Root/scripts/config

Source at commit cdde9cf73945d547acd3e96f9508c79e84ad0bf1 created 9 years 4 months ago.
By Maarten ter Huurne, MMC: JZ4740: Added support for CPU frequency changing
1#!/bin/bash
2# Manipulate options in a .config file from the command line
3
4# If no prefix forced, use the default CONFIG_
5CONFIG_="${CONFIG_-CONFIG_}"
6
7usage() {
8    cat >&2 <<EOL
9Manipulate options in a .config file from the command line.
10Usage:
11config options command ...
12commands:
13    --enable|-e option Enable option
14    --disable|-d option Disable option
15    --module|-m option Turn option into a module
16    --set-str option string
17                         Set option to "string"
18    --set-val option value
19                         Set option to value
20    --undefine|-u option Undefine option
21    --state|-s option Print state of option (n,y,m,undef)
22
23    --enable-after|-E beforeopt option
24                             Enable option directly after other option
25    --disable-after|-D beforeopt option
26                             Disable option directly after other option
27    --module-after|-M beforeopt option
28                             Turn option into module directly after other option
29
30    commands can be repeated multiple times
31
32options:
33    --file config-file .config file to change (default .config)
34    --keep-case|-k Keep next symbols' case (dont' upper-case it)
35
36config doesn't check the validity of the .config file. This is done at next
37make time.
38
39By default, config will upper-case the given symbol. Use --keep-case to keep
40the case of all following symbols unchanged.
41
42config uses 'CONFIG_' as the default symbol prefix. Set the environment
43variable CONFIG_ to the prefix to use. Eg.: CONFIG_="FOO_" config ...
44EOL
45    exit 1
46}
47
48checkarg() {
49    ARG="$1"
50    if [ "$ARG" = "" ] ; then
51        usage
52    fi
53    case "$ARG" in
54    ${CONFIG_}*)
55        ARG="${ARG/${CONFIG_}/}"
56        ;;
57    esac
58    if [ "$MUNGE_CASE" = "yes" ] ; then
59        ARG="`echo $ARG | tr a-z A-Z`"
60    fi
61}
62
63set_var() {
64    local name=$1 new=$2 before=$3
65
66    name_re="^($name=|# $name is not set)"
67    before_re="^($before=|# $before is not set)"
68    if test -n "$before" && grep -Eq "$before_re" "$FN"; then
69        sed -ri "/$before_re/a $new" "$FN"
70    elif grep -Eq "$name_re" "$FN"; then
71        sed -ri "s:$name_re.*:$new:" "$FN"
72    else
73        echo "$new" >>"$FN"
74    fi
75}
76
77undef_var() {
78    local name=$1
79
80    sed -ri "/^($name=|# $name is not set)/d" "$FN"
81}
82
83if [ "$1" = "--file" ]; then
84    FN="$2"
85    if [ "$FN" = "" ] ; then
86        usage
87    fi
88    shift 2
89else
90    FN=.config
91fi
92
93if [ "$1" = "" ] ; then
94    usage
95fi
96
97MUNGE_CASE=yes
98while [ "$1" != "" ] ; do
99    CMD="$1"
100    shift
101    case "$CMD" in
102    --keep-case|-k)
103        MUNGE_CASE=no
104        shift
105        continue
106        ;;
107    --refresh)
108        ;;
109    --*-after)
110        checkarg "$1"
111        A=$ARG
112        checkarg "$2"
113        B=$ARG
114        shift 2
115        ;;
116    -*)
117        checkarg "$1"
118        shift
119        ;;
120    esac
121    case "$CMD" in
122    --enable|-e)
123        set_var "${CONFIG_}$ARG" "${CONFIG_}$ARG=y"
124        ;;
125
126    --disable|-d)
127        set_var "${CONFIG_}$ARG" "# ${CONFIG_}$ARG is not set"
128        ;;
129
130    --module|-m)
131        set_var "${CONFIG_}$ARG" "${CONFIG_}$ARG=m"
132        ;;
133
134    --set-str)
135        # sed swallows one level of escaping, so we need double-escaping
136        set_var "${CONFIG_}$ARG" "${CONFIG_}$ARG=\"${1//\"/\\\\\"}\""
137        shift
138        ;;
139
140    --set-val)
141        set_var "${CONFIG_}$ARG" "${CONFIG_}$ARG=$1"
142        shift
143        ;;
144    --undefine|-u)
145        undef_var "${CONFIG_}$ARG"
146        ;;
147
148    --state|-s)
149        if grep -q "# ${CONFIG_}$ARG is not set" $FN ; then
150            echo n
151        else
152            V="$(grep "^${CONFIG_}$ARG=" $FN)"
153            if [ $? != 0 ] ; then
154                echo undef
155            else
156                V="${V/#${CONFIG_}$ARG=/}"
157                V="${V/#\"/}"
158                V="${V/%\"/}"
159                V="${V//\\\"/\"}"
160                echo "${V}"
161            fi
162        fi
163        ;;
164
165    --enable-after|-E)
166        set_var "${CONFIG_}$B" "${CONFIG_}$B=y" "${CONFIG_}$A"
167        ;;
168
169    --disable-after|-D)
170        set_var "${CONFIG_}$B" "# ${CONFIG_}$B is not set" "${CONFIG_}$A"
171        ;;
172
173    --module-after|-M)
174        set_var "${CONFIG_}$B" "${CONFIG_}$B=m" "${CONFIG_}$A"
175        ;;
176
177    # undocumented because it ignores --file (fixme)
178    --refresh)
179        yes "" | make oldconfig
180        ;;
181
182    *)
183        usage
184        ;;
185    esac
186done
187
188

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