git.oblomov.eu Git - linux-2.6/blob - scripts/config

   1 #!/bin/bash
   2 # Manipulate options in a .config file from the command line
   3
   4 usage() {
   5         cat >&2 <<EOL
   6 Manipulate options in a .config file from the command line.
   7 Usage:
   8 config options command ...
   9 commands:
  10         --enable|-e option   Enable option
  11         --disable|-d option  Disable option
  12         --module|-m option      Turn option into a module
  13         --state|-s option       Print state of option (n,y,m,undef)
  14
  15         --enable-after|-E beforeopt option
  16                              Enable option directly after other option
  17         --disable-after|-D beforeopt option
  18                              Disable option directly after other option
  19         --module-after|-M beforeopt option
  20                              Turn option into module directly after other option
  21
  22         commands can be repeated multiple times
  23
  24 options:
  25         --file .config file to change (default .config)
  26
  27 config doesn't check the validity of the .config file. This is done at next
  28  make time.
  29 EOL
  30         exit 1
  31 }
  32
  33 checkarg() {
  34         ARG="$1"
  35         if [ "$ARG" = "" ] ; then
  36                 usage
  37         fi
  38         case "$ARG" in
  39         CONFIG_*)
  40                 ARG="${ARG/CONFIG_/}"
  41                 ;;
  42         esac
  43         ARG="`echo $ARG | tr a-z A-Z`"
  44 }
  45
  46 set_var() {
  47         local name=$1 new=$2 before=$3
  48
  49         name_re="^($name=|# $name is not set)"
  50         before_re="^($before=|# $before is not set)"
  51         if test -n "$before" && grep -Eq "$before_re" "$FN"; then
  52                 sed -ri "/$before_re/a $new" "$FN"
  53         elif grep -Eq "$name_re" "$FN"; then
  54                 sed -ri "s:$name_re.*:$new:" "$FN"
  55         else
  56                 echo "$new" >>"$FN"
  57         fi
  58 }
  59
  60 if [ "$1" = "--file" ]; then
  61         FN="$2"
  62         if [ "$FN" = "" ] ; then
  63                 usage
  64         fi
  65         shift 2
  66 else
  67         FN=.config
  68 fi
  69
  70 if [ "$1" = "" ] ; then
  71         usage
  72 fi
  73
  74 while [ "$1" != "" ] ; do
  75         CMD="$1"
  76         shift
  77         case "$CMD" in
  78         --refresh)
  79                 ;;
  80         --*-after)
  81                 checkarg "$1"
  82                 A=$ARG
  83                 checkarg "$2"
  84                 B=$ARG
  85                 shift 2
  86                 ;;
  87         --*)
  88                 checkarg "$1"
  89                 shift
  90                 ;;
  91         esac
  92         case "$CMD" in
  93         --enable|-e)
  94                 set_var "CONFIG_$ARG" "CONFIG_$ARG=y"
  95                 ;;
  96
  97         --disable|-d)
  98                 set_var "CONFIG_$ARG" "# CONFIG_$ARG is not set"
  99                 ;;
 100
 101         --module|-m)
 102                 set_var "CONFIG_$ARG" "CONFIG_$ARG=m"
 103                 ;;
 104
 105         --state|-s)
 106                 if grep -q "# CONFIG_$ARG is not set" $FN ; then
 107                         echo n
 108                 else
 109                         V="$(grep "^CONFIG_$ARG=" $FN)"
 110                         if [ $? != 0 ] ; then
 111                                 echo undef
 112                         else
 113                                 V="${V/CONFIG_$ARG=/}"
 114                                 V="${V/\"/}"
 115                                 echo "$V"
 116                         fi
 117                 fi
 118                 ;;
 119
 120         --enable-after|-E)
 121                 set_var "CONFIG_$B" "CONFIG_$B=y" "CONFIG_$A"
 122                 ;;
 123
 124         --disable-after|-D)
 125                 set_var "CONFIG_$B" "# CONFIG_$B is not set" "CONFIG_$A"
 126                 ;;
 127
 128         --module-after|-M)
 129                 set_var "CONFIG_$B" "CONFIG_$B=m" "CONFIG_$A"
 130                 ;;
 131
 132         # undocumented because it ignores --file (fixme)
 133         --refresh)
 134                 yes "" | make oldconfig
 135                 ;;
 136
 137         *)
 138                 usage
 139                 ;;
 140         esac
 141 done
 142