class Bundler::Runtime

def cache
  FileUtils.mkdir_p(cache_path) unless File.exists?(cache_path)
  Bundler.ui.info "Updating files in vendor/cache"
  specs.each do |spec|
    next if spec.name == 'bundler'
    spec.source.cache(spec) if spec.source.respond_to?(:cache)
  end
  Dir[cache_path.join("*/.git")].each do |git_dir|
    FileUtils.rm_rf(git_dir)
    FileUtils.touch(File.expand_path("../.bundlecache", git_dir))
  end
  prune_cache unless Bundler.settings[:no_prune]
end

def cache_path
  root.join("vendor/cache")
end

def clean(dry_run = false)
  gem_bins             = Dir["#{Gem.dir}/bin/*"]
  git_dirs             = Dir["#{Gem.dir}/bundler/gems/*"]
  git_cache_dirs       = Dir["#{Gem.dir}/cache/bundler/git/*"]
  gem_dirs             = Dir["#{Gem.dir}/gems/*"]
  gem_files            = Dir["#{Gem.dir}/cache/*.gem"]
  gemspec_files        = Dir["#{Gem.dir}/specifications/*.gemspec"]
  spec_gem_paths       = []
  # need to keep git sources around
  spec_git_paths       = @definition.sources.select {|s| s.is_a?(Bundler::Source::Git) }.map {|s| s.path.to_s }
  spec_git_cache_dirs  = []
  spec_gem_executables = []
  spec_cache_paths     = []
  spec_gemspec_paths   = []
  specs.each do |spec|
    spec_gem_paths << spec.full_gem_path
    # need to check here in case gems are nested like for the rails git repo
    md = %r{(.+bundler/gems/.+-[a-f0-9]{7,12})}.match(spec.full_gem_path)
    spec_git_paths << md[1] if md
    spec_gem_executables << spec.executables.collect do |executable|
      e = "#{Bundler.rubygems.gem_bindir}/#{executable}"
      [e, "#{e}.bat"]
    end
    spec_cache_paths << spec.cache_file
    spec_gemspec_paths << spec.spec_file
    spec_git_cache_dirs << spec.source.cache_path.to_s if spec.source.is_a?(Bundler::Source::Git)
  end
  spec_gem_paths.uniq!
  spec_gem_executables.flatten!
  stale_gem_bins       = gem_bins - spec_gem_executables
  stale_git_dirs       = git_dirs - spec_git_paths
  stale_git_cache_dirs = git_cache_dirs - spec_git_cache_dirs
  stale_gem_dirs       = gem_dirs - spec_gem_paths
  stale_gem_files      = gem_files - spec_cache_paths
  stale_gemspec_files  = gemspec_files - spec_gemspec_paths
  output = stale_gem_dirs.collect do |gem_dir|
    full_name = Pathname.new(gem_dir).basename.to_s
    parts   = full_name.split('-')
    name    = parts[0..-2].join('-')
    version = parts.last
    output  = "#{name} (#{version})"
    if dry_run
      Bundler.ui.info "Would have removed #{output}"
    else
      Bundler.ui.info "Removing #{output}"
      FileUtils.rm_rf(gem_dir)
    end
    output
  end + stale_git_dirs.collect do |gem_dir|
    full_name = Pathname.new(gem_dir).basename.to_s
    parts    = full_name.split('-')
    name     = parts[0..-2].join('-')
    revision = parts[-1]
    output   = "#{name} (#{revision})"
    if dry_run
      Bundler.ui.info "Would have removed #{output}"
    else
      Bundler.ui.info "Removing #{output}"
      FileUtils.rm_rf(gem_dir)
    end
    output
  end
  unless dry_run
    stale_gem_bins.each { |bin| FileUtils.rm(bin) if File.exists?(bin) }
    stale_gem_files.each { |file| FileUtils.rm(file) if File.exists?(file) }
    stale_gemspec_files.each { |file| FileUtils.rm(file) if File.exists?(file) }
    stale_git_cache_dirs.each { |dir| FileUtils.rm_rf(dir) if File.exists?(dir) }
  end
  output
end

def dependencies_for(*groups)
  if groups.empty?
    dependencies
  else
    dependencies.select { |d| (groups & d.groups).any? }
  end
end

def prune_cache
  FileUtils.mkdir_p(cache_path) unless File.exists?(cache_path)
  resolve = @definition.resolve
  prune_gem_cache(resolve)
  prune_git_and_path_cache(resolve)
end

def prune_gem_cache(resolve)
  cached  = Dir["#{cache_path}/*.gem"]
  cached = cached.delete_if do |path|
    spec = Bundler.rubygems.spec_from_gem path
    resolve.any? do |s|
      s.name == spec.name && s.version == spec.version && !s.source.is_a?(Bundler::Source::Git)
    end
  end
  if cached.any?
    Bundler.ui.info "Removing outdated .gem files from vendor/cache"
    cached.each do |path|
      Bundler.ui.info "  * #{File.basename(path)}"
      File.delete(path)
    end
  end
end

def prune_git_and_path_cache(resolve)
  cached  = Dir["#{cache_path}/*/.bundlecache"]
  cached = cached.delete_if do |path|
    name = File.basename(File.dirname(path))
    resolve.any? do |s|
      source = s.source
      source.respond_to?(:app_cache_dirname) && source.app_cache_dirname == name
    end
  end
  if cached.any?
    Bundler.ui.info "Removing outdated git and path gems from vendor/cache"
    cached.each do |path|
      path = File.dirname(path)
      Bundler.ui.info "  * #{File.basename(path)}"
      FileUtils.rm_rf(path)
    end
  end
end

def require(*groups)
  groups.map! { |g| g.to_sym }
  groups = [:default] if groups.empty?
  @definition.dependencies.each do |dep|
    # Skip the dependency if it is not in any of the requested
    # groups
    next unless ((dep.groups & groups).any? && dep.current_platform?)
    required_file = nil
    begin
      # Loop through all the specified autorequires for the
      # dependency. If there are none, use the dependency's name
      # as the autorequire.
      Array(dep.autorequire || dep.name).each do |file|
        # Allow `require: true` as an alias for `require: <name>`
        file = dep.name if file == true
        required_file = file
        Kernel.require file
      end
    rescue LoadError => e
      REGEXPS.find { |r| r =~ e.message }
      raise if dep.autorequire || $1 != required_file
      if dep.autorequire.nil? && dep.name.include?('-')
        begin
          namespaced_file = dep.name.gsub('-', '/')
          Kernel.require namespaced_file
        rescue LoadError
          REGEXPS.find { |r| r =~ e.message }
          regex_name = $1
          raise e if dep.autorequire || (regex_name && regex_name.gsub('-', '/') != namespaced_file)
          raise e if regex_name.nil?
        end
      end
    end
  end
end

def setup(*groups)
  groups.map! { |g| g.to_sym }
  # Has to happen first
  clean_load_path
  specs = groups.any? ? @definition.specs_for(groups) : requested_specs
  setup_environment
  Bundler.rubygems.replace_entrypoints(specs)
  # Activate the specs
  specs.each do |spec|
    unless spec.loaded_from
      raise GemNotFound, "#{spec.full_name} is missing. Run `bundle` to get it."
    end
    if activated_spec = Bundler.rubygems.loaded_specs(spec.name) and activated_spec.version != spec.version
      e = Gem::LoadError.new "You have already activated #{activated_spec.name} #{activated_spec.version}, " \
                             "but your Gemfile requires #{spec.name} #{spec.version}. Prepending " \
                             "`bundle exec` to your command may solve this."
      e.name = spec.name
      if e.respond_to?(:requirement=)
        e.requirement = Gem::Requirement.new(spec.version.to_s)
      else
        e.version_requirement = Gem::Requirement.new(spec.version.to_s)
      end
      raise e
    end
    Bundler.rubygems.mark_loaded(spec)
    load_paths = spec.load_paths.reject {|path| $LOAD_PATH.include?(path)}
    $LOAD_PATH.unshift(*load_paths)
  end
  setup_manpath
  lock
  self
end

def setup_environment
  begin
    ENV["BUNDLE_BIN_PATH"] = Bundler.rubygems.bin_path("bundler", "bundle", VERSION)
  rescue Gem::GemNotFoundException
    ENV["BUNDLE_BIN_PATH"] = File.expand_path("../../../bin/bundle", __FILE__)
  end
  # Set PATH
  paths = (ENV["PATH"] || "").split(File::PATH_SEPARATOR)
  paths.unshift "#{Bundler.bundle_path}/bin"
  ENV["PATH"] = paths.uniq.join(File::PATH_SEPARATOR)
  # Set BUNDLE_GEMFILE
  ENV["BUNDLE_GEMFILE"] = default_gemfile.to_s
  # Set RUBYOPT
  rubyopt = [ENV["RUBYOPT"]].compact
  if rubyopt.empty? || rubyopt.first !~ /-rbundler\/setup/
    rubyopt.unshift %|-rbundler/setup|
    ENV["RUBYOPT"] = rubyopt.join(' ')
  end
  # Set RUBYLIB
  rubylib = (ENV["RUBYLIB"] || "").split(File::PATH_SEPARATOR)
  rubylib.unshift File.expand_path('../..', __FILE__)
  ENV["RUBYLIB"] = rubylib.uniq.join(File::PATH_SEPARATOR)
end

def setup_manpath
  # Store original MANPATH for restoration later in with_clean_env()
  ENV['BUNDLE_ORIG_MANPATH'] = ENV['MANPATH']
  # Add man/ subdirectories from activated bundles to MANPATH for man(1)
  manuals = $LOAD_PATH.map do |path|
    man_subdir = path.sub(/lib$/, 'man')
    man_subdir unless Dir[man_subdir + '/man?/'].empty?
  end.compact
  unless manuals.empty?
    ENV['MANPATH'] = manuals.concat(
      ENV['MANPATH'].to_s.split(File::PATH_SEPARATOR)
    ).uniq.join(File::PATH_SEPARATOR)
  end
end