Add support for Bazel modules. (proxy-wasm#333)

Signed-off-by: Matthieu MOREL <matthieu.morel35@gmail.com>

Author: mmorel-35

.bazelrc

@@ -1,5 +1,2 @@
-# Disable Bzlmod
-common --noenable_bzlmod
-
 # Force Bazel to use --target=wasm32-wasip1
 build --platforms=@rules_rust//rust/platform:wasi

.github/workflows/rust.yml

@@ -87,9 +87,15 @@ jobs:
     - name: Build (wasm32-unknown-unknown)
       run: bazelisk --noworkspace_rc build --noenable_bzlmod --platforms=@rules_rust//rust/platform:wasm //...
 
+    - name: Build (wasm32-unknown-unknown/bzlmod)
+      run: bazelisk --noworkspace_rc build --enable_bzlmod --platforms=@rules_rust//rust/platform:wasm //...
+
     - name: Build (wasm32-wasip1)
       run: bazelisk --noworkspace_rc build --noenable_bzlmod --platforms=@rules_rust//rust/platform:wasi //...
 
+    - name: Build (wasm32-wasip1/bzlmod)
+      run: bazelisk --noworkspace_rc build --enable_bzlmod --platforms=@rules_rust//rust/platform:wasi //...
+
     - name: Format (buildifier)
       run: |
         buildifier -mode=check -r .
@@ -99,6 +105,9 @@ jobs:
         bazelisk --noworkspace_rc run --noenable_bzlmod //bazel/cargo:crates_vendor
         git diff --exit-code
 
+    - name: Format (MODULE.bazel.lock)
+      run: bazelisk mod deps --lockfile_mode=error
+
   msrv:
     runs-on: ubuntu-24.04
 

MODULE.bazel

@@ -0,0 +1,56 @@
+# Copyright 2025 Google LLC
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+module(
+    name = "proxy_wasm_rust_sdk",
+    version = "0.2.5-dev",
+)
+
+# Regular dependencies (sorted alphabetically).
+bazel_dep(name = "bazel_features", version = "1.38.0")
+bazel_dep(name = "bazel_skylib", version = "1.8.2")
+bazel_dep(name = "rules_cc", version = "0.2.14")
+bazel_dep(name = "rules_rust", version = "0.67.0")
+single_version_override(
+    module_name = "rules_rust",
+    patch_strip = 1,
+    patches = [
+        "//bazel:rules_rust.patch",
+    ],
+    version = "0.67.0",
+)
+
+# Configure Rust toolchain.
+rust = use_extension("@rules_rust//rust:extensions.bzl", "rust")
+rust.toolchain(
+    edition = "2018",
+    versions = ["1.90.0"],
+)
+use_repo(rust, "rust_toolchains")
+
+register_toolchains(
+    "@rust_toolchains//:all",
+    # Dummy C/C++ toolchains for Wasm targets.
+    "@rules_rust//rust/private/dummy_cc_toolchain:dummy_cc_wasm32_toolchain",
+    "@rules_rust//rust/private/dummy_cc_toolchain:dummy_cc_wasm64_toolchain",
+)
+
+# Cargo dependencies.
+crates_deps = use_extension("//bazel:extensions.bzl", "crates_deps")
+use_repo(
+    crates_deps,
+    "crates_vendor",
+    "crates_vendor__hashbrown-0.16.0",
+    "crates_vendor__log-0.4.27",
+)