Git script to check changes to a file since last tagged release

git_changed_from_last_tag

#!/usr/bin/env ruby

require 'optparse'

tag_name = %x[git tag | tail -1].strip

optparse = OptionParser.new
optparse.parse!

filename = ARGV.pop

puts "\n"
puts "---------------------------------------\n"
puts "LAST RELEASE - \033[1;35m#{tag_name}\033[0m"

changes = %x[git ll #{tag_name}.. #{filename}]
num_of_changes = changes.lines.count

puts "#{num_of_changes} changes so far\n"
puts "---------------------------------------\n"

puts "#{changes}\n\n" if num_of_changes > 0

=begin

# my git alias for ll
[alias]
  ll   = !git log --color --graph --pretty=format:'%Cred%h%Creset -%C(yellow)%d%Creset %s %Cgreen(%cr) %C(bold blue)<%an>%Creset' --abbrev-commit

# I alias this script to gcheck. So i run the file like so:

$> gcheck  my/git/file/in/repo/SomeActivity.java

---------------------------------------
LAST RELEASE - android_release_X-X-X
1 changes so far
---------------------------------------
* qh51d30 - fix: random fix to test git script (18 hours ago) <Kaushik Gopal>

=end