build.sh

#!/bin/bash

# Copyright (c) 2020, NVIDIA CORPORATION.

# clx build script

# This script is used to build the component(s) in this repo from
# source, and can be called with various options to customize the
# build as needed (see the help output for details)

# Abort script on first error
set -e

NUMARGS=$#
ARGS=$*

# NOTE: ensure all dir changes are relative to the location of this
# script, and that this script resides in the repo dir!
REPODIR=$(cd $(dirname $0); pwd)

VALIDARGS="clean libclx clx -v -g -n -h --help"
HELP="$0 [<target> ...] [<flag> ...]
 where <target> is:
   clean      - remove all existing build artifacts and configuration (start over)
   libclx - build the clx C++ code
   clx    - build the clx Python package
 and <flag> is:
   -h         - print this text

 default action (no args) is to build and install 'clx' target
"
CLX_BUILD_DIR=${REPODIR}/python/build
BUILD_DIRS="${CLX_BUILD_DIR}"

# Set defaults for vars that may not have been defined externally
#  FIXME: if PREFIX is not set, check CONDA_PREFIX, but there is no fallback
#  from there!
INSTALL_PREFIX=${PREFIX:=${CONDA_PREFIX}}

function hasArg {
    (( ${NUMARGS} != 0 )) && (echo " ${ARGS} " | grep -q " $1 ")
}

if hasArg -h || hasArg --help; then
    echo "${HELP}"
    exit 0
fi

# Check for valid usage
if (( ${NUMARGS} != 0 )); then
    for a in ${ARGS}; do
	if ! (echo " ${VALIDARGS} " | grep -q " ${a} "); then
	    echo "Invalid option: ${a}"
	    exit 1
	fi
    done
fi

# If clean given, run it prior to any other steps
if hasArg clean; then
    # If the dirs to clean are mounted dirs in a container, the
    # contents should be removed but the mounted dirs will remain.
    # The find removes all contents but leaves the dirs, the rmdir
    # attempts to remove the dirs but can fail safely.
    for bd in ${BUILD_DIRS}; do
	if [ -d ${bd} ]; then
	    find ${bd} -mindepth 1 -delete
	    rmdir ${bd} || true
	fi
    done
fi

################################################################################

# Build and install the clx Python package
if (( ${NUMARGS} == 0 )) || hasArg clx; then

    cd ${REPODIR}/python
    python setup.py install
fi