Pre-receive git hook for chef versions

pre-receive

#!/opt/gitlab/embedded/bin/ruby
# pre-receive

def header
  puts "##########################"
end

def error msg
  header
  puts "Can't accept your commit !"
  puts msg
  header
end

# 1. Read STDIN (Format: "from_commit to_commit branch_name")
from, to, branch = ARGF.read.split " "

puts from, to, branch

# 2. Only deploy if master branch was pushed
if (branch =~ /master$/) 
    puts "Received branch #{branch}, deploying ..."
    puts "Check cookbook version" 
    old_ver =  `git show #{from}:metadata.rb |grep version`
    new_ver =  `git show #{to}:metadata.rb |grep version`
    puts "OLD VER #{old_ver} -> "
    puts "NEW VER #{new_ver}"
    _old_ver = old_ver.split()
    ver_orig=  _old_ver[1][1...-1].split('.').join().to_i
    _new_ver = new_ver.split()
    ver_new =  _new_ver[1][1...-1].split('.').join().to_i

    unless ver_new > ver_orig
      puts error "New version #{ver_new} is not bigger than old version #{ver_orig} "
      exit 1
    end
    exit
end

# http://stackoverflow.com/questions/610208/how-to-retrieve-a-single-file-from-specific-revision-in-git


# 
require "pp"
require "json"
require "net/http"

# last_log = `git log -1 --oneline`
# last_commit = last_log.split()[0]
# f = `git show #{last_commit}:cookbooks/u_nginx/metadata.rb|grep version`
# ver = f.split()[1]
# puts ver[1...-1].split('.').join().to_i


def _get_url(url)
  resp = Net::HTTP.get_response(URI.parse(url))
  return resp.body
end


def get_snc_change(chg)
  url = "http://test/?format=JSONV2&chg=#{chg}"
  return JSON.parse(_get_url(url))
end


# https://developer.yahoo.com/ruby/ruby-json.html