deploy-lrug.cgi

#!/usr/bin/env ruby

# This script should be installed at web webhook URL specified
# in .travis.yml

require "cgi"
require "json"
require 'fileutils'

cgi = CGI.new
params = JSON.parse(cgi.params['payload'].first) rescue nil
response = nil

if params.nil?
  response = "Failed to parse payload:\n\n#{cgi.params.inspect}"
else
  passed = params['state'] == 'success'
  on_default_branch = params['branch'] == 'main'

  if passed && on_default_branch
    TAR_URL = "https://github.com/lrug/lrug.org/releases/download/travis-release/lrug.org.tar.bz2"
    BASE_DIR = "/home/lrug/sites/lrug.org/www/lrug_middleman/"
    TMP_FILE = "/tmp/lrug.org.tar.bz2"

    NEW_RELEASE = File.join(BASE_DIR, "releases", Time.now.strftime('%Y%m%d%H%M%S'))
    OLDEST_RELEASE = Dir[File.join(BASE_DIR, "releases", "*")].sort.first
    CURRENT_SYMLINK = File.join(BASE_DIR, "current")

    # Download the archive
    `curl -L -o #{TMP_FILE} #{TAR_URL}`

    # Create the new release directory
    FileUtils.mkdir_p(NEW_RELEASE)

    # Extract the archive to the new release directory
    `tar xjvf #{TMP_FILE} -C #{NEW_RELEASE}`

    if $? == 0
      # Update the symlink
      `ln -fsn #{NEW_RELEASE} #{CURRENT_SYMLINK}`

      # Remove the oldest release
      FileUtils.rm_rf(OLDEST_RELEASE)

      response = "OK"
    else
      response = "Not deploying; tar exited with value #{$?}"
      puts "HTTP-Version: HTTP/1.0 500 Failed"
      puts
      puts response
      exit(0)
    end
  else
    response = "Not deploying; passed = #{passed.inspect}, branch = #{params['branch'].inspect}"
  end
end

puts "HTTP-Version: HTTP/1.0 200 OK"
puts
puts response

exit(0)