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1 | #!/bin/bash | |
2 | # Manipulate options in a .config file from the command line | |
3 | ||
4 | myname=${0##*/} | |
5 | ||
6 | # If no prefix forced, use the default CONFIG_ | |
7 | CONFIG_="${CONFIG_-CONFIG_}" | |
8 | ||
9 | usage() { | |
10 | cat >&2 <<EOL | |
11 | Manipulate options in a .config file from the command line. | |
12 | Usage: | |
13 | $myname options command ... | |
14 | commands: | |
15 | --enable|-e option Enable option | |
16 | --disable|-d option Disable option | |
17 | --module|-m option Turn option into a module | |
18 | --set-str option string | |
19 | Set option to "string" | |
20 | --set-val option value | |
21 | Set option to value | |
22 | --undefine|-u option Undefine option | |
23 | --state|-s option Print state of option (n,y,m,undef) | |
24 | ||
25 | --enable-after|-E beforeopt option | |
26 | Enable option directly after other option | |
27 | --disable-after|-D beforeopt option | |
28 | Disable option directly after other option | |
29 | --module-after|-M beforeopt option | |
30 | Turn option into module directly after other option | |
31 | ||
32 | commands can be repeated multiple times | |
33 | ||
34 | options: | |
35 | --file config-file .config file to change (default .config) | |
36 | --keep-case|-k Keep next symbols' case (dont' upper-case it) | |
37 | ||
38 | $myname doesn't check the validity of the .config file. This is done at next | |
39 | make time. | |
40 | ||
41 | By default, $myname will upper-case the given symbol. Use --keep-case to keep | |
42 | the case of all following symbols unchanged. | |
43 | ||
44 | $myname uses 'CONFIG_' as the default symbol prefix. Set the environment | |
45 | variable CONFIG_ to the prefix to use. Eg.: CONFIG_="FOO_" $myname ... | |
46 | EOL | |
47 | exit 1 | |
48 | } | |
49 | ||
50 | checkarg() { | |
51 | ARG="$1" | |
52 | if [ "$ARG" = "" ] ; then | |
53 | usage | |
54 | fi | |
55 | case "$ARG" in | |
56 | ${CONFIG_}*) | |
57 | ARG="${ARG/${CONFIG_}/}" | |
58 | ;; | |
59 | esac | |
60 | if [ "$MUNGE_CASE" = "yes" ] ; then | |
61 | ARG="`echo $ARG | tr a-z A-Z`" | |
62 | fi | |
63 | } | |
64 | ||
65 | txt_append() { | |
66 | local anchor="$1" | |
67 | local insert="$2" | |
68 | local infile="$3" | |
69 | local tmpfile="$infile.swp" | |
70 | ||
71 | # sed append cmd: 'a\' + newline + text + newline | |
72 | cmd="$(printf "a\\%b$insert" "\n")" | |
73 | ||
74 | sed -e "/$anchor/$cmd" "$infile" >"$tmpfile" | |
75 | # replace original file with the edited one | |
76 | mv "$tmpfile" "$infile" | |
77 | } | |
78 | ||
79 | txt_subst() { | |
80 | local before="$1" | |
81 | local after="$2" | |
82 | local infile="$3" | |
83 | local tmpfile="$infile.swp" | |
84 | ||
85 | sed -e "s:$before:$after:" "$infile" >"$tmpfile" | |
86 | # replace original file with the edited one | |
87 | mv "$tmpfile" "$infile" | |
88 | } | |
89 | ||
90 | txt_delete() { | |
91 | local text="$1" | |
92 | local infile="$2" | |
93 | local tmpfile="$infile.swp" | |
94 | ||
95 | sed -e "/$text/d" "$infile" >"$tmpfile" | |
96 | # replace original file with the edited one | |
97 | mv "$tmpfile" "$infile" | |
98 | } | |
99 | ||
100 | set_var() { | |
101 | local name=$1 new=$2 before=$3 | |
102 | ||
103 | name_re="^($name=|# $name is not set)" | |
104 | before_re="^($before=|# $before is not set)" | |
105 | if test -n "$before" && grep -Eq "$before_re" "$FN"; then | |
106 | txt_append "^$before=" "$new" "$FN" | |
107 | txt_append "^# $before is not set" "$new" "$FN" | |
108 | elif grep -Eq "$name_re" "$FN"; then | |
109 | txt_subst "^$name=.*" "$new" "$FN" | |
110 | txt_subst "^# $name is not set" "$new" "$FN" | |
111 | else | |
112 | echo "$new" >>"$FN" | |
113 | fi | |
114 | } | |
115 | ||
116 | undef_var() { | |
117 | local name=$1 | |
118 | ||
119 | txt_delete "^$name=" "$FN" | |
120 | txt_delete "^# $name is not set" "$FN" | |
121 | } | |
122 | ||
123 | if [ "$1" = "--file" ]; then | |
124 | FN="$2" | |
125 | if [ "$FN" = "" ] ; then | |
126 | usage | |
127 | fi | |
128 | shift 2 | |
129 | else | |
130 | FN=.config | |
131 | fi | |
132 | ||
133 | if [ "$1" = "" ] ; then | |
134 | usage | |
135 | fi | |
136 | ||
137 | MUNGE_CASE=yes | |
138 | while [ "$1" != "" ] ; do | |
139 | CMD="$1" | |
140 | shift | |
141 | case "$CMD" in | |
142 | --keep-case|-k) | |
143 | MUNGE_CASE=no | |
144 | continue | |
145 | ;; | |
146 | --refresh) | |
147 | ;; | |
148 | --*-after|-E|-D|-M) | |
149 | checkarg "$1" | |
150 | A=$ARG | |
151 | checkarg "$2" | |
152 | B=$ARG | |
153 | shift 2 | |
154 | ;; | |
155 | -*) | |
156 | checkarg "$1" | |
157 | shift | |
158 | ;; | |
159 | esac | |
160 | case "$CMD" in | |
161 | --enable|-e) | |
162 | set_var "${CONFIG_}$ARG" "${CONFIG_}$ARG=y" | |
163 | ;; | |
164 | ||
165 | --disable|-d) | |
166 | set_var "${CONFIG_}$ARG" "# ${CONFIG_}$ARG is not set" | |
167 | ;; | |
168 | ||
169 | --module|-m) | |
170 | set_var "${CONFIG_}$ARG" "${CONFIG_}$ARG=m" | |
171 | ;; | |
172 | ||
173 | --set-str) | |
174 | # sed swallows one level of escaping, so we need double-escaping | |
175 | set_var "${CONFIG_}$ARG" "${CONFIG_}$ARG=\"${1//\"/\\\\\"}\"" | |
176 | shift | |
177 | ;; | |
178 | ||
179 | --set-val) | |
180 | set_var "${CONFIG_}$ARG" "${CONFIG_}$ARG=$1" | |
181 | shift | |
182 | ;; | |
183 | --undefine|-u) | |
184 | undef_var "${CONFIG_}$ARG" | |
185 | ;; | |
186 | ||
187 | --state|-s) | |
188 | if grep -q "# ${CONFIG_}$ARG is not set" $FN ; then | |
189 | echo n | |
190 | else | |
191 | V="$(grep "^${CONFIG_}$ARG=" $FN)" | |
192 | if [ $? != 0 ] ; then | |
193 | echo undef | |
194 | else | |
195 | V="${V/#${CONFIG_}$ARG=/}" | |
196 | V="${V/#\"/}" | |
197 | V="${V/%\"/}" | |
198 | V="${V//\\\"/\"}" | |
199 | echo "${V}" | |
200 | fi | |
201 | fi | |
202 | ;; | |
203 | ||
204 | --enable-after|-E) | |
205 | set_var "${CONFIG_}$B" "${CONFIG_}$B=y" "${CONFIG_}$A" | |
206 | ;; | |
207 | ||
208 | --disable-after|-D) | |
209 | set_var "${CONFIG_}$B" "# ${CONFIG_}$B is not set" "${CONFIG_}$A" | |
210 | ;; | |
211 | ||
212 | --module-after|-M) | |
213 | set_var "${CONFIG_}$B" "${CONFIG_}$B=m" "${CONFIG_}$A" | |
214 | ;; | |
215 | ||
216 | # undocumented because it ignores --file (fixme) | |
217 | --refresh) | |
218 | yes "" | make oldconfig | |
219 | ;; | |
220 | ||
221 | *) | |
222 | usage | |
223 | ;; | |
224 | esac | |
225 | done |