install in rvm-1.0.10 vs install in rvm-1.0.11

@@ -1,8 +1,9 @@
 #!/usr/bin/env bash
 
-#set -u # Error on uninitialized variables.
+set -o errtrace
+export PS4='+[${BASH_SOURCE}] : ${LINENO} : ${FUNCNAME[0]:+${FUNCNAME[0]}() $ }'
 
 if [[ -z "$rvm_selfcontained" ]]; then
   if [[ "root" = "$(whoami)" ]] || [[ -n "$rvm_prefix" && "$rvm_prefix" != "$HOME"/* ]]; then
     export rvm_selfcontained=0
   else
@@ -11,10 +12,11 @@
 fi
 
 unset rvm_auto_flag
 
 install_source_path="$(dirname "$0" | sed 's#\/scripts$##')"
+
 if [[ -d "$install_source_path/scripts" ]] && [[ -s "$install_source_path/scripts/utility" ]] ; then
   builtin cd "$install_source_path"
 fi
 
 source scripts/version
@@ -32,25 +34,16 @@
     --version : display rvm package version
   "
 }
 
 check_rubyopt_conditions() {
-  if [[ -n "$RUBYOPT" ]]; then
+  if [[ -n "${RUBYOPT:-""}" ]]; then
     printf "\n\nWARNING: You have RUBYOPT set in your current environment. This may interfere with normal rvm"
     printf "\n operation. If errors show up, please try unsetting RUBYOPT first.\n"
   fi
 }
 
-# Regenerates a users wrappers as part of the update.
-regenerate_wrappers() {
-  printf "\n"
-  if command -v __rvm_regenerate_wrappers >/dev/null; then
-    __rvm_regenerate_wrappers
-  fi
-  printf "\n"
-}
-
 andand_return_instructions() {
   printf "
   This means that if you see something like:
 
     '[ -z \"\$PS1\" ] && return'
@@ -156,32 +149,43 @@
   * If you wish to have the 'pretty colors' again, set in ~/.rvmrc:
     export rvm_pretty_print_flag=1
 "
 }
 
-if echo "$*" | grep -q 'trace' ; then echo "$*" ; env | grep '^rvm_' ; set -x ; fi
+set -o noclobber
+set -o nounset
 
 while [[ $# -gt 0 ]] ; do
   token="$1" ; shift
   case "$token" in
     --auto)    rvm_auto_flag=1 ;;
     --prefix)  rvm_prefix="$1" ; shift ;;
     --version) rvm_path="$PWD" ; __rvm_version ; unset rvm_path ; exit ;;
+    --debug)
+      set -o verbose
+      ;;
+    --trace)
+      echo "$*"
+      env | grep '^rvm_'
+      set -o xtrace
+      ;;
     --help|*)  usage ;;
   esac
 done
 
-if [[ -z "$rvm_prefix" ]] ; then
+if [[ -z "${rvm_prefix:-""}" ]] ; then
   __rvm_load_rvmrc
   if [[ "$rvm_selfcontained" = "0" ]] ; then
     rvm_prefix="${rvm_prefix:-"/usr/local/"}"
   else
     rvm_prefix="${rvm_prefix:-"$HOME/."}"
   fi
 fi
 
-if [[ -z "$rvm_path" ]] ; then rvm_path="${rvm_prefix}rvm" ; fi
+if [[ -z "${rvm_path:-""}" ]] ; then
+  rvm_path="${rvm_prefix}rvm"
+fi
 
 source scripts/initialize
 
 if grep -q 'scripts/rvm' "$HOME"/.bash* 2>/dev/null || grep -q 'scripts/rvm' "$HOME"/.zsh* 2>/dev/null; then
   if [[ -d "$rvm_path" ]] && [[ -s "${rvm_path}/scripts/rvm" ]] ; then
@@ -231,11 +235,11 @@
 
   printf "\nInstalling RVM to $rvm_path/"
 
 fi
 
-directories=( "${rvm_archives_path:-"$rvm_path/archives"}" "${rvm_src_path:-"$rvm_path/src"}" "${rvm_log_path:-"$rvm_path/log"}" "$rvm_bin_path" "${rvm_gems_path:-"$rvm_path/gems"}" "${rvm_rubies_path:-"$rvm_path/rubies"}" "$rvm_path/config" "${rvm_tmp_path:-"$rvm_path/tmp"}" )
+directories=( "${rvm_archives_path:-"$rvm_path/archives"}" "${rvm_src_path:-"$rvm_path/src"}" "${rvm_log_path:-"$rvm_path/log"}" "$rvm_bin_path" "${rvm_gems_path:-"$rvm_path/gems"}" "${rvm_rubies_path:-"$rvm_path/rubies"}" "$rvm_path/config" "${rvm_tmp_path:-"$rvm_path/tmp"}" "$rvm_path/bin" )
 
 for directory in "${directories[@]}" ; do
 
   if [[ ! -d "$directory" ]] ; then
 
@@ -301,15 +305,15 @@
 chmod +x "${rvm_bin_path:-"$rvm_path/bin"}"/* # TODO: this is quite suboptimal.
 
 #
 # RC Files
 #
-if [[ -n "$rvm_auto_flag" ]] ; then
+if [[ ${rvm_auto_flag:-0} -eq 1 ]] ; then
 
   printf "Checking rc files... ($rvm_rc_files)"
 
-  if [[ "$rvm_loaded_flag" != "1" ]] ; then
+  if [[ ${rvm_loaded_flag:-0} -ne 1 ]] ; then
 
     for rcfile in $(printf $rvm_rc_files) ; do
 
       if [[ ! -f $rcfile ]] ; then touch $rcfile ; fi
 
@@ -490,29 +494,23 @@
 fi
 
 #
 # End of gemset migration.
 #
+declare -a files
+
 printf "\n    Correct permissions for base binaries in $rvm_bin_path..."
 
 mkdir -p "${rvm_bin_path:-"$rvm_path/bin"}"
 
-for file in rvm rvmsudo rvm-shell rvm-auto-ruby ; do
+files=(rvm rvmsudo rvm-shell rvm-auto-ruby)
+for file in "${files[@]}" ; do
 
   [[ -s "${rvm_bin_path:-"$rvm_path/bin"}/$file" ]] && chmod +x "${rvm_bin_path:-"$rvm_path/bin"}/$file"
 
 done
 
-# Cleanup any .swp files that might have appeared.
-files=($( find "$rvm_path/" -mindepth 1 -maxdepth 2 -iname '*.swp' -type f ))
-
-for file in "${files[@]}" ; do
-
-  [[ -f "$file" ]] && rm -f "$file"
-
-done
-
 printf "\n    Copying manpages into place."
 
 files=($(builtin cd "$install_source_path/man" ; find . -maxdepth 1 -mindepth 1 -type f -print))
 
 for file in "${files[@]//.\/}" ; do
@@ -521,19 +519,37 @@
 
   cp -R "$install_source_path/man/$man_file" "$rvm_man_path/"
 
 done
 
-[[ "$upgrade_flag" = 0 ]] && ./scripts/notes
+files=($( find "$rvm_path/" -mindepth 1 -maxdepth 2 -iname '*.swp' -type f ))
 
+if [[ ${#files[@]} -gt 0 ]] ; then
+
+  printf "\n    Cleanup any .swp files."
+
+  for file in "${files[@]}" ; do
+
+    if [[ -f "$file" ]] ; then
+      rm -f "$file"
+    fi
+
+  done
+fi
+
+if [[ $upgrade_flag -eq 0 ]] ; then
+  chmod +x ./script/notes # Sometimes things don't clone properly :/
+  ./scripts/notes
+fi
+
 name="$(awk -F= '/^[[:space:]]*name/{print $2}' ~/.gitconfig 2>/dev/null)"
 
 if [[ ${upgrade_flag:-0} -eq 1 ]] ; then
 
   upgrade_notes
 
   check_rubyopt_conditions
-  
+
   regenerate_wrappers
 
   printf "\nUpgrade of RVM in $rvm_path/ is complete.\n\n"
 
 else