From f8c36d4a772e2b42d13a7a7caf92d253160ff2a0 Mon Sep 17 00:00:00 2001
From: Benjamin Schwendinger <benjaminschwe@gmail.com>
Date: Thu, 12 Mar 2026 10:12:48 +0100
Subject: [PATCH 1/2] parse macos info site to avoid updating release version
 link

---
 .github/workflows/R-CMD-check.yaml | 17 ++++++++++++++---
 1 file changed, 14 insertions(+), 3 deletions(-)

diff --git a/.github/workflows/R-CMD-check.yaml b/.github/workflows/R-CMD-check.yaml
index fcb6d40a6..617446378 100644
--- a/.github/workflows/R-CMD-check.yaml
+++ b/.github/workflows/R-CMD-check.yaml
@@ -80,9 +80,20 @@ jobs:
         if: runner.os == 'macOS'
         run: |
           if clang --version | grep 'clang version 17'; then
-            curl -O https://mac.r-project.org/openmp/openmp-19.1.0-darwin20-Release.tar.gz
-            sudo tar fvvxz openmp-19.1.0-darwin20-Release.tar.gz -C /
-            rm -f openmp-19.1.0-darwin20-Release.tar.gz
+            if ! openmp_tarball=$(
+              apple_clang_series=$(clang --version | sed -nE 's/.*\(clang-([0-9]{4})\..*/\1/p')
+              APPLE_CLANG_SERIES="${apple_clang_series}" \
+              curl --fail --location --retry 3 --retry-all-errors --connect-timeout 20 --max-time 180 \
+                https://mac.r-project.org/openmp/ |
+              perl -0ne 'if (m{<tr>\s*<td[^>]*>.*?Apple clang \Q$ENV{APPLE_CLANG_SERIES}\E\.x.*?</td>\s*<td[^>]*>.*?<a[^>]*href="(openmp-[^"]+-darwin[^"]*-Release\.tar\.gz)"[^>]*>}si) { print $1; exit 0 } exit 1;'
+            ); then
+              echo "Failed to resolve OpenMP runtime from https://mac.r-project.org/openmp/"
+              exit 1
+            fi
+            curl --fail --location --retry 3 --retry-all-errors --connect-timeout 20 --max-time 180 \
+              -O "https://mac.r-project.org/openmp/${openmp_tarball}"
+            sudo tar fvxz "${openmp_tarball}" -C /
+            rm -f "${openmp_tarball}"
           fi # otherwise R-bundled runtime is fine
 
       - name: Install dependencies

From 5a0ef3d772bbd4fa128dd1f0d7afba6c40b92838 Mon Sep 17 00:00:00 2001
From: Benjamin Schwendinger <benjaminschwe@gmail.com>
Date: Thu, 12 Mar 2026 10:38:28 +0100
Subject: [PATCH 2/2] fail graciously

---
 .github/workflows/R-CMD-check.yaml | 20 +++++++-------------
 1 file changed, 7 insertions(+), 13 deletions(-)

diff --git a/.github/workflows/R-CMD-check.yaml b/.github/workflows/R-CMD-check.yaml
index 617446378..81b186288 100644
--- a/.github/workflows/R-CMD-check.yaml
+++ b/.github/workflows/R-CMD-check.yaml
@@ -80,20 +80,14 @@ jobs:
         if: runner.os == 'macOS'
         run: |
           if clang --version | grep 'clang version 17'; then
-            if ! openmp_tarball=$(
-              apple_clang_series=$(clang --version | sed -nE 's/.*\(clang-([0-9]{4})\..*/\1/p')
-              APPLE_CLANG_SERIES="${apple_clang_series}" \
-              curl --fail --location --retry 3 --retry-all-errors --connect-timeout 20 --max-time 180 \
-                https://mac.r-project.org/openmp/ |
-              perl -0ne 'if (m{<tr>\s*<td[^>]*>.*?Apple clang \Q$ENV{APPLE_CLANG_SERIES}\E\.x.*?</td>\s*<td[^>]*>.*?<a[^>]*href="(openmp-[^"]+-darwin[^"]*-Release\.tar\.gz)"[^>]*>}si) { print $1; exit 0 } exit 1;'
-            ); then
-              echo "Failed to resolve OpenMP runtime from https://mac.r-project.org/openmp/"
-              exit 1
+            openmp_tarball=openmp-19.1.5-darwin20-Release.tar.gz
+            if curl --fail --location --retry 3 --retry-all-errors --connect-timeout 20 --max-time 180 \
+              -O "https://mac.r-project.org/openmp/${openmp_tarball}"; then
+              sudo tar fvxz "${openmp_tarball}" -C /
+              rm -f "${openmp_tarball}"
+            else
+              echo "Warning: failed to fetch OpenMP runtime from https://mac.r-project.org/openmp/; continuing without it"
             fi
-            curl --fail --location --retry 3 --retry-all-errors --connect-timeout 20 --max-time 180 \
-              -O "https://mac.r-project.org/openmp/${openmp_tarball}"
-            sudo tar fvxz "${openmp_tarball}" -C /
-            rm -f "${openmp_tarball}"
           fi # otherwise R-bundled runtime is fine
 
       - name: Install dependencies