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Development tooling for the Mob mobile framework
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lib/mix/tasks/mob.push.ex
defmodule Mix.Tasks.Mob.Push do
use Mix.Task
@shortdoc "Compile and hot-push changed modules to running mob devices"
@moduledoc """
Compiles the project and hot-pushes updated BEAM modules to all running
Android and iOS devices — no app restart.
The apps must already be running (start them with `mix mob.connect` or
`mix mob.deploy` first). Modules are loaded into the live BEAM in place,
equivalent to calling `nl(Module)` in IEx for each changed module.
Options:
--all Push all modules, not just those changed since last compile
--cookie Erlang cookie (default: mob_secret)
Examples:
mix mob.push
mix mob.push --all
mix mob.push --cookie my_cookie
## Under the hood
`mix mob.push` is a scripted version of the IEx hot-code-push workflow:
mix compile
# For each changed module, on each connected node:
nl(MyApp.SomeScreen)
# which calls:
:rpc.call(node, :code, :load_binary, [MyApp.SomeScreen, path, beam_binary])
The `nl/1` built-in in IEx does the same thing for a single module. `mix mob.push`
does it for all changed modules across all connected nodes in one shot.
"""
@impl Mix.Task
def run(args) do
{opts, _, _} = OptionParser.parse(args,
switches: [all: :boolean, cookie: :string],
aliases: [c: :cookie]
)
push_all = Keyword.get(opts, :all, false)
cookie = opts |> Keyword.get(:cookie, "mob_secret") |> String.to_atom()
IO.puts("")
snapshot = MobDev.HotPush.snapshot_beams()
Mix.Task.run("compile")
IO.puts("\n#{IO.ANSI.cyan()}Connecting to devices...#{IO.ANSI.reset()}")
nodes = MobDev.HotPush.connect(cookie: cookie)
if nodes == [] do
IO.puts("#{IO.ANSI.yellow()}No running nodes found.#{IO.ANSI.reset()}")
IO.puts("Start apps first: mix mob.connect")
else
IO.puts(" Connected: #{Enum.map_join(nodes, ", ", &to_string/1)}")
IO.puts("#{IO.ANSI.cyan()}Pushing modules...#{IO.ANSI.reset()}")
{pushed, failed} =
if push_all,
do: MobDev.HotPush.push_all(nodes),
else: MobDev.HotPush.push_changed(nodes, snapshot)
if pushed == 0 and failed == [] do
IO.puts(" #{IO.ANSI.yellow()}Nothing changed.#{IO.ANSI.reset()}")
else
if pushed > 0 do
IO.puts(" #{IO.ANSI.green()}✓ #{pushed} module(s) pushed#{IO.ANSI.reset()}")
end
Enum.each(failed, fn {mod, reason} ->
IO.puts(" #{IO.ANSI.red()}✗ #{mod}: #{inspect(reason)}#{IO.ANSI.reset()}")
end)
end
end
end
end