#!/bin/bash # SPDX-License-Identifier: GPL-2.0 # # merge_config.sh - Takes a list of config fragment values, and merges # them one by one. Provides warnings on overridden values, and specified # values that did not make it to the resulting .config file (due to missed # dependencies or config symbol removal). # # Portions reused from kconf_check and generate_cfg: # http://git.yoctoproject.org/cgit/cgit.cgi/yocto-kernel-tools/tree/tools/kconf_check # http://git.yoctoproject.org/cgit/cgit.cgi/yocto-kernel-tools/tree/tools/generate_cfg # # Copyright (c) 2009-2010 Wind River Systems, Inc. # Copyright 2011 Linaro # # Based on buildroot(2022.08.x)/support/kconfig/merge_config.sh # Copyright (c) 2022 Jeffy Chen # # This program is free software; you can redistribute it and/or modify # it under the terms of the GNU General Public License version 2 as # published by the Free Software Foundation. # # This program is distributed in the hope that it will be useful, # but WITHOUT ANY WARRANTY; without even the implied warranty of # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. # See the GNU General Public License for more details. set -e clean_up() { rm -f $TMP_FILE rm -f $TMP_MERGE_FILE } usage() { echo "Usage: $0 [OPTIONS] [CONFIG [...]]" echo " -h display this help text" echo " -m only merge the fragments, do not execute the make command" echo " -n use allnoconfig instead of alldefconfig" echo " -r list redundant entries when merging fragments" echo " -O dir to put generated output files. Consider setting \$KCONFIG_CONFIG instead." } RUNMAKE=true ALLTARGET=alldefconfig WARNREDUN=false OUTPUT=. while true; do case $1 in "-n") ALLTARGET=allnoconfig shift continue ;; "-m") RUNMAKE=false shift continue ;; "-h") usage exit ;; "-r") WARNREDUN=true shift continue ;; "-O") if [ -d $2 ];then OUTPUT=$(echo $2 | sed 's/\/*$//') else echo "output directory $2 does not exist" 1>&2 exit 1 fi shift 2 continue ;; *) break ;; esac done if [ "$#" -lt 1 ] ; then usage exit fi if [ -z "$KCONFIG_CONFIG" ]; then if [ "$OUTPUT" != . ]; then KCONFIG_CONFIG=$(readlink -m -- "$OUTPUT/.config") else KCONFIG_CONFIG=.config fi fi INITFILE=$1 shift; if [ ! -r "$INITFILE" ]; then echo "The base file '$INITFILE' does not exist. Exit." >&2 exit 1 fi MERGE_LIST=$* SED_CONFIG_EXP1="s/^\([a-zA-Z0-9_]*\)+\{0,1\}=.*/\1/p" SED_CONFIG_EXP2="s/^# \([a-zA-Z0-9_]*\) is not set$/\1/p" SED_CONFIG_EXP3="s/^# \([a-zA-Z0-9_]*\) is reset to default$/\1/p" SED_CLEAR_EXP1="s/^\([a-zA-Z0-9_]*\)+=/\1=/" # Append SED_CLEAR_EXP2="/^# \([a-zA-Z0-9_]*\) is reset to default$/d" # Reset TMP_FILE=$(mktemp ./.tmp.config.XXXXXXXXXX) TMP_MERGE_FILE=$(mktemp ./.merge_tmp.config.XXXXXXXXXX) echo "Using $INITFILE as base" trap clean_up EXIT cat $INITFILE | sed -e "$SED_CLEAR_EXP1" -e "$SED_CLEAR_EXP2" >> $TMP_FILE # Merge files, printing warnings on overridden values for MERGE_FILE in $MERGE_LIST ; do echo "Merging $MERGE_FILE" if [ ! -r "$MERGE_FILE" ]; then echo "The merge file '$MERGE_FILE' does not exist. Exit." >&2 exit 1 fi CFG_LIST=$(sed -n -e "$SED_CONFIG_EXP1" -e "$SED_CONFIG_EXP2" \ -e "$SED_CONFIG_EXP3" $MERGE_FILE) cat $MERGE_FILE > $TMP_MERGE_FILE for CFG in $CFG_LIST ; do grep -q -w $CFG $TMP_FILE || continue PREV_VAL=$(grep -w $CFG $TMP_FILE) ORIG_NEW_VAL=$(grep -w $CFG $TMP_MERGE_FILE) if [ "$ORIG_NEW_VAL" = "# $CFG is reset to default" ]; then # Reset NEW_VAL= elif [ "${ORIG_NEW_VAL%=*}" = "$CFG+" ]; then # Append if echo "$PREV_VAL" | grep -q "^#"; then # Replace NEW_VAL=${ORIG_NEW_VAL/+=/=} else ORIG_NEW_STR=$(echo "$ORIG_NEW_VAL" | \ sed "s/^.*=\"\(.*\)\"/\1/") PREV_STR=$(echo "$PREV_VAL" | \ sed "s/^.*=\"\(.*\)\"/\1/") NEW_STR= for s in $ORIG_NEW_STR; do echo "$PREV_STR" | xargs -n 1 | \ grep "^$s$" >/dev/null || \ NEW_STR="$NEW_STR $s" done if [ -z "$NEW_STR" ]; then # Skip NEW_VAL="$PREV_VAL" else # Append string value NEW_VAL="${PREV_VAL%\"} ${NEW_STR# }\"" fi # Update fragment sed -i "s#\<$CFG\>.*#$NEW_VAL#" $TMP_MERGE_FILE fi else # Normal replace NEW_VAL=$ORIG_NEW_VAL fi if [ "$PREV_VAL" != "$NEW_VAL" ] ; then echo "Value of $CFG is redefined by $MERGE_FILE:" echo -e "Previous value:\t$PREV_VAL" if [ "$NEW_VAL" != "$ORIG_NEW_VAL" ]; then echo -e "Modify value:\t$ORIG_NEW_VAL" fi echo -e "New value:\t$NEW_VAL" echo elif [ "$WARNREDUN" = "true" ]; then echo "Value of $CFG is redundant by $MERGE_FILE:" fi sed -i "/\<$CFG[ =]/d" $TMP_FILE done cat $TMP_MERGE_FILE | sed -e "$SED_CLEAR_EXP1" \ -e "$SED_CLEAR_EXP2" >> $TMP_FILE done if [ "$RUNMAKE" = "false" ]; then cp -T -- "$TMP_FILE" "$KCONFIG_CONFIG" echo "#" echo "# merged configuration written to $KCONFIG_CONFIG (needs make)" echo "#" exit fi # If we have an output dir, setup the O= argument, otherwise leave # it blank, since O=. will create an unnecessary ./source softlink OUTPUT_ARG="" if [ "$OUTPUT" != "." ] ; then OUTPUT_ARG="O=$OUTPUT" fi # Use the merged file as the starting point for: # alldefconfig: Fills in any missing symbols with Kconfig default # allnoconfig: Fills in any missing symbols with # CONFIG_* is not set make KCONFIG_ALLCONFIG=$TMP_FILE $OUTPUT_ARG $ALLTARGET # Check all specified config values took (might have missed-dependency issues) for CFG in $(sed -n -e "$SED_CONFIG_EXP1" -e "$SED_CONFIG_EXP2" $TMP_FILE); do REQUESTED_VAL=$(grep -w -e "$CFG" $TMP_FILE) ACTUAL_VAL=$(grep -w -e "$CFG" "$KCONFIG_CONFIG" || true) if [ "$REQUESTED_VAL" != "$ACTUAL_VAL" ] ; then echo "Value requested for $CFG not in final .config" echo "Requested value: $REQUESTED_VAL" echo "Actual value: $ACTUAL_VAL" echo "" fi done