class Bundler::PermissionError

def action
  case @permission_type
  when :read then "read from"
  when :write then "write to"
  when :executable, :exec then "execute"
  else @permission_type.to_s
  end
end

def initialize(path, permission_type = :write)
  @path = path
  @permission_type = permission_type
end

def message
  "There was an error while trying to #{action} `#{@path}`. " \
  "It is likely that you need to grant #{permission_type}."
end

def parent_folder
  File.dirname(@path)
end

def permission_type
  case @permission_type
  when :create
    "executable permissions for all parent directories and write permissions for `#{parent_folder}`"
  else
    "#{@permission_type} permissions for that path"
  end
end