scripts/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 }
  36
  37 MAKE=true
  38 ALLTARGET=alldefconfig
  39 WARNREDUN=false
  40
  41 while true; do
  42         case $1 in
  43         "-n")
  44                 ALLTARGET=allnoconfig
  45                 shift
  46                 continue
  47                 ;;
  48         "-m")
  49                 MAKE=false
  50                 shift
  51                 continue
  52                 ;;
  53         "-h")
  54                 usage
  55                 exit
  56                 ;;
  57         "-r")
  58                 WARNREDUN=true
  59                 shift
  60                 continue
  61                 ;;
  62         *)
  63                 break
  64                 ;;
  65         esac
  66 done
  67
  68 INITFILE=$1
  69 shift;
  70
  71 MERGE_LIST=$*
  72 SED_CONFIG_EXP="s/^\(# \)\{0,1\}\(CONFIG_[a-zA-Z0-9_]*\)[= ].*/\2/p"
  73 TMP_FILE=$(mktemp ./.tmp.config.XXXXXXXXXX)
  74
  75 echo "Using $INITFILE as base"
  76 cat $INITFILE > $TMP_FILE
  77
  78 # Merge files, printing warnings on overrided values
  79 for MERGE_FILE in $MERGE_LIST ; do
  80         echo "Merging $MERGE_FILE"
  81         CFG_LIST=$(sed -n "$SED_CONFIG_EXP" $MERGE_FILE)
  82
  83         for CFG in $CFG_LIST ; do
  84                 grep -q -w $CFG $TMP_FILE
  85                 if [ $? -eq 0 ] ; then
  86                         PREV_VAL=$(grep -w $CFG $TMP_FILE)
  87                         NEW_VAL=$(grep -w $CFG $MERGE_FILE)
  88                         if [ "x$PREV_VAL" != "x$NEW_VAL" ] ; then
  89                         echo Value of $CFG is redefined by fragment $MERGE_FILE:
  90                         echo Previous  value: $PREV_VAL
  91                         echo New value:       $NEW_VAL
  92                         echo
  93                         elif [ "$WARNREDUN" = "true" ]; then
  94                         echo Value of $CFG is redundant by fragment $MERGE_FILE:
  95                         fi
  96                         sed -i "/$CFG[ =]/d" $TMP_FILE
  97                 fi
  98         done
  99         cat $MERGE_FILE >> $TMP_FILE
 100 done
 101
 102 if [ "$MAKE" = "false" ]; then
 103         cp $TMP_FILE .config
 104         echo "#"
 105         echo "# merged configuration written to .config (needs make)"
 106         echo "#"
 107         clean_up
 108         exit
 109 fi
 110
 111 # Use the merged file as the starting point for:
 112 # alldefconfig: Fills in any missing symbols with Kconfig default
 113 # allnoconfig: Fills in any missing symbols with # CONFIG_* is not set
 114 make KCONFIG_ALLCONFIG=$TMP_FILE $ALLTARGET
 115
 116
 117 # Check all specified config values took (might have missed-dependency issues)
 118 for CFG in $(sed -n "$SED_CONFIG_EXP" $TMP_FILE); do
 119
 120         REQUESTED_VAL=$(grep -w -e "$CFG" $TMP_FILE)
 121         ACTUAL_VAL=$(grep -w -e "$CFG" .config)
 122         if [ "x$REQUESTED_VAL" != "x$ACTUAL_VAL" ] ; then
 123                 echo "Value requested for $CFG not in final .config"
 124                 echo "Requested value:  $REQUESTED_VAL"
 125                 echo "Actual value:     $ACTUAL_VAL"
 126                 echo ""
 127         fi
 128 done
 129
 130 clean_up