formatting: Add rustfmt

MODULE.bazel

@@ -25,6 +25,7 @@ bazel_dep(name = "aspect_rules_py", version = "1.4.0")
 bazel_dep(name = "aspect_rules_lint", version = "1.5.3")
 bazel_dep(name = "rules_shell", version = "0.5.0")
 bazel_dep(name = "rules_java", version = "8.15.1")
+bazel_dep(name = "rules_rust", version = "0.61.0")
 bazel_dep(name = "rules_multitool", version = "1.9.0")
 
 bazel_dep(name = "bazel_skylib", version = "1.7.1", dev_dependency = True)

format_checker/README.md

@@ -1,15 +1,13 @@
 
 # Source Format Targets for Bazel Projects
 
-This module provides reusable Bazel macros for formatting **Starlark**, **Python** and **YAML** files 
-using [`aspect-build/rules_lint`](https://github.com/aspect-build/rules_lint) and `buildifier`. It enables 
-consistent formatting enforcement across Bazel-based projects.
+This module provides reusable Bazel macros for formatting **Starlark**, **Python**, **YAML**, and **Rust** files using [`aspect-build/rules_lint`](https://github.com/aspect-build/rules_lint) and `buildifier`. By default Rust formatting uses the `@rules_rust//tools/upstream_wrapper:rustfmt` binary.
 
 ---
 
 ## Features
 
-- ✅ Supports Python (`ruff`), YAML (`yamlfmt`) and Starlark (`buildifier`)
+- ✅ Supports Python (`ruff`), YAML (`yamlfmt`), Starlark (`buildifier`) and Rust (via `@rules_rust` upstream wrapper by default)
 - ✅ Provides `format.fix` and `format.check` targets
 - ✅ Simple macro-based usage for local formatting scope
 - ✅ Centralized logic without Bazel module extensions
@@ -19,9 +17,8 @@ consistent formatting enforcement across Bazel-based projects.
 ## Directory Structure
 
 ```bash
-├── BUILD.bazel               
-├── MODULE.bazel              # Bazel module declaration with deps
-├── macros.bzl                # Contains the reusable macro
+├── BUILD.bazel
+├── macros.bzl
 └── README.md
 ```
 
@@ -89,10 +86,16 @@ This will register two Bazel targets:
 
 ---
 
+## Rust support
+
+- Default formatter label: `@rules_rust//tools/upstream_wrapper:rustfmt`.
+
+---
+
 ## Benefits
 
-✅ Centralized formatting config with local file scope  
-✅ Consistent developer experience across repositories  
+✅ Centralized formatting config with local file scope
+✅ Consistent developer experience across repositories
 ✅ Easily pluggable in CI pipelines or Git pre-commit hooks
 
----
+---

format_checker/macros.bzl

@@ -16,6 +16,7 @@ def use_format_targets(fix_name = "format.fix", check_name = "format.check"):
     format_multirun(
         name = fix_name,
         python = "@aspect_rules_lint//format:ruff",
+        rust = "@rules_rust//tools/upstream_wrapper:rustfmt",
         starlark = "@buildifier_prebuilt//:buildifier",
         yaml = "@aspect_rules_lint//format:yamlfmt",
         visibility = ["//visibility:public"],
@@ -25,6 +26,7 @@ def use_format_targets(fix_name = "format.fix", check_name = "format.check"):
         name = check_name,
         no_sandbox = True,
         python = "@aspect_rules_lint//format:ruff",
+        rust = "@rules_rust//tools/upstream_wrapper:rustfmt",
         starlark = "@buildifier_prebuilt//:buildifier",
         yaml = "@aspect_rules_lint//format:yamlfmt",
         workspace = "//:MODULE.bazel",

tools/sample.sh

@@ -1,3 +1,4 @@
+#!/usr/bin/env bash
 # *******************************************************************************
 # Copyright (c) 2025 Contributors to the Eclipse Foundation
 #
@@ -10,7 +11,6 @@
 #
 # SPDX-License-Identifier: Apache-2.0
 # *******************************************************************************
-#!/usr/bin/env bash
 set -euo pipefail
 
 bazel run //docs:ide_support