Home | History | Annotate | Download | only in kconfig
      1 #!/bin/sh
      2 #  merge_config.sh - Takes a list of config fragment values, and merges
      3 #  them one by one. Provides warnings on overridden values, and specified
      4 #  values that did not make it to the resulting .config file (due to missed
      5 #  dependencies or config symbol removal).
      6 #
      7 #  Portions reused from kconf_check and generate_cfg:
      8 #  http://git.yoctoproject.org/cgit/cgit.cgi/yocto-kernel-tools/tree/tools/kconf_check
      9 #  http://git.yoctoproject.org/cgit/cgit.cgi/yocto-kernel-tools/tree/tools/generate_cfg
     10 #
     11 #  Copyright (c) 2009-2010 Wind River Systems, Inc.
     12 #  Copyright 2011 Linaro
     13 #
     14 #  This program is free software; you can redistribute it and/or modify
     15 #  it under the terms of the GNU General Public License version 2 as
     16 #  published by the Free Software Foundation.
     17 #
     18 #  This program is distributed in the hope that it will be useful,
     19 #  but WITHOUT ANY WARRANTY; without even the implied warranty of
     20 #  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
     21 #  See the GNU General Public License for more details.
     22 
     23 clean_up() {
     24 	rm -f $TMP_FILE
     25 	exit
     26 }
     27 trap clean_up HUP INT TERM
     28 
     29 usage() {
     30 	echo "Usage: $0 [OPTIONS] [CONFIG [...]]"
     31 	echo "  -h    display this help text"
     32 	echo "  -m    only merge the fragments, do not execute the make command"
     33 	echo "  -n    use allnoconfig instead of alldefconfig"
     34 	echo "  -r    list redundant entries when merging fragments"
     35 	echo "  -O    dir to put generated output files.  Consider setting \$KCONFIG_CONFIG instead."
     36 }
     37 
     38 RUNMAKE=true
     39 ALLTARGET=alldefconfig
     40 WARNREDUN=false
     41 OUTPUT=.
     42 
     43 while true; do
     44 	case $1 in
     45 	"-n")
     46 		ALLTARGET=allnoconfig
     47 		shift
     48 		continue
     49 		;;
     50 	"-m")
     51 		RUNMAKE=false
     52 		shift
     53 		continue
     54 		;;
     55 	"-h")
     56 		usage
     57 		exit
     58 		;;
     59 	"-r")
     60 		WARNREDUN=true
     61 		shift
     62 		continue
     63 		;;
     64 	"-O")
     65 		if [ -d $2 ];then
     66 			OUTPUT=$(echo $2 | sed 's/\/*$//')
     67 		else
     68 			echo "output directory $2 does not exist" 1>&2
     69 			exit 1
     70 		fi
     71 		shift 2
     72 		continue
     73 		;;
     74 	*)
     75 		break
     76 		;;
     77 	esac
     78 done
     79 
     80 if [ "$#" -lt 1 ] ; then
     81 	usage
     82 	exit
     83 fi
     84 
     85 if [ -z "$KCONFIG_CONFIG" ]; then
     86 	if [ "$OUTPUT" != . ]; then
     87 		KCONFIG_CONFIG=$(readlink -m -- "$OUTPUT/.config")
     88 	else
     89 		KCONFIG_CONFIG=.config
     90 	fi
     91 fi
     92 
     93 INITFILE=$1
     94 shift;
     95 
     96 if [ ! -r "$INITFILE" ]; then
     97 	echo "The base file '$INITFILE' does not exist.  Exit." >&2
     98 	exit 1
     99 fi
    100 
    101 MERGE_LIST=$*
    102 SED_CONFIG_EXP="s/^\(# \)\{0,1\}\(CONFIG_[a-zA-Z0-9_]*\)[= ].*/\2/p"
    103 TMP_FILE=$(mktemp ./.tmp.config.XXXXXXXXXX)
    104 
    105 echo "Using $INITFILE as base"
    106 cat $INITFILE > $TMP_FILE
    107 
    108 # Merge files, printing warnings on overridden values
    109 for MERGE_FILE in $MERGE_LIST ; do
    110 	echo "Merging $MERGE_FILE"
    111 	if [ ! -r "$MERGE_FILE" ]; then
    112 		echo "The merge file '$MERGE_FILE' does not exist.  Exit." >&2
    113 		exit 1
    114 	fi
    115 	CFG_LIST=$(sed -n "$SED_CONFIG_EXP" $MERGE_FILE)
    116 
    117 	for CFG in $CFG_LIST ; do
    118 		grep -q -w $CFG $TMP_FILE || continue
    119 		PREV_VAL=$(grep -w $CFG $TMP_FILE)
    120 		NEW_VAL=$(grep -w $CFG $MERGE_FILE)
    121 		if [ "x$PREV_VAL" != "x$NEW_VAL" ] ; then
    122 			echo Value of $CFG is redefined by fragment $MERGE_FILE:
    123 			echo Previous  value: $PREV_VAL
    124 			echo New value:       $NEW_VAL
    125 			echo
    126 		elif [ "$WARNREDUN" = "true" ]; then
    127 			echo Value of $CFG is redundant by fragment $MERGE_FILE:
    128 		fi
    129 		sed -i "/$CFG[ =]/d" $TMP_FILE
    130 	done
    131 	cat $MERGE_FILE >> $TMP_FILE
    132 done
    133 
    134 if [ "$RUNMAKE" = "false" ]; then
    135 	cp -T -- "$TMP_FILE" "$KCONFIG_CONFIG"
    136 	echo "#"
    137 	echo "# merged configuration written to $KCONFIG_CONFIG (needs make)"
    138 	echo "#"
    139 	clean_up
    140 	exit
    141 fi
    142 
    143 # If we have an output dir, setup the O= argument, otherwise leave
    144 # it blank, since O=. will create an unnecessary ./source softlink
    145 OUTPUT_ARG=""
    146 if [ "$OUTPUT" != "." ] ; then
    147 	OUTPUT_ARG="O=$OUTPUT"
    148 fi
    149 
    150 
    151 # Use the merged file as the starting point for:
    152 # alldefconfig: Fills in any missing symbols with Kconfig default
    153 # allnoconfig: Fills in any missing symbols with # CONFIG_* is not set
    154 make KCONFIG_ALLCONFIG=$TMP_FILE $OUTPUT_ARG $ALLTARGET
    155 
    156 
    157 # Check all specified config values took (might have missed-dependency issues)
    158 for CFG in $(sed -n "$SED_CONFIG_EXP" $TMP_FILE); do
    159 
    160 	REQUESTED_VAL=$(grep -w -e "$CFG" $TMP_FILE)
    161 	ACTUAL_VAL=$(grep -w -e "$CFG" "$KCONFIG_CONFIG")
    162 	if [ "x$REQUESTED_VAL" != "x$ACTUAL_VAL" ] ; then
    163 		echo "Value requested for $CFG not in final .config"
    164 		echo "Requested value:  $REQUESTED_VAL"
    165 		echo "Actual value:     $ACTUAL_VAL"
    166 		echo ""
    167 	fi
    168 done
    169 
    170 clean_up
    171