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 16set -e 17 18clean_up() { 19 rm -f $TMP_FILE 20 rm -f $MERGE_FILE 21} 22 23usage() { 24 echo "Usage: $0 [OPTIONS] [CONFIG [...]]" 25 echo " -h display this help text" 26 echo " -m only merge the fragments, do not execute the make command" 27 echo " -n use allnoconfig instead of alldefconfig" 28 echo " -r list redundant entries when merging fragments" 29 echo " -y make builtin have precedence over modules" 30 echo " -O dir to put generated output files. Consider setting \$KCONFIG_CONFIG instead." 31 echo " -s strict mode. Fail if the fragment redefines any value." 32 echo " -Q disable warning messages for overridden options." 33 echo 34 echo "Used prefix: '$CONFIG_PREFIX'. You can redefine it with \$CONFIG_ environment variable." 35} 36 37RUNMAKE=true 38ALLTARGET=alldefconfig 39WARNREDUN=false 40BUILTIN=false 41OUTPUT=. 42STRICT=false 43CONFIG_PREFIX=${CONFIG_-CONFIG_} 44WARNOVERRIDE=echo 45 46while true; do 47 case $1 in 48 "-n") 49 ALLTARGET=allnoconfig 50 shift 51 continue 52 ;; 53 "-m") 54 RUNMAKE=false 55 shift 56 continue 57 ;; 58 "-h") 59 usage 60 exit 61 ;; 62 "-r") 63 WARNREDUN=true 64 shift 65 continue 66 ;; 67 "-y") 68 BUILTIN=true 69 shift 70 continue 71 ;; 72 "-O") 73 if [ -d $2 ];then 74 OUTPUT=$(echo $2 | sed 's/\/*$//') 75 else 76 echo "output directory $2 does not exist" 1>&2 77 exit 1 78 fi 79 shift 2 80 continue 81 ;; 82 "-s") 83 STRICT=true 84 shift 85 continue 86 ;; 87 "-Q") 88 WARNOVERRIDE=true 89 shift 90 continue 91 ;; 92 *) 93 break 94 ;; 95 esac 96done 97 98if [ "$#" -lt 1 ] ; then 99 usage 100 exit 101fi 102 103if [ -z "$KCONFIG_CONFIG" ]; then 104 if [ "$OUTPUT" != . ]; then 105 KCONFIG_CONFIG=$(readlink -m -- "$OUTPUT/.config") 106 else 107 KCONFIG_CONFIG=.config 108 fi 109fi 110 111INITFILE=$1 112shift; 113 114if [ ! -r "$INITFILE" ]; then 115 echo "The base file '$INITFILE' does not exist. Exit." >&2 116 exit 1 117fi 118 119MERGE_LIST=$* 120SED_CONFIG_EXP1="s/^\(${CONFIG_PREFIX}[a-zA-Z0-9_]*\)=.*/\1/p" 121SED_CONFIG_EXP2="s/^# \(${CONFIG_PREFIX}[a-zA-Z0-9_]*\) is not set$/\1/p" 122 123TMP_FILE=$(mktemp ./.tmp.config.XXXXXXXXXX) 124MERGE_FILE=$(mktemp ./.merge_tmp.config.XXXXXXXXXX) 125 126echo "Using $INITFILE as base" 127 128trap clean_up EXIT 129 130cat $INITFILE > $TMP_FILE 131 132# Merge files, printing warnings on overridden values 133for ORIG_MERGE_FILE in $MERGE_LIST ; do 134 echo "Merging $ORIG_MERGE_FILE" 135 if [ ! -r "$ORIG_MERGE_FILE" ]; then 136 echo "The merge file '$ORIG_MERGE_FILE' does not exist. Exit." >&2 137 exit 1 138 fi 139 cat $ORIG_MERGE_FILE > $MERGE_FILE 140 CFG_LIST=$(sed -n -e "$SED_CONFIG_EXP1" -e "$SED_CONFIG_EXP2" $MERGE_FILE) 141 142 for CFG in $CFG_LIST ; do 143 grep -q -w $CFG $TMP_FILE || continue 144 PREV_VAL=$(grep -w $CFG $TMP_FILE) 145 NEW_VAL=$(grep -w $CFG $MERGE_FILE) 146 BUILTIN_FLAG=false 147 if [ "$BUILTIN" = "true" ] && [ "${NEW_VAL#CONFIG_*=}" = "m" ] && [ "${PREV_VAL#CONFIG_*=}" = "y" ]; then 148 ${WARNOVERRIDE} Previous value: $PREV_VAL 149 ${WARNOVERRIDE} New value: $NEW_VAL 150 ${WARNOVERRIDE} -y passed, will not demote y to m 151 ${WARNOVERRIDE} 152 BUILTIN_FLAG=true 153 elif [ "x$PREV_VAL" != "x$NEW_VAL" ] ; then 154 ${WARNOVERRIDE} Value of $CFG is redefined by fragment $ORIG_MERGE_FILE: 155 ${WARNOVERRIDE} Previous value: $PREV_VAL 156 ${WARNOVERRIDE} New value: $NEW_VAL 157 ${WARNOVERRIDE} 158 if [ "$STRICT" = "true" ]; then 159 STRICT_MODE_VIOLATED=true 160 fi 161 elif [ "$WARNREDUN" = "true" ]; then 162 ${WARNOVERRIDE} Value of $CFG is redundant by fragment $ORIG_MERGE_FILE: 163 fi 164 if [ "$BUILTIN_FLAG" = "false" ]; then 165 sed -i "/$CFG[ =]/d" $TMP_FILE 166 else 167 sed -i "/$CFG[ =]/d" $MERGE_FILE 168 fi 169 done 170 # In case the previous file lacks a new line at the end 171 echo >> $TMP_FILE 172 cat $MERGE_FILE >> $TMP_FILE 173done 174 175if [ "$STRICT_MODE_VIOLATED" = "true" ]; then 176 echo "The fragment redefined a value and strict mode had been passed." 177 exit 1 178fi 179 180if [ "$RUNMAKE" = "false" ]; then 181 cp -T -- "$TMP_FILE" "$KCONFIG_CONFIG" 182 echo "#" 183 echo "# merged configuration written to $KCONFIG_CONFIG (needs make)" 184 echo "#" 185 exit 186fi 187 188# If we have an output dir, setup the O= argument, otherwise leave 189# it blank, since O=. will create an unnecessary ./source softlink 190OUTPUT_ARG="" 191if [ "$OUTPUT" != "." ] ; then 192 OUTPUT_ARG="O=$OUTPUT" 193fi 194 195 196# Use the merged file as the starting point for: 197# alldefconfig: Fills in any missing symbols with Kconfig default 198# allnoconfig: Fills in any missing symbols with # CONFIG_* is not set 199make KCONFIG_ALLCONFIG=$TMP_FILE $OUTPUT_ARG $ALLTARGET 200 201 202# Check all specified config values took (might have missed-dependency issues) 203for CFG in $(sed -n -e "$SED_CONFIG_EXP1" -e "$SED_CONFIG_EXP2" $TMP_FILE); do 204 205 REQUESTED_VAL=$(grep -w -e "$CFG" $TMP_FILE) 206 ACTUAL_VAL=$(grep -w -e "$CFG" "$KCONFIG_CONFIG" || true) 207 if [ "x$REQUESTED_VAL" != "x$ACTUAL_VAL" ] ; then 208 echo "Value requested for $CFG not in final .config" 209 echo "Requested value: $REQUESTED_VAL" 210 echo "Actual value: $ACTUAL_VAL" 211 echo "" 212 fi 213done 214