refactor

lib/then.ex

@@ -11,13 +11,19 @@ defmodule Then do
   defmacro __using__(_opts) do
     quote do
       Module.register_attribute(__MODULE__, :then, persist: false)
-      Module.register_attribute(__MODULE__, :functions_with_then, accumulate: true, persist: false)
+
+      Module.register_attribute(__MODULE__, :functions_with_then,
+        accumulate: true,
+        persist: false
+      )
+
       @on_definition Then
       @before_compile Then
     end
   end
 
-  def __on_definition__(env, kind, function_name, args, _guards, _body) when kind in [:def, :defp] do
+  def __on_definition__(env, kind, function_name, args, _guards, _body)
+      when kind in [:def, :defp] do
     then_callback = Module.get_attribute(env.module, :then)
 
     if then_callback do
@@ -32,11 +38,16 @@ defmodule Then do
         raise CompileError,
           file: env.file,
           line: env.line,
-          description: "Multiple @then attributes for function #{function_name}/#{arity}. " <>
-                      "Only one @then per function is allowed."
+          description:
+            "Multiple @then attributes for function #{function_name}/#{arity}. " <>
+              "Only one @then per function is allowed."
       end
 
-      Module.put_attribute(env.module, :functions_with_then, {function_name, arity, validated_callback})
+      Module.put_attribute(
+        env.module,
+        :functions_with_then,
+        {function_name, arity, validated_callback}
+      )
     end
   end
 
@@ -62,7 +73,8 @@ defmodule Then do
         raise CompileError,
           file: env.file,
           line: env.line,
-          description: "Invalid @then format. Expected :function_name or {Module, :function_name}, got: #{inspect(callback)}"
+          description:
+            "Invalid @then format. Expected :function_name or {Module, :function_name}, got: #{inspect(callback)}"
     end
   end
 

mix.exs

@@ -52,7 +52,8 @@ defmodule Then.MixProject do
 
   defp deps do
     [
-      {:ex_doc, "~> 0.14", only: :dev, runtime: false}
+      {:ex_doc, "~> 0.14", only: :dev, runtime: false},
+      {:credo, "~> 1.7", only: :dev, runtime: false}
     ]
   end
 end

mix.lock

@@ -1,6 +1,10 @@
 %{
+  "bunt": {:hex, :bunt, "1.0.0", "081c2c665f086849e6d57900292b3a161727ab40431219529f13c4ddcf3e7a44", [:mix], [], "hexpm", "dc5f86aa08a5f6fa6b8096f0735c4e76d54ae5c9fa2c143e5a1fc7c1cd9bb6b5"},
+  "credo": {:hex, :credo, "1.7.13", "126a0697df6b7b71cd18c81bc92335297839a806b6f62b61d417500d1070ff4e", [:mix], [{:bunt, "~> 0.2.1 or ~> 1.0", [hex: :bunt, repo: "hexpm", optional: false]}, {:file_system, "~> 0.2 or ~> 1.0", [hex: :file_system, repo: "hexpm", optional: false]}, {:jason, "~> 1.0", [hex: :jason, repo: "hexpm", optional: false]}], "hexpm", "47641e6d2bbff1e241e87695b29f617f1a8f912adea34296fb10ecc3d7e9e84f"},
   "earmark_parser": {:hex, :earmark_parser, "1.4.44", "f20830dd6b5c77afe2b063777ddbbff09f9759396500cdbe7523efd58d7a339c", [:mix], [], "hexpm", "4778ac752b4701a5599215f7030989c989ffdc4f6df457c5f36938cc2d2a2750"},
   "ex_doc": {:hex, :ex_doc, "0.38.3", "ddafe36b8e9fe101c093620879f6604f6254861a95133022101c08e75e6c759a", [:mix], [{:earmark_parser, "~> 1.4.44", [hex: :earmark_parser, repo: "hexpm", optional: false]}, {:makeup_c, ">= 0.1.0", [hex: :makeup_c, repo: "hexpm", optional: true]}, {:makeup_elixir, "~> 0.14 or ~> 1.0", [hex: :makeup_elixir, repo: "hexpm", optional: false]}, {:makeup_erlang, "~> 0.1 or ~> 1.0", [hex: :makeup_erlang, repo: "hexpm", optional: false]}, {:makeup_html, ">= 0.1.0", [hex: :makeup_html, repo: "hexpm", optional: true]}], "hexpm", "ecaa785456a67f63b4e7d7f200e8832fa108279e7eb73fd9928e7e66215a01f9"},
+  "file_system": {:hex, :file_system, "1.1.1", "31864f4685b0148f25bd3fbef2b1228457c0c89024ad67f7a81a3ffbc0bbad3a", [:mix], [], "hexpm", "7a15ff97dfe526aeefb090a7a9d3d03aa907e100e262a0f8f7746b78f8f87a5d"},
+  "jason": {:hex, :jason, "1.4.4", "b9226785a9aa77b6857ca22832cffa5d5011a667207eb2a0ad56adb5db443b8a", [:mix], [{:decimal, "~> 1.0 or ~> 2.0", [hex: :decimal, repo: "hexpm", optional: true]}], "hexpm", "c5eb0cab91f094599f94d55bc63409236a8ec69a21a67814529e8d5f6cc90b3b"},
   "makeup": {:hex, :makeup, "1.2.1", "e90ac1c65589ef354378def3ba19d401e739ee7ee06fb47f94c687016e3713d1", [:mix], [{:nimble_parsec, "~> 1.4", [hex: :nimble_parsec, repo: "hexpm", optional: false]}], "hexpm", "d36484867b0bae0fea568d10131197a4c2e47056a6fbe84922bf6ba71c8d17ce"},
   "makeup_elixir": {:hex, :makeup_elixir, "1.0.1", "e928a4f984e795e41e3abd27bfc09f51db16ab8ba1aebdba2b3a575437efafc2", [:mix], [{:makeup, "~> 1.0", [hex: :makeup, repo: "hexpm", optional: false]}, {:nimble_parsec, "~> 1.2.3 or ~> 1.3", [hex: :nimble_parsec, repo: "hexpm", optional: false]}], "hexpm", "7284900d412a3e5cfd97fdaed4f5ed389b8f2b4cb49efc0eb3bd10e2febf9507"},
   "makeup_erlang": {:hex, :makeup_erlang, "1.0.2", "03e1804074b3aa64d5fad7aa64601ed0fb395337b982d9bcf04029d68d51b6a7", [:mix], [{:makeup, "~> 1.0", [hex: :makeup, repo: "hexpm", optional: false]}], "hexpm", "af33ff7ef368d5893e4a267933e7744e46ce3cf1f61e2dccf53a111ed3aa3727"},