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
  66         shift
  67 else
  68         FN=.config
  69 fi
  70
  71 if [ "$1" = "" ] ; then
  72         usage
  73 fi
  74
  75 while [ "$1" != "" ] ; do
  76         CMD="$1"
  77         shift
  78         case "$CMD" in
  79         --enable|-e)
  80                 checkarg "$1"
  81                 set_var "CONFIG_$ARG" "CONFIG_$ARG=y"
  82                 shift
  83                 ;;
  84
  85         --disable|-d)
  86                 checkarg "$1"
  87                 set_var "CONFIG_$ARG" "# CONFIG_$ARG is not set"
  88                 shift
  89                 ;;
  90
  91         --module|-m)
  92                 checkarg "$1"
  93                 set_var "CONFIG_$ARG" "CONFIG_$ARG=m"
  94                 shift
  95                 ;;
  96
  97         --state|-s)
  98                 checkarg "$1"
  99                 if grep -q "# CONFIG_$ARG is not set" $FN ; then
 100                         echo n
 101                 else
 102                         V="$(grep "^CONFIG_$ARG=" $FN)"
 103                         if [ $? != 0 ] ; then
 104                                 echo undef
 105                         else
 106                                 V="${V/CONFIG_$ARG=/}"
 107                                 V="${V/\"/}"
 108                                 echo "$V"
 109                         fi
 110                 fi
 111                 shift
 112                 ;;
 113
 114         --enable-after|-E)
 115                 checkarg "$1"
 116                 A=$ARG
 117                 checkarg "$2"
 118                 B=$ARG
 119                 set_var "CONFIG_$B" "CONFIG_$B=y" "CONFIG_$A"
 120                 shift
 121                 shift
 122                 ;;
 123
 124         --disable-after|-D)
 125                 checkarg "$1"
 126                 A=$ARG
 127                 checkarg "$2"
 128                 B=$ARG
 129                 set_var "CONFIG_$B" "# CONFIG_$B is not set" "CONFIG_$A"
 130                 shift
 131                 shift
 132                 ;;
 133
 134         --module-after|-M)
 135                 checkarg "$1"
 136                 A=$ARG
 137                 checkarg "$2"
 138                 B=$ARG
 139                 set_var "CONFIG_$B" "CONFIG_$B=m" "CONFIG_$A"
 140                 shift
 141                 shift
 142                 ;;
 143
 144         # undocumented because it ignores --file (fixme)
 145         --refresh)
 146                 yes "" | make oldconfig
 147                 ;;
 148
 149         *)
 150                 usage
 151                 ;;
 152         esac
 153 done
 154