Enable ccache for XCode builds.

This uses ccache + github caching to substantially decrease the time it takes to run XCode builds.  Due to Bazel caching, these are some of our slowest tests, causing one of the biggest presubmit bottlenecks

PiperOrigin-RevId: 507794241

.github/workflows/test_objectivec.yml

@@ -34,9 +34,22 @@ jobs:
         with:
           ref: ${{ inputs.safe-checkout }}
 
+      - name: Setup ccache
+        uses: ./.github/actions/ccache
+        with:
+          cache-prefix: objectivec_macos_${{ matrix.config }}
+          support-modules: true
+
       - name: Run tests
         uses: ./.github/actions/bazel
+        env:
+          CC: ${{ github.workspace }}/ci/clang_wrapper
+          CXX: ${{ github.workspace }}/ci/clang_wrapper++
         with:
           credentials: ${{ secrets.GAR_SERVICE_ACCOUNT }}
           bazel-cache: objectivec_macos/${{ matrix.config }}
           bash: objectivec/DevTools/full_mac_build.sh ${{ matrix.flags }}
+
+      - name: Report ccache stats
+        shell: bash
+        run: ccache -s -v

ci/clang_wrapper

@@ -0,0 +1,3 @@
+#!/bin/sh
+# This file wraps clang with ccache to enable faster runs of xcodebuild
+ccache clang "$@"

ci/clang_wrapper++

@@ -0,0 +1,3 @@
+#!/bin/sh
+# This file wraps clang with ccache to enable faster runs of xcodebuild
+ccache clang++ "$@"

objectivec/DevTools/full_mac_build.sh

@@ -2,6 +2,7 @@
 #
 # Helper to do build so you don't have to remember all the steps/args.
 
+echo "::group::Run full mac build"
 
 set -eu
 
@@ -179,16 +180,16 @@ fi
 
 if [[ "${CORE_ONLY}" == "yes" ]] ; then
   header "Building core Only"
-  ${BazelBin} build //:protoc //:protobuf //:protobuf_lite $BazelFlags
+  time ${BazelBin} build //:protoc //:protobuf //:protobuf_lite $BazelFlags
 else
   header "Building"
   # Can't issue these together, when fully parallel, something sometimes chokes
   # at random.
-  ${BazelBin} test //src/... $BazelFlags
+  time ${BazelBin} test //src/... $BazelFlags
 fi
 
 # Ensure the WKT sources checked in are current.
-objectivec/generate_well_known_types.sh --check-only $BazelFlags
+time objectivec/generate_well_known_types.sh --check-only $BazelFlags
 
 header "Checking on the ObjC Runtime Code"
 # Some of the kokoro machines don't have python3 yet, so fall back to python if need be.
@@ -241,11 +242,11 @@ if [[ "${DO_XCODE_IOS_TESTS}" == "yes" ]] ; then
   esac
   if [[ "${DO_XCODE_DEBUG}" == "yes" ]] ; then
     header "Doing Xcode iOS build/tests - Debug"
-    "${XCODEBUILD_TEST_BASE_IOS[@]}" -configuration Debug test
+    time "${XCODEBUILD_TEST_BASE_IOS[@]}" -configuration Debug test
   fi
   if [[ "${DO_XCODE_RELEASE}" == "yes" ]] ; then
     header "Doing Xcode iOS build/tests - Release"
-    "${XCODEBUILD_TEST_BASE_IOS[@]}" -configuration Release test
+    time "${XCODEBUILD_TEST_BASE_IOS[@]}" -configuration Release test
   fi
   # Don't leave the simulator in the developer's face.
   killall Simulator 2> /dev/null || true
@@ -269,11 +270,11 @@ if [[ "${DO_XCODE_OSX_TESTS}" == "yes" ]] ; then
   esac
   if [[ "${DO_XCODE_DEBUG}" == "yes" ]] ; then
     header "Doing Xcode OS X build/tests - Debug"
-    "${XCODEBUILD_TEST_BASE_OSX[@]}" -configuration Debug test
+    time "${XCODEBUILD_TEST_BASE_OSX[@]}" -configuration Debug test
   fi
   if [[ "${DO_XCODE_RELEASE}" == "yes" ]] ; then
     header "Doing Xcode OS X build/tests - Release"
-    "${XCODEBUILD_TEST_BASE_OSX[@]}" -configuration Release test
+    time "${XCODEBUILD_TEST_BASE_OSX[@]}" -configuration Release test
   fi
 fi
 if [[ "${DO_XCODE_TVOS_TESTS}" == "yes" ]] ; then
@@ -305,18 +306,20 @@ if [[ "${DO_XCODE_TVOS_TESTS}" == "yes" ]] ; then
   fi
   if [[ "${DO_XCODE_DEBUG}" == "yes" ]] ; then
     header "Doing Xcode tvOS build/tests - Debug"
-    "${XCODEBUILD_TEST_BASE_TVOS[@]}" -configuration Debug test
+    time "${XCODEBUILD_TEST_BASE_TVOS[@]}" -configuration Debug test
   fi
   if [[ "${DO_XCODE_RELEASE}" == "yes" ]] ; then
     header "Doing Xcode tvOS build/tests - Release"
-    "${XCODEBUILD_TEST_BASE_TVOS[@]}" -configuration Release test
+    time "${XCODEBUILD_TEST_BASE_TVOS[@]}" -configuration Release test
   fi
 fi
 
 if [[ "${DO_OBJC_CONFORMANCE_TESTS}" == "yes" ]] ; then
   header "Running ObjC Conformance Tests"
-  ${BazelBin} test //objectivec:conformance_test $BazelFlags
+  time ${BazelBin} test //objectivec:conformance_test $BazelFlags
 fi
 
 echo ""
 echo "$(basename "${0}"): Success!"
+
+echo "::endgroup::"