Use Bazel vendor mode to cache external dependencies

on Windows and macOS

Also upgrade to Bazel 8.2.1 since all platforms will need
to use the same version of Bazel to get the most cache hits.
Different Bazel versions have different dependencies.

PiperOrigin-RevId: 755477047
Change-Id: Ib8838c6ef1e3b55841005d877346ed8afceca15a

Author: derekmauro

ci/macos_xcode_bazel.sh

@@ -27,19 +27,18 @@ if [[ -z ${ABSEIL_ROOT:-} ]]; then
 fi
 
 # If we are running on Kokoro, check for a versioned Bazel binary.
-KOKORO_GFILE_BAZEL_BIN="bazel-8.0.0-darwin-x86_64"
+KOKORO_GFILE_BAZEL_BIN="bazel-8.2.1-darwin-x86_64"
 if [[ ${KOKORO_GFILE_DIR:-} ]] && [[ -f ${KOKORO_GFILE_DIR}/${KOKORO_GFILE_BAZEL_BIN} ]]; then
   BAZEL_BIN="${KOKORO_GFILE_DIR}/${KOKORO_GFILE_BAZEL_BIN}"
   chmod +x ${BAZEL_BIN}
 else
   BAZEL_BIN="bazel"
 fi
 
-# Avoid depending on external sites like GitHub by checking --distdir for
-# external dependencies first.
-# https://docs.bazel.build/versions/master/guide.html#distdir
-if [[ ${KOKORO_GFILE_DIR:-} ]] && [[ -d "${KOKORO_GFILE_DIR}/distdir" ]]; then
-  BAZEL_EXTRA_ARGS="--distdir=${KOKORO_GFILE_DIR}/distdir ${BAZEL_EXTRA_ARGS:-}"
+# Use Bazel Vendor mode to reduce reliance on external dependencies.
+if [[ ${KOKORO_GFILE_DIR:-} ]] && [[ -f "${KOKORO_GFILE_DIR}/distdir/abseil-cpp_vendor.tar.gz" ]]; then
+  tar -xf "${KOKORO_GFILE_DIR}/distdir/abseil-cpp_vendor.tar.gz" -C "${TMP}/"
+  BAZEL_EXTRA_ARGS="--vendor_dir=\"${TMP}/abseil-cpp_vendor\" ${BAZEL_EXTRA_ARGS:-}"
 fi
 
 # Print the compiler and Bazel versions.

ci/windows_clangcl_bazel.bat

@@ -21,6 +21,14 @@ SET BAZEL_LLVM=C:\Program Files\LLVM
 CD %~dp0\..
 if %errorlevel% neq 0 EXIT /B 1
 
+:: Use Bazel Vendor mode to reduce reliance on external dependencies.
+IF EXIST "%KOKORO_GFILE_DIR%\distdir\abseil-cpp_vendor.tar.gz" (
+  tar --force-local -xf "%KOKORO_GFILE_DIR%\distdir\abseil-cpp_vendor.tar.gz" -C c:\
+  SET VENDOR_FLAG=--vendor_dir=c:\abseil-cpp_vendor
+) ELSE (
+  SET VENDOR_FLAG=
+)
+
 :: Set the standard version, [c++17|c++20|c++latest]
 :: https://msdn.microsoft.com/en-us/library/mt490614.aspx
 :: The default is c++17 if not set on command line.
@@ -39,23 +47,23 @@ IF NOT "%ALTERNATE_OPTIONS%"=="" copy %ALTERNATE_OPTIONS% absl\base\options.h
 :: /google/data/rw/teams/absl/kokoro/windows.
 ::
 :: TODO(absl-team): Remove -Wno-microsoft-cast
-%KOKORO_GFILE_DIR%\bazel-8.0.0-windows-x86_64.exe ^
+%KOKORO_GFILE_DIR%\bazel-8.2.1-windows-x86_64.exe ^
   test ... ^
   --compilation_mode=%COMPILATION_MODE% ^
   --compiler=clang-cl ^
   --copt=/WX ^
   --copt=-Wno-microsoft-cast ^
   --cxxopt=/std:%STD% ^
   --define=absl=1 ^
-  --distdir=%KOKORO_GFILE_DIR%\distdir ^
   --enable_bzlmod=true ^
   --extra_execution_platforms=//:x64_windows-clang-cl ^
   --extra_toolchains=@local_config_cc//:cc-toolchain-x64_windows-clang-cl ^
   --keep_going ^
   --test_env="GTEST_INSTALL_FAILURE_SIGNAL_HANDLER=1" ^
   --test_env=TZDIR="%CD%\absl\time\internal\cctz\testdata\zoneinfo" ^
   --test_output=errors ^
-  --test_tag_filters=-benchmark
+  --test_tag_filters=-benchmark ^
+  %VENDOR_FLAG%
 
 if %errorlevel% neq 0 EXIT /B 1
 EXIT /B 0

ci/windows_msvc_bazel.bat

@@ -18,6 +18,14 @@ SETLOCAL ENABLEDELAYEDEXPANSION
 CD %~dp0\..
 if %errorlevel% neq 0 EXIT /B 1
 
+:: Use Bazel Vendor mode to reduce reliance on external dependencies.
+IF EXIST "%KOKORO_GFILE_DIR%\distdir\abseil-cpp_vendor.tar.gz" (
+  tar --force-local -xf "%KOKORO_GFILE_DIR%\distdir\abseil-cpp_vendor.tar.gz" -C c:\
+  SET VENDOR_FLAG=--vendor_dir=c:\abseil-cpp_vendor
+) ELSE (
+  SET VENDOR_FLAG=
+)
+
 :: Set the standard version, [c++17|c++latest]
 :: https://msdn.microsoft.com/en-us/library/mt490614.aspx
 :: The default is c++17 if not set on command line.
@@ -34,19 +42,19 @@ IF NOT "%ALTERNATE_OPTIONS%"=="" copy %ALTERNATE_OPTIONS% absl\base\options.h
 :: To upgrade Bazel, first download a new binary from
 :: https://github.com/bazelbuild/bazel/releases and copy it to
 :: /google/data/rw/teams/absl/kokoro/windows.
-%KOKORO_GFILE_DIR%\bazel-8.0.0-windows-x86_64.exe ^
+"%KOKORO_GFILE_DIR%\bazel-8.2.1-windows-x86_64.exe" ^
   test ... ^
   --compilation_mode=%COMPILATION_MODE% ^
   --copt=/WX ^
   --copt=/std:%STD% ^
   --define=absl=1 ^
-  --distdir=%KOKORO_GFILE_DIR%\distdir ^
   --enable_bzlmod=true ^
   --keep_going ^
   --test_env="GTEST_INSTALL_FAILURE_SIGNAL_HANDLER=1" ^
   --test_env=TZDIR="%CD%\absl\time\internal\cctz\testdata\zoneinfo" ^
   --test_output=errors ^
-  --test_tag_filters=-benchmark
+  --test_tag_filters=-benchmark ^
+  %VENDOR_FLAG%
 
 if %errorlevel% neq 0 EXIT /B 1
 EXIT /B 0