[script] generate cscope and ctags for android

scripts/generate_cscopefile.sh

@@ -1,7 +1,38 @@
-DIR="dalvik device frameworks hardware libnativehelper system "
+DIR="bionic dalvik device frameworks hardware libnativehelper system packages"
 TMP=$(mktemp /tmp/XXXXX-cscope.files)
 
-echo "$TMP"
+gettop ()
+{
+    local TOPFILE=build/core/envsetup.mk;
+    if [ -n "$TOP" -a -f "$TOP/$TOPFILE" ]; then
+        echo $TOP;
+    else
+        if [ -f $TOPFILE ]; then
+            PWD= /bin/pwd;
+        else
+            local HERE=$PWD;
+    T=;
+    while [ \( ! \( -f $TOPFILE \) \) -a \( $PWD != "/" \) ]; do
+        \cd ..;
+    T=`PWD= /bin/pwd`;
+    done;
+    \cd $HERE;
+    if [ -f "$T/$TOPFILE" ]; then
+        echo $T;
+    fi;
+    fi;
+    fi
+}
+
+
+T=$(gettop);
+if [ "$T" ]; then
+	\cd $(gettop);
+else
+	echo "Couldn't locate the top of the tree.  Try setting TOP.";
+	exit
+fi
+
 for dir in $DIR;
 do
 	echo "Looking for files in $dir"
@@ -11,4 +42,7 @@ done
 echo "generate cscope"
 cscope -bkq -i $TMP
 
+echo "generate ctags"
+ctags --c-kinds=+px --c++-kinds=+px --fields=+iaS --extra=+q -L $TMP
+
 rm $TMP