#!/usr/bin/env ruby

# Rbenv shims and the bundler/inline feature don't work quite well, at least in Ruby 2.5.0.
#
# The reasons is that Wagon rbenv shim activates all the gems of the Wagon gem.
# When activating them, it might load versions of the gems different from
# the ones specified by the gemfile statement.
#
# Hopefully, it just activates meaning it doesn't load them.
# So the solution is simple: reset both the Gem loaded specs and the $LOAD_PATH variable.
def reset_gem_specs!
  return unless Gem.loaded_specs.keys.include?('locomotivecms_wagon')

  core_gems = %w(did_you_mean).freeze

  Gem.loaded_specs.values.each do |spec|
    next if core_gems.include?(spec.name)
    spec.full_require_paths.each do |path|
      $LOAD_PATH.delete(path)
    end

    # Without this statement, bundler will raise the infamous "You have already activated ..."
    Gem.loaded_specs.delete(spec.name)
  end
end

if ENV["BUNDLE_BIN_PATH"]
  # Wagon is launched within the Bundler context (basically with bundle exec wagon),
  # do nothing since Bundler already took take care of loading the right gems.
  ENV['WAGON_GEMFILE'] = '1'
elsif ENV['WAGON_GEMFILE']
  reset_gem_specs!

  # For LocomotiveCMS developers who want to run a local version of Wagon
  # with gems like Steam, Coal and Common pointing to the local sources
  puts "!!!WARNING!!! Using Wagon described in the following Gemfile: #{ENV['WAGON_GEMFILE']}"

  ENV['BUNDLE_GEMFILE'] ||= ENV['WAGON_GEMFILE']

  require 'bundler'
  Bundler.require
else
  reset_gem_specs!

  # Almost of all the users will rely on the gems described in
  # the gemspec of the current Wagon version.
  require 'bundler/inline'

  gemfile do
    source 'https://rubygems.org'

    gemspec path: File.dirname(__FILE__) + '/..'

    # Mac OS X
    gem 'rb-fsevent', '~> 0.10.3', require: 'rb-fsevent' if RUBY_PLATFORM.include?('darwin')

    # Unix
    gem 'therubyracer', require: 'v8', platforms: :ruby unless RUBY_PLATFORM.include?('darwin')

    gem 'rb-inotify', '~> 0.10.0', require: 'rb-inotify' if RUBY_PLATFORM.include?('linux')

    # Windows
    gem 'wdm', '~> 0.1.1', require: 'wdm' if RUBY_PLATFORM =~ /mswin|mingw/i
  end
end

$stdout.sync = true

require 'locomotive/wagon'
require 'locomotive/wagon/cli'

# Let the magin happens
Locomotive::Wagon::CLI::Main.start