diff options
Diffstat (limited to 'scripts/kconfig/merge_config.sh')
| -rwxr-xr-x | scripts/kconfig/merge_config.sh | 204 |
1 files changed, 204 insertions, 0 deletions
diff --git a/scripts/kconfig/merge_config.sh b/scripts/kconfig/merge_config.sh new file mode 100755 index 000000000..e5b46980c --- /dev/null +++ b/scripts/kconfig/merge_config.sh @@ -0,0 +1,204 @@ +#!/bin/sh +# 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 + +set -e + +clean_up() { + rm -f $TMP_FILE + rm -f $MERGE_FILE +} + +usage() { + echo "Usage: $0 [OPTIONS] [CONFIG [...]]" + echo " -h display this help text" + echo " -m only merge the fragments, do not execute the make command" + echo " -n use allnoconfig instead of alldefconfig" + echo " -r list redundant entries when merging fragments" + echo " -y make builtin have precedence over modules" + echo " -O dir to put generated output files. Consider setting \$KCONFIG_CONFIG instead." + echo " -s strict mode. Fail if the fragment redefines any value." + echo + echo "Used prefix: '$CONFIG_PREFIX'. You can redefine it with \$CONFIG_ environment variable." +} + +RUNMAKE=true +ALLTARGET=alldefconfig +WARNREDUN=false +BUILTIN=false +OUTPUT=. +STRICT=false +CONFIG_PREFIX=${CONFIG_-CONFIG_} + +while true; do + case $1 in + "-n") + ALLTARGET=allnoconfig + shift + continue + ;; + "-m") + RUNMAKE=false + shift + continue + ;; + "-h") + usage + exit + ;; + "-r") + WARNREDUN=true + shift + continue + ;; + "-y") + BUILTIN=true + shift + continue + ;; + "-O") + if [ -d $2 ];then + OUTPUT=$(echo $2 | sed 's/\/*$//') + else + echo "output directory $2 does not exist" 1>&2 + exit 1 + fi + shift 2 + continue + ;; + "-s") + STRICT=true + shift + continue + ;; + *) + break + ;; + esac +done + +if [ "$#" -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/^\(${CONFIG_PREFIX}[a-zA-Z0-9_]*\)=.*/\1/p" +SED_CONFIG_EXP2="s/^# \(${CONFIG_PREFIX}[a-zA-Z0-9_]*\) is not set$/\1/p" + +TMP_FILE=$(mktemp ./.tmp.config.XXXXXXXXXX) +MERGE_FILE=$(mktemp ./.merge_tmp.config.XXXXXXXXXX) + +echo "Using $INITFILE as base" + +trap clean_up EXIT + +cat $INITFILE > $TMP_FILE + +# Merge files, printing warnings on overridden values +for ORIG_MERGE_FILE in $MERGE_LIST ; do + echo "Merging $ORIG_MERGE_FILE" + if [ ! -r "$ORIG_MERGE_FILE" ]; then + echo "The merge file '$ORIG_MERGE_FILE' does not exist. Exit." >&2 + exit 1 + fi + cat $ORIG_MERGE_FILE > $MERGE_FILE + CFG_LIST=$(sed -n -e "$SED_CONFIG_EXP1" -e "$SED_CONFIG_EXP2" $MERGE_FILE) + + for CFG in $CFG_LIST ; do + grep -q -w $CFG $TMP_FILE || continue + PREV_VAL=$(grep -w $CFG $TMP_FILE) + NEW_VAL=$(grep -w $CFG $MERGE_FILE) + BUILTIN_FLAG=false + if [ "$BUILTIN" = "true" ] && [ "${NEW_VAL#CONFIG_*=}" = "m" ] && [ "${PREV_VAL#CONFIG_*=}" = "y" ]; then + echo Previous value: $PREV_VAL + echo New value: $NEW_VAL + echo -y passed, will not demote y to m + echo + BUILTIN_FLAG=true + elif [ "x$PREV_VAL" != "x$NEW_VAL" ] ; then + echo Value of $CFG is redefined by fragment $ORIG_MERGE_FILE: + echo Previous value: $PREV_VAL + echo New value: $NEW_VAL + echo + if [ "$STRICT" = "true" ]; then + STRICT_MODE_VIOLATED=true + fi + elif [ "$WARNREDUN" = "true" ]; then + echo Value of $CFG is redundant by fragment $ORIG_MERGE_FILE: + fi + if [ "$BUILTIN_FLAG" = "false" ]; then + sed -i "/$CFG[ =]/d" $TMP_FILE + else + sed -i "/$CFG[ =]/d" $MERGE_FILE + fi + done + cat $MERGE_FILE >> $TMP_FILE +done + +if [ "$STRICT_MODE_VIOLATED" = "true" ]; then + echo "The fragment redefined a value and strict mode had been passed." + exit 1 +fi + +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 [ "x$REQUESTED_VAL" != "x$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 |