Implemented sde rename target

lib/sde-rename/target.in

@@ -15,5 +15,75 @@
 #Description: Renames an existing target identified by item to a new name.
 #Alias: tgt
 
-echo_abort 1 "Not yet implemented"
+# Parse commandline arguments.
+force=
+sourcename=
+destinationname=
+quiet=
+verbose=
+while [ "$1" ] ; do
+	case "$1" in
+	    -f|--force)
+		force=$1 ;;
+	    -q|--quiet)
+		quiet=$1 ;;
+	    -v|--verbose)
+		verbose=$1 ;;
+	    -*)
+		echo_abort 1 "Option $1 not recognized" ;;
+	    *)
+		# Only source and destination should be remain now.
+		case "$#" in
+		    2)
+			sourcename=$1; shift
+			destinationname=$1 ;;
+		    1|*)
+			echo_abort 1 "Exactly 2 arguments allowed not $#: $@" ;;
+		esac
+	break ;;
+	esac
+	shift
+done
 
+# Check for mutually exclusive options.
+if [ -n "$verbose" -a -n "$quiet" ]; then
+	# No source config no action.
+	echo_abort 1 "Options '$verbose' and '$quiet' are mutually exclusive"
+fi
+
+# Determine locations where source and destination config info should go.
+srclocation=$(sde_target_dir $sourcename)
+dstlocation=$(sde_target_dir $destinationname)
+
+# Check if the source target really exists.
+if [ ! -d $srclocation ]; then
+	# No source config no action.
+	echo_abort 1 "Source target $sourcename does not exist"
+fi
+
+# Determine if the there already exists a target under the new name.
+if [ -d $dstlocation -a -z "$force" ]; then
+	# Yes, the destination already exists and we are not
+	# allowed to overwrite it.
+	echo_abort 1 "Destination target $destinationname already exists"
+fi
+
+# If destinatin name already exists remove it.
+if [ -d $dstlocation ]; then
+	# Given destination already exists. Remove it first.
+	# TODO: check if 'sde clean' works properly.
+	sde clean target $force $quiet $verbose $destinationname
+fi
+
+# if destination still exists it was/is under revision control and
+# cannot be removed.
+if [ -d $dstlocation  ]; then
+	# Yes, the destination still exists.
+	echo_abort 1 "Destination target $destinationname already exists" \
+		"and can NOT be replaced, since it is under revision." \
+		"however it has been cleaned."
+fi
+
+# Now we can safely move the source target to the destination
+echo_msg "Renaming target from $sourcename to $destinationname"
+mv $srclocation $dstlocation