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 }
  35
  36 MAKE=true
  37 ALLTARGET=alldefconfig
  38
  39 while true; do
  40         case $1 in
  41         "-n")
  42                 ALLTARGET=allnoconfig
  43                 shift
  44                 continue
  45                 ;;
  46         "-m")
  47                 MAKE=false
  48                 shift
  49                 continue
  50                 ;;
  51         "-h")
  52                 usage
  53                 exit
  54                 ;;
  55         *)
  56                 break
  57                 ;;
  58         esac
  59 done
  60
  61
  62
  63 MERGE_LIST=$*
  64 SED_CONFIG_EXP="s/^\(# \)\{0,1\}\(CONFIG_[a-zA-Z0-9_]*\)[= ].*/\2/p"
  65 TMP_FILE=$(mktemp ./.tmp.config.XXXXXXXXXX)
  66
  67 # Merge files, printing warnings on overrided values
  68 for MERGE_FILE in $MERGE_LIST ; do
  69         echo "Merging $MERGE_FILE"
  70         CFG_LIST=$(sed -n "$SED_CONFIG_EXP" $MERGE_FILE)
  71
  72         for CFG in $CFG_LIST ; do
  73                 grep -q -w $CFG $TMP_FILE
  74                 if [ $? -eq 0 ] ; then
  75                         PREV_VAL=$(grep -w $CFG $TMP_FILE)
  76                         NEW_VAL=$(grep -w $CFG $MERGE_FILE)
  77                         if [ "x$PREV_VAL" != "x$NEW_VAL" ] ; then
  78                         echo Value of $CFG is redefined by fragment $MERGE_FILE:
  79                         echo Previous  value: $PREV_VAL
  80                         echo New value:       $NEW_VAL
  81                         echo
  82                         fi
  83                         sed -i "/$CFG[ =]/d" $TMP_FILE
  84                 fi
  85         done
  86         cat $MERGE_FILE >> $TMP_FILE
  87 done
  88
  89 if [ "$MAKE" = "false" ]; then
  90         cp $TMP_FILE .config
  91         echo "#"
  92         echo "# merged configuration written to .config (needs make)"
  93         echo "#"
  94         clean_up
  95         exit
  96 fi
  97
  98 # Use the merged file as the starting point for:
  99 # alldefconfig: Fills in any missing symbols with Kconfig default
 100 # allnoconfig: Fills in any missing symbols with # CONFIG_* is not set
 101 make KCONFIG_ALLCONFIG=$TMP_FILE $ALLTARGET
 102
 103
 104 # Check all specified config values took (might have missed-dependency issues)
 105 for CFG in $(sed -n "$SED_CONFIG_EXP" $TMP_FILE); do
 106
 107         REQUESTED_VAL=$(grep -w -e "$CFG" $TMP_FILE)
 108         ACTUAL_VAL=$(grep -w -e "$CFG" .config)
 109         if [ "x$REQUESTED_VAL" != "x$ACTUAL_VAL" ] ; then
 110                 echo "Value requested for $CFG not in final .config"
 111                 echo "Requested value:  $REQUESTED_VAL"
 112                 echo "Actual value:     $ACTUAL_VAL"
 113                 echo ""
 114         fi
 115 done
 116
 117 clean_up