Wrap an OS process in a GenServer so that it can be supervised.

For example, in your children list add MuonTrap.Daemon like this:

children = [
  {MuonTrap.Daemon, ["my_server", ["--options", "foo")], [cd: "/some_directory"]]}
]

opts = [strategy: :one_for_one, name: MyApplication.Supervisor]
Supervisor.start_link(children, opts)

In the child_spec tuple, the second element is a list that corresponds to the MuonTrap.cmd/3 parameters. I.e., The first item in the list is the program to run, the second is a list of commandline arguments, and the third is a list of options. The same options as MuonTrap.cmd/3 are available with the following additions:

• :name - Name the Daemon GenServer
• :log_output - When set, send output from the command to the Logger. Specify the log level (e.g., :debug)
• :log_prefix - Prefix each log message with this string (defaults to the program's path)
• :stderr_to_stdout - When set to true, redirect stderr to stdout. Defaults to false.

If you want to run multiple MuonTrap.Daemons under one supervisor, they'll all need unique IDs. Use Supervisor.child_spec/2 like this:

Supervisor.child_spec({MuonTrap.Daemon, ["my_server", []]}, id: :server1)