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