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 The options need to be already in the file before they can be changed,
  30 but sometimes you can cheat with the --*-after options.
  31 EOL
  32         exit 1
  33 }
  34
  35 checkarg() {
  36         ARG="$1"
  37         if [ "$ARG" = "" ] ; then
  38                 usage
  39         fi
  40         case "$ARG" in
  41         CONFIG_*)
  42                 ARG="${ARG/CONFIG_/}"
  43                 ;;
  44         esac
  45         ARG="`echo $ARG | tr a-z A-Z`"
  46 }
  47
  48 replace() {
  49         sed -i -e "$@" $FN
  50 }
  51
  52 if [ "$1" = "--file" ]; then
  53         FN="$2"
  54         if [ "$FN" = "" ] ; then
  55                 usage
  56         fi
  57         shift
  58         shift
  59 else
  60         FN=.config
  61 fi
  62
  63 if [ "$1" = "" ] ; then
  64         usage
  65 fi
  66
  67 while [ "$1" != "" ] ; do
  68         CMD="$1"
  69         shift
  70         case "$CMD" in
  71         --enable|-e)
  72                 checkarg "$1"
  73                 replace "s/# CONFIG_$ARG is not set/CONFIG_$ARG=y/"
  74                 shift
  75                 ;;
  76
  77         --disable|-d)
  78                 checkarg "$1"
  79                 replace "s/CONFIG_$ARG=[my]/# CONFIG_$ARG is not set/"
  80                 shift
  81                 ;;
  82
  83         --module|-m)
  84                 checkarg "$1"
  85                 replace "s/CONFIG_$ARG=y/CONFIG_$ARG=m/" \
  86                         -e "s/# CONFIG_$ARG is not set/CONFIG_$ARG=m/"
  87                 shift
  88                 ;;
  89
  90         --state|-s)
  91                 checkarg "$1"
  92                 if grep -q "# CONFIG_$ARG is not set" $FN ; then
  93                         echo n
  94                 else
  95                         V="$(grep "^CONFIG_$ARG=" $FN)"
  96                         if [ $? != 0 ] ; then
  97                                 echo undef
  98                         else
  99                                 V="${V/CONFIG_$ARG=/}"
 100                                 V="${V/\"/}"
 101                                 echo "$V"
 102                         fi
 103                 fi
 104                 shift
 105                 ;;
 106
 107         --enable-after|-E)
 108                 checkarg "$1"
 109                 A=$ARG
 110                 checkarg "$2"
 111                 B=$ARG
 112                 replace "/CONFIG_$A=[my]/aCONFIG_$B=y" \
 113                         -e "/# CONFIG_$ARG is not set/a/CONFIG_$ARG=y" \
 114                         -e "s/# CONFIG_$ARG is not set/CONFIG_$ARG=y/"
 115                 shift
 116                 shift
 117                 ;;
 118
 119         --disable-after|-D)
 120                 checkarg "$1"
 121                 A=$ARG
 122                 checkarg "$2"
 123                 B=$ARG
 124                 replace "/CONFIG_$A=[my]/a# CONFIG_$B is not set" \
 125                 -e "/# CONFIG_$ARG is not set/a/# CONFIG_$ARG is not set" \
 126                 -e "s/CONFIG_$ARG=[my]/# CONFIG_$ARG is not set/"
 127                 shift
 128                 shift
 129                 ;;
 130
 131         --module-after|-M)
 132                 checkarg "$1"
 133                 A=$ARG
 134                 checkarg "$2"
 135                 B=$ARG
 136                 replace "/CONFIG_$A=[my]/aCONFIG_$B=m" \
 137                         -e "/# CONFIG_$ARG is not set/a/CONFIG_$ARG=m" \
 138                         -e "s/CONFIG_$ARG=y/CONFIG_$ARG=m/" \
 139                         -e "s/# CONFIG_$ARG is not set/CONFIG_$ARG=m/"
 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