rvm-update-head in rvm-1.0.20

- old
+ new
@@ -13,23 +13,46 @@
   done
 fi
 
 rvm_path="${rvm_path:-"$HOME/.rvm"}"
 
-mkdir -p "$rvm_path/src/"
+if [[ ! -d "$rvm_path/src" ]] ; then
+  mkdir -p "$rvm_path/src/"
+fi
 
 builtin cd "$rvm_path/src"
 
-rm -rf ./rvm/
+if [[ -d ./rvm ]] ; then
+  rm -rf ./rvm/
+fi
 
-url="http://github.com/wayneeseguin/rvm.git"
+http_url="http://github.com/wayneeseguin/rvm.git"
 
-if ! git clone "$url" ; then
-  printf "ERROR: Cloning from $url failed.\n"
-  exit 1
+if ! git clone "$http_url" ; then
+
+  printf "
+ERROR: Cloning from $http_url failed,
+       perhaps your git version does not support the http protocol?
+       Trying git:// protocol now.
+"
+
+  git_url="git://github.com/wayneeseguin/rvm.git"
+
+  if ! git clone "$git_url" ; then
+
+    printf "
+ERROR: Cloning from $git_url failed, out of ideas... halting.
+"
+
+    exit 1
+
+  fi
+
 fi
 
 builtin cd rvm
 
 chmod +x "$PWD/scripts/install"
 
 exec "$PWD/scripts/install"
+
+exit $?