Set up ex_check to run in test env

.check.exs

@@ -0,0 +1,35 @@
+[
+  ## don't run tools concurrently
+  # parallel: false,
+
+  ## don't print info about skipped tools
+  # skipped: false,
+
+  ## always run tools in fix mode (put it in ~/.check.exs locally, not in project config)
+  # fix: true,
+
+  ## don't retry automatically even if last run resulted in failures
+  # retry: false,
+
+  ## list of tools (see `mix check` docs for a list of default curated tools)
+  tools: [
+    {:compiler, env: %{"MIX_ENV" => "test"}},
+    {:formatter, env: %{"MIX_ENV" => "test"}}
+
+    ## curated tools may be disabled (e.g. the check for compilation warnings)
+    # {:compiler, false},
+
+    ## ...or have command & args adjusted (e.g. enable skip comments for sobelow)
+    # {:sobelow, "mix sobelow --exit --skip"},
+
+    ## ...or reordered (e.g. to see output from dialyzer before others)
+    # {:dialyzer, order: -1},
+
+    ## ...or reconfigured (e.g. disable parallel execution of ex_unit in umbrella)
+    # {:ex_unit, umbrella: [parallel: false]},
+
+    ## custom new tools may be added (Mix tasks or arbitrary commands)
+    # {:my_task, "mix my_task", env: %{"MIX_ENV" => "prod"}},
+    # {:my_tool, ["my_tool", "arg with spaces"]}
+  ]
+]

ideas.md

@@ -2,3 +2,4 @@
   - Use a UUID for the media database ID (or at least alongside it)
 - Look into this and its recommended plugins https://hexdocs.pm/ex_check/readme.html
 - Add output template option for the source's friendly name
+- TODO: Install Elixir 1.16.2 when available to fix bug with `ex_check` https://github.com/karolsluszniak/ex_check/issues/41#issuecomment-1921390413

mix.exs

@@ -9,7 +9,11 @@ defmodule Pinchflat.MixProject do
       elixirc_paths: elixirc_paths(Mix.env()),
       start_permanent: Mix.env() == :prod,
       aliases: aliases(),
-      deps: deps()
+      deps: deps(),
+      preferred_cli_env: [
+        check: :test,
+        credo: :test
+      ]
     ]
   end
 
@@ -55,7 +59,7 @@ defmodule Pinchflat.MixProject do
       {:nimble_parsec, "~> 1.4"},
       {:mox, "~> 1.0", only: :test},
       {:credo, "~> 1.7", only: [:dev, :test], runtime: false},
-      {:ex_check, "~> 0.14.0", only: [:dev], runtime: false},
+      {:ex_check, "~> 0.14.0", only: [:dev, :test], runtime: false},
       {:faker, "~> 0.17", only: :test}
     ]
   end