devstack/tools/build_venv.sh

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#!/usr/bin/env bash
#
# **tools/build_venv.sh** - Build a Python Virtual Envirnment
#
# build_venv.sh venv-path [package [...]]
#
# Assumes:
# - a useful pip is installed
# - virtualenv will be installed by pip
# - installs basic common prereq packages that require compilation
# to allow quick copying of resulting venv as a baseline
VENV_DEST=${1:-.venv}
shift
MORE_PACKAGES="$@"
# If TOP_DIR is set we're being sourced rather than running stand-alone
# or in a sub-shell
if [[ -z "$TOP_DIR" ]]; then
set -o errexit
set -o nounset
# Keep track of the devstack directory
TOP_DIR=$(cd $(dirname "$0")/.. && pwd)
FILES=$TOP_DIR/files
# Import common functions
source $TOP_DIR/functions
GetDistro
source $TOP_DIR/stackrc
trap err_trap ERR
fi
# Exit on any errors so that errors don't compound
function err_trap {
local r=$?
set +o xtrace
rm -rf $TMP_VENV_PATH
exit $r
}
# Build new venv
virtualenv $VENV_DEST
# Install modern pip
$VENV_DEST/bin/pip install -U pip
for pkg in ${MORE_PACKAGES}; do
pip_install_venv $VENV_DEST $pkg
done