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#!
/bin/bash
#
Manipulate options in a .config file from the command line
#
If no prefix forced, use the default CONFIG_
CONFIG_=
"
${CONFIG_-CONFIG_}
"
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
--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
--module-after|-M beforeopt option
Turn option into module 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)
config doesn't check the validity of the .config file. This is done at next
make time.
By default, config will upper-case the given symbol. Use --keep-case to keep
the case of all following symbols unchanged.
config uses 'CONFIG_' as the default symbol prefix. Set the environment
variable CONFIG_ to the prefix to use. Eg.: CONFIG_="FOO_" config ...
EOL
exit
1
}
checkarg
() {
ARG=
"
$1
"
if
[
"
$ARG
"
=
"
"
]
;
then
usage
fi
case
"
$ARG
"
in
${CONFIG_}
*
)
ARG=
"
${ARG
/
${CONFIG_}
/
}
"
;;
esac
if
[
"
$MUNGE_CASE
"
=
"
yes
"
]
;
then
ARG=
"
`
echo
$ARG
|
tr a-z A-Z
`
"
fi
}
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
}
undef_var
() {
local
name=
$1
sed -ri
"
/^(
$name
=|#
$name
is not set)/d
"
"
$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
shift
continue
;;
--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
;;
--undefine|-u)
undef_var
"
${CONFIG_}
$ARG
"
;;
--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
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