Ruby Git post-receive hook to parse out the stdin and assign them to variables

post-receive.rb

#!/usr/bin/env ruby

# figure out which repository this is
# assumes it's a bare repository
repository = /([^\/]*?)\.git$/.match(`pwd`.chomp)[1]

# get the stdins from git
stdins = []; stdins << $_ while gets

stdins.each do |str|
  # parse the stdin string
  arr = str.split
  refs = arr[2].split('/')
  
  # what we're really after
  oldrev   = arr[0] # SHA
  newrev   = arr[1] # SHA
  ref_type = refs[1] # tags || heads (branch)
  ref_name = refs[2] # develop, 1.4 etc.
  
  # now do whatcha gotta do
end

Thanks for this! It helped me create an integration with Pivotal Tracker: https://gist.github.com/895521