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https://github.com/enthought/sat-solver

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https://github.com/enthought/sat-solver

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README

          

Prototype for SAT-based dependency handling. This is a work in progress,
do not expect any API not to change at this point.

Installation
============

To install the python package, simple do as follows::

git clone --recursive https://github.com/enthought/sat-solver
cd sat-solver
pip install -e .

Example usage
=============

TODO

Usage from the CLI
==================

To try things out from the CLI, you need to write a scenario file (yaml
format), see simplesat/tests/simple_numpy.yaml for a simple example.

To print the rules::

python scripts/print_rules.py simplesat/tests/simple_numpy.yaml

To print the operations::

python scripts/solve.py simplesat/tests/simple_numpy.yaml

Comparing with php's composer
=============================

First, clone composer's somewhere on your machine::

git clone https://github.com/composer/composer

Then, use the `scripts/scenario_to_php.py` script to write a php file that will
print the composer's solution for a given scenario::

python scripts/scenario_to_php.py \
--composer-root \
simplesat/tests/simple_numpy.yaml \
scripts/print_operations.php.in

This will create a `scripts/print_operations.php` script you can simply execute w/
php::

php scripts/print_operations.php

Bibliography
============

- Niklas Eén, Niklas Sörensson: `An Extensible SAT-solver
`_. SAT 2003
- Lintao Zhang, Conor F. Madigan, Matthew H. Moskewicz, Sharad Malik:
`Efficient Conflict Driven Learning in a Boolean Satisfiability Solver
`_.
Proc. ICCAD 2001, pp. 279-285.
- Donald Knuth: `The art of computer programming
`_. Vol. 4,
Pre-fascicle 6A, Par. 7.2.2.2. (Satisfiability).

On the use of SAT solvers for managing packages:

- Fosdem 2008 presentation: `Using SAT for solving package dependencies
`_. More
details on the `SUSE wiki
`_.
- The `0install project `_.
- Chris Tucker, David Shuffelton, Ranjit Jhala, Sorin Lerner: `OPIUM: Optimal
Package Install/Uninstall Manager
`_. Proc. ICSE 2007,
pp. 178-188