Homebrew formula to load Nginx listening on standard ports with convenient user-land configuration.

nginx.conf

user                  nobody;
worker_processes      1;

events {
  worker_connections  1024;
}

http {
  include             mime.types;
  default_type        application/octet-stream;
      
  gzip                on;
  sendfile            on;
  keepalive_timeout   65;

  # Magic userland configuration
  include             #{user_config_path};
}

nginx_daemon.rb

require 'formula'

class NginxPlist < GithubGistFormula
  url 'https://raw.github.com/gist/1613847/org.nginx.nginx.plist'
  md5 '4b6b72d33cef83829017f2e51a5b9471'
end

class NginxDaemon < GithubGistFormula
  homepage "https://gist.github.com/1587643"
  url "https://raw.github.com/gist/1613746/nginx.conf"
  md5 "8a5b17f45f01fa73af7a4ff7fbf282d5"

  depends_on 'nginx'
  
  keg_only "This formula only installs nginx configuration, there's nothing to symlink."

  def ld; Pathname.new("/Library/LaunchDaemons"); end
  def plist; "org.nginx.nginx.plist"; end
  def user_config_path; "/Users/*/.nginx/http/*.conf"; end
  def nginx_prefix; @nginx_prefix ||= Pathname.new(`brew --prefix nginx`.strip); end

  def install
    prefix.install 'nginx.conf'
    inreplace prefix+'nginx.conf', '#{user_config_path}', user_config_path
    (etc+'nginx').install prefix+'nginx.conf'

    NginxPlist.new.brew do |f|
      prefix.install plist
      inreplace prefix+plist, '#{HOMEBREW_PREFIX}', HOMEBREW_PREFIX
      system "sudo mkdir -p #{ld}"
      system "sudo cp #{prefix+plist} #{ld}"
      system "sudo launchctl unload -w #{ld+plist}"
    end

    begin
      safe_system "sudo nginx -t"
      system "sudo launchctl load -w #{ld+plist}"
      sleep 2
      system "sudo chmod 664 #{nginx_prefix+"logs/*.log"}" unless Dir.glob("#{nginx_prefix+"logs/*.log"}").empty?
      system "sudo chmod 775 #{nginx_prefix+"*_temp"}" unless Dir.glob("#{nginx_prefix+"*_temp"}").empty?
    rescue ErrorDuringExecution
      onoe "Nginx found a problem with its configuration."
      puts "Check the output of `#{Tty.blue}sudo nginx -t#{Tty.reset}' for errors."
      puts <<-INSTRUCTIONS.undent
        After you resolve them, run `#{Tty.blue}sudo launchctl load -w #{ld+plist}#{Tty.reset}'
        to install the system LaunchDaemon and then run both
        `#{Tty.blue}sudo chmod 664 #{nginx_prefix+"logs/*.log"}#{Tty.reset}' and
        `#{Tty.blue}sudo chmod 775 #{nginx_prefix+"*_temp"}#{Tty.reset}' to fix file permissions.
      INSTRUCTIONS
    end
  end

  def caveats
    return <<-FUN.undent
      #{Tty.white}Place app-specific nginx config files in #{Tty.blue}#{user_config_path.sub(%r{/\*/}, "/#{ENV['USER']}/")}#{Tty.white}
      and reload configuration with `#{Tty.blue}sudo nginx -s reload'#{Tty.reset}
    FUN
  end
end