src/merge_config.sh

   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: $0 [OPTIONS] [CONFIG [...]]"
  31         echo "  -h    display this help text"
  32         echo "  -m    only merge the fragments, do not execute the make command"
  33         echo "  -n    use allnoconfig instead of alldefconfig"
  34         echo "  -r    list redundant entries when merging fragments"
  35         echo "  -O    dir to put generated output files.  Consider setting \$KCONFIG_CONFIG instead."
  36         echo "  -e    colon-separated list of br2-external trees to use (optional)"
  37         echo
  38         echo "Used prefix: '$CONFIG_PREFIX'. You can redefine it with \$CONFIG_
  39         environment variable."
  40 }
  41
  42 RUNMAKE=true
  43 ALLTARGET=alldefconfig
  44 WARNREDUN=false
  45 OUTPUT=.
  46 CONFIG_PREFIX=${CONFIG_-CONFIG_}
  47
  48 while true; do
  49         case $1 in
  50         "-n")
  51                 ALLTARGET=allnoconfig
  52                 shift
  53                 continue
  54                 ;;
  55         "-m")
  56                 RUNMAKE=false
  57                 shift
  58                 continue
  59                 ;;
  60         "-h")
  61                 usage
  62                 exit
  63                 ;;
  64         "-r")
  65                 WARNREDUN=true
  66                 shift
  67                 continue
  68                 ;;
  69         "-O")
  70                 if [ -d $2 ];then
  71                         OUTPUT=$(echo $2 | sed 's/\/*$//')
  72                 else
  73                         echo "output directory $2 does not exist" 1>&2
  74                         exit 1
  75                 fi
  76                 shift 2
  77                 continue
  78                 ;;
  79         "-e")
  80                 EXTERNAL_ARG="BR2_EXTERNAL=$2"
  81                 shift 2
  82                 continue
  83                 ;;
  84         *)
  85                 break
  86                 ;;
  87         esac
  88 done
  89
  90 if [ "$#" -lt 1 ] ; then
  91         usage
  92         exit
  93 fi
  94
  95 if [ -z "$KCONFIG_CONFIG" ]; then
  96         if [ "$OUTPUT" != . ]; then
  97                 KCONFIG_CONFIG=$(readlink -m -- "$OUTPUT/.config")
  98         else
  99                 KCONFIG_CONFIG=.config
 100         fi
 101 fi
 102
 103 INITFILE=$1
 104 shift;
 105
 106 if [ ! -r "$INITFILE" ]; then
 107         echo "The base file '$INITFILE' does not exist.  Exit." >&2
 108         exit 1
 109 fi
 110
 111 MERGE_LIST=$*
 112 SED_CONFIG_EXP1="s/^\(${CONFIG_PREFIX}[a-zA-Z0-9_]*\)=.*/\1/p"
 113 SED_CONFIG_EXP2="s/^# \(${CONFIG_PREFIX}[a-zA-Z0-9_]*\) is not set$/\1/p"
 114
 115 TMP_FILE=$(mktemp -t .tmp.config.XXXXXXXXXX)
 116
 117 echo "Using $INITFILE as base"
 118 cat $INITFILE > $TMP_FILE
 119
 120 # Merge files, printing warnings on overridden values
 121 for MERGE_FILE in $MERGE_LIST ; do
 122         echo "Merging $MERGE_FILE"
 123         if [ ! -r "$MERGE_FILE" ]; then
 124                 echo "The merge file '$MERGE_FILE' does not exist.  Exit." >&2
 125                 exit 1
 126         fi
 127         CFG_LIST=$(sed -n -e "$SED_CONFIG_EXP1" -e "$SED_CONFIG_EXP2" $MERGE_FILE)
 128
 129         for CFG in $CFG_LIST ; do
 130                 grep -q -w $CFG $TMP_FILE || continue
 131                 PREV_VAL=$(grep -w $CFG $TMP_FILE)
 132                 NEW_VAL=$(grep -w $CFG $MERGE_FILE)
 133                 if [ "x$PREV_VAL" != "x$NEW_VAL" ] ; then
 134                         echo Value of $CFG is redefined by fragment $MERGE_FILE:
 135                         echo Previous  value: $PREV_VAL
 136                         echo New value:       $NEW_VAL
 137                         echo
 138                 elif [ "$WARNREDUN" = "true" ]; then
 139                         echo Value of $CFG is redundant by fragment $MERGE_FILE:
 140                 fi
 141                 sed -i "/$CFG[ =]/d" $TMP_FILE
 142         done
 143         cat $MERGE_FILE >> $TMP_FILE
 144 done
 145
 146 if [ "$RUNMAKE" = "false" ]; then
 147         cp -T -- "$TMP_FILE" "$KCONFIG_CONFIG"
 148         echo "#"
 149         echo "# merged configuration written to $KCONFIG_CONFIG (needs make)"
 150         echo "#"
 151         clean_up
 152         exit
 153 fi
 154
 155 # If we have an output dir, setup the O= argument, otherwise leave
 156 # it blank, since O=. will create an unnecessary ./source softlink
 157 OUTPUT_ARG=""
 158 if [ "$OUTPUT" != "." ] ; then
 159         OUTPUT_ARG="O=$OUTPUT"
 160 fi
 161
 162
 163 # Use the merged file as the starting point for:
 164 # alldefconfig: Fills in any missing symbols with Kconfig default
 165 # allnoconfig: Fills in any missing symbols with # CONFIG_* is not set
 166 make KCONFIG_ALLCONFIG=$TMP_FILE $EXTERNAL_ARG $OUTPUT_ARG $ALLTARGET
 167
 168
 169 # Check all specified config values took (might have missed-dependency issues)
 170 for CFG in $(sed -n -e "$SED_CONFIG_EXP1" -e "$SED_CONFIG_EXP2" $TMP_FILE); do
 171
 172         REQUESTED_VAL=$(grep -w -e "$CFG" $TMP_FILE)
 173         ACTUAL_VAL=$(grep -w -e "$CFG" "$KCONFIG_CONFIG")
 174         if [ "x$REQUESTED_VAL" != "x$ACTUAL_VAL" ] ; then
 175                 echo "Value requested for $CFG not in final .config"
 176                 echo "Requested value:  $REQUESTED_VAL"
 177                 echo "Actual value:     $ACTUAL_VAL"
 178                 echo ""
 179         fi
 180 done
 181
 182 clean_up