[llvm] Use container on Linux to run llvm-project-tests workflow (PR #81349)

[Tom Stellard via llvm-commits]

https://github.com/tstellar created https://github.com/llvm/llvm-project/pull/81349

None

>From fb50c28172dbf88bdc4a0e8abc0276b417744f5b Mon Sep 17 00:00:00 2001
From: Tom Stellard <tstellar at redhat.com>
Date: Wed, 7 Feb 2024 17:42:07 -0800
Subject: [PATCH] Use container on Linux to run llvm-project-tests workflow

---
 .github/workflows/llvm-project-tests.yml | 10 ++++++++--
 1 file changed, 8 insertions(+), 2 deletions(-)

diff --git a/.github/workflows/llvm-project-tests.yml b/.github/workflows/llvm-project-tests.yml
index 68b4a68d1af984..228ac0276861bf 100644
--- a/.github/workflows/llvm-project-tests.yml
+++ b/.github/workflows/llvm-project-tests.yml
@@ -58,6 +58,10 @@ jobs:
   lit-tests:
     name: Lit Tests
     runs-on: ${{ matrix.os }}
+    container:
+      image: ${{(startsWith(matrix.os, 'ubuntu') && format('ghcr.io/{0}/ci-ubuntu-22.04:latest', github.repository_owner)) || null}}
+      volumes:
+        - /mnt/:/mnt/
     strategy:
       fail-fast: false
       matrix:
@@ -77,6 +81,7 @@ jobs:
         with:
           python-version: ${{ inputs.python_version }}
       - name: Install Ninja
+        if: runner.os != 'Linux'
         uses: llvm/actions/install-ninja at main
       # actions/checkout deletes any existing files in the new git directory,
       # so this needs to either run before ccache-action or it has to use
@@ -108,8 +113,8 @@ jobs:
         run: |
           if [ "${{ runner.os }}" == "Linux" ]; then
             builddir="/mnt/build/"
-            sudo mkdir -p $builddir
-            sudo chown `whoami`:`whoami` $builddir
+            mkdir -p $builddir
+            extra_cmake_args="-DCMAKE_CXX_COMPILER=clang++ -DCMAKE_C_COMPILER=clang"
           else
             builddir="$(pwd)"/build
           fi
@@ -123,6 +128,7 @@ jobs:
                 -DLLDB_INCLUDE_TESTS=OFF \
                 -DCMAKE_C_COMPILER_LAUNCHER=sccache \
                 -DCMAKE_CXX_COMPILER_LAUNCHER=sccache \
+                $extra_cmake_args \
                 ${{ inputs.extra_cmake_args }}
           ninja -C "$builddir" '${{ inputs.build_target }}'