Add try_source function

rc/01-functions.sh

@@ -66,7 +66,15 @@ function source_directory() {
 
 # use: dump_args "$@"
 function dump_args() {
-  for i in $*; do 
-    echo $i 
+  for i in $*; do
+    echo $i
   done
 }
+
+function try_source() {
+  local script="$1"
+  if [[ -e "$script" ]]; then
+    source "$script"
+  fi
+}
+