scripts/kconfig/merge_config.sh

   1 #!/bin/sh
   2 # SPDX-License-Identifier: GPL-2.0
   3 #
   4 #  merge_config.sh - Takes a list of config fragment values, and merges
   5 #  them one by one. Provides warnings on overridden values, and specified
   6 #  values that did not make it to the resulting .config file (due to missed
   7 #  dependencies or config symbol removal).
   8 #
   9 #  Portions reused from kconf_check and generate_cfg:
  10 #  http://git.yoctoproject.org/cgit/cgit.cgi/yocto-kernel-tools/tree/tools/kconf_check
  11 #  http://git.yoctoproject.org/cgit/cgit.cgi/yocto-kernel-tools/tree/tools/generate_cfg
  12 #
  13 #  Copyright (c) 2009-2010 Wind River Systems, Inc.
  14 #  Copyright 2011 Linaro
  15
  16 clean_up() {
  17         rm -f $TMP_FILE
  18         rm -f $MERGE_FILE
  19         exit
  20 }
  21 trap clean_up HUP INT TERM
  22
  23 usage() {
  24         echo "Usage: $0 [OPTIONS] [CONFIG [...]]"
  25         echo "  -h    display this help text"
  26         echo "  -m    only merge the fragments, do not execute the make command"
  27         echo "  -n    use allnoconfig instead of alldefconfig"
  28         echo "  -r    list redundant entries when merging fragments"
  29         echo "  -y    make builtin have precedence over modules"
  30         echo "  -O    dir to put generated output files.  Consider setting \$KCONFIG_CONFIG instead."
  31         echo
  32         echo "Used prefix: '$CONFIG_PREFIX'. You can redefine it with \$CONFIG_ environment variable."
  33 }
  34
  35 RUNMAKE=true
  36 ALLTARGET=alldefconfig
  37 WARNREDUN=false
  38 BUILTIN=false
  39 OUTPUT=.
  40 CONFIG_PREFIX=${CONFIG_-CONFIG_}
  41
  42 while true; do
  43         case $1 in
  44         "-n")
  45                 ALLTARGET=allnoconfig
  46                 shift
  47                 continue
  48                 ;;
  49         "-m")
  50                 RUNMAKE=false
  51                 shift
  52                 continue
  53                 ;;
  54         "-h")
  55                 usage
  56                 exit
  57                 ;;
  58         "-r")
  59                 WARNREDUN=true
  60                 shift
  61                 continue
  62                 ;;
  63         "-y")
  64                 BUILTIN=true
  65                 shift
  66                 continue
  67                 ;;
  68         "-O")
  69                 if [ -d $2 ];then
  70                         OUTPUT=$(echo $2 | sed 's/\/*$//')
  71                 else
  72                         echo "output directory $2 does not exist" 1>&2
  73                         exit 1
  74                 fi
  75                 shift 2
  76                 continue
  77                 ;;
  78         *)
  79                 break
  80                 ;;
  81         esac
  82 done
  83
  84 if [ "$#" -lt 1 ] ; then
  85         usage
  86         exit
  87 fi
  88
  89 if [ -z "$KCONFIG_CONFIG" ]; then
  90         if [ "$OUTPUT" != . ]; then
  91                 KCONFIG_CONFIG=$(readlink -m -- "$OUTPUT/.config")
  92         else
  93                 KCONFIG_CONFIG=.config
  94         fi
  95 fi
  96
  97 INITFILE=$1
  98 shift;
  99
 100 if [ ! -r "$INITFILE" ]; then
 101         echo "The base file '$INITFILE' does not exist.  Exit." >&2
 102         exit 1
 103 fi
 104
 105 MERGE_LIST=$*
 106 SED_CONFIG_EXP1="s/^\(${CONFIG_PREFIX}[a-zA-Z0-9_]*\)=.*/\1/p"
 107 SED_CONFIG_EXP2="s/^# \(${CONFIG_PREFIX}[a-zA-Z0-9_]*\) is not set$/\1/p"
 108
 109 TMP_FILE=$(mktemp ./.tmp.config.XXXXXXXXXX)
 110 MERGE_FILE=$(mktemp ./.merge_tmp.config.XXXXXXXXXX)
 111
 112 echo "Using $INITFILE as base"
 113 cat $INITFILE > $TMP_FILE
 114
 115 # Merge files, printing warnings on overridden values
 116 for ORIG_MERGE_FILE in $MERGE_LIST ; do
 117         echo "Merging $ORIG_MERGE_FILE"
 118         if [ ! -r "$ORIG_MERGE_FILE" ]; then
 119                 echo "The merge file '$ORIG_MERGE_FILE' does not exist.  Exit." >&2
 120                 exit 1
 121         fi
 122         cat $ORIG_MERGE_FILE > $MERGE_FILE
 123         CFG_LIST=$(sed -n -e "$SED_CONFIG_EXP1" -e "$SED_CONFIG_EXP2" $MERGE_FILE)
 124
 125         for CFG in $CFG_LIST ; do
 126                 grep -q -w $CFG $TMP_FILE || continue
 127                 PREV_VAL=$(grep -w $CFG $TMP_FILE)
 128                 NEW_VAL=$(grep -w $CFG $MERGE_FILE)
 129                 BUILTIN_FLAG=false
 130                 if [ "$BUILTIN" = "true" ] && [ "${NEW_VAL#CONFIG_*=}" = "m" ] && [ "${PREV_VAL#CONFIG_*=}" = "y" ]; then
 131                         echo Previous  value: $PREV_VAL
 132                         echo New value:       $NEW_VAL
 133                         echo -y passed, will not demote y to m
 134                         echo
 135                         BUILTIN_FLAG=true
 136                 elif [ "x$PREV_VAL" != "x$NEW_VAL" ] ; then
 137                         echo Value of $CFG is redefined by fragment $ORIG_MERGE_FILE:
 138                         echo Previous  value: $PREV_VAL
 139                         echo New value:       $NEW_VAL
 140                         echo
 141                 elif [ "$WARNREDUN" = "true" ]; then
 142                         echo Value of $CFG is redundant by fragment $ORIG_MERGE_FILE:
 143                 fi
 144                 if [ "$BUILTIN_FLAG" = "false" ]; then
 145                         sed -i "/$CFG[ =]/d" $TMP_FILE
 146                 else
 147                         sed -i "/$CFG[ =]/d" $MERGE_FILE
 148                 fi
 149         done
 150         cat $MERGE_FILE >> $TMP_FILE
 151 done
 152
 153 if [ "$RUNMAKE" = "false" ]; then
 154         cp -T -- "$TMP_FILE" "$KCONFIG_CONFIG"
 155         echo "#"
 156         echo "# merged configuration written to $KCONFIG_CONFIG (needs make)"
 157         echo "#"
 158         clean_up
 159         exit
 160 fi
 161
 162 # If we have an output dir, setup the O= argument, otherwise leave
 163 # it blank, since O=. will create an unnecessary ./source softlink
 164 OUTPUT_ARG=""
 165 if [ "$OUTPUT" != "." ] ; then
 166         OUTPUT_ARG="O=$OUTPUT"
 167 fi
 168
 169
 170 # Use the merged file as the starting point for:
 171 # alldefconfig: Fills in any missing symbols with Kconfig default
 172 # allnoconfig: Fills in any missing symbols with # CONFIG_* is not set
 173 make KCONFIG_ALLCONFIG=$TMP_FILE $OUTPUT_ARG $ALLTARGET
 174
 175
 176 # Check all specified config values took (might have missed-dependency issues)
 177 for CFG in $(sed -n -e "$SED_CONFIG_EXP1" -e "$SED_CONFIG_EXP2" $TMP_FILE); do
 178
 179         REQUESTED_VAL=$(grep -w -e "$CFG" $TMP_FILE)
 180         ACTUAL_VAL=$(grep -w -e "$CFG" "$KCONFIG_CONFIG")
 181         if [ "x$REQUESTED_VAL" != "x$ACTUAL_VAL" ] ; then
 182                 echo "Value requested for $CFG not in final .config"
 183                 echo "Requested value:  $REQUESTED_VAL"
 184                 echo "Actual value:     $ACTUAL_VAL"
 185                 echo ""
 186         fi
 187 done
 188
 189 clean_up