From 271714fa76bba7ea00bf6cf65ba0450a3f81a963 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Ren=C3=A9=20F=C3=B6hring?= <rf@bamaru.de>
Date: Mon, 4 Nov 2024 18:38:58 +0100
Subject: [PATCH] Add rudimentary grep for runtime warnings in CI

---
 .github/workflows/ci-workflow.yml |  1 +
 test/error_if_warnings.sh         |  8 +++++++
 test/runtime_warnings.sh          | 38 +++++++++++++++++++++++++++++++
 3 files changed, 47 insertions(+)
 create mode 100755 test/error_if_warnings.sh
 create mode 100755 test/runtime_warnings.sh

diff --git a/.github/workflows/ci-workflow.yml b/.github/workflows/ci-workflow.yml
index 8a1a4abfa..a142fb7e0 100644
--- a/.github/workflows/ci-workflow.yml
+++ b/.github/workflows/ci-workflow.yml
@@ -49,4 +49,5 @@ jobs:
       - run: mix deps.compile
       - run: mix compile --warnings-as-errors
       - run: mix test
+      - run: ./test/runtime_warnings.sh
       - run: ./test/smoke_test.sh
diff --git a/test/error_if_warnings.sh b/test/error_if_warnings.sh
new file mode 100755
index 000000000..f7b499121
--- /dev/null
+++ b/test/error_if_warnings.sh
@@ -0,0 +1,8 @@
+grep -E "^warning: .+" --after-context=6 <&0
+
+if [ $? -eq 0 ]
+then
+  exit 1
+else
+  exit 0
+fi
diff --git a/test/runtime_warnings.sh b/test/runtime_warnings.sh
new file mode 100755
index 000000000..86749a5b7
--- /dev/null
+++ b/test/runtime_warnings.sh
@@ -0,0 +1,38 @@
+#!/bin/bash
+
+set -e
+
+mix compile --force --warnings-as-errors
+
+
+mix credo --mute-exit-status | ./test/error_if_warnings.sh
+
+mix credo --strict --enable-disabled-checks . --mute-exit-status | ./test/error_if_warnings.sh
+
+mix credo --strict --enable-disabled-checks . --mute-exit-status --format=json | ./test/error_if_warnings.sh
+
+mix credo lib/credo.ex --read-from-stdin --strict < lib/credo.ex | ./test/error_if_warnings.sh
+
+mix credo list --mute-exit-status | ./test/error_if_warnings.sh
+
+mix credo suggest --mute-exit-status | ./test/error_if_warnings.sh
+
+mix credo diff HEAD^ --mute-exit-status | ./test/error_if_warnings.sh
+
+mix credo diff v1.4.0 --mute-exit-status | ./test/error_if_warnings.sh
+
+mix credo explain test/fixtures/example_code/clean_redux.ex:1:11 --mute-exit-status | ./test/error_if_warnings.sh
+
+mix credo explain Credo.Check.Refactor.Nesting --mute-exit-status | ./test/error_if_warnings.sh
+
+mix credo categories | ./test/error_if_warnings.sh
+
+mix credo info --verbose | ./test/error_if_warnings.sh
+
+mix credo version | ./test/error_if_warnings.sh
+
+mix credo help | ./test/error_if_warnings.sh
+
+
+echo ""
+echo "Smoke test for runtime warnings successful."