scripts/config

   1 #!/bin/bash
   2 # Manipulate options in a .config file from the command line
   3
   4 # If no prefix forced, use the default CONFIG_
   5 CONFIG_="${CONFIG_-CONFIG_}"
   6
   7 usage() {
   8         cat >&2 <<EOL
   9 Manipulate options in a .config file from the command line.
  10 Usage:
  11 config options command ...
  12 commands:
  13         --enable|-e option   Enable option
  14         --disable|-d option  Disable option
  15         --module|-m option   Turn option into a module
  16         --set-str option string
  17                              Set option to "string"
  18         --set-val option value
  19                              Set option to value
  20         --state|-s option    Print state of option (n,y,m,undef)
  21
  22         --enable-after|-E beforeopt option
  23                              Enable option directly after other option
  24         --disable-after|-D beforeopt option
  25                              Disable option directly after other option
  26         --module-after|-M beforeopt option
  27                              Turn option into module directly after other option
  28
  29         commands can be repeated multiple times
  30
  31 options:
  32         --file config-file   .config file to change (default .config)
  33         --keep-case|-k       Keep next symbols' case (dont' upper-case it)
  34
  35 config doesn't check the validity of the .config file. This is done at next
  36 make time.
  37
  38 By default, config will upper-case the given symbol. Use --keep-case to keep
  39 the case of all following symbols unchanged.
  40
  41 config uses 'CONFIG_' as the default symbol prefix. Set the environment
  42 variable CONFIG_ to the prefix to use. Eg.: CONFIG_="FOO_" config ...
  43 EOL
  44         exit 1
  45 }
  46
  47 checkarg() {
  48         ARG="$1"
  49         if [ "$ARG" = "" ] ; then
  50                 usage
  51         fi
  52         case "$ARG" in
  53         ${CONFIG_}*)
  54                 ARG="${ARG/${CONFIG_}/}"
  55                 ;;
  56         esac
  57         if [ "$MUNGE_CASE" = "yes" ] ; then
  58                 ARG="`echo $ARG | tr a-z A-Z`"
  59         fi
  60 }
  61
  62 set_var() {
  63         local name=$1 new=$2 before=$3
  64
  65         name_re="^($name=|# $name is not set)"
  66         before_re="^($before=|# $before is not set)"
  67         if test -n "$before" && grep -Eq "$before_re" "$FN"; then
  68                 sed -ri "/$before_re/a $new" "$FN"
  69         elif grep -Eq "$name_re" "$FN"; then
  70                 sed -ri "s:$name_re.*:$new:" "$FN"
  71         else
  72                 echo "$new" >>"$FN"
  73         fi
  74 }
  75
  76 if [ "$1" = "--file" ]; then
  77         FN="$2"
  78         if [ "$FN" = "" ] ; then
  79                 usage
  80         fi
  81         shift 2
  82 else
  83         FN=.config
  84 fi
  85
  86 if [ "$1" = "" ] ; then
  87         usage
  88 fi
  89
  90 MUNGE_CASE=yes
  91 while [ "$1" != "" ] ; do
  92         CMD="$1"
  93         shift
  94         case "$CMD" in
  95         --keep-case|-k)
  96                 MUNGE_CASE=no
  97                 shift
  98                 continue
  99                 ;;
 100         --refresh)
 101                 ;;
 102         --*-after)
 103                 checkarg "$1"
 104                 A=$ARG
 105                 checkarg "$2"
 106                 B=$ARG
 107                 shift 2
 108                 ;;
 109         -*)
 110                 checkarg "$1"
 111                 shift
 112                 ;;
 113         esac
 114         case "$CMD" in
 115         --enable|-e)
 116                 set_var "${CONFIG_}$ARG" "${CONFIG_}$ARG=y"
 117                 ;;
 118
 119         --disable|-d)
 120                 set_var "${CONFIG_}$ARG" "# ${CONFIG_}$ARG is not set"
 121                 ;;
 122
 123         --module|-m)
 124                 set_var "${CONFIG_}$ARG" "${CONFIG_}$ARG=m"
 125                 ;;
 126
 127         --set-str)
 128                 # sed swallows one level of escaping, so we need double-escaping
 129                 set_var "${CONFIG_}$ARG" "${CONFIG_}$ARG=\"${1//\"/\\\\\"}\""
 130                 shift
 131                 ;;
 132
 133         --set-val)
 134                 set_var "${CONFIG_}$ARG" "${CONFIG_}$ARG=$1"
 135                 shift
 136                 ;;
 137
 138         --state|-s)
 139                 if grep -q "# ${CONFIG_}$ARG is not set" $FN ; then
 140                         echo n
 141                 else
 142                         V="$(grep "^${CONFIG_}$ARG=" $FN)"
 143                         if [ $? != 0 ] ; then
 144                                 echo undef
 145                         else
 146                                 V="${V/#${CONFIG_}$ARG=/}"
 147                                 V="${V/#\"/}"
 148                                 V="${V/%\"/}"
 149                                 V="${V/\\\"/\"}"
 150                                 echo "${V}"
 151                         fi
 152                 fi
 153                 ;;
 154
 155         --enable-after|-E)
 156                 set_var "${CONFIG_}$B" "${CONFIG_}$B=y" "${CONFIG_}$A"
 157                 ;;
 158
 159         --disable-after|-D)
 160                 set_var "${CONFIG_}$B" "# ${CONFIG_}$B is not set" "${CONFIG_}$A"
 161                 ;;
 162
 163         --module-after|-M)
 164                 set_var "${CONFIG_}$B" "${CONFIG_}$B=m" "${CONFIG_}$A"
 165                 ;;
 166
 167         # undocumented because it ignores --file (fixme)
 168         --refresh)
 169                 yes "" | make oldconfig
 170                 ;;
 171
 172         *)
 173                 usage
 174                 ;;
 175         esac
 176 done
 177