pythenv.sh

#!/bin/sh

# Copyright 2021 MIT Probabilistic Computing Project
# Apache License, Version 2.0, refer to LICENSE.txt

set -Ceu

: ${PYTHON:=python}
root=`cd -- "$(dirname -- "$0")" && pwd`
platform=$("${PYTHON}" -c 'import distutils.util as u; print(u.get_platform())')
version=$("${PYTHON}" -c 'import sys; print(sys.version[0:3])')

# The lib directory varies depending on
#
# (a) whether there are extension modules (here, no); and
# (b) whether some Debian maintainer decided to patch the local Python
# to behave as though there were.
#
# But there's no obvious way to just ask distutils what the name will
# be.  There's no harm in naming a pathname that doesn't exist, other
# than a handful of microseconds of runtime, so we'll add both.
libdir="${root}/build/lib"
plat_libdir="${libdir}.${platform}-${version}"
export PYTHONPATH="${libdir}:${plat_libdir}${PYTHONPATH:+:${PYTHONPATH}}"

bindir="${root}/build/scripts-${version}"
export PATH="${bindir}${PATH:+:${PATH}}"

exec "$@"