CI: Use a cached copy of GoogleTest in CMake builds if possible
to minimize the possibility of errors downloading from GitHub

PiperOrigin-RevId: 835321189
Change-Id: I16101c5a5ead106c5a9beb254dde31a2b5e5df75

ci/cmake_common.sh

diff --git a/ci/cmake_common.sh b/ci/cmake_common.sh
index 484230c..53d3a37 100644
--- a/ci/cmake_common.sh
+++ b/ci/cmake_common.sh
@@ -16,4 +16,4 @@
 # Keep this in sync with the commit in the MODULE.bazel file.
 readonly ABSL_GOOGLETEST_VERSION="1.17.0"
 
-readonly ABSL_GOOGLETEST_DOWNLOAD_URL="https://github.com/google/googletest/releases/download/v${ABSL_GOOGLETEST_VERSION}/googletest-${ABSL_GOOGLETEST_VERSION}.tar.gz"
+ABSL_GOOGLETEST_DOWNLOAD_URL="https://github.com/google/googletest/releases/download/v${ABSL_GOOGLETEST_VERSION}/googletest-${ABSL_GOOGLETEST_VERSION}.tar.gz"

ci/cmake_install_test.sh

diff --git a/ci/cmake_install_test.sh b/ci/cmake_install_test.sh
index 871490f..5e3e07b 100755
--- a/ci/cmake_install_test.sh
+++ b/ci/cmake_install_test.sh
@@ -26,6 +26,12 @@
 
 source "${ABSEIL_ROOT}/ci/cmake_common.sh"
 
+# Avoid depending on GitHub by looking for a cached copy of GoogleTest.
+if [[ -r "${KOKORO_GFILE_DIR:-}/distdir/googletest-${ABSL_GOOGLETEST_VERSION}.tar.gz" ]]; then
+  ABSL_GOOGLETEST_DOWNLOAD_URL="file:///distdir/googletest-${ABSL_GOOGLETEST_VERSION}.tar.gz"
+  DOCKER_EXTRA_ARGS="--mount type=bind,source=${KOKORO_GFILE_DIR}/distdir,target=/distdir,readonly ${DOCKER_EXTRA_ARGS:-}"
+fi
+
 source "${ABSEIL_ROOT}/ci/linux_docker_containers.sh"
 readonly DOCKER_CONTAINER=${LINUX_GCC_LATEST_CONTAINER}
 

ci/linux_gcc-latest_libstdcxx_cmake.sh

diff --git a/ci/linux_gcc-latest_libstdcxx_cmake.sh b/ci/linux_gcc-latest_libstdcxx_cmake.sh
index d75209b..2f69bba 100755
--- a/ci/linux_gcc-latest_libstdcxx_cmake.sh
+++ b/ci/linux_gcc-latest_libstdcxx_cmake.sh
@@ -22,6 +22,12 @@
 
 source "${ABSEIL_ROOT}/ci/cmake_common.sh"
 
+# Avoid depending on GitHub by looking for a cached copy of GoogleTest.
+if [[ -r "${KOKORO_GFILE_DIR:-}/distdir/googletest-${ABSL_GOOGLETEST_VERSION}.tar.gz" ]]; then
+  ABSL_GOOGLETEST_DOWNLOAD_URL="file:///distdir/googletest-${ABSL_GOOGLETEST_VERSION}.tar.gz"
+  DOCKER_EXTRA_ARGS="--mount type=bind,source=${KOKORO_GFILE_DIR}/distdir,target=/distdir,readonly ${DOCKER_EXTRA_ARGS:-}"
+fi
+
 if [[ -z ${ABSL_CMAKE_CXX_STANDARDS:-} ]]; then
   ABSL_CMAKE_CXX_STANDARDS="17 20"
 fi

ci/linux_gcc_alpine_cmake.sh

diff --git a/ci/linux_gcc_alpine_cmake.sh b/ci/linux_gcc_alpine_cmake.sh
index 7cf25f7..1d64a95 100755
--- a/ci/linux_gcc_alpine_cmake.sh
+++ b/ci/linux_gcc_alpine_cmake.sh
@@ -22,6 +22,12 @@
 
 source "${ABSEIL_ROOT}/ci/cmake_common.sh"
 
+# Avoid depending on GitHub by looking for a cached copy of GoogleTest.
+if [[ -r "${KOKORO_GFILE_DIR:-}/distdir/googletest-${ABSL_GOOGLETEST_VERSION}.tar.gz" ]]; then
+  ABSL_GOOGLETEST_DOWNLOAD_URL="file:///distdir/googletest-${ABSL_GOOGLETEST_VERSION}.tar.gz"
+  DOCKER_EXTRA_ARGS="--mount type=bind,source=${KOKORO_GFILE_DIR}/distdir,target=/distdir,readonly ${DOCKER_EXTRA_ARGS:-}"
+fi
+
 if [[ -z ${ABSL_CMAKE_CXX_STANDARDS:-} ]]; then
   ABSL_CMAKE_CXX_STANDARDS="17"
 fi

ci/macos_xcode_cmake.sh

diff --git a/ci/macos_xcode_cmake.sh b/ci/macos_xcode_cmake.sh
index 5b11b89..37be939 100755
--- a/ci/macos_xcode_cmake.sh
+++ b/ci/macos_xcode_cmake.sh
@@ -31,6 +31,11 @@
 
 source "${ABSEIL_ROOT}/ci/cmake_common.sh"
 
+# Avoid depending on GitHub by looking for a cached copy of GoogleTest.
+if [[ -r "${KOKORO_GFILE_DIR:-}/distdir/googletest-${ABSL_GOOGLETEST_VERSION}.tar.gz" ]]; then
+  ABSL_GOOGLETEST_DOWNLOAD_URL="${KOKORO_GFILE_DIR}/distdir/googletest-${ABSL_GOOGLETEST_VERSION}.tar.gz"
+fi
+
 if [[ -z ${ABSL_CMAKE_BUILD_TYPES:-} ]]; then
   ABSL_CMAKE_BUILD_TYPES="Debug"
 fi

ci/windows_msvc_cmake.bat

diff --git a/ci/windows_msvc_cmake.bat b/ci/windows_msvc_cmake.bat
index 62cdb70..c0083a1 100755
--- a/ci/windows_msvc_cmake.bat
+++ b/ci/windows_msvc_cmake.bat
@@ -17,7 +17,12 @@
 :: The version of GoogleTest to be used in the CMake tests in this directory.
 :: Keep this in sync with the version in the WORKSPACE file.
 SET ABSL_GOOGLETEST_VERSION=1.17.0
-SET ABSL_GOOGLETEST_DOWNLOAD_URL=https://github.com/google/googletest/releases/download/v%ABSL_GOOGLETEST_VERSION%/googletest-%ABSL_GOOGLETEST_VERSION%.tar.gz
+
+IF EXIST %KOKORO_GFILE_DIR%\distdir\googletest-%ABSL_GOOGLETEST_VERSION%.tar.gz (
+  SET ABSL_GOOGLETEST_DOWNLOAD_URL=file://%KOKORO_GFILE_DIR%\distdir\googletest-%ABSL_GOOGLETEST_VERSION%.tar.gz
+) ELSE (
+  SET ABSL_GOOGLETEST_DOWNLOAD_URL=https://github.com/google/googletest/releases/download/v%ABSL_GOOGLETEST_VERSION%/googletest-%ABSL_GOOGLETEST_VERSION%.tar.gz
+)
 
 :: Replace '\' with '/' in Windows paths for CMake.
 :: Note that this cannot go inside the IF block above, because BAT files are weird.