#!/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.
  
  unless ENV["BOXEN_NO_PULL"] || ARGV.include?("--no-pull")

    quietly = "> /dev/null 2>&1"
  
    if system("which git > /dev/null") && File.directory?(".git") \
      && fetch = 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 !master

        short_branch = if current_branch.empty?
          `git log -1 --pretty=format:%h`
        else
          current_branch.split('/')[2..-1].join('/')
        end

        warn "Boxen on a non-master branch '#{short_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  abort "Can't bootstrap, dependencies are outdated."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