try using vcpkg on mac

Author: lriggs

.github/workflows/jarbuild.yml

@@ -205,14 +205,17 @@ jobs:
           python-version: 3.12
       - name: Install Archery
         run: pip install -e arrow/dev/archery[all]
+      - name: Checkout vcpkg
+        uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
+        with:
+          repository: Microsoft/vcpkg
+          path: arrow/cpp/submodules/vcpkg
       - name: Install vcpkg
         run: |
-          # Install vcpkg
-          git clone https://github.com/Microsoft/vcpkg.git /usr/local/vcpkg
-          cd /usr/local/vcpkg
+          cd arrow/cpp/submodules/vcpkg
           ./bootstrap-vcpkg.sh
-          echo "VCPKG_ROOT=/usr/local/vcpkg" >> ${GITHUB_ENV}
-          echo "/usr/local/vcpkg" >> ${GITHUB_PATH}
+          echo "VCPKG_ROOT=${PWD}/arrow/cpp/submodules/vcpkg" >> ${GITHUB_ENV}
+          echo "${PWD}/arrow/cpp/submodules/vcpkg" >> ${GITHUB_PATH}
       - name: Install dependencies
         run: |
           # Clean up any existing LLVM installations
@@ -234,7 +237,7 @@ jobs:
           brew install cmake ninja pkg-config
 
           # Use vcpkg to install LLVM and other dependencies
-          export VCPKG_ROOT=/usr/local/vcpkg
+          # export VCPKG_ROOT=/usr/local/vcpkg
           vcpkg install \
             --clean-after-build \
             --x-install-root=${VCPKG_ROOT}/installed \
@@ -270,7 +273,7 @@ jobs:
         run: |
           set -e
           # Set up vcpkg environment
-          export VCPKG_ROOT=/usr/local/vcpkg
+          # export VCPKG_ROOT=/usr/local/vcpkg
           export VCPKG_OVERLAY_PORTS=arrow/ci/vcpkg/overlay/llvm
           export CMAKE_TOOLCHAIN_FILE=${VCPKG_ROOT}/scripts/buildsystems/vcpkg.cmake