#!/usr/bin/env ruby
# frozen_string_literal: true

#
# This file was generated by Bundler.
#
# The application 'bundle' is installed as part of a gem, and
# this file is here to facilitate running it.
#

require "rubygems"

m =
  Module.new do
    module_function

    def invoked_as_script?
      File.expand_path($PROGRAM_NAME) == File.expand_path(__FILE__)
    end

    def env_var_version
      ENV.fetch("BUNDLER_VERSION", nil)
    end

    def cli_arg_version
      return unless invoked_as_script? # don't want to hijack other binstubs
      return unless "update".start_with?(ARGV.first || " ") # must be running `bundle update`

      bundler_version = nil
      update_index = nil
      ARGV.each_with_index do |a, i|
        if update_index && update_index.succ == i &&
             a.match?(Gem::Version::ANCHORED_VERSION_PATTERN)
          bundler_version = a
        end
        unless a =~ /\A--bundler(?:[= ](#{Gem::Version::VERSION_PATTERN}))?\z/o
          next
        end

        bundler_version = Regexp.last_match(1)
        update_index = i
      end
      bundler_version
    end

    def gemfile
      gemfile = ENV.fetch("BUNDLE_GEMFILE", nil)
      return gemfile if gemfile && !gemfile.empty?

      File.expand_path("../Gemfile", __dir__)
    end

    def lockfile
      lockfile =
        case File.basename(gemfile)
        when "gems.rb"
          gemfile.sub(/\.rb$/, ".locked")
        else
          "#{gemfile}.lock"
        end
      File.expand_path(lockfile)
    end

    def lockfile_version
      return unless File.file?(lockfile)

      lockfile_contents = File.read(lockfile)
      unless lockfile_contents =~
               /\n\nBUNDLED WITH\n\s{2,}(#{Gem::Version::VERSION_PATTERN})\n/o
        return
      end

      Regexp.last_match(1)
    end

    def bundler_requirement
      @bundler_requirement ||=
        env_var_version || cli_arg_version ||
          bundler_requirement_for(lockfile_version)
    end

    def bundler_requirement_for(version)
      return "#{Gem::Requirement.default}.a" unless version

      bundler_gem_version = Gem::Version.new(version)

      bundler_gem_version.approximate_recommendation
    end

    def load_bundler!
      ENV["BUNDLE_GEMFILE"] ||= gemfile

      activate_bundler
    end

    def activate_bundler
      gem_error =
        activation_error_handling { gem "bundler", bundler_requirement }
      return if gem_error.nil?

      require_error = activation_error_handling { require "bundler/version" }
      if require_error.nil? &&
           Gem::Requirement.new(bundler_requirement).satisfied_by?(
             Gem::Version.new(Bundler::VERSION)
           )
        return
      end

      warn "Activating bundler (#{bundler_requirement}) failed:\n#{gem_error.message}\n\nTo install the version of bundler this project requires, run `gem install bundler -v '#{bundler_requirement}'`"
      exit 42
    end

    def activation_error_handling
      yield
      nil
    rescue StandardError, LoadError => e
      e
    end
  end

m.load_bundler!

load Gem.bin_path("bundler", "bundle") if m.invoked_as_script?