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