install in rvm-0.0.61 vs install in rvm-0.0.62

@@ -1,18 +1,18 @@
 #!/bin/bash
 
 user="$(whoami)"
-if [ "root" = "$user" ] ; then
+if [[ "root" = "$user" ]] ; then
   echo -e "$(tput setaf 1) <e> root user support is not yet implemented.$(tput sgr0)"
   exit 1
 fi
 
 item="$(tput setaf 2)* $(tput sgr0)"
 question="\n$(tput setaf 2)<?>$(tput sgr0)"
 cwd=$(pwd)
 source_dir="${source_dir:-"$(dirname $0 | xargs dirname)"}"
-if [ ! -d "$source_dir" ] ; then unset source_dir ; fi
+if [[ ! -d "$source_dir" ]] ; then unset source_dir ; fi
 source_dir="${source_dir:-$cwd}"
 rvm_path=~/.rvm
 
 # State what is required to use rvm
 echo -e "\n$(tput setaf 2)rvm$(tput sgr0)\n\n    shell scripts that allows a user to manage multiple ruby versions in their own account."
@@ -30,87 +30,87 @@
 for file_name in rvm-prompt gemsync ; do
   mv $rvm_path/scripts/$file_name $rvm_path/bin/
   chmod +x $rvm_path/bin/$file_name
 done ; unset file_name
 
-if [ -z "$rvm_loaded_flag" ] ; then
+if [[ -z "$rvm_loaded_flag" ]] ; then
   for rcfile in .bash_profile .bashrc .zshrc ; do
-    if [ ! -e ~/$rcfile ] ; then touch ~/$rcfile ; fi
-    if [ -z "$(awk '/\.rvm\/scripts\/rvm/' ~/$rcfile)" ] ; then
-      echo "Adding 'if [ -s ~/.rvm/scripts/rvm ] ; then source ~/.rvm/scripts/rvm ; fi' to your ~/$rcfile."
-      echo -e "\n# rvm-install added line:\nif [ -s ~/.rvm/scripts/rvm ] ; then source ~/.rvm/scripts/rvm ; fi\n" >> ~/$rcfile
+    if [[ ! -e ~/$rcfile ]] ; then touch ~/$rcfile ; fi
+    if [[ -z "$(awk '/\.rvm\/scripts\/rvm/' ~/$rcfile)" ]] ; then
+      echo "Adding 'if [[ -s ~/.rvm/scripts/rvm ]] ; then source ~/.rvm/scripts/rvm ; fi' to your ~/$rcfile."
+      echo -e "\n# rvm-install added line:\nif [[ -s ~/.rvm/scripts/rvm ]] ; then source ~/.rvm/scripts/rvm ; fi\n" >> ~/$rcfile
     fi
   done
 fi
 
 echo -e "\n    Ensuring that rvm script location in $file is scripts/rvm not bin/rvm for: ~/.bash_profile, ~/.bashrc, ~/.zshrc..."
 for file in ~/.bash_profile ~/.bashrc ~/.zshrc ; do
-  if [ -s $file ] ; then
-    if [ -L $file ] ; then         # If the file is a symlink,
+  if [[ -s $file ]] ; then
+    if [[ -L $file ]] ; then         # If the file is a symlink,
       actual_file="$(readlink $file)" # read the link target so we can preserve it.
     else
       actual_file="$file"
     fi
 
     grep 'rvm\/bin\/rvm' $actual_file > /dev/null
-    if [ $? -eq 0 ] ; then
+    if [[ $? -eq 0 ]] ; then
       sed -i.orig 's#rvm/bin/rvm #rvm/scripts/rvm #g' $actual_file
       rm -f $actual_file.orig
     fi
 
-    if [ -f ~/.profile ] ; then
+    if [[ -f ~/.profile ]] ; then
       grep '.profile' $actual_file > /dev/null
-      if [ $? -gt 0 ] ; then
+      if [[ $? -gt 0 ]] ; then
         profile=~/.profile
         echo -e "\n" >> $actual_file
         echo "source $profile" >> $actual_file
       fi
     fi
   fi
 done
 
-if [ -f ~/.rvm/bin/rvm ] ; then
+if [[ -f ~/.rvm/bin/rvm ]] ; then
   echo -e "\n    Removing old rvm file from ~/.rvm/bin/rvm..."
   rm -f ~/.rvm/bin/rvm
 fi
 
 system="$(uname)"
 echo -e "\n    $(tput setaf 3)NOTES: $(tput sgr0)\n"
-if [ "Linux" = "$system" ] ; then
+if [[ "Linux" = "$system" ]] ; then
   rvm_apt_get_binary="$(which aptitude 2> /dev/null)"
   rvm_emerge_binary="$(which emerge 2> /dev/null)"
   rvm_pacman_binary="$(which pacman 2> /dev/null)"
   rvm_yum_binary="$(which yum 2> /dev/null)"
 
-  if [ ! -z "$rvm_apt_get_binary" ] ; then
+  if [[ ! -z "$rvm_apt_get_binary" ]] ; then
     echo -e "    $item For jRuby (if you wish to use it) you will need:"
     echo -e "       $ sudo aptitude install sun-java6-bin sun-java6-jre sun-java6-jdk"
     echo -e "    $item For ree (if you wish to use it) you will need:"
     echo -e "       $ sudo aptitude install libreadline5-dev libssl-dev bison"
 
-  elif [ ! -z "$rvm_emerge_binary" ] ; then
+  elif [[ ! -z "$rvm_emerge_binary" ]] ; then
     echo -e "    $item For jRuby (if you wish to use it) you will need:"
     echo -e "       $ sudo emerge dev-java/sun-jdk dev-java/sun-jre-bin"
 
-  elif [ ! -z "$rvm_pacman_binary" ] ; then
+  elif [[ ! -z "$rvm_pacman_binary" ]] ; then
     echo -e "    $item For jRuby (if you wish to use it) you will need:"
     echo -e "       $ sudo pacman -Sy jdk jre"
 
-  elif [ ! -z "$rvm_yum_binary" ] ; then
+  elif [[ ! -z "$rvm_yum_binary" ]] ; then
     echo -e "    $item For ree (if you wish to use it) you will need:"
     echo -e "       $ yum install -y rpm-build gcc gcc-c++ redhat-rpm-config ; then download and rpmbuild and install the sdk, Have fun..."
 
   else
     echo -e "    $item For jRuby (if you wish to use it) you will need:"
     echo -e "       The SUN java runtime environment and development kit."
   fi
-elif [ "Darwin" = "$system"  ] ; then
+elif [[ "Darwin" = "$system"  ]] ; then
   echo -e "      $item Be sure that you have XCode Tools installed in order to use rvm."
   echo -e "      $item If you intend on installing MacRuby you must install LLVM first."
 fi
 
 echo -e "      $item In order to use rvm the following line must occur in your shell's loading files, after all path/variable settings.:"
-echo -e "      $item if [ -s ~/.rvm/scripts/rvm ] ; then source ~/.rvm/scripts/rvm ; fi"
+echo -e "      $item if [[ -s ~/.rvm/scripts/rvm ]] ; then source ~/.rvm/scripts/rvm ; fi"
 echo -e "      $item CLOSE THIS SHELL AND OPEN A NEW ONE in order to use rvm."
 
 echo -e "\n    \033[0;33mRTFM: $(tput sgr0) http://rvm.beginrescueend.com/ \n"
 echo -e "$(tput setaf 2)w⦿‿⦿t!$(tput sgr0)"
 echo -e "\n    ~ Wayne\n"