtime.txt``
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file. This takes the following form::
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r-YYYY-MM-DD
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The date corresponds to the state of the MRAN repository at this day. Make sure
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that you choose a day with the desired version of your packages. For example,
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to use the MRAN repository on January 1st, 2018, add this line to ``runtime.txt``::
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r-2018-01-01
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Note that to install specific packages with the R environment, you should
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use the ``install.R`` configuration file.
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Julia
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=====
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To build an environment with Julia, include a configuration file called
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``Project.toml``. The format of this file is documented at
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`the Julia Pkg.jl documentation <https://julialang.github.io/Pkg.jl/v1/>`_.
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To specify a specific version of Julia to install, put a Julia version in the
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``[compat]`` section of the ``Project.toml`` file, as described
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here: https://julialang.github.io/Pkg.jl/v1/compatibility/.
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Languages not covered here
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==========================
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If a language is not "officially" supported by a build pack, it can often be
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installed with a ``postBuild`` script. This will run arbitrary ``bash`` commands,
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and can be used to download / install a language.
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Using multiple languages at once
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================================
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It may also be possible to combine multiple languages in a single environment.
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The details on how to accomplish this with all possible combinations are outside
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the scope of this guide. However we recommend that you take a look at the
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`Multi-Language Demo <https://github.com/binder-examples/multi-language-demo>`_
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repository for some inspiration.
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