#!/usr/bin/ruby
  # Run Boxen.
  
  require "pathname"
  
  if ENV["USER"] == "root"
    abort "Run this as a normal user, I'll sudo if I need to."
  end
  
  # Make sure only one boxen process runs at a time.
  
  myself = File.new __FILE__
  
  unless myself.flock File::LOCK_EX | File::LOCK_NB
    abort "You're already running a boxen process! Know a patience."
  end
  
  # Yeah yeah, I like to be explicit.
  
  at_exit { myself.flock File::LOCK_UN }
  
  # Put us where we belong, in the root dir of our boxen repo.
  
  Dir.chdir Pathname.new(__FILE__).realpath + "../.."
  
  # Auto-update code. This is done as early as possible so that changes
  # to boxen support code or dependencies can be grabbed.
  NO_PULL_ARGS = %w[--no-pull -h -? --help] + [/-service/]
  unless ENV["BOXEN_NO_PULL"] ||
    ARGV.any? { |arg|  NO_PULL_ARGS.any? { |no|  arg.match(no) } }
    quietly = "> /dev/null 2>&1"
  
    if system("which git > /dev/null") && File.directory?(".git") \
      && system("git fetch -q origin")
  
      clean  = `git status --porcelain`.empty?
      current_branch = `git symbolic-ref HEAD`.chomp
      master = current_branch == "refs/heads/master"
  
      upstream_changes = `git rev-list --count master..origin/master`.chomp != '0'
      fast_forwardable = `git rev-list --count origin/master..master`.chomp == '0'
  
      if current_branch.empty?
        ref = `git log -1 --pretty=format:%h`
        warn "Boxen not currently on any branch (ref: #{ref}), won't auto-update!"
      elsif !master
        local_branch =  current_branch.split('/')[2..-1].join('/')
        warn "Boxen on a non-master branch '#{local_branch}', won't auto-update!"
      elsif !fast_forwardable
        warn "Boxen's master branch is out of sync, won't auto-update!"
      elsif !clean
        warn "Boxen has a dirty tree, won't auto-update!"
      elsif !upstream_changes
        warn "Boxen is up-to-date."
      end
  
      if clean && master && fast_forwardable && upstream_changes
        reset   = "(git reset --hard origin/master #{quietly})"
        reclean = "(git clean -qdf)"
  
        unless system "#{reset} && #{reclean}"
          warn "Auto-update of Boxen FAILED, continuing."
        end
      end
    end
  end
  
  # Make sure our local dependencies are up to date.
  
  strap = %w(script/bootstrap --deployment --local --without development:test --no-cache)
  abort "Can't bootstrap, dependencies are outdated." unless system *strap
  
  # Set up our local configuration, deps, and load path.
  
  load "config/basic.rb"
  require "boxen/cli"
  
  # Okay, let's run this thing.
  
  exit Boxen::CLI.run ARGV