From f70ce5f8aaccc3af09922e182db55d94e058f1ce Mon Sep 17 00:00:00 2001
From: Marcel Otto <marcelotto@gmx.de>
Date: Mon, 22 Jun 2020 01:44:57 +0200
Subject: [PATCH] Run Dialyzer in CI

---
 .gitignore      | 4 ++++
 .travis.yml     | 4 ++++
 mix.exs         | 9 +++++++++
 priv/plts/.keep | 0
 4 files changed, 17 insertions(+)
 create mode 100644 priv/plts/.keep

diff --git a/.gitignore b/.gitignore
index cceeeaf..f2f2531 100644
--- a/.gitignore
+++ b/.gitignore
@@ -16,4 +16,8 @@ erl_crash.dump
 # Also ignore archive artifacts (built via "mix archive.build").
 *.ez
 
+# Dialyzer
+/priv/plts/*.plt
+/priv/plts/*.plt.hash
+
 .tool-versions*
diff --git a/.travis.yml b/.travis.yml
index 1fb41d9..214ae9a 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -22,3 +22,7 @@ matrix:
 sudo: false
 script:
   - MIX_ENV=test mix coveralls.travis
+  - mix dialyzer
+cache:
+  directories:
+    - priv/plts
diff --git a/mix.exs b/mix.exs
index f236ff6..811e2ee 100644
--- a/mix.exs
+++ b/mix.exs
@@ -28,6 +28,9 @@ defmodule JSON.LD.Mixfile do
         extras: ["README.md"]
       ],
 
+      # Dialyzer
+      dialyzer: dialyzer(),
+
       # ExCoveralls
       test_coverage: [tool: ExCoveralls],
       preferred_cli_env: [
@@ -72,6 +75,12 @@ defmodule JSON.LD.Mixfile do
     ]
   end
 
+  defp dialyzer do
+    [
+      plt_file: {:no_warn, "priv/plts/dialyzer.plt"}
+    ]
+  end
+
   defp elixirc_paths(:test), do: ["lib", "test/support"]
   defp elixirc_paths(_), do: ["lib"]
 end
diff --git a/priv/plts/.keep b/priv/plts/.keep
new file mode 100644
index 0000000..e69de29