create julia image for specific virtual env

create_image.jl

#! /home/mdavezac/usr/src/julia-cb9bcae93a/bin/julia
packages = ["Gadfly", "IJulia", "ZMQ", "Winston", "Tk", "Cairo",
  "ProfileView", "ImageView"]

syspath = joinpath(expanduser("~"), ENV["VIRTUAL_ENV"], "share", "julia")
ispath(syspath) || mkdir(syspath)
isdir(syspath) || error(syspath, " is not a directory")

include(joinpath(JULIA_HOME, Base.DATAROOTDIR, "julia", "build_sysimg.jl"))
Pkg.update()
for package in packages
  Pkg.add(package)
end

path, io = mktemp()
try
  for package in packages
    println(io, "using ", package)
  end
  close(io)

  build_sysimg(joinpath(syspath, "image"), "native", path, force=true)
finally
  rm(path)
end