1#!/usr/bin/env bash 2# SPDX-License-Identifier: GPL-2.0 3# Manipulate options in a .config file from the command line 4 5myname=${0##*/} 6 7# If no prefix forced, use the default CONFIG_ 8CONFIG_="${CONFIG_-CONFIG_}" 9 10# We use an uncommon delimiter for sed substitutions 11SED_DELIM=$(echo -en "\001") 12 13usage() { 14 cat >&2 <<EOL 15Manipulate options in a .config file from the command line. 16Usage: 17$myname options command ... 18commands: 19 --enable|-e option Enable option 20 --disable|-d option Disable option 21 --module|-m option Turn option into a module 22 --set-str option string 23 Set option to "string" 24 --set-val option value 25 Set option to value 26 --undefine|-u option Undefine option 27 --state|-s option Print state of option (n,y,m,undef) 28 29 --enable-after|-E beforeopt option 30 Enable option directly after other option 31 --disable-after|-D beforeopt option 32 Disable option directly after other option 33 --module-after|-M beforeopt option 34 Turn option into module directly after other option 35 --refresh Refresh the config using old settings 36 37 commands can be repeated multiple times 38 39options: 40 --file config-file .config file to change (default .config) 41 --keep-case|-k Keep next symbols' case (don't upper-case it) 42 43$myname doesn't check the validity of the .config file. This is done at next 44make time. 45 46By default, $myname will upper-case the given symbol. Use --keep-case to keep 47the case of all following symbols unchanged. 48 49$myname uses 'CONFIG_' as the default symbol prefix. Set the environment 50variable CONFIG_ to the prefix to use. Eg.: CONFIG_="FOO_" $myname ... 51EOL 52 exit 1 53} 54 55checkarg() { 56 ARG="$1" 57 if [ "$ARG" = "" ] ; then 58 usage 59 fi 60 case "$ARG" in 61 ${CONFIG_}*) 62 ARG="${ARG/${CONFIG_}/}" 63 ;; 64 esac 65 if [ "$MUNGE_CASE" = "yes" ] ; then 66 ARG="`echo $ARG | tr a-z A-Z`" 67 fi 68} 69 70txt_append() { 71 local anchor="$1" 72 local insert="$2" 73 local infile="$3" 74 75 # sed append cmd: 'a\' + newline + text + newline 76 cmd="$(printf "a\\%b$insert" "\n")" 77 78 # We don't really need a backup file, but in-place editing with backup 79 # skipped is not portable due to different implementations parsing 80 # arguments in incompatible manners. 81 # Create a backup file anyway to ensure portability. The file will be 82 # deleted on exit. 83 sed -E -i.swp -e "/$anchor/$cmd" "$infile" 84 SED_EDITED=1 85} 86 87txt_subst() { 88 local before="$1" 89 local after="$2" 90 local infile="$3" 91 92 sed -E -i.swp -e "s$SED_DELIM$before$SED_DELIM$after$SED_DELIM" "$infile" 93 SED_EDITED=1 94} 95 96txt_delete() { 97 local text="$1" 98 local infile="$2" 99 100 sed -E -i.swp -e "/$text/d" "$infile" 101 SED_EDITED=1 102} 103 104set_var() { 105 local name=$1 new=$2 before=$3 106 107 name_re="^($name=.*|# $name is not set)" 108 before_re="^($before=|# $before is not set)" 109 if test -n "$before" && grep -Eq "$before_re" "$FN"; then 110 txt_append "$before_re" "$new" "$FN" 111 elif grep -Eq "$name_re" "$FN"; then 112 txt_subst "$name_re" "$new" "$FN" 113 else 114 echo "$new" >>"$FN" 115 fi 116} 117 118undef_var() { 119 local name=$1 120 121 txt_delete "^($name=|# $name is not set)" "$FN" 122} 123 124SED_EDITED=0 125on_exit() { 126 if [ "$SED_EDITED" -ge 1 ]; then 127 rm -f "$FN.swp" 128 fi 129} 130trap on_exit EXIT 131 132FN=.config 133CMDS=() 134while [[ $# -gt 0 ]]; do 135 if [ "$1" = "--file" ]; then 136 if [ "$2" = "" ]; then 137 usage 138 fi 139 FN="$2" 140 shift 2 141 else 142 CMDS+=("$1") 143 shift 144 fi 145done 146 147set -- "${CMDS[@]}" 148if [ "$1" = "" ] ; then 149 usage 150fi 151 152MUNGE_CASE=yes 153while [ "$1" != "" ] ; do 154 CMD="$1" 155 shift 156 case "$CMD" in 157 --keep-case|-k) 158 MUNGE_CASE=no 159 continue 160 ;; 161 --refresh) 162 ;; 163 --*-after|-E|-D|-M) 164 checkarg "$1" 165 A=$ARG 166 checkarg "$2" 167 B=$ARG 168 shift 2 169 ;; 170 -*) 171 checkarg "$1" 172 shift 173 ;; 174 esac 175 case "$CMD" in 176 --enable|-e) 177 set_var "${CONFIG_}$ARG" "${CONFIG_}$ARG=y" 178 ;; 179 180 --disable|-d) 181 set_var "${CONFIG_}$ARG" "# ${CONFIG_}$ARG is not set" 182 ;; 183 184 --module|-m) 185 set_var "${CONFIG_}$ARG" "${CONFIG_}$ARG=m" 186 ;; 187 188 --set-str) 189 # sed swallows one level of escaping, so we need double-escaping 190 set_var "${CONFIG_}$ARG" "${CONFIG_}$ARG=\"${1//\"/\\\\\"}\"" 191 shift 192 ;; 193 194 --set-val) 195 set_var "${CONFIG_}$ARG" "${CONFIG_}$ARG=$1" 196 shift 197 ;; 198 --undefine|-u) 199 undef_var "${CONFIG_}$ARG" 200 ;; 201 202 --state|-s) 203 if grep -q "# ${CONFIG_}$ARG is not set" $FN ; then 204 echo n 205 else 206 V="$(grep "^${CONFIG_}$ARG=" $FN)" 207 if [ $? != 0 ] ; then 208 echo undef 209 else 210 V="${V/#${CONFIG_}$ARG=/}" 211 V="${V/#\"/}" 212 V="${V/%\"/}" 213 V="${V//\\\"/\"}" 214 echo "${V}" 215 fi 216 fi 217 ;; 218 219 --enable-after|-E) 220 set_var "${CONFIG_}$B" "${CONFIG_}$B=y" "${CONFIG_}$A" 221 ;; 222 223 --disable-after|-D) 224 set_var "${CONFIG_}$B" "# ${CONFIG_}$B is not set" "${CONFIG_}$A" 225 ;; 226 227 --module-after|-M) 228 set_var "${CONFIG_}$B" "${CONFIG_}$B=m" "${CONFIG_}$A" 229 ;; 230 231 --refresh) 232 yes "" | make oldconfig KCONFIG_CONFIG=$FN 233 ;; 234 235 *) 236 echo "bad command: $CMD" >&2 237 usage 238 ;; 239 esac 240done 241