Use erlang term format instead of ascii

Makefile

@@ -1,40 +1,21 @@
 # Apprentice binary
 
-CC = gcc
-CFLAGS = -std=c99 -g -Wall -Wextra -Werror
-LDFLAGS = -lm -lmagic
-HEADER_FILES = src
-C_SOURCE_FILES = src/apprentice.c
-OBJECT_FILES = $(C_SOURCE_FILES:.c=.o)
-EXECUTABLE_DIRECTORY = priv
-EXECUTABLE = $(EXECUTABLE_DIRECTORY)/apprentice
+ERL_EI_INCLUDE:=$(shell  erl -eval 'io:format("~s", [code:lib_dir(erl_interface, include)])' -s init stop -noshell | head -1)
+ERL_EI_LIB:=$(shell  erl -eval 'io:format("~s", [code:lib_dir(erl_interface, lib)])' -s init stop -noshell | head -1)
+CFLAGS = -std=c99 -g -Wall -Werror
+CPPFLAGS = -I$(ERL_EI_INCLUDE)
+LDFLAGS = -L$(ERL_EI_LIB)
+LDLIBS = -lpthread -lei -lm -lmagic
+PRIV = priv/
+RM = rm -Rf
 
-# Unit test custom magic file
+all: priv/apprentice
 
-MAGIC = file
-TEST_DIRECTORY = test
-TARGET_MAGIC = $(TEST_DIRECTORY)/elixir.mgc
-SOURCE_MAGIC = $(TEST_DIRECTORY)/elixir
-
-# Target
-
-all: $(EXECUTABLE) $(TARGET_MAGIC)
-
-# Compile
-
-$(EXECUTABLE): $(OBJECT_FILES) $(EXECUTABLE_DIRECTORY)
-	$(CC) $(OBJECT_FILES) -o $@ $(LDFLAGS)
-
-$(EXECUTABLE_DIRECTORY):
-	mkdir -p $(EXECUTABLE_DIRECTORY)
-
-.o:
-	$(CC) $(CFLAGS) $< -o $@
-
-# Test case
-
-$(TARGET_MAGIC): $(SOURCE_MAGIC)
-	cd $(TEST_DIRECTORY); $(MAGIC) -C -m elixir
+priv/apprentice: src/apprentice.c
+	mkdir -p priv
+	$(CC) $(CPPFLAGS) $(CFLAGS) $(LDFLAGS) $^ $(LDLIBS) -o $@
 
 clean:
-	rm -f $(EXECUTABLE) $(OBJECT_FILES) $(BEAM_FILES)
+	$(RM) $(PRIV)
+
+.PHONY: clean

lib/gen_magic/config.ex

@@ -5,19 +5,13 @@ defmodule GenMagic.Config do
   @startup_timeout 1_000
   @process_timeout 30_000
   @recycle_threshold :infinity
-  @database_patterns [:default]
 
   def get_port_name do
     {:spawn_executable, to_charlist(get_executable_name())}
   end
 
-  def get_port_options(options) do
-    arguments = [:use_stdio, :stderr_to_stdout, :binary, :exit_status]
-
-    case get_executable_arguments(options) do
-      [] -> arguments
-      list -> [{:args, list} | arguments]
-    end
+  def get_port_options(_options) do
+    [:use_stdio, :binary, :exit_status, {:packet, 2}]
   end
 
   def get_startup_timeout(options) do
@@ -36,13 +30,6 @@ defmodule GenMagic.Config do
     Path.join(:code.priv_dir(@otp_app), @executable_name)
   end
 
-  defp get_executable_arguments(options) do
-    Enum.flat_map(List.wrap(get(options, :database_patterns, @database_patterns)), fn
-      :default -> ["--database-default"]
-      pattern -> pattern |> Path.wildcard() |> Enum.flat_map(&["--database-file", &1])
-    end)
-  end
-
   defp get(options, key, default) do
     Keyword.get(options, key, default)
   end

lib/gen_magic/helpers.ex

@@ -5,7 +5,9 @@ defmodule GenMagic.Helpers do
 
   alias GenMagic.Result
   alias GenMagic.Server
-  @spec perform_once(Path.t(), [Server.option()]) :: {:ok, Result.t()} | {:error, term()}
+
+  @spec perform_once(Path.t() | {:bytes, binary}, [Server.option()]) ::
+          {:ok, Result.t()} | {:error, term()}
 
   @doc """
   Runs a one-shot process without supervision.