Extract binary dependencies (dynamic libraries) for crystal compiled program

dependencies.cr

executable = "bin/critter"

deps = [] of String
output = `ldd #{executable}`.scan(/(\/.*)\s\(/) do |m|
  library = m[1]
  deps << library

  real_lib = File.real_path(library)
  deps << real_lib if real_lib != library
end

deps.each do |dep|
  `cp -v #{dep} deps/`
end