ci: enable sccache in GHA build

Author: brettlangdon

.github/workflows/build_python_3.yml

@@ -96,12 +96,27 @@ jobs:
         if [[ "$(uname -m)-$(uname -i)-$(uname -o | tr '[:upper:]' '[:lower:]')-$(ldd --version 2>&1 | head -n 1 | awk '{print $1}')" != "i686-unknown-linux-musl" ]]; then
           curl -sSf https://sh.rustup.rs | sh -s -- -y;
         fi
-      CIBW_ENVIRONMENT_LINUX: PATH=$HOME/.cargo/bin:$PATH CMAKE_BUILD_PARALLEL_LEVEL=24 CMAKE_ARGS="-DNATIVE_TESTING=OFF" SETUPTOOLS_SCM_PRETEND_VERSION_FOR_DDTRACE=${{ needs.compute_version.outputs.library_version }}
+      CIBW_ENVIRONMENT_LINUX: >
+        PATH=$HOME/.cargo/bin:$PATH
+        CARGO_BUILD_JOBS=24
+        CMAKE_BUILD_PARALLEL_LEVEL=24
+        CMAKE_ARGS="-DNATIVE_TESTING=OFF"
+        SETUPTOOLS_SCM_PRETEND_VERSION_FOR_DDTRACE=${{ needs.compute_version.outputs.library_version }}
+        SCCACHE_GHA_ENABLED=true
+        SCCACHE_DIR=/host/${{ env.SCCACHE_DIR }}
+        SCCACHE_PATH=/host/${{ env.SCCACHE_PATH }}
+        SCCACHE_CACHE_SIZE=1G
+        DD_USE_SCCACHE=1
       # SYSTEM_VERSION_COMPAT is a workaround for versioning issue, a.k.a.
       # `platform.mac_ver()` reports incorrect MacOS version at 11.0
       # See: https://stackoverflow.com/a/65402241
-      CIBW_ENVIRONMENT_MACOS: CMAKE_BUILD_PARALLEL_LEVEL=24 SYSTEM_VERSION_COMPAT=0 CMAKE_ARGS="-DNATIVE_TESTING=OFF" SETUPTOOLS_SCM_PRETEND_VERSION_FOR_DDTRACE=${{ needs.compute_version.outputs.library_version }}
-      CIBW_ENVIRONMENT_WINDOWS: SETUPTOOLS_SCM_PRETEND_VERSION_FOR_DDTRACE=${{ needs.compute_version.outputs.library_version }}
+      CIBW_ENVIRONMENT_MACOS: >
+        CMAKE_BUILD_PARALLEL_LEVEL=24
+        SYSTEM_VERSION_COMPAT=0
+        CMAKE_ARGS="-DNATIVE_TESTING=OFF"
+        SETUPTOOLS_SCM_PRETEND_VERSION_FOR_DDTRACE=${{ needs.compute_version.outputs.library_version }}
+      CIBW_ENVIRONMENT_WINDOWS: >
+        SETUPTOOLS_SCM_PRETEND_VERSION_FOR_DDTRACE=${{ needs.compute_version.outputs.library_version }}
       # cibuildwheel repair will copy anything's under /output directory from the
       # build container to the host machine. This is a bit hacky way, but seems
       # to be the only way getting debug symbols out from the container while
@@ -121,6 +136,7 @@ jobs:
         python scripts/zip_filter.py {wheel} \*.c \*.cpp \*.cc \*.h \*.hpp \*.pyx \*.md &&
         MACOSX_DEPLOYMENT_TARGET=12.7 delocate-wheel --require-archs {delocate_archs} -w {dest_dir} -v {wheel}
       CIBW_REPAIR_WHEEL_COMMAND_WINDOWS: python scripts/zip_filter.py "{wheel}" "*.c" "*.cpp" "*.cc" "*.h" "*.hpp" "*.pyx" "*.md" && mv "{wheel}" "{dest_dir}"
+      CIBW_BEFORE_TEST_LINUX: /host/${{ env.SCCACHE_PATH }} --show-stats
       CIBW_TEST_COMMAND: "python {project}/tests/smoke_test.py"
 
     steps:
@@ -129,6 +145,9 @@ jobs:
           persist-credentials: false
           fetch-depth: 0
 
+      - name: Enable sccache
+        uses: mozilla-actions/sccache-action@7d986dd989559c6ecdb630a3fd2557667be217ad  # 0.0.9
+
       - uses: actions/setup-python@a26af69be951a213d495a4c3e4e4022e16d87065 # v5.6.0
         name: Install Python
         with: