| 1 | #!/bin/bash |
| 2 | # SPDX-License-Identifier: GPL-2.0 |
| 3 | # Manipulate options in a .config file from the command line |
| 4 | |
| 5 | myname=${0##*/} |
| 6 | |
| 7 | # If no prefix forced, use the default CONFIG_ |
| 8 | CONFIG_="${CONFIG_-CONFIG_}" |
| 9 | |
| 10 | usage() { |
| 11 | cat >&2 <<EOL |
| 12 | Manipulate options in a .config file from the command line. |
| 13 | Usage: |
| 14 | $myname options command ... |
| 15 | commands: |
| 16 | --enable|-e option Enable option |
| 17 | --disable|-d option Disable option |
| 18 | --module|-m option Turn option into a module |
| 19 | --set-str option string |
| 20 | Set option to "string" |
| 21 | --set-val option value |
| 22 | Set option to value |
| 23 | --undefine|-u option Undefine option |
| 24 | --state|-s option Print state of option (n,y,m,undef) |
| 25 | |
| 26 | --enable-after|-E beforeopt option |
| 27 | Enable option directly after other option |
| 28 | --disable-after|-D beforeopt option |
| 29 | Disable option directly after other option |
| 30 | --module-after|-M beforeopt option |
| 31 | Turn option into module directly after other option |
| 32 | |
| 33 | commands can be repeated multiple times |
| 34 | |
| 35 | options: |
| 36 | --file config-file .config file to change (default .config) |
| 37 | --keep-case|-k Keep next symbols' case (dont' upper-case it) |
| 38 | |
| 39 | $myname doesn't check the validity of the .config file. This is done at next |
| 40 | make time. |
| 41 | |
| 42 | By default, $myname will upper-case the given symbol. Use --keep-case to keep |
| 43 | the case of all following symbols unchanged. |
| 44 | |
| 45 | $myname uses 'CONFIG_' as the default symbol prefix. Set the environment |
| 46 | variable CONFIG_ to the prefix to use. Eg.: CONFIG_="FOO_" $myname ... |
| 47 | EOL |
| 48 | exit 1 |
| 49 | } |
| 50 | |
| 51 | checkarg() { |
| 52 | ARG="$1" |
| 53 | if [ "$ARG" = "" ] ; then |
| 54 | usage |
| 55 | fi |
| 56 | case "$ARG" in |
| 57 | ${CONFIG_}*) |
| 58 | ARG="${ARG/${CONFIG_}/}" |
| 59 | ;; |
| 60 | esac |
| 61 | if [ "$MUNGE_CASE" = "yes" ] ; then |
| 62 | ARG="`echo $ARG | tr a-z A-Z`" |
| 63 | fi |
| 64 | } |
| 65 | |
| 66 | txt_append() { |
| 67 | local anchor="$1" |
| 68 | local insert="$2" |
| 69 | local infile="$3" |
| 70 | local tmpfile="$infile.swp" |
| 71 | |
| 72 | # sed append cmd: 'a\' + newline + text + newline |
| 73 | cmd="$(printf "a\\%b$insert" "\n")" |
| 74 | |
| 75 | sed -e "/$anchor/$cmd" "$infile" >"$tmpfile" |
| 76 | # replace original file with the edited one |
| 77 | mv "$tmpfile" "$infile" |
| 78 | } |
| 79 | |
| 80 | txt_subst() { |
| 81 | local before="$1" |
| 82 | local after="$2" |
| 83 | local infile="$3" |
| 84 | local tmpfile="$infile.swp" |
| 85 | |
| 86 | sed -e "s:$before:$after:" "$infile" >"$tmpfile" |
| 87 | # replace original file with the edited one |
| 88 | mv "$tmpfile" "$infile" |
| 89 | } |
| 90 | |
| 91 | txt_delete() { |
| 92 | local text="$1" |
| 93 | local infile="$2" |
| 94 | local tmpfile="$infile.swp" |
| 95 | |
| 96 | sed -e "/$text/d" "$infile" >"$tmpfile" |
| 97 | # replace original file with the edited one |
| 98 | mv "$tmpfile" "$infile" |
| 99 | } |
| 100 | |
| 101 | set_var() { |
| 102 | local name=$1 new=$2 before=$3 |
| 103 | |
| 104 | name_re="^($name=|# $name is not set)" |
| 105 | before_re="^($before=|# $before is not set)" |
| 106 | if test -n "$before" && grep -Eq "$before_re" "$FN"; then |
| 107 | txt_append "^$before=" "$new" "$FN" |
| 108 | txt_append "^# $before is not set" "$new" "$FN" |
| 109 | elif grep -Eq "$name_re" "$FN"; then |
| 110 | txt_subst "^$name=.*" "$new" "$FN" |
| 111 | txt_subst "^# $name is not set" "$new" "$FN" |
| 112 | else |
| 113 | echo "$new" >>"$FN" |
| 114 | fi |
| 115 | } |
| 116 | |
| 117 | undef_var() { |
| 118 | local name=$1 |
| 119 | |
| 120 | txt_delete "^$name=" "$FN" |
| 121 | txt_delete "^# $name is not set" "$FN" |
| 122 | } |
| 123 | |
| 124 | if [ "$1" = "--file" ]; then |
| 125 | FN="$2" |
| 126 | if [ "$FN" = "" ] ; then |
| 127 | usage |
| 128 | fi |
| 129 | shift 2 |
| 130 | else |
| 131 | FN=.config |
| 132 | fi |
| 133 | |
| 134 | if [ "$1" = "" ] ; then |
| 135 | usage |
| 136 | fi |
| 137 | |
| 138 | MUNGE_CASE=yes |
| 139 | while [ "$1" != "" ] ; do |
| 140 | CMD="$1" |
| 141 | shift |
| 142 | case "$CMD" in |
| 143 | --keep-case|-k) |
| 144 | MUNGE_CASE=no |
| 145 | continue |
| 146 | ;; |
| 147 | --refresh) |
| 148 | ;; |
| 149 | --*-after|-E|-D|-M) |
| 150 | checkarg "$1" |
| 151 | A=$ARG |
| 152 | checkarg "$2" |
| 153 | B=$ARG |
| 154 | shift 2 |
| 155 | ;; |
| 156 | -*) |
| 157 | checkarg "$1" |
| 158 | shift |
| 159 | ;; |
| 160 | esac |
| 161 | case "$CMD" in |
| 162 | --enable|-e) |
| 163 | set_var "${CONFIG_}$ARG" "${CONFIG_}$ARG=y" |
| 164 | ;; |
| 165 | |
| 166 | --disable|-d) |
| 167 | set_var "${CONFIG_}$ARG" "# ${CONFIG_}$ARG is not set" |
| 168 | ;; |
| 169 | |
| 170 | --module|-m) |
| 171 | set_var "${CONFIG_}$ARG" "${CONFIG_}$ARG=m" |
| 172 | ;; |
| 173 | |
| 174 | --set-str) |
| 175 | # sed swallows one level of escaping, so we need double-escaping |
| 176 | set_var "${CONFIG_}$ARG" "${CONFIG_}$ARG=\"${1//\"/\\\\\"}\"" |
| 177 | shift |
| 178 | ;; |
| 179 | |
| 180 | --set-val) |
| 181 | set_var "${CONFIG_}$ARG" "${CONFIG_}$ARG=$1" |
| 182 | shift |
| 183 | ;; |
| 184 | --undefine|-u) |
| 185 | undef_var "${CONFIG_}$ARG" |
| 186 | ;; |
| 187 | |
| 188 | --state|-s) |
| 189 | if grep -q "# ${CONFIG_}$ARG is not set" $FN ; then |
| 190 | echo n |
| 191 | else |
| 192 | V="$(grep "^${CONFIG_}$ARG=" $FN)" |
| 193 | if [ $? != 0 ] ; then |
| 194 | echo undef |
| 195 | else |
| 196 | V="${V/#${CONFIG_}$ARG=/}" |
| 197 | V="${V/#\"/}" |
| 198 | V="${V/%\"/}" |
| 199 | V="${V//\\\"/\"}" |
| 200 | echo "${V}" |
| 201 | fi |
| 202 | fi |
| 203 | ;; |
| 204 | |
| 205 | --enable-after|-E) |
| 206 | set_var "${CONFIG_}$B" "${CONFIG_}$B=y" "${CONFIG_}$A" |
| 207 | ;; |
| 208 | |
| 209 | --disable-after|-D) |
| 210 | set_var "${CONFIG_}$B" "# ${CONFIG_}$B is not set" "${CONFIG_}$A" |
| 211 | ;; |
| 212 | |
| 213 | --module-after|-M) |
| 214 | set_var "${CONFIG_}$B" "${CONFIG_}$B=m" "${CONFIG_}$A" |
| 215 | ;; |
| 216 | |
| 217 | # undocumented because it ignores --file (fixme) |
| 218 | --refresh) |
| 219 | yes "" | make oldconfig |
| 220 | ;; |
| 221 | |
| 222 | *) |
| 223 | usage |
| 224 | ;; |
| 225 | esac |
| 226 | done |