You can not select more than 25 topics Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
 
 

2.7 KiB

<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en"> <head> </head>

Common basics

System Message: ERROR/3 (<stdin>, line 5)

Unknown directive type "highlight".

.. highlight:: bash

The various eclasses in python-r1 try to follow a single design. You will probably use more than one of them, so it is worthwhile to shortly explain the common bits used by all of them, as well as the non-obvious differences between them.

System Message: ERROR/3 (<stdin>, line 13)

Unknown directive type "index".

.. index:: PYTHON_COMPAT

PYTHON_COMPAT

The PYTHON_COMPAT variable is used by all Python eclasses, and must be declared in all ebuilds before they are inherited. It specifies the list of Python implementations supported by the package.

The valid values are:

  • pythonX_Y for CPython X.Y

  • pypy3 for PyPy3.

Typical use:

PYTHON_COMPAT=( python3_{6,7,8} pypy3 )
inherit python-single-r1

System Message: ERROR/3 (<stdin>, line 32)

Unknown directive type "index".

.. index:: PYTHON_DEPS

System Message: ERROR/3 (<stdin>, line 33)

Unknown directive type "index".

.. index:: PYTHON_REQUIRED_USE

PYTHON_DEPS and PYTHON_REQUIRED_USE

The python-any-r1, python-single-r1 and python-r1 eclasses all assume that the developer is responsible for explicitly putting the dependency strings and USE requirements in correct variables. This is meant to consistently cover packages that use Python unconditionally and conditionally, at build time and at runtime.

For python-single-r1 and python-r1, the most basic form to use Python unconditionally is to define the following:

REQUIRED_USE=${PYTHON_REQUIRED_USE}

RDEPEND=${PYTHON_DEPS}
BDEPEND=${RDEPEND}

For python-any-r1, only build-time dependencies are used:

BDEPEND=${PYTHON_DEPS}

This does not apply to distutils-r1 as it does the above assignment by default.

System Message: ERROR/3 (<stdin>, line 59)

Unknown directive type "index".

.. index:: EPYTHON

System Message: ERROR/3 (<stdin>, line 60)

Unknown directive type "index".

.. index:: PYTHON

Python environment

The eclasses commonly use the concept of Python environment. This means a state of environment enforcing a particular Python implementation. Whenever the ebuild code is run inside this environment, EPYTHON variable indicates which implementation is being used (by its executable name, e.g. python3.8).

Additionally, PYTHON provides the absolute path to the interpreter (however, using EPYTHON is preferable whenever possible). Wrappers for python, pythonN and some common tools are provided in PATH, and /usr/bin/python etc. also enforce the specific implementation via python-exec (for programs that hardcode full path).

The environment can be either established in local scope, or globally. The local scope generally applies to multi-impl packages, and is created either by calls to python_foreach_impl from python-r1, or inside sub-phase functions in distutils-r1. The global scope setup is done via calling python_setup, either directly or via default pkg_setup in python-any-r1 and python-single-r1.

</html>