有没有办法在julia-lang中构建包依赖树？

使用npm list将显示已安装的包,版本和关系的树：

虽然Julia包管理有所不同(例如,通常不存在包的重复副本),但有没有办法：

>知道为什么要安装一个包裹？
>或构建包依赖树.

我不认为有一个简单的功能,但这两个功能不应该太难：

julia> Pkg.dependents("Cairo")
10-element Array{AbstractString,1}:
 "Tk"
 "Gtk"
 "Mamba"
 "Drawing"
 "GtkUtilities"
 "ProfileView"
 "Brim"
 "Winston"
 "EcologicalNetwork"
 "VennEuler"

julia> Pkg.installed()
Dict{ASCIIString,VersionNumber} with 119 entries:
  "Libz"             => v"0.0.2"
  "Gtk"              => v"0.9.3"
  "Interact"         => v"0.3.0"
  "ForwardDiff"      => v"0.1.4"
  "Benchmark"        => v"0.1.0"
  "AxisAlgorithms"   => v"0.1.4"
  "Cairo"            => v"0.2.31+"
  "HttpParser"       => v"0.1.1"
  "DataFrames"       => v"0.6.10"
  "Requests"         => v"0.3.4"
  "QuartzImageIO"    => v"0.1.0+"
  "Markdown"         => v"0.3.0"
  "Requires"         => v"0.2.2"
  "ArgParse"         => v"0.3.0"
  ⋮                  => ⋮