Integrity git post-receive hook (Ruby 1.8)

push-to-integrity-post-receive

#!/usr/bin/env ruby

require 'rubygems'
require 'net/http'
require 'json'

# EDIT POST_RECEIVE_URL
POST_RECEIVE_URL = 'http://hostname:8910/repository-name/push'

old_head, new_head, ref = ARGV

revision_text = `git-rev-list --pretty=format:'Author: %an <%ae>%nDate: %cd%n%s%n' #{new_head} ^#{old_head}`
revisions = []
revision_text.split(/\n\n/).each { |commit|
  s = commit.split(/\n/)

  s[0] =~ /commit (\w+)/
  sha1 = $1
  s[1] =~ /Author: (.*) <(.+?)>/
  author_name, author_email = $1, $2
  s[2] =~ /Date: +(.+?) -0/
  timestamp = $1
  message = s[3].strip
  revisions << {
    'id' => sha1,
    'author' => {
      'email' => author_email,
      'name' => author_name,
    },
    'message' => message,
    'timestamp' => timestamp,
  }
}

if revisions.empty?
  exit 0
end

payload = {
  'payload' => {
    "ref" => ref,
    "commits" => revisions,
  }.to_json
}

if pid = fork
  Process.detach pid
else
  Net::HTTP.post_form( URI.parse( POST_RECEIVE_URL ), payload )
end