[CI] Add shared macOS toolchain setup action (#815)

Author: aobolensk

.github/actions/setup-macos-toolchain/action.yml

@@ -0,0 +1,15 @@
+name: 'Setup macOS Toolchain'
+description: 'Configure Xcode, Homebrew packages, MPI, LLVM, OpenMP, OpenSSL, and ninja'
+runs:
+  using: 'composite'
+  steps:
+    - name: Install Xcode
+      uses: maxim-lobanov/setup-xcode@v1
+      with:
+        xcode-version: 'latest-stable'
+    - name: Setup environment
+      shell: bash
+      run: |
+        brew update
+        brew install ninja mpich llvm libomp openssl
+        brew link libomp --overwrite --force

.github/workflows/mac.yml

@@ -22,15 +22,8 @@ jobs:
       - uses: actions/checkout@v6
         with:
           submodules: recursive
-      - name: Install Xcode
-        uses: maxim-lobanov/setup-xcode@v1
-        with:
-          xcode-version: 'latest-stable'
-      - name: Setup environment
-        run: |
-          brew update
-          brew install ninja mpich llvm libomp openssl
-          brew link libomp --overwrite --force
+      - name: Setup macOS toolchain
+        uses: ./.github/actions/setup-macos-toolchain
       - name: ccache
         uses: hendrikmuhs/ccache-action@v1.2
         with:
@@ -63,15 +56,8 @@ jobs:
     runs-on: macOS-26
     steps:
       - uses: actions/checkout@v6
-      - name: Install Xcode
-        uses: maxim-lobanov/setup-xcode@v1
-        with:
-          xcode-version: 'latest-stable'
-      - name: Setup environment
-        run: |
-          brew update
-          brew install ninja mpich llvm libomp openssl
-          brew link libomp --overwrite --force
+      - name: Setup macOS toolchain
+        uses: ./.github/actions/setup-macos-toolchain
       - name: Download installed package
         uses: ./.github/actions/download-install
         with:
@@ -92,15 +78,8 @@ jobs:
     runs-on: macOS-26
     steps:
       - uses: actions/checkout@v6
-      - name: Install Xcode
-        uses: maxim-lobanov/setup-xcode@v1
-        with:
-          xcode-version: 'latest-stable'
-      - name: Setup environment
-        run: |
-          brew update
-          brew install ninja mpich llvm libomp openssl
-          brew link libomp --overwrite --force
+      - name: Setup macOS toolchain
+        uses: ./.github/actions/setup-macos-toolchain
       - name: Download installed package
         uses: ./.github/actions/download-install
         with:

.github/workflows/perf.yml

@@ -45,15 +45,10 @@ jobs:
     runs-on: macOS-26
     steps:
       - uses: actions/checkout@v6
-      - name: Install Xcode
-        uses: maxim-lobanov/setup-xcode@v1
-        with:
-          xcode-version: 'latest-stable'
+      - name: Setup macOS toolchain
+        uses: ./.github/actions/setup-macos-toolchain
       - name: Setup environment
         run: |
-          brew update
-          brew install ninja mpich llvm libomp openssl
-          brew link libomp --overwrite --force
           python3 -m pip install -r requirements.txt --break-system-packages
       - name: Download installed package
         uses: ./.github/actions/download-install