[CI] Add --no-install-recommends to clang >= 18 install (#180133)

malfet · pytorchmergebot · commit 296c57048988 · 2026-04-13T17:00:18.000Z
The clang >= 18 apt-get path was missing `--no-install-recommends`, which pulled in llvm-18-dev (~428 MB) as a recommended dependency of clang-18. The dev package is not needed for CI builds. This brings the install_clang layer from 877 MB to 449 MB. Authored with Claude. Pull Request resolved: #180133 Approved by: https://github.com/Skylion007
diff --git a/.ci/docker/common/install_clang.sh b/.ci/docker/common/install_clang.sh
@@ -15,7 +15,7 @@ if [ -n "$CLANG_VERSION" ]; then
 
   sudo apt-get update
   if [[ $CLANG_VERSION -ge 18 ]]; then
-    apt-get install -y libomp-${CLANG_VERSION}-dev libclang-rt-${CLANG_VERSION}-dev clang-"$CLANG_VERSION" llvm-"$CLANG_VERSION"
+    apt-get install -y --no-install-recommends libomp-${CLANG_VERSION}-dev libclang-rt-${CLANG_VERSION}-dev clang-"$CLANG_VERSION" llvm-"$CLANG_VERSION"
   else
     apt-get install -y --no-install-recommends clang-"$CLANG_VERSION" llvm-"$CLANG_VERSION"
   fi
