Add credo and styler

.credo.exs

@@ -0,0 +1,67 @@
+%{
+  configs: [
+    %{
+      name: "default",
+      files: %{
+        included: ["lib/", "src/", "web/", "apps/"],
+        excluded: []
+      },
+      plugins: [],
+      requires: [],
+      strict: false,
+      parse_timeout: 5000,
+      color: true,
+      checks: %{
+        disabled: [
+          # Styler Rewrites
+          #
+          # The following rules are automatically rewritten by Styler and so disabled here to save time
+          # Some of the rules have `priority: :high`, meaning Credo runs them unless we explicitly disable them
+          # (removing them from this file wouldn't be enough, the `false` is required)
+          #
+          # Some rules have a comment before them explaining ways Styler deviates from the Credo rule.
+          #
+          # always expands `A.{B, C}`
+          {Credo.Check.Consistency.MultiAliasImportRequireUse, false},
+          # including `case`, `fn` and `with` statements
+          {Credo.Check.Consistency.ParameterPatternMatching, false},
+          # Styler implements this rule with a depth of 3 and minimum repetition of 2
+          {Credo.Check.Design.AliasUsage, false},
+          {Credo.Check.Readability.AliasOrder, false},
+          {Credo.Check.Readability.BlockPipe, false},
+          # goes further than formatter - fixes bad underscores, eg: `100_00` -> `10_000`
+          {Credo.Check.Readability.LargeNumbers, false},
+          # adds `@moduledoc false`
+          {Credo.Check.Readability.ModuleDoc, false},
+          {Credo.Check.Readability.MultiAlias, false},
+          {Credo.Check.Readability.OneArityFunctionInPipe, false},
+          # removes parens
+          {Credo.Check.Readability.ParenthesesOnZeroArityDefs, false},
+          {Credo.Check.Readability.PipeIntoAnonymousFunctions, false},
+          {Credo.Check.Readability.PreferImplicitTry, false},
+          {Credo.Check.Readability.SinglePipe, false},
+          # **potentially breaks compilation** - see **Troubleshooting** section below
+          {Credo.Check.Readability.StrictModuleLayout, false},
+          {Credo.Check.Readability.StringSigils, false},
+          {Credo.Check.Readability.UnnecessaryAliasExpansion, false},
+          {Credo.Check.Readability.WithSingleClause, false},
+          {Credo.Check.Refactor.CaseTrivialMatches, false},
+          {Credo.Check.Refactor.CondStatements, false},
+          # in pipes only
+          {Credo.Check.Refactor.FilterCount, false},
+          # in pipes only
+          {Credo.Check.Refactor.MapInto, false},
+          # in pipes only
+          {Credo.Check.Refactor.MapJoin, false},
+          {Credo.Check.Refactor.NegatedConditionsInUnless, false},
+          {Credo.Check.Refactor.NegatedConditionsWithElse, false},
+          # allows ecto's `from
+          {Credo.Check.Refactor.PipeChainStart, false},
+          {Credo.Check.Refactor.RedundantWithClauseResult, false},
+          {Credo.Check.Refactor.UnlessWithElse, false},
+          {Credo.Check.Refactor.WithClauses, false}
+        ]
+      }
+    }
+  ]
+}

.formatter.exs

@@ -1,5 +1,6 @@
 # Used by "mix format"
 [
+  plugins: [Styler],
   inputs:
     ["{mix,.formatter}.exs", "{config,lib,test}/**/*.{ex,exs}"]
     |> Enum.flat_map(&Path.wildcard(&1, match_dot: true))

mix.exs

@@ -50,7 +50,9 @@ defmodule ExtFit.MixProject do
       {:excoveralls, "~> 0.18.0", only: [:dev, :test], runtime: false},
       {:ex_doc, "~> 0.31", only: :dev, runtime: false},
       {:dialyxir, "~> 1.3", only: [:dev], runtime: false},
-      {:csv, "~> 3.2", only: [:test]}
+      {:csv, "~> 3.2", only: [:test]},
+      {:credo, "~> 1.7", only: [:dev, :test], runtime: false},
+      {:styler, "~> 0.11", only: [:dev, :test], runtime: false}
     ]
   end
 

mix.lock

@@ -1,15 +1,19 @@
 %{
+  "bunt": {:hex, :bunt, "1.0.0", "081c2c665f086849e6d57900292b3a161727ab40431219529f13c4ddcf3e7a44", [:mix], [], "hexpm", "dc5f86aa08a5f6fa6b8096f0735c4e76d54ae5c9fa2c143e5a1fc7c1cd9bb6b5"},
   "cldr_utils": {:hex, :cldr_utils, "2.24.2", "364fa30be55d328e704629568d431eb74cd2f085752b27f8025520b566352859", [:mix], [{:castore, "~> 0.1 or ~> 1.0", [hex: :castore, repo: "hexpm", optional: true]}, {:certifi, "~> 2.5", [hex: :certifi, repo: "hexpm", optional: true]}, {:decimal, "~> 1.9 or ~> 2.0", [hex: :decimal, repo: "hexpm", optional: false]}], "hexpm", "3362b838836a9f0fa309de09a7127e36e67310e797d556db92f71b548832c7cf"},
+  "credo": {:hex, :credo, "1.7.5", "643213503b1c766ec0496d828c90c424471ea54da77c8a168c725686377b9545", [: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", "f799e9b5cd1891577d8c773d245668aa74a2fcd15eb277f51a0131690ebfb3fd"},
   "csv": {:hex, :csv, "3.2.1", "6d401f1ed33acb2627682a9ab6021e96d33ca6c1c6bccc243d8f7e2197d032f5", [:mix], [], "hexpm", "8f55a0524923ae49e97ff2642122a2ce7c61e159e7fe1184670b2ce847aee6c8"},
   "decimal": {:hex, :decimal, "2.1.1", "5611dca5d4b2c3dd497dec8f68751f1f1a54755e8ed2a966c2633cf885973ad6", [:mix], [], "hexpm", "53cfe5f497ed0e7771ae1a475575603d77425099ba5faef9394932b35020ffcc"},
   "dialyxir": {:hex, :dialyxir, "1.4.3", "edd0124f358f0b9e95bfe53a9fcf806d615d8f838e2202a9f430d59566b6b53b", [:mix], [{:erlex, ">= 0.2.6", [hex: :erlex, repo: "hexpm", optional: false]}], "hexpm", "bf2cfb75cd5c5006bec30141b131663299c661a864ec7fbbc72dfa557487a986"},
   "earmark_parser": {:hex, :earmark_parser, "1.4.39", "424642f8335b05bb9eb611aa1564c148a8ee35c9c8a8bba6e129d51a3e3c6769", [:mix], [], "hexpm", "06553a88d1f1846da9ef066b87b57c6f605552cfbe40d20bd8d59cc6bde41944"},
   "erlex": {:hex, :erlex, "0.2.6", "c7987d15e899c7a2f34f5420d2a2ea0d659682c06ac607572df55a43753aa12e", [:mix], [], "hexpm", "2ed2e25711feb44d52b17d2780eabf998452f6efda104877a3881c2f8c0c0c75"},
   "ex_doc": {:hex, :ex_doc, "0.31.1", "8a2355ac42b1cc7b2379da9e40243f2670143721dd50748bf6c3b1184dae2089", [:mix], [{:earmark_parser, "~> 1.4.39", [hex: :earmark_parser, repo: "hexpm", optional: false]}, {:makeup_c, ">= 0.1.1", [hex: :makeup_c, repo: "hexpm", optional: true]}, {:makeup_elixir, "~> 0.14", [hex: :makeup_elixir, repo: "hexpm", optional: false]}, {:makeup_erlang, "~> 0.1", [hex: :makeup_erlang, repo: "hexpm", optional: false]}], "hexpm", "3178c3a407c557d8343479e1ff117a96fd31bafe52a039079593fb0524ef61b0"},
   "excoveralls": {:hex, :excoveralls, "0.18.0", "b92497e69465dc51bc37a6422226ee690ab437e4c06877e836f1c18daeb35da9", [:mix], [{:castore, "~> 1.0", [hex: :castore, repo: "hexpm", optional: true]}, {:jason, "~> 1.0", [hex: :jason, repo: "hexpm", optional: false]}], "hexpm", "1109bb911f3cb583401760be49c02cbbd16aed66ea9509fc5479335d284da60b"},
+  "file_system": {:hex, :file_system, "1.0.0", "b689cc7dcee665f774de94b5a832e578bd7963c8e637ef940cd44327db7de2cd", [:mix], [], "hexpm", "6752092d66aec5a10e662aefeed8ddb9531d79db0bc145bb8c40325ca1d8536d"},
   "jason": {:hex, :jason, "1.4.1", "af1504e35f629ddcdd6addb3513c3853991f694921b1b9368b0bd32beb9f1b63", [:mix], [{:decimal, "~> 1.0 or ~> 2.0", [hex: :decimal, repo: "hexpm", optional: true]}], "hexpm", "fbb01ecdfd565b56261302f7e1fcc27c4fb8f32d56eab74db621fc154604a7a1"},
   "makeup": {:hex, :makeup, "1.1.1", "fa0bc768698053b2b3869fa8a62616501ff9d11a562f3ce39580d60860c3a55e", [:mix], [{:nimble_parsec, "~> 1.2.2 or ~> 1.3", [hex: :nimble_parsec, repo: "hexpm", optional: false]}], "hexpm", "5dc62fbdd0de44de194898b6710692490be74baa02d9d108bc29f007783b0b48"},
   "makeup_elixir": {:hex, :makeup_elixir, "0.16.1", "cc9e3ca312f1cfeccc572b37a09980287e243648108384b97ff2b76e505c3555", [: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", "e127a341ad1b209bd80f7bd1620a15693a9908ed780c3b763bccf7d200c767c6"},
   "makeup_erlang": {:hex, :makeup_erlang, "0.1.4", "29563475afa9b8a2add1b7a9c8fb68d06ca7737648f28398e04461f008b69521", [:mix], [{:makeup, "~> 1.0", [hex: :makeup, repo: "hexpm", optional: false]}], "hexpm", "f4ed47ecda66de70dd817698a703f8816daa91272e7e45812469498614ae8b29"},
   "nimble_parsec": {:hex, :nimble_parsec, "1.4.0", "51f9b613ea62cfa97b25ccc2c1b4216e81df970acd8e16e8d1bdc58fef21370d", [:mix], [], "hexpm", "9c565862810fb383e9838c1dd2d7d2c437b3d13b267414ba6af33e50d2d1cf28"},
+  "styler": {:hex, :styler, "0.11.9", "2595393b94e660cd6e8b582876337cc50ff047d184ccbed42fdad2bfd5d78af5", [:mix], [], "hexpm", "8b7806ba1fdc94d0a75127c56875f91db89b75117fcc67572661010c13e1f259"},
 }