From b5ae2987c37c1dab623baf93ed94296d1e2ac432 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Jos=C3=A9=20Valim?= <jose.valim@dashbit.co>
Date: Wed, 30 Oct 2024 09:16:39 +0100
Subject: [PATCH] Enable warnings_as_errors for Erlang only on latest
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Co-authored-by: Jonatan Männchen <jonatan@maennchen.ch>
---
 .github/workflows/ci.yml | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 57e9f1a80a0..be10cf55ded 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -30,13 +30,20 @@ jobs:
             deterministic: true
           - otp_version: "27.1"
             otp_latest: true
+            erlc_opts: "warnings_as_errors"
           - otp_version: "27.0"
+            erlc_opts: "warnings_as_errors"
           - otp_version: "26.0"
           - otp_version: master
             development: true
           - otp_version: maint
             development: true
     runs-on: ubuntu-24.04
+    # Earlier Erlang/OTP versions ignored compiler directives
+    # when using warnings_as_errors. So we only set ERLC_OPTS
+    # from Erlang/OTP 27+.
+    env:
+      ERLC_OPTS: ${{ matrix.erlc_opts || '' }}
     steps:
       - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
         with: