post-receive hook for automatic git deployments

post-receive.sh

#!/home/git/.rvm/rubies/ruby-2.3.0/bin/ruby

puts "Hello world!"

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

# 2. Only deploy if master branch was pushed
if (branch =~ /master$/) == nil
    puts "Received branch #{branch}, not deploying."
    exit
end

# 3. Copy files to deploy directory
deploy_to_dir = File.expand_path('/var/www/vhosts/api.server')
`GIT_WORK_TREE="#{deploy_to_dir}" git checkout -f master`
puts "DEPLOY: master(#{to}) copied to '#{deploy_to_dir}'"

# 4.TODO: Deployment Tasks
# i.e.: Run Puppet Apply, Restart Daemons, etc
puts "You're a STAR"

Idea: when pushing a branch that isn't master, change to this branch before deploying. Whatever you push becomes the live branch.