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         --set-str option string
  14                              Set option to "string"
  15         --set-val option value
  16                              Set option to value
  17         --state|-s option    Print state of option (n,y,m,undef)
  18
  19         --enable-after|-E beforeopt option
  20                              Enable option directly after other option
  21         --disable-after|-D beforeopt option
  22                              Disable option directly after other option
  23         --module-after|-M beforeopt option
  24                              Turn option into module directly after other option
  25
  26         commands can be repeated multiple times
  27
  28 options:
  29         --file .config file to change (default .config)
  30
  31 config doesn't check the validity of the .config file. This is done at next
  32  make time.
  33 EOL
  34         exit 1
  35 }
  36
  37 checkarg() {
  38         ARG="$1"
  39         if [ "$ARG" = "" ] ; then
  40                 usage
  41         fi
  42         case "$ARG" in
  43         CONFIG_*)
  44                 ARG="${ARG/CONFIG_/}"
  45                 ;;
  46         esac
  47         ARG="`echo $ARG | tr a-z A-Z`"
  48 }
  49
  50 set_var() {
  51         local name=$1 new=$2 before=$3
  52
  53         name_re="^($name=|# $name is not set)"
  54         before_re="^($before=|# $before is not set)"
  55         if test -n "$before" && grep -Eq "$before_re" "$FN"; then
  56                 sed -ri "/$before_re/a $new" "$FN"
  57         elif grep -Eq "$name_re" "$FN"; then
  58                 sed -ri "s:$name_re.*:$new:" "$FN"
  59         else
  60                 echo "$new" >>"$FN"
  61         fi
  62 }
  63
  64 if [ "$1" = "--file" ]; then
  65         FN="$2"
  66         if [ "$FN" = "" ] ; then
  67                 usage
  68         fi
  69         shift 2
  70 else
  71         FN=.config
  72 fi
  73
  74 if [ "$1" = "" ] ; then
  75         usage
  76 fi
  77
  78 while [ "$1" != "" ] ; do
  79         CMD="$1"
  80         shift
  81         case "$CMD" in
  82         --refresh)
  83                 ;;
  84         --*-after)
  85                 checkarg "$1"
  86                 A=$ARG
  87                 checkarg "$2"
  88                 B=$ARG
  89                 shift 2
  90                 ;;
  91         -*)
  92                 checkarg "$1"
  93                 shift
  94                 ;;
  95         esac
  96         case "$CMD" in
  97         --enable|-e)
  98                 set_var "CONFIG_$ARG" "CONFIG_$ARG=y"
  99                 ;;
 100
 101         --disable|-d)
 102                 set_var "CONFIG_$ARG" "# CONFIG_$ARG is not set"
 103                 ;;
 104
 105         --module|-m)
 106                 set_var "CONFIG_$ARG" "CONFIG_$ARG=m"
 107                 ;;
 108
 109         --set-str)
 110                 # sed swallows one level of escaping, so we need double-escaping
 111                 set_var "CONFIG_$ARG" "CONFIG_$ARG=\"${1//\"/\\\\\"}\""
 112                 shift
 113                 ;;
 114
 115         --set-val)
 116                 set_var "CONFIG_$ARG" "CONFIG_$ARG=$1"
 117                 shift
 118                 ;;
 119
 120         --state|-s)
 121                 if grep -q "# CONFIG_$ARG is not set" $FN ; then
 122                         echo n
 123                 else
 124                         V="$(grep "^CONFIG_$ARG=" $FN)"
 125                         if [ $? != 0 ] ; then
 126                                 echo undef
 127                         else
 128                                 V="${V/#CONFIG_$ARG=/}"
 129                                 V="${V/#\"/}"
 130                                 V="${V/%\"/}"
 131                                 V="${V/\\\"/\"}"
 132                                 echo "${V}"
 133                         fi
 134                 fi
 135                 ;;
 136
 137         --enable-after|-E)
 138                 set_var "CONFIG_$B" "CONFIG_$B=y" "CONFIG_$A"
 139                 ;;
 140
 141         --disable-after|-D)
 142                 set_var "CONFIG_$B" "# CONFIG_$B is not set" "CONFIG_$A"
 143                 ;;
 144
 145         --module-after|-M)
 146                 set_var "CONFIG_$B" "CONFIG_$B=m" "CONFIG_$A"
 147                 ;;
 148
 149         # undocumented because it ignores --file (fixme)
 150         --refresh)
 151                 yes "" | make oldconfig
 152                 ;;
 153
 154         *)
 155                 usage
 156                 ;;
 157         esac
 158 done
 159