Add bash functions

rc/01-functions.sh

@@ -31,12 +31,24 @@ function append_path() {
   fi
 }
 
+function append_path_try() {
+  if [[ -e "$1" ]]; then
+    append_pat "$1"
+  fi
+}
+
 function prepend_path() {
   if ! in_path "$1"; then
     PATH="$1:$PATH"
   fi
 }
 
+function prepend_path_try() {
+  if [[ -e "$1" ]]; then
+    prepend_path "$1"
+  fi
+}
+
 function uniq_path() {
   echo "$PATH" | tr ":" "\n" | awk '!seen[$0]++' | tr "\n" ":" | sed -r 's/:+/:/g' | sed -r 's/^:|:$//g'
 }
@@ -71,7 +83,7 @@ function dump_args() {
   done
 }
 
-function try_source() {
+function source_try() {
   local script="$1"
   if [[ -e "$script" ]]; then
     source "$script"