Commit 8e54701e authored by Andi Kleen's avatar Andi Kleen Committed by Sam Ravnborg
Browse files

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



I often change single options in .config files. Instead of using
an editor or one of the frontends it's convenient to do this from
the command line. It's also useful to do from automated build scripts
when building different variants from a base config file.

I extracted most of the CONFIG manipulation code from one of my
build scripts into a new shell script scripts/config

The script is not integrated with the normal Kconfig machinery
and doesn't do any checking against Kconfig files, but just manipulates
that text format. This is always done at make time anyways.

I believe this script would be a useful standard addition for scripts/*

Sample usage:

./scripts/config --disable smp
Disable SMP in .config file

./scripts/config --file otherdir/.config --module e1000e
Enable E1000E as module in otherdir/.config

./scripts/config --state smp
y
Check state of config option CONFIG_SMP

After merging into git please make scripts/config executable

Signed-off-by: default avatarAndi Kleen <ak@linux.intel.com>
Signed-off-by: default avatarSam Ravnborg <sam@ravnborg.org>
parent 4f628248

scripts/config

0 → 100755
+150 −0
Original line number Diff line number Diff line 
#!/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

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