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 9usage() { 10 cat >&2 <<EOL 11Manipulate options in a .config file from the command line. 12Usage: 13$myname options command ... 14commands: 15 --enable|-e option Enable option 16 --disable|-d option Disable option 17 --module|-m option Turn option into a module 18 --set-str option string 19 Set option to "string" 20 --set-val option value 21 Set option to value 22 --undefine|-u option Undefine option 23 --state|-s option Print state of option (n,y,m,undef) 24 25 --enable-after|-E beforeopt option 26 Enable option directly after other option 27 --disable-after|-D beforeopt option 28 Disable option directly after other option 29 --module-after|-M beforeopt option 30 Turn option into module directly after other option 31 32 commands can be repeated multiple times 33 34options: 35 --file config-file .config file to change (default .config) 36 --keep-case|-k Keep next symbols' case (dont' upper-case it) 37 38$myname doesn't check the validity of the .config file. This is done at next 39make time. 40 41By default, $myname will upper-case the given symbol. Use --keep-case to keep 42the case of all following symbols unchanged. 43 44$myname uses 'CONFIG_' as the default symbol prefix. Set the environment 45variable CONFIG_ to the prefix to use. Eg.: CONFIG_="FOO_" $myname ... 46EOL 47 exit 1 48} 49 50checkarg() { 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 65txt_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 79txt_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 90txt_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 100set_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 116undef_var() { 117 local name=$1 118 119 txt_delete "^$name=" "$FN" 120 txt_delete "^# $name is not set" "$FN" 121} 122 123if [ "$1" = "--file" ]; then 124 FN="$2" 125 if [ "$FN" = "" ] ; then 126 usage 127 fi 128 shift 2 129else 130 FN=.config 131fi 132 133if [ "$1" = "" ] ; then 134 usage 135fi 136 137MUNGE_CASE=yes 138while [ "$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 225done 226 227