Download specific cmake version as binary executable for macOS.

Author: kannanjgithub

buildscripts/kokoro/macos.sh

@@ -1,14 +1,17 @@
 #!/bin/bash
 set -veux -o pipefail
-CMAKE_VERSION=3.26.3
+CMAKE_VERSION=3.31.10
 
 if [[ -f /VERSION ]]; then
   cat /VERSION
 fi
 
 readonly GRPC_JAVA_DIR="$(cd "$(dirname "$0")"/../.. && pwd)"
 
-brew install cmake@${CMAKE_VERSION}
+DOWNLOAD_DIR=/tmp/source
+mkdir -p ${DOWNLOAD_DIR}
+curl -Ls https://github.com/Kitware/CMake/releases/download/v${CMAKE_VERSION}/cmake-${CMAKE_VERSION}-macos-universal.tar.gz | tar xz -C ${DOWNLOAD_DIR}
+
 # We had problems with random tests timing out because it took seconds to do
 # trivial (ns) operations. The Kokoro Mac machines have 2 cores with 4 logical
 # threads, so Gradle should be using 4 workers by default.
@@ -18,6 +21,6 @@ export GRADLE_FLAGS="${GRADLE_FLAGS:-} --max-workers=2"
 trap spongify_logs EXIT
 
 export -n JAVA_HOME
-export PATH="$(/usr/libexec/java_home -v"1.8.0")/bin:${PATH}"
+export PATH="$(/usr/libexec/java_home -v"1.8.0")/bin:${DOWNLOAD_DIR}/cmake-${CMAKE_VERSION}-macos-universal/CMake.app/Contents/bin:${PATH}"
 
 "$GRPC_JAVA_DIR"/buildscripts/kokoro/unix.sh