linux-yocto/scripts/config

#!/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 --set-str option string Set option to "string" --set-val option value Set option to value --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. 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" }

set_var() { local name=$1 new=$2 before=$3

name_re="^($name=|# $name is not set)"
before_re="^($before=|# $before is not set)"
if test -n "$before" && grep -Eq "$before_re" "$FN"; then
	sed -ri "/$before_re/a $new" "$FN"
elif grep -Eq "$name_re" "$FN"; then
	sed -ri "s:$name_re.*:$new:" "$FN"
else
	echo "$new" >>"$FN"
fi

}

if [ "$1" = "--file" ]; then FN="$2" if [ "$FN" = "" ] ; then usage fi shift 2 else FN=.config fi

if [ "$1" = "" ] ; then usage fi

while [ "$1" != "" ] ; do CMD="$1" shift case "$CMD" in --refresh) ;; ---after) checkarg "$1" A=$ARG checkarg "$2" B=$ARG shift 2 ;; -) checkarg "$1" shift ;; esac case "$CMD" in --enable|-e) set_var "CONFIG_$ARG" "CONFIG_$ARG=y" ;;

--disable|-d)
	set_var "CONFIG_$ARG" "# CONFIG_$ARG is not set"
	;;

--module|-m)
	set_var "CONFIG_$ARG" "CONFIG_$ARG=m"
	;;

--set-str)
	# sed swallows one level of escaping, so we need double-escaping
	set_var "CONFIG_$ARG" "CONFIG_$ARG=\"${1//\"/\\\\\"}\""
	shift
	;;

--set-val)
	set_var "CONFIG_$ARG" "CONFIG_$ARG=$1"
	shift
	;;

--state|-s)
	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/#\"/}"
			V="${V/%\"/}"
			V="${V//\\\"/\"}"
			echo "${V}"
		fi
	fi
	;;

--enable-after|-E)
	set_var "CONFIG_$B" "CONFIG_$B=y" "CONFIG_$A"
	;;

--disable-after|-D)
	set_var "CONFIG_$B" "# CONFIG_$B is not set" "CONFIG_$A"
	;;

--module-after|-M)
	set_var "CONFIG_$B" "CONFIG_$B=m" "CONFIG_$A"
	;;

# undocumented because it ignores --file (fixme)
--refresh)
	yes "" | make oldconfig
	;;

*)
	usage
	;;
esac

done