my-boxen/script/boxen

#!/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'

    short_branch = current_branch.split('/')[2..-1].join('/')

    if !master
      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)
abort "Can't bootstrap, dependencies are outdated."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