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: Andi Kleen <ak@linux.intel.com>
Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
This commit is contained in:
Andi Kleen 2009-01-03 03:21:41 +01:00 committed by Sam Ravnborg
parent 4f628248a5
commit 8e54701ea8

150
scripts/config Executable file
View File

@ -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