fix: add missing development dependency

Author: nelsonmestevao

.gitignore

@@ -21,3 +21,9 @@ pdf_extractor-*.tar
 
 # Temporary files, for example, from tests.
 /tmp/
+
+# If you run "mix dialyzer", PLT files will be written to this directory.
+/.dialyzer/
+
+# Ignore plts files generated dialyzer
+/priv/plts/

mix.exs

@@ -17,6 +17,8 @@ defmodule PdfExtractor.MixProject do
       description: description(),
       package: package(),
       docs: docs(),
+      aliases: aliases(),
+      dialyzer: dialyzer(),
       source_url: @source_url
     ]
   end
@@ -33,9 +35,16 @@ defmodule PdfExtractor.MixProject do
 
       # tools
       {:credo, "~> 1.7", only: [:dev, :test], runtime: false},
+      {:dialyxir, "~> 1.4", only: [:dev, :test], runtime: false},
       {:doctest_formatter, "~> 0.4.0", only: [:dev, :test], runtime: false},
-      {:styler, "~> 1.0", only: [:dev, :test], runtime: false},
-      {:ex_doc, "~> 0.38", only: :dev, runtime: false}
+      {:ex_doc, "~> 0.38", only: :dev, runtime: false},
+      {:styler, "~> 1.0", only: [:dev, :test], runtime: false}
+    ]
+  end
+
+  defp aliases do
+    [
+      "lint.dialyzer": ["dialyzer --format dialyxir"]
     ]
   end
 
@@ -68,4 +77,14 @@ defmodule PdfExtractor.MixProject do
       extras: ["README.md", "CHANGELOG.md", "LICENSE"]
     ]
   end
+
+  defp dialyzer do
+    [
+      flags: [:no_opaque],
+      list_unused_filters: true,
+      plt_add_deps: :apps_tree,
+      plt_add_apps: [:ex_unit, :iex, :mix, :credo_naming],
+      plt_file: {:no_warn, "priv/plts/elixir-#{System.version()}-erlang-otp-#{System.otp_release()}.plt"}
+    ]
+  end
 end

mix.lock

@@ -2,9 +2,11 @@
   "bunt": {:hex, :bunt, "1.0.0", "081c2c665f086849e6d57900292b3a161727ab40431219529f13c4ddcf3e7a44", [:mix], [], "hexpm", "dc5f86aa08a5f6fa6b8096f0735c4e76d54ae5c9fa2c143e5a1fc7c1cd9bb6b5"},
   "cc_precompiler": {:hex, :cc_precompiler, "0.1.11", "8c844d0b9fb98a3edea067f94f616b3f6b29b959b6b3bf25fee94ffe34364768", [:mix], [{:elixir_make, "~> 0.7", [hex: :elixir_make, repo: "hexpm", optional: false]}], "hexpm", "3427232caf0835f94680e5bcf082408a70b48ad68a5f5c0b02a3bea9f3a075b9"},
   "credo": {:hex, :credo, "1.7.12", "9e3c20463de4b5f3f23721527fcaf16722ec815e70ff6c60b86412c695d426c1", [: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", "8493d45c656c5427d9c729235b99d498bd133421f3e0a683e5c1b561471291e5"},
+  "dialyxir": {:hex, :dialyxir, "1.4.6", "7cca478334bf8307e968664343cbdb432ee95b4b68a9cba95bdabb0ad5bdfd9a", [:mix], [{:erlex, ">= 0.2.7", [hex: :erlex, repo: "hexpm", optional: false]}], "hexpm", "8cf5615c5cd4c2da6c501faae642839c8405b49f8aa057ad4ae401cb808ef64d"},
   "doctest_formatter": {:hex, :doctest_formatter, "0.4.0", "c40ee323a32888dccdb3f51192e7f56e1e9b2c60c70e92ea721b66e2effa777f", [:mix], [], "hexpm", "25af93001d8fc553909063cedbf7e94a18a7bd7ae3d8a26a6951946f1e4911b2"},
   "earmark_parser": {:hex, :earmark_parser, "1.4.44", "f20830dd6b5c77afe2b063777ddbbff09f9759396500cdbe7523efd58d7a339c", [:mix], [], "hexpm", "4778ac752b4701a5599215f7030989c989ffdc4f6df457c5f36938cc2d2a2750"},
   "elixir_make": {:hex, :elixir_make, "0.9.0", "6484b3cd8c0cee58f09f05ecaf1a140a8c97670671a6a0e7ab4dc326c3109726", [:mix], [], "hexpm", "db23d4fd8b757462ad02f8aa73431a426fe6671c80b200d9710caf3d1dd0ffdb"},
+  "erlex": {:hex, :erlex, "0.2.7", "810e8725f96ab74d17aac676e748627a07bc87eb950d2b83acd29dc047a30595", [:mix], [], "hexpm", "3ed95f79d1a844c3f6bf0cea61e0d5612a42ce56da9c03f01df538685365efb0"},
   "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, "1.1.0", "08d232062284546c6c34426997dd7ef6ec9f8bbd090eb91780283c9016840e8f", [:mix], [], "hexpm", "bfcf81244f416871f2a2e15c1b515287faa5db9c6bcf290222206d120b3d43f6"},
   "fine": {:hex, :fine, "0.1.4", "b19a89c1476c7c57afb5f9314aed5960b5bc95d5277de4cb5ee8e1d1616ce379", [:mix], [], "hexpm", "be3324cc454a42d80951cf6023b9954e9ff27c6daa255483b3e8d608670303f5"},