More intelligently modify users .bashrc and .bash_profile

install.sh:
1. for those who have a /etc/profile.d
   then grep .bashrc for the sourcing of the autocomplete code
2. for those who use OSX
   grep .bash_profile to make sure .bashrc is sourced.

install.sh

@@ -19,9 +19,12 @@ function show_help {
         echo "sudo ./install.sh [--prefix /usr/local]"
 }
 
+# Default install directory.
 prefix=/usr
 
-#command line parsing
+#
+# Command line parsing
+#
 while true; do
     case "$1" in
       -h|--help|-\?) show_help; exit 0;;
@@ -39,33 +42,55 @@ done
 
 echo "Installing to ${prefix} ..."
 
+#
+# INSTALL AUTOJUMP
+#
 sudo mkdir -p ${prefix}/share/autojump/
 sudo cp icon.png ${prefix}/share/autojump/
 sudo cp jumpapplet ${prefix}/bin/
 sudo cp autojump ${prefix}/bin/
 sudo cp autojump.1 ${prefix}/share/man/man1/
+
+#
+# INSTALL BASH AUTOCOMPLETE
+#
+echo "Installing Autocompletion"
+
 if [ -d "/etc/profile.d" ]; then
+    # Copy the autocompletion code
     sudo cp autojump.bash /etc/profile.d/
     sudo cp autojump.sh /etc/profile.d/
+
+    # Make sure that the code we just copied has been sourced.
+    # check if .bashrc has sourced /etc/profile or /etc/profile.d/autojump.bash
+    if [ `grep -c "^[[:space:]]*source\|\. /etc/profile(\.d/autojump\.bash)[[:space:]]*$" ~/.bashrc` -eq 0 ]; then
+        echo "Your .bashrc doesn't seem to source /etc/profile or /etc/profile.d/autojump.bash"
+        echo "Adding the /etc/profile.d/autojump.bash to your .bashrc"
+        echo "" >> ~/.bashrc
+        echo "# Added by autojump install.sh" >> ~/.bashrc
+        echo "source /etc/profile.d/autojump.bash" >> ~/.bashrc
+    fi
     echo "Done!"
-    echo "Remember to add the line" 
-    echo "    source /etc/profile.d/autojump.bash"
-    echo "or"
-    echo "    source /etc/profile"
-    echo "to your ~/.bashrc if it's not there already"
-    # TODO intelligently source /etc/profile for them if the line isn't already in their .bashrc
 else
     echo "Your distribution does not have a /etc/profile.d directory, the default that we install one of the scripts to. Would you like us to copy it into your ~/.bashrc file to make it work? (If you have done this once before, delete the old version before doing it again.) [y/n]"
     read ans
     if [ ${#ans} -gt 0 ]; then
 	     if [ $ans = "y" -o $ans = "Y" -o $ans = "yes" -o $ans = "Yes" ]; then
+
+            # Answered yes. Go ahead and add the autojump bash autocompletion code
 	         echo "" >> ~/.bashrc
 	         echo "#autojump" >> ~/.bashrc
 	         cat autojump.bash >> ~/.bashrc
+
+            # Since OSX uses .bash_profile, we need to make sure that .bashrc is properly sourced.
+            # Makes the assumption that if they have a line: source ~/.bashrc or . ~/.bashrc, that
+            # .bashrc has been properly sourced and you don't need to add it.
             OS=`uname`
-            if [ $OS == 'Darwin' ]; then
+            if [ $OS == 'Darwin' -a `grep -c "^[[:space:]]*source\|\. ~/\.bashrc[[:space:]]*$" ~/.bash_profile` -eq 0 ]; then
+                echo "You are using OSX and your .bash_profile doesn't seem to be sourcing .bashrc"
+                echo "Adding source ~/.bashrc to your bashrc"
                 echo -e "\n# Get the aliases and functions" >> ~/.bash_profile
-               echo -e "\nif [ -f ~/.bashrc ]; then\n  . ~/.bashrc\nfi" >> ~/.bash_profile
+                echo -e "if [ -f ~/.bashrc ]; then\n  . ~/.bashrc\nfi" >> ~/.bash_profile
             fi
 	     else
 	         echo "Then you need to put autojump.sh, or the code from it, somewhere where it will get read. Good luck!"