Add support for Bzlmod for the next release

https://bazel.build/external/overview#bzlmod

Bzlmod will be the default in a future Bazel release.
By default it requires projects to be registered with the
Bazel Central Registry (https://registry.bazel.build/) and
thus uses regular releases by default.

Users that want to "live-at-head" can still do this through
with overrides (https://bazel.build/external/module#overrides).

This change updates GoogleTest dependencies to use released versions.
CI uses Bzlmod except in the case of linux_gcc-floor, which will
keep testing the old WORKSPACE-based dependency system.

PiperOrigin-RevId: 601489729
Change-Id: I6be52034eba0d0e5fe12110e5e82879305cf73ff

.gitignore

@@ -8,6 +8,7 @@ bazel-genfiles
 bazel-googletest
 bazel-out
 bazel-testlogs
+MODULE.bazel.lock
 # python
 *.pyc
 

MODULE.bazel

@@ -0,0 +1,57 @@
+# Copyright 2024 Google Inc.
+# All Rights Reserved.
+#
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions are
+# met:
+#
+#     * Redistributions of source code must retain the above copyright
+# notice, this list of conditions and the following disclaimer.
+#     * Redistributions in binary form must reproduce the above
+# copyright notice, this list of conditions and the following disclaimer
+# in the documentation and/or other materials provided with the
+# distribution.
+#     * Neither the name of Google Inc. nor the names of its
+# contributors may be used to endorse or promote products derived from
+# this software without specific prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+# https://bazel.build/external/overview#bzlmod
+
+module(
+    name = "googletest",
+    version = "head",
+    compatibility_level = 1,
+)
+
+# Only direct dependencies need to be listed below.
+# Please keep the versions in sync with the versions in the WORKSPACE file.
+
+bazel_dep(name = "abseil-cpp",
+          version = "20240116.0",
+          repo_name = "com_google_absl")
+
+bazel_dep(name = "platforms",
+          version = "0.0.8")
+
+bazel_dep(name = "re2",
+          repo_name = "com_googlesource_code_re2",
+          version = "2023-11-01")
+
+bazel_dep(name = "rules_python",
+          version = "0.29.0")
+
+# https://github.com/bazelbuild/rules_python/blob/main/BZLMOD_SUPPORT.md#default-toolchain-is-not-the-local-system-python
+register_toolchains("@bazel_tools//tools/python:autodetecting_toolchain")

WORKSPACE

@@ -6,22 +6,24 @@ googletest_deps()
 load("@bazel_tools//tools/build_defs/repo:http.bzl", "http_archive")
 
 http_archive(
-  name = "rules_python",  # 2023-07-31T20:39:27Z
+  name = "rules_python",
-  sha256 = "1250b59a33c591a1c4ba68c62e95fc88a84c334ec35a2e23f46cbc1b9a5a8b55",
+  sha256 = "d71d2c67e0bce986e1c5a7731b4693226867c45bfe0b7c5e0067228a536fc580",
-  strip_prefix = "rules_python-e355becc30275939d87116a4ec83dad4bb50d9e1",
+  strip_prefix = "rules_python-0.29.0",
-  urls = ["https://github.com/bazelbuild/rules_python/archive/e355becc30275939d87116a4ec83dad4bb50d9e1.zip"],
+  urls = ["https://github.com/bazelbuild/rules_python/releases/download/0.29.0/rules_python-0.29.0.tar.gz"],
+)
+
+# https://github.com/bazelbuild/rules_python/releases/tag/0.29.0
+load("@rules_python//python:repositories.bzl", "py_repositories")
+py_repositories()
+
+http_archive(
+  name = "bazel_skylib",
+  sha256 = "cd55a062e763b9349921f0f5db8c3933288dc8ba4f76dd9416aac68acee3cb94",
+  urls = ["https://github.com/bazelbuild/bazel-skylib/releases/download/1.5.0/bazel-skylib-1.5.0.tar.gz"],
 )
 
 http_archive(
-  name = "bazel_skylib",  # 2023-05-31T19:24:07Z
+    name = "platforms",
-  sha256 = "08c0386f45821ce246bbbf77503c973246ed6ee5c3463e41efc197fa9bc3a7f4",
+    sha256 = "8150406605389ececb6da07cbcb509d5637a3ab9a24bc69b1101531367d89d74",
-  strip_prefix = "bazel-skylib-288731ef9f7f688932bd50e704a91a45ec185f9b",
+    urls = ["https://github.com/bazelbuild/platforms/releases/download/0.0.8/platforms-0.0.8.tar.gz"],
-  urls = ["https://github.com/bazelbuild/bazel-skylib/archive/288731ef9f7f688932bd50e704a91a45ec185f9b.zip"],
-)
-
-http_archive(
-  name = "platforms",  # 2023-07-28T19:44:27Z
-  sha256 = "40eb313613ff00a5c03eed20aba58890046f4d38dec7344f00bb9a8867853526",
-  strip_prefix = "platforms-4ad40ef271da8176d4fc0194d2089b8a76e19d7b",
-  urls = ["https://github.com/bazelbuild/platforms/archive/4ad40ef271da8176d4fc0194d2089b8a76e19d7b.zip"],
 )

WORKSPACE.bzlmod

@@ -0,0 +1,35 @@
+# Copyright 2024 Google Inc.
+# All Rights Reserved.
+#
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions are
+# met:
+#
+#     * Redistributions of source code must retain the above copyright
+# notice, this list of conditions and the following disclaimer.
+#     * Redistributions in binary form must reproduce the above
+# copyright notice, this list of conditions and the following disclaimer
+# in the documentation and/or other materials provided with the
+# distribution.
+#     * Neither the name of Google Inc. nor the names of its
+# contributors may be used to endorse or promote products derived from
+# this software without specific prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+# https://bazel.build/external/migration#workspace.bzlmod
+#
+# This file is intentionally empty. When bzlmod is enabled and this
+# file exists, the content of WORKSPACE is ignored. This prevents
+# bzlmod builds from unintentionally depending on the WORKSPACE file.

ci/linux-presubmit.sh

@@ -67,6 +67,9 @@ for cc in /usr/local/bin/gcc /opt/llvm/clang/bin/clang; do
 done
 
 # Do one test with an older version of GCC
+# TODO(googletest-team): This currently uses Bazel 5. When upgrading to a
+# version of Bazel that supports Bzlmod, add --enable_bzlmod=false to keep test
+# coverage for the old WORKSPACE dependency management.
 time docker run \
   --volume="${GTEST_ROOT}:/src:ro" \
   --workdir="/src" \
@@ -101,7 +104,7 @@ for std in ${STD}; do
         --copt="-Wuninitialized" \
         --copt="-Wundef" \
         --define="absl=${absl}" \
-        --enable_bzlmod=false \
+        --enable_bzlmod=true \
         --features=external_include_paths \
         --keep_going \
         --show_timestamps \
@@ -126,7 +129,7 @@ for std in ${STD}; do
         --copt="-Wuninitialized" \
         --copt="-Wundef" \
         --define="absl=${absl}" \
-        --enable_bzlmod=false \
+        --enable_bzlmod=true \
         --features=external_include_paths \
         --keep_going \
         --linkopt="--gcc-toolchain=/usr/local" \

ci/macos-presubmit.sh

@@ -69,6 +69,7 @@ for absl in 0 1; do
     --copt="-Wundef" \
     --cxxopt="-std=c++14" \
     --define="absl=${absl}" \
+    --enable_bzlmod=true \
     --features=external_include_paths \
     --keep_going \
     --show_timestamps \

ci/windows-presubmit.bat

@@ -51,6 +51,7 @@ SET BAZEL_VS=C:\Program Files\Microsoft Visual Studio\2022\Community
   --compilation_mode=dbg ^
   --copt=/std:c++14 ^
   --copt=/WX ^
+  --enable_bzlmod=true ^
   --keep_going ^
   --test_output=errors ^
   --test_tag_filters=-no_test_msvc2017

googletest_deps.bzl

@@ -7,16 +7,16 @@ def googletest_deps():
 
     if not native.existing_rule("com_googlesource_code_re2"):
         http_archive(
-            name = "com_googlesource_code_re2",  # 2023-03-17T11:36:51Z
+            name = "com_googlesource_code_re2",
-            sha256 = "cb8b5312a65f2598954545a76e8bce913f35fbb3a21a5c88797a4448e9f9b9d9",
+            sha256 = "828341ad08524618a626167bd320b0c2acc97bd1c28eff693a9ea33a7ed2a85f",
-            strip_prefix = "re2-578843a516fd1da7084ae46209a75f3613b6065e",
+            strip_prefix = "re2-2023-11-01",
-            urls = ["https://github.com/google/re2/archive/578843a516fd1da7084ae46209a75f3613b6065e.zip"],
+            urls = ["https://github.com/google/re2/releases/download/2023-11-01/re2-2023-11-01.zip"],
         )
 
     if not native.existing_rule("com_google_absl"):
         http_archive(
-            name = "com_google_absl",  # 2023-09-13T14:58:42Z
+            name = "com_google_absl",
-            sha256 = "7766815ef6293dc7bca58fef59a96d7d3230874412dcd36dafb0e313ed1356f2",
+            sha256 = "338420448b140f0dfd1a1ea3c3ce71b3bc172071f24f4d9a57d59b45037da440",
-            strip_prefix = "abseil-cpp-9e1789ffea47fdeb3133aa42aa9592f3673fb6ed",
+            strip_prefix = "abseil-cpp-20240116.0",
-            urls = ["https://github.com/abseil/abseil-cpp/archive/9e1789ffea47fdeb3133aa42aa9592f3673fb6ed.zip"],
+            urls = ["https://github.com/abseil/abseil-cpp/releases/download/20240116.0/abseil-cpp-20240116.0.tar.gz"],
         )