feat(rules_dart): first-class Bazel ruleset with RBE, IDE aspects, and version conflict detection (#512)

* feat(rules_dart): more features to support independence

* refactor(rules_dart): modularize

* feat: workers

* feat: more features and proto

Author: yesudeep

.bazelrc

@@ -13,6 +13,7 @@ import %workspace%/ts.bazelrc
 import %workspace%/java.bazelrc
 import %workspace%/rust.bazelrc
 import %workspace%/python.bazelrc
+import %workspace%/dart.bazelrc
 
 # Allow user overrides. This should be the very last line and this file should
 # be in .gitignore.

.github/workflows/dart.yml

@@ -131,7 +131,7 @@ jobs:
         uses: actions/checkout@v6
 
       - name: Setup Bazel
-        uses: bazel-contrib/setup-bazel@0.14.0
+        uses: bazel-contrib/setup-bazel@0.18.0
         with:
           bazelisk-cache: true
           disk-cache: ${{ github.workflow }}
@@ -141,7 +141,7 @@ jobs:
         run: bazel build //dart/...
 
       - name: Run Dart tests via Bazel
-        run: bazel test //dart/dotprompt/test:... --test_output=errors
+        run: bazel test //dart/... --test_output=errors
         continue-on-error: true  # Tests may need network access
 
   antlr-grammar:

.github/workflows/rules_dart.yml

@@ -0,0 +1,61 @@
+# Copyright 2026 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.
+#
+# SPDX-License-Identifier: Apache-2.0
+
+name: Rules Dart Tests
+
+on:
+  push:
+    branches: [ main ]
+    paths:
+      - 'bazel/rules_dart/**'
+      - '.github/workflows/rules_dart.yml'
+  pull_request:
+    branches: [ main ]
+    paths:
+      - 'bazel/rules_dart/**'
+      - '.github/workflows/rules_dart.yml'
+  workflow_dispatch:
+
+jobs:
+  smoke_test:
+    name: Smoke Test
+    strategy:
+      matrix:
+        os: [ubuntu-latest, macos-latest, windows-latest]
+    runs-on: ${{ matrix.os }}
+    defaults:
+      run:
+        shell: bash
+    
+    steps:
+      - uses: actions/checkout@v4
+      
+      - name: Setup Bazel
+        uses: bazel-contrib/setup-bazel@0.18.0
+        with:
+          bazelisk-cache: true
+          disk-cache: ${{ github.workflow }}-${{ matrix.os }}
+          repository-cache: true
+          cache-save: true
+          
+      - name: Run Smoke Tests (Unix)
+        if: runner.os != 'Windows'
+        run: ./bazel/rules_dart/scripts/test_examples.sh
+
+      - name: Run Smoke Tests (Windows)
+        if: runner.os == 'Windows'
+        shell: cmd
+        run: bazel\rules_dart\scripts\test_examples.bat

BUILD.bazel

@@ -38,3 +38,5 @@ npm_link_package(
 # This macro expands to a npm_link_package for each of the dependencies in
 # package.json.
 npm_link_all_packages(name = "node_modules")
+
+exports_files(["MODULE.bazel"])

MODULE.bazel

@@ -24,9 +24,11 @@ module(
 bazel_dep(name = "bazel_skylib", version = "1.8.2")
 bazel_dep(name = "gazelle", version = "0.47.0")
 bazel_dep(name = "platforms", version = "1.0.0")
-
 bazel_dep(name = "rules_dart", version = "0.0.1")
-local_path_override(module_name = "rules_dart", path = "bazel/rules_dart")
+local_path_override(
+    module_name = "rules_dart",
+    path = "bazel/rules_dart",
+)
 
 include("//:dart.MODULE.bazel")
 include("//:go.MODULE.bazel")

MODULE.bazel.lock

@@ -133,7 +133,7 @@ chmod +x $@
             DART_SDK,
             "//dart/dotprompt:dotprompt",
             "//dart/dotprompt:pubspec.yaml",
-            "//dart/dotprompt/test:spec_test.dart",
+            "//dart/dotprompt:test/spec_test.dart",
             # Include handlebarrz as it's a path dependency
             "//dart/handlebarrz:handlebarrz",
             "//dart/handlebarrz:pubspec.yaml",

bazel/dart/defs.bzl

@@ -17,7 +17,20 @@
 """Custom Bazel rules for Dart language support."""
 
 exports_files([
+    "aspects.bzl",
+    "build_runner.bzl",
     "defs.bzl",
+    "deps.bzl",
     "extensions.bzl",
+    "proto.bzl",
+    "rbe.bazelrc",
     "repositories.bzl",
+    "toolchain.bzl",
 ])
+
+# Toolchain type for Dart
+# Rules use this to request a Dart toolchain via ctx.toolchains
+toolchain_type(
+    name = "toolchain_type",
+    visibility = ["//visibility:public"],
+)

bazel/rules_dart/BUILD.bazel

@@ -0,0 +1,5 @@
+# Code of Conduct
+
+This project follows [Google's Open Source Community Guidelines](https://opensource.google/conduct/).
+
+We are committed to maintaining a community that satisfies these guidelines.