1 files changed, 41 insertions, 46 deletions

diff --git a/scripts/config b/scripts/config
index db6084b78a10..608d7fdb13e8 100755
--- a/scripts/config
+++ b/scripts/config
@@ -9,8 +9,10 @@ config options command ...
 commands:
         --enable|-e option   Enable option
         --disable|-d option  Disable option
-        --module|-m option      Turn option into a module
-        --state|-s option       Print state of option (n,y,m,undef)
+        --module|-m option   Turn option into a module
+        --set-str option value
+                             Set option to "value"
+        --state|-s option    Print state of option (n,y,m,undef)
 
         --enable-after|-E beforeopt option
                              Enable option directly after other option
@@ -26,8 +28,6 @@ options:
 
 config doesn't check the validity of the .config file. This is done at next
  make time.
-The options need to be already in the file before they can be changed,
-but sometimes you can cheat with the --*-after options.
 EOL
         exit 1
 }
@@ -45,8 +45,18 @@ checkarg() {
         ARG="`echo $ARG | tr a-z A-Z`"
 }
 
-replace() {
-        sed -i -e "$@" $FN
+set_var() {
+        local name=$1 new=$2 before=$3
+
+        name_re="^($name=|# $name is not set)"
+        before_re="^($before=|# $before is not set)"
+        if test -n "$before" && grep -Eq "$before_re" "$FN"; then
+                sed -ri "/$before_re/a $new" "$FN"
+        elif grep -Eq "$name_re" "$FN"; then
+                sed -ri "s:$name_re.*:$new:" "$FN"
+        else
+                echo "$new" >>"$FN"
+        fi
 }
 
 if [ "$1" = "--file" ]; then
@@ -54,8 +64,7 @@ if [ "$1" = "--file" ]; then
         if [ "$FN" = "" ] ; then
                 usage
         fi
-        shift
-        shift
+        shift 2
 else
         FN=.config
 fi
@@ -68,27 +77,39 @@ while [ "$1" != "" ] ; do
         CMD="$1"
         shift
         case "$CMD" in
-        --enable|-e)
+        --refresh)
+                ;;
+        --*-after)
+                checkarg "$1"
+                A=$ARG
+                checkarg "$2"
+                B=$ARG
+                shift 2
+                ;;
+        --*)
                 checkarg "$1"
-                replace "s/# CONFIG_$ARG is not set/CONFIG_$ARG=y/"
                 shift
                 ;;
+        esac
+        case "$CMD" in
+        --enable|-e)
+                set_var "CONFIG_$ARG" "CONFIG_$ARG=y"
+                ;;
 
         --disable|-d)
-                checkarg "$1"
-                replace "s/CONFIG_$ARG=[my]/# CONFIG_$ARG is not set/"
-                shift
+                set_var "CONFIG_$ARG" "# CONFIG_$ARG is not set"
                 ;;
 
         --module|-m)
-                checkarg "$1"
-                replace "s/CONFIG_$ARG=y/CONFIG_$ARG=m/" \
-                        -e "s/# CONFIG_$ARG is not set/CONFIG_$ARG=m/"
+                set_var "CONFIG_$ARG" "CONFIG_$ARG=m"
+                ;;
+
+        --set-str)
+                set_var "CONFIG_$ARG" "CONFIG_$ARG=\"$1\""
                 shift
                 ;;
 
         --state|-s)
-                checkarg "$1"
                 if grep -q "# CONFIG_$ARG is not set" $FN ; then
                         echo n
                 else
@@ -101,44 +122,18 @@ while [ "$1" != "" ] ; do
                                 echo "$V"
                         fi
                 fi
-                shift
                 ;;
 
         --enable-after|-E)
-                checkarg "$1"
-                A=$ARG
-                checkarg "$2"
-                B=$ARG
-                replace "/CONFIG_$A=[my]/aCONFIG_$B=y" \
-                        -e "/# CONFIG_$ARG is not set/a/CONFIG_$ARG=y" \
-                        -e "s/# CONFIG_$ARG is not set/CONFIG_$ARG=y/"
-                shift
-                shift
+                set_var "CONFIG_$B" "CONFIG_$B=y" "CONFIG_$A"
                 ;;
 
         --disable-after|-D)
-                checkarg "$1"
-                A=$ARG
-                checkarg "$2"
-                B=$ARG
-                replace "/CONFIG_$A=[my]/a# CONFIG_$B is not set" \
-                -e "/# CONFIG_$ARG is not set/a/# CONFIG_$ARG is not set" \
-                -e "s/CONFIG_$ARG=[my]/# CONFIG_$ARG is not set/"
-                shift
-                shift
+                set_var "CONFIG_$B" "# CONFIG_$B is not set" "CONFIG_$A"
                 ;;
 
         --module-after|-M)
-                checkarg "$1"
-                A=$ARG
-                checkarg "$2"
-                B=$ARG
-                replace "/CONFIG_$A=[my]/aCONFIG_$B=m" \
-                        -e "/# CONFIG_$ARG is not set/a/CONFIG_$ARG=m" \
-                        -e "s/CONFIG_$ARG=y/CONFIG_$ARG=m/" \
-                        -e "s/# CONFIG_$ARG is not set/CONFIG_$ARG=m/"
-                shift
-                shift
+                set_var "CONFIG_$B" "CONFIG_$B=m" "CONFIG_$A"
                 ;;
 
         # undocumented because it ignores --file (fixme)