Vendor the external cookbooks

Knife-Zero doesn't include Berkshelf support, so vendoring everything in
the repo is convenient again

cookbooks/users/libraries/helpers.rb

@@ -0,0 +1,78 @@
+module Users
+  # Helpers for Users
+  module Helpers
+    # Checks fs type.
+    #
+    # @return [String]
+    def fs_type(mount)
+      # Doesn't support macosx
+      stat = Mixlib::ShellOut.new("stat -f -L -c %T #{mount} 2>&1").run_command
+      stat.stdout.chomp
+    rescue
+      'none'
+    end
+
+    # Determines if provided mount point is remote.
+    #
+    # @return [Boolean]
+    def fs_remote?(mount)
+      fs_type(mount) == 'nfs' ? true : false
+    end
+
+    def keys_from_url(url)
+      host = url.split('/')[0..2].join('/')
+      path = url.split('/')[3..-1].join('/')
+      begin
+        response = Chef::HTTP.new(host).get(path)
+        response.split("\n")
+      rescue Net::HTTPServerException => e
+        p "request: #{host}#{path}, error: #{e}"
+      end
+    end
+
+    # Determines if the user's shell is valid on the machine, otherwise
+    # returns the default of /bin/sh
+    #
+    # @return [String]
+    def shell_is_valid?(shell_path)
+      return false if shell_path.nil? || !File.exist?(shell_path)
+      # AIX is the only OS that has the concept of 'approved shells'
+      return true unless platform_family?('aix')
+
+      begin
+        File.open('/etc/security/login.cfg') do |f|
+          f.each_line do |l|
+            l.match(/^\s*shells\s*=\s*(.*)/) do |m|
+              return true if m[1].split(/\s*,\s*/).any? { |entry| entry.eql? shell_path }
+            end
+          end
+        end
+      rescue
+        return false
+      end
+
+      false
+    end
+
+    # Validates passed id.
+    #
+    # @return [Numeric, String]
+    # handles checking whether uid was specified as a string
+    def validate_id(id)
+      id.to_i.to_s == id ? id.to_i : id
+    end
+
+    # Returns the appropriate base user home directory per platform
+    #
+    # @return [ String]
+    def home_basedir
+      if platform_family?('mac_os_x')
+        '/Users'
+      elsif platform_family?('solaris2')
+        '/export/home'
+      else
+        '/home'
+      end
+    end
+  end
+end