[Task] : Add cache build for macos.

Author: sahas3

.github/actions/setup-build/action.yml

@@ -40,7 +40,7 @@ runs:
     - name: Install PyTorch nightly depends
       if: ${{ runner.os != 'Linux' }}
       run: |
-        python -m pip install --no-cache-dir torch torchvision --index-url https://download.pytorch.org/whl/cpu
+        python -m pip install -r build-requirements.txt
       shell: bash
 
     - name: Install prerequisites (Linux)

build_tools/ci/install_python_deps.sh

@@ -19,7 +19,7 @@ case $torch_version in
     ;;
   stable)
     echo "::group::installing stable torch"
-    python3 -m pip install --no-cache-dir torch torchvision --index-url https://download.pytorch.org/whl/cpu
+    # python3 -m pip install --no-cache-dir torch torchvision --index-url https://download.pytorch.org/whl/cpu
     python3 -m pip install --no-cache-dir -r $repo_root/build-requirements.txt
     echo "::endgroup::"
     ;;

build_tools/python_deploy/build_macos_packages.sh

@@ -23,6 +23,22 @@ repo_root="$(cd "$this_dir"/../../ && pwd)"
 python_versions="${TORCH_MLIR_PYTHON_VERSIONS:-3.9 3.10 3.11}"
 output_dir="${output_dir:-${this_dir}/wheelhouse}"
 packages="${packages:-torch-mlir}"
+cache_dir="${cache_dir:-}"
+
+# Setup cache dir.
+if [ -z "${cache_dir}" ]; then
+  cache_dir="${repo_root}/.build-cache"
+  mkdir -p "${cache_dir}"
+  cache_dir="$(cd ${cache_dir} && pwd)"
+fi
+echo "Caching to ${cache_dir}"
+mkdir -p "${cache_dir}/ccache"
+mkdir -p "${cache_dir}/pip"
+
+export CCACHE_DIR="${cache_dir}/ccache"
+export CCACHE_MAXSIZE="350M"
+export CMAKE_C_COMPILER_LAUNCHER=ccache
+export CMAKE_CXX_COMPILER_LAUNCHER=ccache
 
 PKG_VER_FILE="${repo_root}"/torch_mlir_package_version ; [ -f "$PKG_VER_FILE" ] && . "$PKG_VER_FILE"
 export TORCH_MLIR_PYTHON_PACKAGE_VERSION="${TORCH_MLIR_PYTHON_PACKAGE_VERSION:-0.0.1}"