[ci] [R-package] re-enable clang-18 testing (fixes #6369)

.ci/install-clang-devel.sh

@@ -4,11 +4,30 @@
 #
 #   Installs a development version of clang and the other LLVM tools.
 #
+#   Supported operating systems:
+#
+#     - Debian
+#     - Ubuntu
+#
+# [usage]
+#
+#   ./install-clang-devel.sh 18
+#
 
 set -e -E -u -o pipefail
 
 CLANG_VERSION=${1}
 
+# get short name, e.g. 'debian', 'ubuntu'
+OS_NAME=$(
+    cat /etc/os-release \
+    | grep -E '^NAME' \
+    | cut -d '=' -f2 \
+    | cut -d ' ' -f1 \
+    | tr -d '"' \
+    | tr '[:upper:]' '[:lower:]'
+)
+
 apt-get autoremove -y --purge \
     clang-* \
     libclang-* \
@@ -25,10 +44,17 @@ apt-get install --no-install-recommends -y \
 wget -O - https://apt.llvm.org/llvm-snapshot.gpg.key | apt-key add -
 
 # ref: https://apt.llvm.org/
-add-apt-repository -y "deb http://apt.llvm.org/unstable/ llvm-toolchain main"
-add-apt-repository -y "deb-src http://apt.llvm.org/unstable/ llvm-toolchain main"
-add-apt-repository -y "deb http://apt.llvm.org/unstable/ llvm-toolchain-${CLANG_VERSION} main" || true
-add-apt-repository -y "deb-src http://apt.llvm.org/unstable/ llvm-toolchain-${CLANG_VERSION} main" || true
+if [[ ${OS_NAME} == "debian" ]]; then
+    add-apt-repository -y "deb [trusted=yes] http://apt.llvm.org/unstable/ llvm-toolchain main"
+    add-apt-repository -y "deb-src [trusted=yes] http://apt.llvm.org/unstable/ llvm-toolchain main"
+    add-apt-repository -y "deb [trusted=yes] http://apt.llvm.org/unstable/ llvm-toolchain-${CLANG_VERSION} main" || true
+    add-apt-repository -y "deb-src [trusted=yes] http://apt.llvm.org/unstable/ llvm-toolchain-${CLANG_VERSION} main" || true
+elif [[ ${OS_NAME} == "ubuntu" ]]; then
+    UBUNTU_CODENAME=$(lsb_release --codename --short)
+    add-apt-repository -y "deb http://apt.llvm.org/jammy/ llvm-toolchain-${UBUNTU_CODENAME}-${CLANG_VERSION} main"
+    add-apt-repository -y "deb-src http://apt.llvm.org/jammy/ llvm-toolchain-${UBUNTU_CODENAME}-${CLANG_VERSION} main"
+fi
+
 apt-get update -y
 
 apt-get install -y --no-install-recommends \

.github/workflows/r_package.yml

@@ -264,19 +264,25 @@ jobs:
           RDscript${{ matrix.r_customization }} testthat.R >> tests.log 2>&1 || exit_code=-1
           cat ./tests.log
           exit ${exit_code}
-  test-r-debian-clang:
-    name: r-package (debian, R-devel, clang-${{ matrix.clang-version }})
+  test-r-devel-clang:
+    name: r-package (${{ matrix.os }}, R-devel, clang-${{ matrix.clang-version }})
     timeout-minutes: 60
     strategy:
       fail-fast: false
       matrix:
         # list of versions tested in CRAN "Additional Checks":
         # https://cran.r-project.org/web/checks/check_issue_kinds.html
-        clang-version:
-          - 16
-          - 17
+        include:
+          - clang-version: 16
+            container: rhub/debian-clang-devel
+            os: debian
+          - clang-version: 17
+            container: rhub/debian-clang-devel
+            os: debian
+          - clang-version: 18
+            container: ghcr.io/r-hub/containers/ubuntu-clang
+            os: ubuntu
     runs-on: ubuntu-latest
-    container: rhub/debian-clang-devel
     env:
       DEBIAN_FRONTEND: noninteractive
     steps:
@@ -315,7 +321,7 @@ jobs:
   all-r-package-jobs-successful:
     if: always()
     runs-on: ubuntu-latest
-    needs: [test, test-r-debian-clang]
+    needs: [test, test-r-devel-clang]
     steps:
     - name: Note that all tests succeeded
       uses: re-actors/[email protected]