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#!/bin/bash
set -euo pipefail
PREFIX=/opt/oai-gnb
ENABLE_X2=${ENABLE_X2:-yes}
THREAD_PARALLEL_CONFIG=${THREAD_PARALLEL_CONFIG:-PARALLEL_SINGLE_THREAD}
# Based another env var, pick one template to use
if [[ -v USE_NSA_TDD_MONO ]]; then cp $PREFIX/etc/gnb.nsa.tdd.conf $PREFIX/etc/gnb.conf; fi
if [[ -v USE_SA_TDD_MONO ]]; then cp $PREFIX/etc/gnb.sa.tdd.conf $PREFIX/etc/gnb.conf; fi
# Sometimes, the templates are not enough. We mount a conf file on $PREFIX/etc. It can be a template itself.
if [[ -v USE_VOLUMED_CONF ]]; then cp $PREFIX/etc/mounted.conf $PREFIX/etc/gnb.conf; fi
# Only this template will be manipulated
CONFIG_FILES=`ls $PREFIX/etc/gnb.conf || true`
for c in ${CONFIG_FILES}; do
# Sometimes templates have no pattern to be replaced.
if ! grep -oP '@[a-zA-Z0-9_]+@' ${c}; then
echo "Configuration is already set"
break
fi
# grep variable names (format: ${VAR}) from template to be rendered
VARS=$(grep -oP '@[a-zA-Z0-9_]+@' ${c} | sort | uniq | xargs)
# create sed expressions for substituting each occurrence of ${VAR}
# with the value of the environment variable "VAR"
EXPRESSIONS=""
for v in ${VARS}; do
NEW_VAR=`echo $v | sed -e "s#@##g"`
if [[ "${!NEW_VAR}x" == "x" ]]; then
echo "Error: Environment variable '${NEW_VAR}' is not set." \
"Config file '$(basename $c)' requires all of $VARS."
exit 1
fi
EXPRESSIONS="${EXPRESSIONS};s|${v}|${!NEW_VAR}|g"
done
EXPRESSIONS="${EXPRESSIONS#';'}"
# render template and inline replace config file
sed -i "${EXPRESSIONS}" ${c}
done
# Load the USRP binaries
if [[ -v USE_B2XX ]]; then
$PREFIX/bin/uhd_images_downloader.py -t b2xx
elif [[ -v USE_X3XX ]]; then
$PREFIX/bin/uhd_images_downloader.py -t x3xx
elif [[ -v USE_N3XX ]]; then
$PREFIX/bin/uhd_images_downloader.py -t n3xx
fi
echo "=================================="
echo "== Starting gNB soft modem"
if [[ -v USE_ADDITIONAL_OPTIONS ]]; then
echo "Additional option(s): ${USE_ADDITIONAL_OPTIONS}"
new_args=()
while [[ $# -gt 0 ]]; do
new_args+=("$1")
shift
done
for word in ${USE_ADDITIONAL_OPTIONS}; do
new_args+=("$word")
done
echo "${new_args[@]}"
exec "${new_args[@]}"
else
echo "$@"
exec "$@"
fi