Script to install Vim 7.3 with ruby support for Mac OS X Lion

vim7.3_mac_install.rb

# requires root permissions in /usr/bin/

star = String.new
8.times { star += "*" }
Star = "\n#{star * 3}\n"

def newblock string
	puts "\n#{Star}#{string}#{Star}\n"
end

newblock "Prerequisites (iconv)"
if not system("which iconv")
	puts "You have to install `libiconv` (http://www.gnu.org/software/libiconv/), first."
	exit
end

newblock "Ensure that the right version of Ruby (1.8.7) is set"
if system('which rvm')
	if File.exists? ENV['HOME'] +"/.rvm/scripts/rvm"
		newblock "Load RVM into session *as a function*"
		`source "#{ENV['HOME'] +"/.rvm/scripts/rvm"}"`
	elsif File.exists?
		newblock "Load RVM into session *as a function* from a root install"
		`source "/usr/local/rvm/scripts/rvm"`
	else
		puts "ERROR: No RVM installation found.\n"
		exit
	end

	`rvm use system`
end

newblock "Move to `/tmp/`"
Dir.chdir("/tmp\/")
pwd = Dir.pwd

newblock "Curl & expand vim73 source"
system 'curl ftp://ftp.vim.org/pub/vim/unix/vim-7.3.tar.bz2 | tar -xz'

Dir.chdir"#{pwd}/vim73/"
newblock "Start configure"
system "./configure --enable-cscope --enable-pythoninterp --enable-rubyinterp --enable-perlinterp --enable-gui --enable-multibyte"

if `uname -m`.include? "x86_64"
	newblock "Your achitecture is x86_64. Set `config.mk` to handle this information."
	config = File.read("#{Dir.pwd}/src/auto/config.mk")
	r = config.gsub(/.*LDFLAGS.*/,"LDFLAGS = -L. -arch x86_64 -L/usr/local/lib")
	File.open("#{Dir.pwd}/src/auto/config.mk", "w") { |file| file.puts r }
end

newblock "Make"
system "make && make install"

newblock "Old Vim symlink moved to /usr/bin/vim.old"
system "sudo mv /usr/bin/vim /usr/bin/vim.old"
system "sudo ln -s /usr/local/bin/vim /usr/bin/vim"