kconfig: add script to manipulate .config files on the command line

[net-next-2.6.git] / scripts / config

diff --git a/scripts/config b/scripts/config
new file mode 100755 (executable)
index 0000000..68b9761
--- /dev/null
+++ b/scripts/config
@@ -0,0 +1,150 @@
+#!/bin/bash
+# Manipulate options in a .config file from the command line
+
+usage() {
+       cat >&2 <<EOL
+Manipulate options in a .config file from the command line.
+Usage:
+config options command ...
+commands:
+       --enable|-e option   Enable option
+       --disable|-d option  Disable option
+       --module|-m option      Turn option into a module
+       --state|-s option       Print state of option (n,y,m,undef)
+
+       --enable-after|-E beforeopt option
+                             Enable option directly after other option
+       --disable-after|-D beforeopt option
+                             Disable option directly after other option
+       --module-after|-M beforeopt option
+                             Turn option into module directly after other option
+
+       commands can be repeated multiple times
+
+options:
+       --file .config file to change (default .config)
+
+config doesn't check the validity of the .config file. This is done at next
+ make time.
+The options need to be already in the file before they can be changed,
+but sometimes you can cheat with the --*-after options.
+EOL
+       exit 1
+}
+
+checkarg() {
+       ARG="$1"
+       if [ "$ARG" = "" ] ; then
+               usage
+       fi
+       case "$ARG" in
+       CONFIG_*)
+               ARG="${ARG/CONFIG_/}"
+               ;;
+       esac
+       ARG="`echo $ARG | tr a-z A-Z`"
+}
+
+replace() {
+       sed -i -e "$@" $FN
+}
+
+if [ "$1" = "--file" ]; then
+       FN="$2"
+       if [ "$FN" = "" ] ; then
+               usage
+       fi
+       shift
+       shift
+else
+       FN=.config
+fi
+
+while [ "$1" != "" ] ; do
+       CMD="$1"
+       shift
+       case "$CMD" in
+       --enable|-e)
+               checkarg "$1"
+               replace "s/# CONFIG_$ARG is not set/CONFIG_$ARG=y/"
+               shift
+               ;;
+
+       --disable|-d)
+               checkarg "$1"
+               replace "s/CONFIG_$ARG=[my]/# CONFIG_$ARG is not set/"
+               shift
+               ;;
+
+       --module|-m)
+               checkarg "$1"
+               replace "s/CONFIG_$ARG=y/CONFIG_$ARG=m/" \
+                       -e "s/# CONFIG_$ARG is not set/CONFIG_$ARG=m/"
+               shift
+               ;;
+
+       --state|-s)
+               checkarg "$1"
+               if grep -q "# CONFIG_$ARG is not set" $FN ; then
+                       echo n
+               else
+                       V="$(grep "^CONFIG_$ARG=" $FN)"
+                       if [ $? != 0 ] ; then
+                               echo undef
+                       else
+                               V="${V/CONFIG_$ARG=/}"
+                               V="${V/\"/}"
+                               echo "$V"
+                       fi
+               fi
+               shift
+               ;;
+
+       --enable-after|-E)
+               checkarg "$1"
+               A=$ARG
+               checkarg "$2"
+               B=$ARG
+               replace "/CONFIG_$A=[my]/aCONFIG_$B=y" \
+                       -e "/# CONFIG_$ARG is not set/a/CONFIG_$ARG=y" \
+                       -e "s/# CONFIG_$ARG is not set/CONFIG_$ARG=y/"
+               shift
+               shift
+               ;;
+
+       --disable-after|-D)
+               checkarg "$1"
+               A=$ARG
+               checkarg "$2"
+               B=$ARG
+               replace "/CONFIG_$A=[my]/a# CONFIG_$B is not set" \
+               -e "/# CONFIG_$ARG is not set/a/# CONFIG_$ARG is not set" \
+               -e "s/CONFIG_$ARG=[my]/# CONFIG_$ARG is not set/"
+               shift
+               shift
+               ;;
+
+       --module-after|-M)
+               checkarg "$1"
+               A=$ARG
+               checkarg "$2"
+               B=$ARG
+               replace "/CONFIG_$A=[my]/aCONFIG_$B=m" \
+                       -e "/# CONFIG_$ARG is not set/a/CONFIG_$ARG=m" \
+                       -e "s/CONFIG_$ARG=y/CONFIG_$ARG=m/" \
+                       -e "s/# CONFIG_$ARG is not set/CONFIG_$ARG=m/"
+               shift
+               shift
+               ;;
+
+       # undocumented because it ignores --file (fixme)
+       --refresh)
+               yes "" | make oldconfig
+               ;;
+
+       *)
+               usage
+               ;;
+       esac
+done
+