kumquat-buildroot/utils/config
Marcus Folkesson f2c5c7a263 utils/config: new script to manipulate .config files on the command line
Default prefix is set to `BR2_` but may be overidden by setting
BR2_PREFIX.

Example usage:

Enable `BR2_PACKAGE_GNUPG`:
./utils/config --package --enable GNUPG

Check state of config option `BR2_PACKAGE_GNUPG`:
./utils/config --package --state GNUPG
y

Enable `BR2_PACKAGE_GNUPG`:
./utils/config --package --disable GNUPG

Set `BR2_TARGET_GENERIC_ISSUE` to "Welcome":
./utils/config --set-str  TARGET_GENERIC_ISSUE "Welcome"

Copied from the Linux kernel (4.13-rc6) source code and adapted to
Buildroot.
Thanks to Andi Kleen who is the original author of this script.

Signed-off-by: Marcus Folkesson <marcus.folkesson@gmail.com>
[Arnout: merge the two tr invications]
Signed-off-by: Arnout Vandecappelle (Essensium/Mind) <arnout@mind.be>
2017-09-27 22:45:35 +02:00

207 lines
4.0 KiB
Bash
Executable File

#!/bin/bash
# Manipulate options in a .config file from the command line
myname=${0##*/}
# If no prefix forced, use the default BR2_
BR2_PREFIX="${BR2_PREFIX-BR2_}"
usage() {
cat >&2 <<EOL
Manipulate options in a .config file from the command line.
Usage:
$myname options command ...
commands:
--enable|-e option Enable option
--disable|-d option Disable option
--set-str option string
Set option to "string"
--set-val option value
Set option to value
--undefine|-u option Undefine option
--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
commands can be repeated multiple times
options:
--file config-file .config file to change (default .config)
--keep-case|-k Keep next symbols' case (dont' upper-case it)
--package|-p Operate on package (set prefix to BR2_PACKAGE_)
$myname doesn't check the validity of the .config file. This is done at next
make time.
By default, $myname will upper-case the given symbol. Use --keep-case to keep
the case of all following symbols unchanged.
$myname uses 'BR2_' as the default symbol prefix. Set the environment
variable BR2_PREFIX to the prefix to use. Eg.: BR2_PREFIX="FOO_" $myname ...
EOL
exit 1
}
checkarg() {
ARG="$1"
if [ "$ARG" = "" ] ; then
usage
fi
if [ "$MUNGE_CASE" = "yes" ] ; then
ARG="`echo $ARG | tr a-z- A-Z_`"
fi
case "$ARG" in
${BR2_PREFIX}*)
ARG="${ARG/${BR2_PREFIX}/}"
;;
esac
}
txt_append() {
local anchor="$1"
local insert="$2"
local infile="$3"
local tmpfile="$infile.swp"
# sed append cmd: 'a\' + newline + text + newline
cmd="$(printf "a\\%b$insert" "\n")"
sed -i -e "/$anchor/$cmd" "$infile"
}
txt_subst() {
local before="$1"
local after="$2"
local infile="$3"
local tmpfile="$infile.swp"
sed -i -e "s:$before:$after:" "$infile"
}
txt_delete() {
local text="$1"
local infile="$2"
local tmpfile="$infile.swp"
sed -i -e "/$text/d" "$infile"
}
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
txt_append "^$before=" "$new" "$FN"
txt_append "^# $before is not set" "$new" "$FN"
elif grep -Eq "$name_re" "$FN"; then
txt_subst "^$name=.*" "$new" "$FN"
txt_subst "^# $name is not set" "$new" "$FN"
else
echo "$new" >>"$FN"
fi
}
undef_var() {
local name=$1
txt_delete "^$name=" "$FN"
txt_delete "^# $name is not set" "$FN"
}
if [ "$1" = "--file" ]; then
FN="$2"
if [ "$FN" = "" ] ; then
usage
fi
shift 2
else
FN=.config
fi
if [ "$1" = "" ] ; then
usage
fi
MUNGE_CASE=yes
while [ "$1" != "" ] ; do
CMD="$1"
shift
case "$CMD" in
--keep-case|-k)
MUNGE_CASE=no
continue
;;
--package|-p)
BR2_PREFIX="BR2_PACKAGE_"
continue
;;
--*-after|-E|-D|-M)
checkarg "$1"
A=$ARG
checkarg "$2"
B=$ARG
shift 2
;;
-*)
checkarg "$1"
shift
;;
esac
case "$CMD" in
--enable|-e)
set_var "${BR2_PREFIX}$ARG" "${BR2_PREFIX}$ARG=y"
;;
--disable|-d)
set_var "${BR2_PREFIX}$ARG" "# ${BR2_PREFIX}$ARG is not set"
;;
--set-str)
# sed swallows one level of escaping, so we need double-escaping
set_var "${BR2_PREFIX}$ARG" "${BR2_PREFIX}$ARG=\"${1//\"/\\\\\"}\""
shift
;;
--set-val)
set_var "${BR2_PREFIX}$ARG" "${BR2_PREFIX}$ARG=$1"
shift
;;
--undefine|-u)
undef_var "${BR2_PREFIX}$ARG"
;;
--state|-s)
if grep -q "# ${BR2_PREFIX}$ARG is not set" $FN ; then
echo n
else
V="$(grep "^${BR2_PREFIX}$ARG=" $FN)"
if [ $? != 0 ] ; then
echo undef
else
V="${V/#${BR2_PREFIX}$ARG=/}"
V="${V/#\"/}"
V="${V/%\"/}"
V="${V//\\\"/\"}"
echo "${V}"
fi
fi
;;
--enable-after|-E)
set_var "${BR2_PREFIX}$B" "${BR2_PREFIX}$B=y" "${BR2_PREFIX}$A"
;;
--disable-after|-D)
set_var "${BR2_PREFIX}$B" "# ${BR2_PREFIX}$B is not set" "${BR2_PREFIX}$A"
;;
*)
usage
;;
esac
done