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         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