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 36 commands can be repeated multiple times 37 38options: 39 --file config-file .config file to change (default .config) 40 --keep-case|-k Keep next symbols' case (dont' upper-case it) 41 42$myname doesn't check the validity of the .config file. This is done at next 43make time. 44 45By default, $myname will upper-case the given symbol. Use --keep-case to keep 46the case of all following symbols unchanged. 47 48$myname uses 'CONFIG_' as the default symbol prefix. Set the environment 49variable CONFIG_ to the prefix to use. Eg.: CONFIG_="FOO_" $myname ... 50EOL 51 exit 1 52} 53 54checkarg() { 55 ARG="$1" 56 if [ "$ARG" = "" ] ; then 57 usage 58 fi 59 case "$ARG" in 60 ${CONFIG_}*) 61 ARG="${ARG/${CONFIG_}/}" 62 ;; 63 esac 64 if [ "$MUNGE_CASE" = "yes" ] ; then 65 ARG="`echo $ARG | tr a-z A-Z`" 66 fi 67} 68 69txt_append() { 70 local anchor="$1" 71 local insert="$2" 72 local infile="$3" 73 local tmpfile="$infile.swp" 74 75 # sed append cmd: 'a\' + newline + text + newline 76 cmd="$(printf "a\\%b$insert" "\n")" 77 78 sed -e "/$anchor/$cmd" "$infile" >"$tmpfile" 79 # replace original file with the edited one 80 mv "$tmpfile" "$infile" 81} 82 83txt_subst() { 84 local before="$1" 85 local after="$2" 86 local infile="$3" 87 local tmpfile="$infile.swp" 88 89 sed -e "s$SED_DELIM$before$SED_DELIM$after$SED_DELIM" "$infile" >"$tmpfile" 90 # replace original file with the edited one 91 mv "$tmpfile" "$infile" 92} 93 94txt_delete() { 95 local text="$1" 96 local infile="$2" 97 local tmpfile="$infile.swp" 98 99 sed -e "/$text/d" "$infile" >"$tmpfile" 100 # replace original file with the edited one 101 mv "$tmpfile" "$infile" 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 "^$before=" "$new" "$FN" 111 txt_append "^# $before is not set" "$new" "$FN" 112 elif grep -Eq "$name_re" "$FN"; then 113 txt_subst "^$name=.*" "$new" "$FN" 114 txt_subst "^# $name is not set" "$new" "$FN" 115 else 116 echo "$new" >>"$FN" 117 fi 118} 119 120undef_var() { 121 local name=$1 122 123 txt_delete "^$name=" "$FN" 124 txt_delete "^# $name is not set" "$FN" 125} 126 127if [ "$1" = "--file" ]; then 128 FN="$2" 129 if [ "$FN" = "" ] ; then 130 usage 131 fi 132 shift 2 133else 134 FN=.config 135fi 136 137if [ "$1" = "" ] ; then 138 usage 139fi 140 141MUNGE_CASE=yes 142while [ "$1" != "" ] ; do 143 CMD="$1" 144 shift 145 case "$CMD" in 146 --keep-case|-k) 147 MUNGE_CASE=no 148 continue 149 ;; 150 --refresh) 151 ;; 152 --*-after|-E|-D|-M) 153 checkarg "$1" 154 A=$ARG 155 checkarg "$2" 156 B=$ARG 157 shift 2 158 ;; 159 -*) 160 checkarg "$1" 161 shift 162 ;; 163 esac 164 case "$CMD" in 165 --enable|-e) 166 set_var "${CONFIG_}$ARG" "${CONFIG_}$ARG=y" 167 ;; 168 169 --disable|-d) 170 set_var "${CONFIG_}$ARG" "# ${CONFIG_}$ARG is not set" 171 ;; 172 173 --module|-m) 174 set_var "${CONFIG_}$ARG" "${CONFIG_}$ARG=m" 175 ;; 176 177 --set-str) 178 # sed swallows one level of escaping, so we need double-escaping 179 set_var "${CONFIG_}$ARG" "${CONFIG_}$ARG=\"${1//\"/\\\\\"}\"" 180 shift 181 ;; 182 183 --set-val) 184 set_var "${CONFIG_}$ARG" "${CONFIG_}$ARG=$1" 185 shift 186 ;; 187 --undefine|-u) 188 undef_var "${CONFIG_}$ARG" 189 ;; 190 191 --state|-s) 192 if grep -q "# ${CONFIG_}$ARG is not set" $FN ; then 193 echo n 194 else 195 V="$(grep "^${CONFIG_}$ARG=" $FN)" 196 if [ $? != 0 ] ; then 197 echo undef 198 else 199 V="${V/#${CONFIG_}$ARG=/}" 200 V="${V/#\"/}" 201 V="${V/%\"/}" 202 V="${V//\\\"/\"}" 203 echo "${V}" 204 fi 205 fi 206 ;; 207 208 --enable-after|-E) 209 set_var "${CONFIG_}$B" "${CONFIG_}$B=y" "${CONFIG_}$A" 210 ;; 211 212 --disable-after|-D) 213 set_var "${CONFIG_}$B" "# ${CONFIG_}$B is not set" "${CONFIG_}$A" 214 ;; 215 216 --module-after|-M) 217 set_var "${CONFIG_}$B" "${CONFIG_}$B=m" "${CONFIG_}$A" 218 ;; 219 220 # undocumented because it ignores --file (fixme) 221 --refresh) 222 yes "" | make oldconfig 223 ;; 224 225 *) 226 echo "bad command: $CMD" >&2 227 usage 228 ;; 229 esac 230done 231