Migrate to Bzlmod.

This drops unmaintained Gradle support.

.bazelrc

@@ -0,0 +1,3 @@
+common --enable_bzlmod
+common --registry=https://raw.githubusercontent.com/SanjayVas/bazel-registry/main/
+common --registry=https://bcr.bazel.build

.bazelversion

@@ -0,0 +1 @@
+6.4.0

MODULE.bazel

@@ -0,0 +1,25 @@
+module(
+    name = "cross-media-measurement-api",
+    repo_name = "wfa_measurement_proto",
+)
+
+# Bazel Central Registry deps.
+bazel_dep(
+    name = "rules_proto",
+    version = "5.3.0-21.7",
+)
+bazel_dep(
+    name = "protobuf",
+    version = "21.7",
+    repo_name = "com_google_protobuf",
+)
+
+# WFA registry deps.
+bazel_dep(
+    name = "googleapis",
+    version = "0.0.0-bzlmod.1",
+    repo_name = "com_google_googleapis",
+)
+
+non_module_deps = use_extension("//build:non_module_deps.bzl", "non_module_deps")
+use_repo(non_module_deps, "plantuml")

WORKSPACE

@@ -1,18 +1,4 @@
-workspace(name = "wfa_measurement_proto")
-
-load("//build:repositories.bzl", "wfa_measurement_proto_repositories")
-
-wfa_measurement_proto_repositories()
-
-load("//build:deps.bzl", "wfa_measurement_proto_deps")
+# This file marks the root of the Bazel workspace.
+# See MODULE.bazel for external dependencies setup.
 
-wfa_measurement_proto_deps()
-
-load("@bazel_tools//tools/build_defs/repo:http.bzl", "http_file")
-
-http_file(
-    name = "plantuml",
-    downloaded_file_path = "plantuml.jar",
-    sha256 = "3a659c3d87ea5ebac7aadb645233176c51d0290777ebc28285dd2a35dc947752",
-    urls = ["https://github.com/plantuml/plantuml/releases/download/v1.2023.4/plantuml-1.2023.4.jar"],
-)
+workspace(name = "wfa_measurement_proto")

build/deps.bzl → build/non_module_deps.bzl

@@ -12,22 +12,18 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-"""Transitive dependencies for this workspace."""
+"""Module extension for non-module dependencies."""
 
-load(
-    "@rules_proto//proto:repositories.bzl",
-    "rules_proto_dependencies",
-    "rules_proto_toolchains",
-)
-load(
-    "@com_google_googleapis//:repository_rules.bzl",
-    "switched_rules_by_language",
-)
+load("@bazel_tools//tools/build_defs/repo:http.bzl", "http_file")
 
-def wfa_measurement_proto_deps():
-    rules_proto_dependencies()
-    rules_proto_toolchains()
-
-    switched_rules_by_language(
-        name = "com_google_googleapis_imports",
+def _non_module_deps_impl(
+        # buildifier: disable=unused-variable
+        mctx):
+    http_file(
+        name = "plantuml",
+        downloaded_file_path = "plantuml.jar",
+        sha256 = "3a659c3d87ea5ebac7aadb645233176c51d0290777ebc28285dd2a35dc947752",
+        urls = ["https://github.com/plantuml/plantuml/releases/download/v1.2023.4/plantuml-1.2023.4.jar"],
     )
+
+non_module_deps = module_extension(implementation = _non_module_deps_impl)