Start a dev/checks_tool directory. (#170493)

Towards https://github.com/flutter/flutter/issues/170491.

dev/bots/analyze.dart

@@ -2677,6 +2677,7 @@ const Set<String> kExecutableAllowlist = <String>{
   'dev/bots/codelabs_build_test.sh',
   'dev/bots/docs.sh',
 
+  'dev/checks',
   'dev/conductor/bin/conductor',
   'dev/conductor/bin/packages_autoroller',
   'dev/conductor/core/lib/src/proto/compile_proto.sh',

dev/checks

@@ -0,0 +1,25 @@
+#!/usr/bin/env bash
+# Copyright 2014 The Flutter Authors. All rights reserved.
+# Use of this source code is governed by a BSD-style license that can be
+# found in the LICENSE file.
+
+set -e
+
+# Needed because if it is set, cd may print the path it changed to.
+unset CDPATH
+
+# Lookup the parent directory of the script (../), the Flutter SDK root.
+PROG_NAME="${BASH_SOURCE[0]}"
+DEV_DIR="$(
+  cd "${PROG_NAME%/*}"
+  pwd -P
+)"
+FLUTTER_ROOT="$(
+  cd "$DEV_DIR/.."
+  pwd -P
+)"
+
+# Run the tool.
+pushd "$FLUTTER_ROOT/dev/checks_tool" >/dev/null
+dart run --resident --quiet bin/checks.dart
+popd >/dev/null

dev/checks_tool/README.md

@@ -0,0 +1,14 @@
+# Flutter Repository Checks
+
+Repository-wide (excluding `engine/**`) analysis and code health checks.
+
+This directory is an experimental project to modularize the code that lives
+today in [`dev/bots/analyze.dart`](../bots/analyze.dart), and make it fast
+enough (and compatible with) an optional git-commit hook. If you have any
+questions or concerns, see [#170491](https://github.com/flutter/flutter/issues/170491).
+
+## Usage
+
+```sh
+./dev/checks
+```

dev/checks_tool/analysis_options.yaml

@@ -0,0 +1 @@
+include: ../../analysis_options.yaml

dev/checks_tool/bin/checks.dart

@@ -0,0 +1,9 @@
+// Copyright 2014 The Flutter Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+import 'dart:io' as io;
+
+void main(List<String> args) {
+  io.stdout.writeln('Hello World');
+}

dev/checks_tool/pubspec.yaml

@@ -0,0 +1,14 @@
+name: checks_tool
+
+environment:
+  sdk: ^3.7.0-0
+
+resolution: workspace
+
+dependencies:
+  args: any
+
+dev_dependencies:
+  test: any
+
+# PUBSPEC CHECKSUM: foei0u

pubspec.yaml

@@ -16,6 +16,7 @@ workspace:
   - packages/fuchsia_remote_debug_protocol
   - packages/flutter_web_plugins
   - packages/flutter_goldens
+  - dev/checks_tool
   - dev/devicelab
   - dev/manual_tests
   - dev/tracing_tests