Format code using Elixir's formatter

.formatter.exs

@@ -0,0 +1,3 @@
+[
+  inputs: ["mix.exs", "{lib,test}/**/*.{ex, exs}"]
+]

lib/mix/tasks/portmidi.devices.ex

@@ -3,19 +3,19 @@ defmodule Mix.Tasks.Portmidi.Devices do
   @shortdoc "Shows the connected devices"
 
   def run(_args) do
-    IO.puts "Input:"
+    IO.puts("Input:")
     list_devices(:input)
 
-    IO.puts "Output:"
+    IO.puts("Output:")
     list_devices(:output)
   end
 
   defp list_devices(type) do
-    PortMidi.devices[type]
+    PortMidi.devices()[type]
     |> Enum.each(&print_device/1)
   end
 
   defp print_device(device) do
-    IO.puts " - #{device.name}"
+    IO.puts(" - #{device.name}")
   end
 end

lib/portmidi.ex

@@ -38,7 +38,7 @@ defmodule PortMidi do
   """
   @spec open(:input, <<>>) :: {:ok, pid()} | {:error, atom()}
   def open(:input, device_name) do
-    Input.start_link device_name
+    Input.start_link(device_name)
   end
 
   @doc """
@@ -63,7 +63,7 @@ defmodule PortMidi do
   """
   @spec close(atom, pid()) :: :ok
   def close(device_type, device)
-  def close(:input, input),   do: Input.stop(input)
+  def close(:input, input), do: Input.stop(input)
   def close(:output, output), do: Input.stop(output)
 
   @doc """
@@ -72,8 +72,7 @@ defmodule PortMidi do
     events in its mailbox as soon as they are emitted from the device.
   """
   @spec listen(pid(), pid()) :: :ok
-  def listen(input, pid), do:
-    Input.listen(input, pid)
+  def listen(input, pid), do: Input.listen(input, pid)
 
   @doc """
     Writes a MIDI event to the given `output` device. `message` can be a tuple
@@ -86,13 +85,12 @@ defmodule PortMidi do
   @spec write(pid(), message) :: :ok
   @spec write(pid(), {message, timestamp}) :: :ok
   @spec write(pid(), [{message, timestamp}, ...]) :: :ok
-  def write(output, message), do:
-    Output.write(output, message)
+  def write(output, message), do: Output.write(output, message)
 
   @doc """
     Returns a map with input and output devices, in the form of
     `PortMidi.Device` structs
   """
   @spec devices() :: %{input: [%PortMidi.Device{}, ...], output: [%PortMidi.Device{}, ...]}
-  def devices, do: Devices.list
+  def devices, do: Devices.list()
 end

lib/portmidi/device.ex

@@ -8,7 +8,5 @@ defmodule PortMidi.Device do
     |> make_struct()
   end
 
-  defp make_struct(map), do:
-    struct(__MODULE__, map)
+  defp make_struct(map), do: struct(__MODULE__, map)
 end
-

lib/portmidi/devices.ex

@@ -1,13 +1,12 @@
 defmodule PortMidi.Devices do
   import PortMidi.Nifs.Devices
-  alias  PortMidi.Device
+  alias PortMidi.Device
 
   def list do
     do_list()
-    |> Map.update(:input,  [], &do_build_devices/1)
+    |> Map.update(:input, [], &do_build_devices/1)
     |> Map.update(:output, [], &do_build_devices/1)
   end
 
-  defp do_build_devices(devices), do:
-    Enum.map(devices, &Device.build/1)
+  defp do_build_devices(devices), do: Enum.map(devices, &Device.build/1)
 end

lib/portmidi/input.ex

@@ -3,7 +3,7 @@ defmodule PortMidi.Input do
   alias PortMidi.Listeners
 
   def start_link(device_name) do
-    Server.start_link device_name
+    Server.start_link(device_name)
   end
 
   def listen(input, pid) do
@@ -14,4 +14,3 @@ defmodule PortMidi.Input do
     Server.stop(input)
   end
 end
-

lib/portmidi/input/reader.ex

@@ -5,36 +5,35 @@ defmodule PortMidi.Input.Reader do
   @buffer_size Application.get_env(:portmidi, :buffer_size, 256)
 
   def start_link(server, device_name) do
-    Agent.start_link fn -> start(server, device_name) end
+    Agent.start_link(fn -> start(server, device_name) end)
   end
 
   # Client implementation
   #######################
 
-  def listen(agent), do:
-    Agent.get_and_update agent, &do_listen/1
+  def listen(agent), do: Agent.get_and_update(agent, &do_listen/1)
 
   def stop(agent) do
-    Agent.get agent, &do_stop/1
+    Agent.get(agent, &do_stop/1)
     Agent.stop(agent)
   end
 
   # Agent implementation
   ######################
   defp start(server, device_name) do
-    case device_name |> String.to_char_list |> do_open do
-      {:ok,    stream} -> {server, stream}
+    case device_name |> String.to_char_list() |> do_open do
+      {:ok, stream} -> {server, stream}
       {:error, reason} -> exit(reason)
     end
   end
 
   defp do_listen({server, stream}) do
-    task = Task.async fn -> loop(server, stream) end
+    task = Task.async(fn -> loop(server, stream) end)
     {:ok, {server, stream, task}}
   end
 
   defp loop(server, stream) do
-    if do_poll(stream) == :read, do: read_and_send(server,stream)
+    if do_poll(stream) == :read, do: read_and_send(server, stream)
     loop(server, stream)
   end
 
@@ -44,7 +43,7 @@ defmodule PortMidi.Input.Reader do
   end
 
   defp do_stop({_server, stream, task}) do
-    task   |> Task.shutdown
+    task |> Task.shutdown()
     stream |> do_close
   end
 end

lib/portmidi/input/server.ex

@@ -9,11 +9,9 @@ defmodule PortMidi.Input.Server do
   # Client implementation
   #######################
 
-  def new_messages(server, messages), do:
-    GenServer.cast(server, {:new_messages, messages})
+  def new_messages(server, messages), do: GenServer.cast(server, {:new_messages, messages})
 
-  def stop(server), do:
-    GenServer.stop(server)
+  def stop(server), do: GenServer.stop(server)
 
   # Server implementation
   #######################
@@ -25,20 +23,19 @@ defmodule PortMidi.Input.Server do
       {:ok, reader} ->
         Reader.listen(reader)
         {:ok, reader}
+
       {:error, reason} ->
         {:stop, reason}
     end
   end
 
   def handle_cast({:new_messages, messages}, reader) do
     self()
-    |> Listeners.list
-    |> Enum.each(&(send(&1, {self(), messages})))
+    |> Listeners.list()
+    |> Enum.each(&send(&1, {self(), messages}))
 
     {:noreply, reader}
   end
 
-  def terminate(_reason, reader), do:
-    reader |> Reader.stop
-
+  def terminate(_reason, reader), do: reader |> Reader.stop()
 end

lib/portmidi/listeners.ex

@@ -6,17 +6,14 @@ defmodule PortMidi.Listeners do
   # Client implementation
   #######################
 
-  def register(input, pid), do:
-    GenServer.cast(__MODULE__, {:register, input, pid})
+  def register(input, pid), do: GenServer.cast(__MODULE__, {:register, input, pid})
 
-  def list(input), do:
-    GenServer.call(__MODULE__, {:list, input})
+  def list(input), do: GenServer.call(__MODULE__, {:list, input})
 
   # Server implementation
   #######################
 
-  def init(:ok), do:
-    {:ok, {%{}, %{}}}
+  def init(:ok), do: {:ok, {%{}, %{}}}
 
   def handle_call({:list, input}, _from, {listeners, _} = state) do
     if Map.has_key?(listeners, input) do
@@ -43,19 +40,17 @@ defmodule PortMidi.Listeners do
     {:noreply, {listeners, refs}}
   end
 
-  def handle_info(_msg, state), do:
-    {:noreply, state}
+  def handle_info(_msg, state), do: {:noreply, state}
 
   require Logger
-  def terminate(reason, _), do:
-    Logger.error(reason)
+  def terminate(reason, _), do: Logger.error(reason)
 
   # Private implementation
   ########################
 
   def do_update_listeners(listeners, pid) do
-    Enum.reduce(listeners, %{}, fn({input, listeners}, acc) ->
-      Map.put acc, input, do_find_new_listeners(listeners, pid)
+    Enum.reduce(listeners, %{}, fn {input, listeners}, acc ->
+      Map.put(acc, input, do_find_new_listeners(listeners, pid))
     end)
   end
 

lib/portmidi/nifs/devices.ex

@@ -2,11 +2,10 @@ defmodule PortMidi.Nifs.Devices do
   @on_load :init
   def init do
     :portmidi
-    |> :code.priv_dir
+    |> :code.priv_dir()
     |> :filename.join("portmidi_devices")
     |> :erlang.load_nif(0)
   end
 
-  def do_list, do:
-    raise "NIF library not loaded"
+  def do_list, do: raise("NIF library not loaded")
 end

lib/portmidi/nifs/input.ex

@@ -1,21 +1,18 @@
 defmodule PortMidi.Nifs.Input do
   @on_load {:init, 0}
   def init do
-    :ok = :portmidi
-    |> :code.priv_dir
-    |> :filename.join("portmidi_in")
-    |> :erlang.load_nif(0)
+    :ok =
+      :portmidi
+      |> :code.priv_dir()
+      |> :filename.join("portmidi_in")
+      |> :erlang.load_nif(0)
   end
 
-  def do_poll(_stream), do:
-    raise "NIF library not loaded"
+  def do_poll(_stream), do: raise("NIF library not loaded")
 
-  def do_read(_stream, _buffer_size), do:
-    raise "NIF library not loaded"
+  def do_read(_stream, _buffer_size), do: raise("NIF library not loaded")
 
-  def do_open(_device_name), do:
-    raise "NIF library not loaded"
+  def do_open(_device_name), do: raise("NIF library not loaded")
 
-  def do_close(_stream), do:
-    raise "NIF library not loaded"
+  def do_close(_stream), do: raise("NIF library not loaded")
 end

lib/portmidi/nifs/output.ex

@@ -2,18 +2,16 @@ defmodule PortMidi.Nifs.Output do
   @on_load {:init, 0}
 
   def init do
-    :ok = :portmidi
-    |> :code.priv_dir
-    |> :filename.join("portmidi_out")
-    |> :erlang.load_nif(0)
+    :ok =
+      :portmidi
+      |> :code.priv_dir()
+      |> :filename.join("portmidi_out")
+      |> :erlang.load_nif(0)
   end
 
-  def do_open(_device_name, _latency), do:
-    raise "NIF library not loaded"
+  def do_open(_device_name, _latency), do: raise("NIF library not loaded")
 
-  def do_write(_stream, _message), do:
-    raise "NIF library not loaded"
+  def do_write(_stream, _message), do: raise("NIF library not loaded")
 
-  def do_close(_stream), do:
-    raise "NIF library not loaded"
+  def do_close(_stream), do: raise("NIF library not loaded")
 end

lib/portmidi/output.ex

@@ -5,23 +5,19 @@ defmodule PortMidi.Output do
     GenServer.start_link(__MODULE__, {device_name, latency})
   end
 
-
   # Client implementation
   #######################
-  def write(server, message), do:
-    GenServer.call(server, {:write, message})
-
-  def stop(server), do:
-    GenServer.stop(server)
+  def write(server, message), do: GenServer.call(server, {:write, message})
 
+  def stop(server), do: GenServer.stop(server)
 
   # Server implementation
   #######################
   def init({device_name, latency}) do
     Process.flag(:trap_exit, true)
 
     case do_open(to_charlist(device_name), latency) do
-      {:ok,    stream} -> {:ok,   stream}
+      {:ok, stream} -> {:ok, stream}
       {:error, reason} -> {:stop, reason}
     end
   end

mix.exs

@@ -3,48 +3,56 @@ defmodule PortMidi.Mixfile do
   @version "5.1.2"
 
   def project do
-    [app: :portmidi,
-     version: @version,
-     elixir: "~> 1.2",
-     description: "Elixir bindings to the portmidi C library",
-     package: package(),
-     compilers: [:port_midi, :elixir, :app],
-     build_embedded: Mix.env == :prod,
-     start_permanent: Mix.env == :prod,
-     deps: deps(),
+    [
+      app: :portmidi,
+      version: @version,
+      elixir: "~> 1.2",
+      description: "Elixir bindings to the portmidi C library",
+      package: package(),
+      compilers: [:port_midi, :elixir, :app],
+      build_embedded: Mix.env() == :prod,
+      start_permanent: Mix.env() == :prod,
+      deps: deps(),
 
-     # Docs
-     name: "PortMidi",
-     docs: [source_ref: "v#{@version}", main: "PortMidi",
-            source_url: "https://github.com/lucidstack/ex-portmidi"]
-   ]
+      # Docs
+      name: "PortMidi",
+      docs: [
+        source_ref: "v#{@version}",
+        main: "PortMidi",
+        source_url: "https://github.com/lucidstack/ex-portmidi"
+      ]
+    ]
   end
 
   def application do
-    [applications: [:logger],
-     mod: {PortMidi, []}]
+    [applications: [:logger], mod: {PortMidi, []}]
   end
 
   defp deps do
-    [{:credo, "~> 0.5.3", only: [:dev, :test]},
-     {:mock, "~> 0.1.1", only: :test},
-     {:ex_doc, github: "elixir-lang/ex_doc", only: :dev},
-     {:earmark, ">= 0.0.0", only: :dev}]
+    [
+      {:credo, "~> 0.5.3", only: [:dev, :test]},
+      {:mock, "~> 0.1.1", only: :test},
+      {:ex_doc, github: "elixir-lang/ex_doc", only: :dev},
+      {:earmark, ">= 0.0.0", only: :dev}
+    ]
   end
 
   defp package do
-    [maintainers: ["Andrea Rossi"],
-     files: ["priv", "lib", "src", "Makefile", "mix.exs", "README.md", "LICENSE"],
-     licenses: ["MIT"],
-     links: %{"Github" => "https://github.com/lucidstack/ex-portmidi"}]
+    [
+      maintainers: ["Andrea Rossi"],
+      files: ["priv", "lib", "src", "Makefile", "mix.exs", "README.md", "LICENSE"],
+      licenses: ["MIT"],
+      links: %{"Github" => "https://github.com/lucidstack/ex-portmidi"}
+    ]
   end
 end
 
 defmodule Mix.Tasks.Compile.PortMidi do
   @moduledoc "Compiles portmidi bindings"
   def run(_) do
-    if Mix.shell.cmd("make") != 0 do
-      raise Mix.Error, message: "could not run `make`. Do you have make, gcc and libportmidi installed?"
+    if Mix.shell().cmd("make") != 0 do
+      raise Mix.Error,
+        message: "could not run `make`. Do you have make, gcc and libportmidi installed?"
     end
 
     :ok