environment

#!/bin/bash

# Exports environment variables needed by parts of this project.
#   PYTHONPATH
#   PATH

if [ "${BASH_SOURCE-}" = "$0" ]; then
    echo -e "This script should be sourced, not run:\nsource $0" >&2
    exit 1
fi

# Using ccache speeds up verilator simulation when not much has changed.
if which ccache >/dev/null; then
    export OBJCACHE="ccache"
    export CC="ccache gcc"
fi

CFU_ROOT=$(dirname $(realpath ${BASH_SOURCE[0]}))
# We deliberately clear anything that may have already been in PYTHONPATH to
# prevent accidentally pulling in anything outside this project.
PYTHONPATH="${CFU_ROOT}/python:${CFU_ROOT}/soc/board_specific_workflows"
for i in "${CFU_ROOT}/third_party/python/"*; do
    # Avoid adding files such as README.md to our path
    # - ValentyUsb is special-cased: it has a src/ directory
    #    that is *not* for Python
    if [ -d "$i/src" ] && [[ "$i" != *"valentyusb"* ]]; then
        PYTHONPATH="${PYTHONPATH}:${i}/src"
    elif [ -d "$i" ]; then
        PYTHONPATH="${PYTHONPATH}:${i}"
    fi
done
export PYTHONPATH

pathadd() {
    if [ -d "$1" ] && [[ ":$PATH:" != *":$1:"* ]]; then
        export PATH="${1}${PATH:+":$PATH"}"
    fi
}
pathadd "${CFU_ROOT}/scripts"