1 files changed, 150 insertions, 0 deletions

diff --git a/scripts/config b/scripts/config
new file mode 100755
index 000000000000..68b9761cdc38
--- /dev/null
+++ b/scripts/config
@@ -0,0 +1,150 @@
+#!/bin/bash
+# Manipulate options in a .config file from the command line
+
+usage() {
+        cat >&2 <<EOL
+Manipulate options in a .config file from the command line.
+Usage:
+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)
+
+        --enable-after|-E beforeopt option
+                             Enable option directly after other option
+        --disable-after|-D beforeopt option
+                             Disable option directly after other option
+        --module-after|-M beforeopt option
+                             Turn option into module directly after other option
+
+        commands can be repeated multiple times
+
+options:
+        --file .config file to change (default .config)
+
+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
+}
+
+checkarg() {
+        ARG="$1"
+        if [ "$ARG" = "" ] ; then
+                usage
+        fi
+        case "$ARG" in
+        CONFIG_*)
+                ARG="${ARG/CONFIG_/}"
+                ;;
+        esac
+        ARG="`echo $ARG | tr a-z A-Z`"
+}
+
+replace() {
+        sed -i -e "$@" $FN
+}
+
+if [ "$1" = "--file" ]; then
+        FN="$2"
+        if [ "$FN" = "" ] ; then
+                usage
+        fi
+        shift
+        shift
+else
+        FN=.config
+fi
+
+while [ "$1" != "" ] ; do
+        CMD="$1"
+        shift
+        case "$CMD" in
+        --enable|-e)
+                checkarg "$1"
+                replace "s/# CONFIG_$ARG is not set/CONFIG_$ARG=y/"
+                shift
+                ;;
+
+        --disable|-d)
+                checkarg "$1"
+                replace "s/CONFIG_$ARG=[my]/# CONFIG_$ARG is not set/"
+                shift
+                ;;
+
+        --module|-m)
+                checkarg "$1"
+                replace "s/CONFIG_$ARG=y/CONFIG_$ARG=m/" \
+                        -e "s/# CONFIG_$ARG is not set/CONFIG_$ARG=m/"
+                shift
+                ;;
+
+        --state|-s)
+                checkarg "$1"
+                if grep -q "# CONFIG_$ARG is not set" $FN ; then
+                        echo n
+                else
+                        V="$(grep "^CONFIG_$ARG=" $FN)"
+                        if [ $? != 0 ] ; then
+                                echo undef
+                        else
+                                V="${V/CONFIG_$ARG=/}"
+                                V="${V/\"/}"
+                                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
+                ;;
+
+        --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
+                ;;
+
+        --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
+                ;;
+
+        # undocumented because it ignores --file (fixme)
+        --refresh)
+                yes "" | make oldconfig
+                ;;
+
+        *)
+                usage
+                ;;
+        esac
+done
+