deactivate YCM if it's not usable

install.sh

@@ -8,6 +8,7 @@ main() {
 	cd $DIR
     if [[ $1 == "--ycm" ]]; then
 		rm .youcompletemesetup
+		vim +BundleInstall +qall
 		setup_youcompleteme
 		exit 0
 	else
@@ -40,6 +41,9 @@ install_everything() {
 
 	echo "setting up git files..."
 	symlink_files git-files gitconfig
+
+	create_local_bin
+	setup_local_symlinks
 }
 
 setup_gitmodules() {
@@ -54,12 +58,12 @@ symlink_files() {
 
 	for filename in $filenames
 	do
-		if [ -f $home/.${filename} ] || [ -l $home/.$filename ]; then
+		if [ -e $HOME/.${filename} ]; then
 			echo "moving old .$filename to .${filename}.bak"
-			mv $home/.$filename $home/.${filename}.bak
+			mv $HOME/.$filename $HOME/.${filename}.bak
 		fi
-		echo "linking $dir/$source_dir/$filename $home/.$filename"
+		echo "linking $DIR/$source_dir/$filename $HOME/.$filename"
-		ln -s "$dir/$source_dir/$filename" "$home/.$filename"
+		ln -s "$DIR/$source_dir/$filename" "$HOME/.$filename"
 	done
 }
 
@@ -76,4 +80,27 @@ setup_youcompleteme() {
 	fi
 }
 
+create_local_bin() {
+	(cd ~/local) || mkdir ~/local
+	(cd ~/local/bin) || mkdir ~/local/bin
+}
+
+setup_local_symlinks() {
+	setup_vim_symlink
+}
+
+setup_vim_symlink() {
+	vim_version=`vim --version | head -1 | cut -d " " -f 5`
+	if [[ $(echo "$vim_version >= 7.4" | bc) = 1 ]]; then
+		ln -s `which vim` ~/local/bin/vim
+	else
+		if [ -d $DIR/vim-files/vim/bundle/YouCompleteMe ]; then
+			echo "Your version of vim is too old to use YCM -- removing the YCM bundle..."
+			echo "rerun this installer with the --ycm option once vim is >= 7.4"
+			echo "your new shellrc files will look for 'vim' in ~/local/bin, but this has not been setup for you."
+			rm -rf $DIR/vim-files/vim/bundle/YouCompleteMe
+		fi
+	fi
+}
+
 main $@