Sage: Open Source Mathematics Software: Configuration module for the SageMath library
Project description
Description
This distribution package provides:
a single Python module, sage_conf, providing configuration information to the SageMath library at the time of its installation and at its runtime
a console script sage-config, for querying the variables of sage_conf from the shell
a sourcable shell script sage-env-config, providing additional configuration information in the form of environment variables
The sage_conf distribution package is polymorphic: It has several implementations.
sage_conf sdist on PyPI
This implementation of the sage_conf distribution package comes from https://github.com/sagemath/sage/issues/29039, which added the directory pkgs/sage-conf_pypi.
To install, use pip install -v sage_conf. Using -v ensures that diagnostic messages are displayed.
On installation (or building a wheel), it invokes sage_bootstrap to establish a build tree (SAGE_ROOT) and installation tree (SAGE_LOCAL) for the SageMath distribution. By default, it uses a subdirectory of $HOME/.sage that is specific to the version of the distribution and the version of Python in use. If several virtual environments over the same version of Python install sage_conf, they will share these trees.
After installation of sage_conf, a wheelhouse containing wheels of various libraries is available; type ls $(sage-config SAGE_SPKG_WHEELS) to list them and pip install $(sage-config SAGE_SPKG_WHEELS)/*.whl to install them. After this, you can install the Sage library, for example, using pip install sagemath-standard.
sage_conf wheels
Prebuilt binary wheels of the sage_conf distribution package are available at https://github.com/sagemath/sage-wheels/releases/
This implementation of sage_conf comes from https://github.com/sagemath/sage/issues/31396, which adds the directory pkgs/sage-conf_relocatable/.
On building a wheel, it invokes sage_bootstrap to establish a build and installation tree (SAGE_ROOT, SAGE_LOCAL) in a subdirectory of the directory /var/tmp/, whose name is specific to the version of the distribution and the version of Python in use.
The wheel distributes a copy of the prebuilt SAGE_ROOT and SAGE_LOCAL. Importing sage_conf (or using the installed sage-config script), makes sure that a symlink from the /var/tmp location to the actual persistent installation location is created. As the relocated libraries and programs contain the hardcoded path SAGE_LOCAL in various ways (including as rpaths), this symlink is necessary for the prebuilt libraries and programs to work.
/var/tmp is a sticky directory on all Linux distributions following the Filesystem Hierarchy Standard, as well as on macOS and on Cygwin. On multi-user systems, only one user can use a given version of the distribution; other installation schemes are recommended for systems with multiple Sage users.
sage_conf in the SageMath distribution
The original version of the distribution package sage_conf is used internally in the SageMath distribution. It is provided in the directory pkgs/sage-conf. This version of the package is generated by the Sage distribution’s configure script.
sage_conf in downstream distributions
Downstream packagers and advanced developers and users may want to provide their own implementation of the distribution package to support the intended deployment of the SageMath library.
License
GNU General Public License (GPL) v3 or later
Upstream Contact
This package is included in the source code of the Sage distribution, in pkgs/sage-conf*.
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