support/kconfig/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"
  36 }
  37
  38 MAKE=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                 MAKE=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 INITFILE=$1
  81 shift;
  82
  83 MERGE_LIST=$*
  84 SED_CONFIG_EXP="s/^\(# \)\{0,1\}\(CONFIG_[a-zA-Z0-9_]*\)[= ].*/\2/p"
  85 TMP_FILE=$(mktemp -t .tmp.config.XXXXXXXXXX)
  86
  87 echo "Using $INITFILE as base"
  88 cat $INITFILE > $TMP_FILE
  89
  90 # Merge files, printing warnings on overrided values
  91 for MERGE_FILE in $MERGE_LIST ; do
  92         echo "Merging $MERGE_FILE"
  93         CFG_LIST=$(sed -n "$SED_CONFIG_EXP" $MERGE_FILE)
  94
  95         for CFG in $CFG_LIST ; do
  96                 grep -q -w $CFG $TMP_FILE
  97                 if [ $? -eq 0 ] ; then
  98                         PREV_VAL=$(grep -w $CFG $TMP_FILE)
  99                         NEW_VAL=$(grep -w $CFG $MERGE_FILE)
 100                         if [ "x$PREV_VAL" != "x$NEW_VAL" ] ; then
 101                         echo Value of $CFG is redefined by fragment $MERGE_FILE:
 102                         echo Previous  value: $PREV_VAL
 103                         echo New value:       $NEW_VAL
 104                         echo
 105                         elif [ "$WARNREDUN" = "true" ]; then
 106                         echo Value of $CFG is redundant by fragment $MERGE_FILE:
 107                         fi
 108                         sed -i "/$CFG[ =]/d" $TMP_FILE
 109                 fi
 110         done
 111         cat $MERGE_FILE >> $TMP_FILE
 112 done
 113
 114 if [ "$MAKE" = "false" ]; then
 115         cp $TMP_FILE $OUTPUT/.config
 116         echo "#"
 117         echo "# merged configuration written to $OUTPUT/.config (needs make)"
 118         echo "#"
 119         clean_up
 120         exit
 121 fi
 122
 123 # If we have an output dir, setup the O= argument, otherwise leave
 124 # it blank, since O=. will create an unnecessary ./source softlink
 125 OUTPUT_ARG=""
 126 if [ "$OUTPUT" != "." ] ; then
 127         OUTPUT_ARG="O=$OUTPUT"
 128 fi
 129
 130
 131 # Use the merged file as the starting point for:
 132 # alldefconfig: Fills in any missing symbols with Kconfig default
 133 # allnoconfig: Fills in any missing symbols with # CONFIG_* is not set
 134 make KCONFIG_ALLCONFIG=$TMP_FILE $OUTPUT_ARG $ALLTARGET
 135
 136
 137 # Check all specified config values took (might have missed-dependency issues)
 138 for CFG in $(sed -n "$SED_CONFIG_EXP" $TMP_FILE); do
 139
 140         REQUESTED_VAL=$(grep -w -e "$CFG" $TMP_FILE)
 141         ACTUAL_VAL=$(grep -w -e "$CFG" $OUTPUT/.config)
 142         if [ "x$REQUESTED_VAL" != "x$ACTUAL_VAL" ] ; then
 143                 echo "Value requested for $CFG not in final .config"
 144                 echo "Requested value:  $REQUESTED_VAL"
 145                 echo "Actual value:     $ACTUAL_VAL"
 146                 echo ""
 147         fi
 148 done
 149
 150 clean_up