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