[build_ros2.sh] Create actual tmp dir and removal script.

Author: mmmarinho

.devel/build_ros2.sh

@@ -85,12 +85,19 @@ fi
 
 
 ####################################################################
-#                        Create tmp folder
+#                     Create and cd tmp folder
 ####################################################################
 
-rm -rf tmp_ros2
-mkdir tmp_ros2
-cd tmp_ros2
+TMP_DIR=`mktemp -d`
+echo "Temporary dir $TMP_DIR will be used for this build."
+cd $TMP_DIR
+
+# Create temporary folder removal script. We do not attempt to do that
+# here because a wrong rm can be catastrophic. Run at your own risk.
+echo "
+#!/bin/bash
+rm -r $TMP_DIR
+" >> "~/sas_ws/src/sas/.devel/remove_tmp_folder.sh"
 
 ####################################################################
 #                        Clone all packages