Support LLVM 16

.github/workflows/llvm.yml

@@ -15,39 +15,41 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        llvm_version: ["13.0.0", "14.0.0", "15.0.6"]
         include:
+          - llvm_version: "13.0.0"
+            llvm_ubuntu_version: "20.04"
+          - llvm_version: "14.0.0"
+            llvm_ubuntu_version: "18.04"
+          - llvm_version: "15.0.6"
+            llvm_ubuntu_version: "18.04"
           - llvm_version: "16.0.3"
-            force_version: true
-            ubuntu_version: "22.04"
+            llvm_ubuntu_version: "22.04"
     name: "LLVM ${{ matrix.llvm_version }}"
     steps:
       - name: Checkout Crystal source
         uses: actions/checkout@v3
 
-      - name: Cache LLVM and Clang
+      - name: Cache LLVM
         id: cache-llvm
         uses: actions/cache@v3
         with:
-          path: |
-            C:/Program Files/LLVM
-            ./llvm
+          path: ./llvm
           key: llvm-${{ matrix.llvm_version }}
         if: "${{ !env.ACT }}"
 
-      - uses: KyleMayes/install-llvm-action@13d5d77cbf0bd7e35cb02a8f9ed4bb85bed3393b # v1.8.0
-        with:
-          version: "${{ matrix.llvm_version }}"
-          force-version: "${{ matrix.force_version }}"
-          ubuntu-version: "${{ matrix.ubuntu_version }}"
-          cached: ${{ steps.cache-llvm.outputs.cache-hit }}
-
-      - name: Install dependencies
-        run: sudo apt-get install -y libtinfo5
+      - name: Install LLVM ${{ matrix.llvm_version }}
+        run: |
+          mkdir -p llvm
+          curl -L "https://github.com/llvm/llvm-project/releases/download/llvmorg-${{ matrix.llvm_version }}/clang+llvm-${{ matrix.llvm_version }}-x86_64-linux-gnu-ubuntu-${{ matrix.llvm_ubuntu_version }}.tar.xz" > llvm.tar.xz
+          tar x --xz -C llvm --strip-components=1 -f llvm.tar.xz
+        if: steps.cache-llvm.outputs.cache-hit != 'true'
 
-      - name: Set LLVM_CONFIG
-        # LLVM_PATH is set by install-llvm-action
-        run: echo "LLVM_CONFIG=$LLVM_PATH/bin/llvm-config" >> $GITHUB_ENV
+      - name: Set up LLVM
+        run: |
+          sudo apt-get install -y libtinfo5
+          echo "PATH=$(pwd)/llvm/bin:$PATH" >> $GITHUB_ENV
+          echo "LLVM_CONFIG=$(pwd)/llvm/bin/llvm-config" >> $GITHUB_ENV
+          echo "LD_LIBRARY_PATH=$(pwd)/llvm/lib:$LD_LIBRARY_PATH" >> $GITHUB_ENV
 
       - name: Install Crystal
         uses: crystal-lang/install-crystal@v1