1#!/bin/sh 2# SPDX-License-Identifier: GPL-2.0 3# 4# merge_config.sh - Takes a list of config fragment values, and merges 5# them one by one. Provides warnings on overridden values, and specified 6# values that did not make it to the resulting .config file (due to missed 7# dependencies or config symbol removal). 8# 9# Portions reused from kconf_check and generate_cfg: 10# http://git.yoctoproject.org/cgit/cgit.cgi/yocto-kernel-tools/tree/tools/kconf_check 11# http://git.yoctoproject.org/cgit/cgit.cgi/yocto-kernel-tools/tree/tools/generate_cfg 12# 13# Copyright (c) 2009-2010 Wind River Systems, Inc. 14# Copyright 2011 Linaro 15 16clean_up() { 17 rm -f $TMP_FILE 18 rm -f $MERGE_FILE 19 exit 20} 21trap clean_up HUP INT TERM 22 23usage() { 24 echo "Usage: $0 [OPTIONS] [CONFIG [...]]" 25 echo " -h display this help text" 26 echo " -m only merge the fragments, do not execute the make command" 27 echo " -n use allnoconfig instead of alldefconfig" 28 echo " -r list redundant entries when merging fragments" 29 echo " -y make builtin have precedence over modules" 30 echo " -O dir to put generated output files. Consider setting \$KCONFIG_CONFIG instead." 31 echo 32 echo "Used prefix: '$CONFIG_PREFIX'. You can redefine it with \$CONFIG_ environment variable." 33} 34 35RUNMAKE=true 36ALLTARGET=alldefconfig 37WARNREDUN=false 38BUILTIN=false 39OUTPUT=. 40CONFIG_PREFIX=${CONFIG_-CONFIG_} 41 42while true; do 43 case $1 in 44 "-n") 45 ALLTARGET=allnoconfig 46 shift 47 continue 48 ;; 49 "-m") 50 RUNMAKE=false 51 shift 52 continue 53 ;; 54 "-h") 55 usage 56 exit 57 ;; 58 "-r") 59 WARNREDUN=true 60 shift 61 continue 62 ;; 63 "-y") 64 BUILTIN=true 65 shift 66 continue 67 ;; 68 "-O") 69 if [ -d $2 ];then 70 OUTPUT=$(echo $2 | sed 's/\/*$//') 71 else 72 echo "output directory $2 does not exist" 1>&2 73 exit 1 74 fi 75 shift 2 76 continue 77 ;; 78 *) 79 break 80 ;; 81 esac 82done 83 84if [ "$#" -lt 1 ] ; then 85 usage 86 exit 87fi 88 89if [ -z "$KCONFIG_CONFIG" ]; then 90 if [ "$OUTPUT" != . ]; then 91 KCONFIG_CONFIG=$(readlink -m -- "$OUTPUT/.config") 92 else 93 KCONFIG_CONFIG=.config 94 fi 95fi 96 97INITFILE=$1 98shift; 99 100if [ ! -r "$INITFILE" ]; then 101 echo "The base file '$INITFILE' does not exist. Exit." >&2 102 exit 1 103fi 104 105MERGE_LIST=$* 106SED_CONFIG_EXP1="s/^\(${CONFIG_PREFIX}[a-zA-Z0-9_]*\)=.*/\1/p" 107SED_CONFIG_EXP2="s/^# \(${CONFIG_PREFIX}[a-zA-Z0-9_]*\) is not set$/\1/p" 108 109TMP_FILE=$(mktemp ./.tmp.config.XXXXXXXXXX) 110MERGE_FILE=$(mktemp ./.merge_tmp.config.XXXXXXXXXX) 111 112echo "Using $INITFILE as base" 113cat $INITFILE > $TMP_FILE 114 115# Merge files, printing warnings on overridden values 116for ORIG_MERGE_FILE in $MERGE_LIST ; do 117 echo "Merging $ORIG_MERGE_FILE" 118 if [ ! -r "$ORIG_MERGE_FILE" ]; then 119 echo "The merge file '$ORIG_MERGE_FILE' does not exist. Exit." >&2 120 exit 1 121 fi 122 cat $ORIG_MERGE_FILE > $MERGE_FILE 123 CFG_LIST=$(sed -n -e "$SED_CONFIG_EXP1" -e "$SED_CONFIG_EXP2" $MERGE_FILE) 124 125 for CFG in $CFG_LIST ; do 126 grep -q -w $CFG $TMP_FILE || continue 127 PREV_VAL=$(grep -w $CFG $TMP_FILE) 128 NEW_VAL=$(grep -w $CFG $MERGE_FILE) 129 BUILTIN_FLAG=false 130 if [ "$BUILTIN" = "true" ] && [ "${NEW_VAL#CONFIG_*=}" = "m" ] && [ "${PREV_VAL#CONFIG_*=}" = "y" ]; then 131 echo Previous value: $PREV_VAL 132 echo New value: $NEW_VAL 133 echo -y passed, will not demote y to m 134 echo 135 BUILTIN_FLAG=true 136 elif [ "x$PREV_VAL" != "x$NEW_VAL" ] ; then 137 echo Value of $CFG is redefined by fragment $ORIG_MERGE_FILE: 138 echo Previous value: $PREV_VAL 139 echo New value: $NEW_VAL 140 echo 141 elif [ "$WARNREDUN" = "true" ]; then 142 echo Value of $CFG is redundant by fragment $ORIG_MERGE_FILE: 143 fi 144 if [ "$BUILTIN_FLAG" = "false" ]; then 145 sed -i "/$CFG[ =]/d" $TMP_FILE 146 else 147 sed -i "/$CFG[ =]/d" $MERGE_FILE 148 fi 149 done 150 cat $MERGE_FILE >> $TMP_FILE 151done 152 153if [ "$RUNMAKE" = "false" ]; then 154 cp -T -- "$TMP_FILE" "$KCONFIG_CONFIG" 155 echo "#" 156 echo "# merged configuration written to $KCONFIG_CONFIG (needs make)" 157 echo "#" 158 clean_up 159 exit 160fi 161 162# If we have an output dir, setup the O= argument, otherwise leave 163# it blank, since O=. will create an unnecessary ./source softlink 164OUTPUT_ARG="" 165if [ "$OUTPUT" != "." ] ; then 166 OUTPUT_ARG="O=$OUTPUT" 167fi 168 169 170# Use the merged file as the starting point for: 171# alldefconfig: Fills in any missing symbols with Kconfig default 172# allnoconfig: Fills in any missing symbols with # CONFIG_* is not set 173make KCONFIG_ALLCONFIG=$TMP_FILE $OUTPUT_ARG $ALLTARGET 174 175 176# Check all specified config values took (might have missed-dependency issues) 177for CFG in $(sed -n -e "$SED_CONFIG_EXP1" -e "$SED_CONFIG_EXP2" $TMP_FILE); do 178 179 REQUESTED_VAL=$(grep -w -e "$CFG" $TMP_FILE) 180 ACTUAL_VAL=$(grep -w -e "$CFG" "$KCONFIG_CONFIG") 181 if [ "x$REQUESTED_VAL" != "x$ACTUAL_VAL" ] ; then 182 echo "Value requested for $CFG not in final .config" 183 echo "Requested value: $REQUESTED_VAL" 184 echo "Actual value: $ACTUAL_VAL" 185 echo "" 186 fi 187done 188 189clean_up 190