Migrate to Bzlmod.

Change-Id: I1f656f81468e1fdd1812595aeaf0ed3367caa003
Reviewed-on: https://code-review.googlesource.com/c/re2/+/61670
Reviewed-by: Alex Chernyakhovsky <achernya@google.com>
Reviewed-by: Paul Wankadia <junyer@google.com>

.bazelrc

@@ -2,6 +2,9 @@
 # Use of this source code is governed by a BSD-style
 # license that can be found in the LICENSE file.
 
+# Enable Bzlmod. This will be the default eventually...
+build --enable_bzlmod
+
 # Abseil requires C++14 at minimum.
 # Previously, the flag was set via `BAZEL_CXXOPTS`. On macOS, we also had to set
 # `BAZEL_USE_CPP_ONLY_TOOLCHAIN` since Bazel wouldn't respect the former without

MODULE.bazel

@@ -0,0 +1,24 @@
+# Copyright 2009 The RE2 Authors.  All Rights Reserved.
+# Use of this source code is governed by a BSD-style
+# license that can be found in the LICENSE file.
+
+# Bazel (http://bazel.build/) MODULE file for RE2.
+
+module(
+    name = "re2",
+    version = "2023-08-01",
+    compatibility_level = 11,
+)
+
+bazel_dep(name = "platforms", version = "0.0.7")
+bazel_dep(name = "rules_cc", version = "0.0.8")
+bazel_dep(name = "abseil-cpp", version = "20230125.1", repo_name = "com_google_absl")
+bazel_dep(name = "google_benchmark", version = "1.8.2", repo_name = "com_github_google_benchmark")
+bazel_dep(name = "googletest", version = "1.12.1", repo_name = "com_google_googletest")
+bazel_dep(name = "rules_python", version = "0.24.0")
+bazel_dep(name = "abseil-py", version = "1.4.0", repo_name = "io_abseil_py")
+bazel_dep(name = "pybind11_bazel", version = "2.11.1")
+
+python_configure = use_extension("@pybind11_bazel//:python_configure.bzl", "extension")
+python_configure.toolchain(python_version = "3")  # ignored when non-root module
+use_repo(python_configure, "local_config_python", "pybind11")

WORKSPACE.bazel

@@ -5,61 +5,3 @@
 # Bazel (http://bazel.build/) WORKSPACE file for RE2.
 
 workspace(name = "com_googlesource_code_re2")
-
-load("@bazel_tools//tools/build_defs/repo:http.bzl", "http_archive")
-
-http_archive(
-    name = "com_google_absl",
-    strip_prefix = "abseil-cpp-master",
-    urls = ["https://github.com/abseil/abseil-cpp/archive/master.zip"],
-)
-
-http_archive(
-    name = "bazel_skylib",
-    strip_prefix = "bazel-skylib-main",
-    urls = ["https://github.com/bazelbuild/bazel-skylib/archive/main.zip"],
-)
-
-http_archive(
-    name = "com_github_google_benchmark",
-    strip_prefix = "benchmark-main",
-    urls = ["https://github.com/google/benchmark/archive/main.zip"],
-)
-
-http_archive(
-    name = "com_google_googletest",
-    strip_prefix = "googletest-main",
-    urls = ["https://github.com/google/googletest/archive/main.zip"],
-)
-
-http_archive(
-    name = "rules_python",
-    strip_prefix = "rules_python-main",
-    urls = ["https://github.com/bazelbuild/rules_python/archive/main.zip"],
-)
-
-http_archive(
-    name = "io_abseil_py",
-    strip_prefix = "abseil-py-main",
-    urls = ["https://github.com/abseil/abseil-py/archive/main.zip"],
-)
-
-http_archive(
-    name = "pybind11_bazel",
-    strip_prefix = "pybind11_bazel-master",
-    urls = ["https://github.com/pybind/pybind11_bazel/archive/master.zip"],
-)
-
-http_archive(
-    name = "pybind11",
-    build_file = "@pybind11_bazel//:pybind11.BUILD",
-    strip_prefix = "pybind11-master",
-    urls = ["https://github.com/pybind/pybind11/archive/master.zip"],
-)
-
-load("@pybind11_bazel//:python_configure.bzl", "python_configure")
-
-python_configure(
-    name = "local_config_python",
-    python_version = "3",
-)