Somewhat hacky post-merge hook for rails bundle/migration updates

post-merge.rb

#!/usr/bin/env ruby

def is_mac?
	RUBY_PLATFORM.downcase.include?("darwin")
end

def getc_input
	# http://stackoverflow.com/a/174967/250407
	# http://bit.ly/PMZdKv
	begin
	  flag = is_mac? ? '-f' : '-F'
	  system("stty #{flag} /dev/tty raw -echo")
	  tty = open("/dev/tty", "r")
	  begin
	  	str = tty.getc
	  end while !(["Y","N"].include?(str.chr.upcase) || str == "\r") # yuck..
	ensure
	  system("stty #{flag} /dev/tty -raw echo")
	  tty.close
	end

	return str
end

# Fix RVM path problem from git subshell, puts "/usr/bin" at the end
ENV['PATH'] = ENV['PATH'].split(":").delete_if {|path| path == "/usr/bin" }.push("/usr/bin").join(":")

diff = `git diff --name-only HEAD@{1} HEAD`

if diff.index("db/migrate")
	print "\n\033[34mA new migration has been found! Do you want to run it?\033[0m [Yn]: "
	STDOUT.flush

	str = getc_input

	puts "" #newline

	unless str.chr.upcase == 'N'
		puts "\033[34mMigrating development and test DBs..\033[0m"
		puts "\033[34m  rake db:migrate...\033[0m\n"
		puts `bundle exec rake db:migrate`
		puts "\033[34m  rake db:test:prepare...\033[0m\n"
		puts `bundle exec rake db:test:prepare`
		puts "\033[34mDone!\033[0m"
	else
		puts "\033[34mSkipping migrations\033[0m"
	end
end

if diff.index("Gemfile")
	print "\n\033[34mA new bundle update has been found! Do you want to install it?\033[0m [Yn]: "
	STDOUT.flush

	str = getc_input

	puts "" #newline

	unless str.chr.upcase == 'N'
		puts "\033[34mUpdating bundles..\033[0m"
		puts `bundle install`
		puts "\033[34mDone!\033[0m"
	else
		puts "\033[34mSkipping bundle update\033[0m"
	end
end

Heads up you can make this a little more readable by doing something like this:

    def green(text)
       "\033[34m#{text}\033[0m"
    end

    puts green('Done!')