add builder script to compile protos into Dart

mediapipe/dart/dart_builder/.gitignore

@@ -0,0 +1,3 @@
+# https://dart.dev/guides/libraries/private-files
+# Created by `dart pub`
+.dart_tool/

mediapipe/dart/dart_builder/CHANGELOG.md

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+## 1.0.0
+
+- Initial version.

mediapipe/dart/dart_builder/README.md

@@ -0,0 +1,2 @@
+A sample command-line application with an entrypoint in `bin/`, library code
+in `lib/`, and example unit test in `test/`.

mediapipe/dart/dart_builder/analysis_options.yaml

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+# This file configures the static analysis results for your project (errors,
+# warnings, and lints).
+#
+# This enables the 'recommended' set of lints from `package:lints`.
+# This set helps identify many issues that may lead to problems when running
+# or consuming Dart code, and enforces writing Dart using a single, idiomatic
+# style and format.
+#
+# If you want a smaller set of lints you can change this to specify
+# 'package:lints/core.yaml'. These are just the most critical lints
+# (the recommended set includes the core lints).
+# The core lints are also what is used by pub.dev for scoring packages.
+
+include: package:lints/recommended.yaml
+
+# Uncomment the following section to specify additional rules.
+
+# linter:
+#   rules:
+#     - camel_case_types
+
+# analyzer:
+#   exclude:
+#     - path/to/excluded/files/**
+
+# For more information about the core and recommended set of lints, see
+# https://dart.dev/go/core-lints
+
+# For additional information about configuring this file, see
+# https://dart.dev/guides/language/analysis-options

mediapipe/dart/dart_builder/bin/dart_builder.dart

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+import 'package:args/args.dart';
+import 'package:dart_builder/dart_builder.dart' as db;
+
+final argParser = ArgParser()
+  ..addOption(
+    'protoc',
+    help: 'Override the path to protoc',
+  )
+  ..addOption(
+    'protobuf',
+    help: 'Supply a path to google/protobuf if it is not '
+        'next to google/mediapipe',
+  )
+  ..addOption('output', abbr: 'o');
+
+Future<void> main(List<String> arguments) async {
+  final results = argParser.parse(arguments);
+  final options = db.DartProtoBuilderOptions(
+    protocPath: results['protoc'],
+    protobufPath: results['protobuf'],
+    outputPath: results['output'],
+  );
+
+  final protoBuilder = db.DartProtoBuilder(options);
+  await protoBuilder.run();
+}

mediapipe/dart/dart_builder/lib/commands.dart

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+import 'dart:io' as io;
+import 'package:io/ansi.dart' as ansi;
+
+class Command {
+  Command(
+    this.arguments, {
+    this.stdOutHandler,
+    this.stdErrHandler,
+    this.workingDirectory,
+    bool? debug,
+  })  : assert(arguments.isNotEmpty),
+        _debug = debug ?? false;
+
+  final bool _debug;
+  final String? workingDirectory;
+  final List<String> arguments;
+  void Function(String)? stdOutHandler;
+  void Function(String)? stdErrHandler;
+
+  io.ProcessResult? _result;
+
+  /// Runs a command and scans its stdout contents for a given needle.
+  /// If the needle is found, the command is considered to have completed
+  /// successfully.
+  factory Command.needleInOutput(
+    List<String> arguments, {
+    required String needle,
+    List<String> ifMissing = const <String>[],
+    bool shouldExitIfMissing = true,
+  }) {
+    return Command(
+      arguments,
+      stdOutHandler: (String output) {
+        bool foundNeedle = false;
+        bool contains(String line) => line.contains(needle);
+        if (output.split('\n').any(contains)) {
+          foundNeedle = true;
+        }
+        if (!foundNeedle) {
+          for (String line in ifMissing) {
+            io.stderr.writeln(ansi.wrapWith(line, [ansi.red]));
+          }
+          if (shouldExitIfMissing) {
+            io.exit(1);
+          }
+        }
+      },
+    );
+  }
+
+  factory Command.which(
+    String commandName, {
+    String? documentationUrl,
+    bool shouldExitIfMissing = true,
+  }) {
+    return Command(
+      ['which', commandName],
+      stdOutHandler: (String output) {
+        if (output.isEmpty) {
+          io.stderr.writeAll([
+            ansi.wrapWith(
+              '$commandName not installed or not on path\n',
+              [ansi.red],
+            ),
+            if (documentationUrl != null)
+              ansi.wrapWith(
+                'Visit $documentationUrl for installation instructions\n',
+                [ansi.red],
+              ),
+          ]);
+          if (shouldExitIfMissing) {
+            io.exit(1);
+          }
+        }
+      },
+    );
+  }
+
+  factory Command.run(
+    List<String> command, {
+    bool? debug,
+    String? workingDirectory,
+  }) =>
+      Command(
+        command,
+        stdOutHandler: (String output) =>
+            output.trim().isNotEmpty ? io.stdout.writeln(output.trim()) : null,
+        stdErrHandler: (String output) =>
+            output.trim().isNotEmpty ? io.stderr.writeln(output.trim()) : null,
+        debug: debug,
+        workingDirectory: workingDirectory,
+      );
+
+  Future<void> run() async {
+    if (_debug) {
+      io.stdout.writeln('>>> ${arguments.join(' ')}');
+    }
+    _result = await io.Process.run(
+      arguments.first,
+      arguments.sublist(1),
+      workingDirectory: workingDirectory,
+    );
+    stdOutHandler?.call(_result!.stdout);
+    stdErrHandler?.call(_result!.stderr);
+  }
+
+  int? get exitCode => _result?.exitCode;
+}

mediapipe/dart/dart_builder/lib/dart_builder.dart

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+import 'dart:async';
+import 'dart:io' as io;
+import 'package:io/ansi.dart' as ansi;
+import 'package:path/path.dart' as path;
+import 'commands.dart';
+
+class DartProtoBuilder {
+  DartProtoBuilder([this.options = const DartProtoBuilderOptions()])
+      : repositoryRoot = io.Directory.current.parent.parent.parent {
+    // Running this command from within bin (aka: `dart dart_builder.dart`)
+    // throws everything off by one level. This merges that invocation style
+    // with the expected, which is `dart bin/dart_builder.dart`.
+    repositoryRoot = repositoryRoot.absolute.path
+            .endsWith('mediapipe${io.Platform.pathSeparator}mediapipe')
+        ? repositoryRoot.parent
+        : repositoryRoot;
+
+    // Assert we correctly calculated the repository root.
+    if (!io.Directory(
+      path.join(repositoryRoot.absolute.path, '.git'),
+    ).existsSync()) {
+      io.stderr.writeAll(
+        [
+          'Executed dart_builder.dart from unexpected directory.\n',
+          'Try running: `dart bin${io.Platform.pathSeparator}dart_builder.dart`\n'
+        ],
+      );
+      io.exit(1);
+    }
+
+    _mediapipeDir = io.Directory(
+      path.join(repositoryRoot.absolute.path, 'mediapipe'),
+    );
+
+    _dartBuilderDirectory = io.Directory(
+      path.join(
+          repositoryRoot.absolute.path, 'mediapipe', 'dart', 'dart_builder'),
+    );
+
+    _buildDirectory = io.Directory(
+      path.join(
+        io.Directory.current.parent.parent.parent.parent.absolute.path,
+        'build',
+      ),
+    );
+
+    _outputDirectory = options.outputPath != null
+        ? io.Directory(options.outputPath!)
+        : io.Directory(
+            path.join(
+              repositoryRoot.absolute.path,
+              'mediapipe',
+              'dart',
+              'mediapipe',
+              'lib',
+              'generated',
+            ),
+          );
+  }
+
+  final DartProtoBuilderOptions options;
+
+  io.Directory repositoryRoot;
+
+  // This is the `mediapipe` directory *within* the repository itself, which
+  // is also named `mediapipe`
+  io.Directory get mediapipeDir => _mediapipeDir!;
+  io.Directory? _mediapipeDir;
+
+  io.Directory get buildDirectory => _buildDirectory!;
+  io.Directory? _buildDirectory;
+
+  io.Directory get outputDirectory => _outputDirectory!;
+  io.Directory? _outputDirectory;
+
+  io.Directory get dartBuilderDirectory => _dartBuilderDirectory!;
+  io.Directory? _dartBuilderDirectory;
+
+  /// Location of local copy of git@github.com:protocolbuffers/protobuf.git.
+  ///
+  /// This can either be passed in via `options`, or the script will check for
+  /// the repository as a sibling to where `mediapipe` is checked out.
+  ///
+  /// This starts out as `null` but is set by `_confirmProtobufDirectory`, which
+  /// either successfully locates the repository or exits.
+  io.Directory get protobufDirectory => _protobufDirectory!;
+  io.Directory? _protobufDirectory;
+
+  final _protosToCompile = <io.File>[];
+
+  Future<void> run() async {
+    await _confirmOutputDirectories();
+    await _confirmProtocPlugin();
+    await _confirmProtoc();
+    await _confirmProtocGenDart();
+    await _confirmProtobufDirectory();
+    io.stdout.writeln(
+      ansi.wrapWith(
+        'Dependencies installed correctly.',
+        [ansi.green],
+      ),
+    );
+    // await _buildProtos();
+    await _buildBarrelFiles();
+  }
+
+  Future<void> _buildProtos() async {
+    await _prepareProtos();
+
+    await for (io.FileSystemEntity entity
+        in mediapipeDir.list(recursive: true)) {
+      if (entity is! io.File) continue;
+      if (entity.path.endsWith('test.proto')) continue;
+      if (entity.path.contains('tensorflow')) continue;
+      if (entity.path.contains('testdata')) continue;
+      if (entity.path.contains('examples')) continue;
+      if (!entity.path.endsWith('.proto')) continue;
+      _protosToCompile.add(entity);
+    }
+
+    // Lastly, MediaPipe's protobufs have 1 dependency on the `Any` protobuf
+    // from `google/protobuf`. Thus, for the whole thing to compile, we need to
+    // add just that class.
+    final outsideRepository = io.Directory(repositoryRoot.parent.absolute.path);
+    final anyProto = io.File(
+      path.join(
+        outsideRepository.absolute.path,
+        'protobuf',
+        'src',
+        'google',
+        'protobuf',
+        'any.proto',
+      ),
+    );
+    _protosToCompile.add(anyProto);
+    _compileProtos(_protosToCompile);
+  }
+
+  Future<void> _buildBarrelFiles() async {
+    final generatedOutput = _GeneratedOutput();
+    final fileSystemWalk = outputDirectory.list(recursive: true);
+
+    await for (io.FileSystemEntity entity in fileSystemWalk) {
+      if (entity is io.Directory) {
+        generatedOutput.add(entity);
+      } else if (entity is io.File) {
+        generatedOutput.addFile(entity.parent, entity);
+      }
+    }
+
+    int numBarrelFilesGenerated = 0;
+    final sep = io.Platform.pathSeparator;
+    for (final gen in generatedOutput.getDirectories()) {
+      final fileExports = StringBuffer();
+      final nestedBarrelExports = StringBuffer();
+
+      for (final dir in gen.directories) {
+        final dirName = dir.absolute.path.split(sep).last;
+        nestedBarrelExports.writeln("export '$dirName/$dirName.dart';");
+      }
+
+      for (final file in gen.files) {
+        final fileName = file.absolute.path.split(sep).last;
+
+        if (!fileName.endsWith('.dart')) continue;
+
+        // The top-level mediapipe.dart barrel file surfaces multiple collisions
+        // from classes that exist in various libraries and then again within
+        // `tasks`. To avoid these collisions, we skip generating the top-level
+        // barrel file.
+        if (fileName == 'mediapipe.dart') continue;
+
+        // Skip barrel files generated from a previous run
+        final parentFolderName = file.parent.absolute.path.split(sep).last;
+        if (fileName.split('.').first == parentFolderName) continue;
+
+        // Finally, add the valid file export
+        fileExports.writeln("export '$fileName';");
+      }
+
+      final hostDirName = gen.dir.absolute.path.split(sep).last;
+      final barrelFile = io.File(
+        '${gen.dir.absolute.path}$sep$hostDirName.dart',
+      );
+      // Delete a pre-existing barrel file.
+      if (barrelFile.existsSync()) {
+        io.File(barrelFile.absolute.path).deleteSync();
+      }
+      // Write to our new file.
+      final spacingNewline = nestedBarrelExports.isNotEmpty ? '\n' : '';
+      barrelFile.writeAsStringSync(
+        '${nestedBarrelExports.toString()}$spacingNewline${fileExports.toString()}\n',
+      );
+      numBarrelFilesGenerated++;
+    }
+    io.stdout.writeln(
+      ansi.wrapWith(
+        'Generated $numBarrelFilesGenerated barrel files successfully.',
+        [ansi.green],
+      ),
+    );
+  }
+
+  String get protocPath => options.protocPath ?? 'protoc';
+
+  /// Builds a single protobuf definition's Dart file.
+  Future<void> _compileProtos(List<io.File> protoFiles) async {
+    final command = Command.run(
+      [
+        protocPath,
+        '-I${repositoryRoot.absolute.path}',
+        '-I$_protobufCompilationImportPath',
+        '--dart_out=grpc:${outputDirectory.absolute.path}',
+        ...protoFiles.map<String>((entity) => entity.absolute.path),
+      ],
+      workingDirectory: dartBuilderDirectory.absolute.path,
+      debug: true,
+    );
+    await command.run();
+    if (command.exitCode! != 0) {
+      io.stderr.writeln('Exiting with ${command.exitCode}');
+      io.exit(command.exitCode!);
+    }
+  }
+
+  String get _protobufCompilationImportPath => io.Directory(
+        path.join(protobufDirectory.absolute.path, 'src'),
+      ).absolute.path;
+
+  Future<void> _confirmOutputDirectories() async {
+    if (!await _buildDirectory!.exists()) {
+      _buildDirectory!.create();
+    }
+    if (!await _outputDirectory!.exists()) {
+      _outputDirectory!.create();
+    }
+  }
+
+  Future<void> _prepareProtos() async {
+    if (!(await outputDirectory.exists())) {
+      io.stdout.writeln('Creating output directory');
+      outputDirectory.create();
+    }
+  }
+
+  Future<void> _confirmProtoc() async => //
+      Command.which(
+        protocPath,
+        documentationUrl:
+            'http://google.github.io/proto-lens/installing-protoc.html',
+      ).run();
+
+  Future<void> _confirmProtocGenDart() async => //
+      Command.which(
+        'protoc-gen-dart',
+        documentationUrl:
+            'http://google.github.io/proto-lens/installing-protoc.html',
+      ).run();
+
+  Future<void> _confirmProtobufDirectory() async {
+    _protobufDirectory = options.protobufPath != null
+        ? io.Directory(options.protobufPath!)
+        : io.Directory(
+            path.join(repositoryRoot.parent.absolute.path, 'protobuf'),
+          );
+    if (!await _protobufDirectory!.exists()) {
+      io.stderr.writeAll(
+        [
+          'Could not find google/protobuf repository. You can clone this from ',
+          'https://github.com/protocolbuffers/protobuf and either pass its '
+              'location via the `--protobuf` flag, or by default, clone it in the '
+              'same directory where you cloned `google/mediapipe`.\n'
+              '\n',
+          'Checked for protobuf library at ${_protobufDirectory!.absolute.path}\n',
+        ],
+      );
+      io.exit(1);
+    }
+  }
+
+  Future<void> _confirmProtocPlugin() async =>
+      Command.needleInOutput(['dart', 'pub', 'global', 'list'],
+          needle: 'protoc_plugin',
+          ifMissing: [
+            'protoc_plugin does not seem to be installed',
+            'Run `dart pub global activate protoc_plugin` to install it',
+          ]).run();
+}
+
+class DartProtoBuilderOptions {
+  const DartProtoBuilderOptions({
+    this.protocPath,
+    this.protobufPath,
+    this.outputPath,
+  });
+
+  /// Location of `protoc`. Defaults to whatever is found on $PATH.
+  final String? protocPath;
+
+  /// Location of local copy of git@github.com:protocolbuffers/protobuf.git
+  final String? protobufPath;
+
+  /// Place to put the generated protobufs.
+  final String? outputPath;
+}
+
+/// Bundles a set of _GeneratedOutputDirectory objects with helpful getters.
+class _GeneratedOutput {
+  final Map<String, _GeneratedOutputDirectory> generated = {};
+
+  void add(io.Directory dir) {
+    generated[dir.absolute.path] = _GeneratedOutputDirectory(dir);
+    if (contains(dir.parent)) {
+      generated[dir.parent.absolute.path]!.addChild(dir);
+    }
+  }
+
+  bool contains(io.Directory dir) => generated.containsKey(dir.absolute.path);
+
+  _GeneratedOutputDirectory get(io.Directory dir) {
+    if (!contains(dir)) {
+      throw Exception('Unexpectedly asked for unknown directory: '
+          '${dir.absolute.path}. Are you recursively walking the file system?');
+    }
+    return generated[dir.absolute.path]!;
+  }
+
+  void addFile(io.Directory dir, io.File file) => get(dir).addFile(file);
+
+  Iterable<_GeneratedOutputDirectory> getDirectories() sync* {
+    for (final gen in generated.values) {
+      yield gen;
+    }
+  }
+}
+
+/// Tracks which Dart files were generated where for the purposes of adding
+/// barrel files.
+class _GeneratedOutputDirectory {
+  _GeneratedOutputDirectory(this.dir);
+  final io.Directory dir;
+  final List<io.Directory> directories = [];
+  final List<io.File> files = [];
+
+  void addChild(io.Directory dir) => directories.add(dir);
+  void addFile(io.File file) => files.add(file);
+}

mediapipe/dart/dart_builder/pubspec.lock

@@ -0,0 +1,413 @@
+# Generated by pub
+# See https://dart.dev/tools/pub/glossary#lockfile
+packages:
+  _fe_analyzer_shared:
+    dependency: transitive
+    description:
+      name: _fe_analyzer_shared
+      sha256: "0816708f5fbcacca324d811297153fe3c8e047beb5c6752e12292d2974c17045"
+      url: "https://pub.dev"
+    source: hosted
+    version: "62.0.0"
+  analyzer:
+    dependency: transitive
+    description:
+      name: analyzer
+      sha256: "21862995c9932cd082f89d72ae5f5e2c110d1a0204ad06e4ebaee8307b76b834"
+      url: "https://pub.dev"
+    source: hosted
+    version: "6.0.0"
+  ansi:
+    dependency: "direct main"
+    description:
+      name: ansi
+      sha256: ce4857dd957e8e4fcf1c2f409baa5b262a717a6516085d97532621c47ff87c6e
+      url: "https://pub.dev"
+    source: hosted
+    version: "0.2.2"
+  ansi_codes:
+    dependency: transitive
+    description:
+      name: ansi_codes
+      sha256: "48aec9524e26ef234b0376b6bcf92edd9b89ad9c8994ddc7c3b52729af553bed"
+      url: "https://pub.dev"
+    source: hosted
+    version: "0.1.1"
+  args:
+    dependency: transitive
+    description:
+      name: args
+      sha256: eef6c46b622e0494a36c5a12d10d77fb4e855501a91c1b9ef9339326e58f0596
+      url: "https://pub.dev"
+    source: hosted
+    version: "2.4.2"
+  async:
+    dependency: transitive
+    description:
+      name: async
+      sha256: "947bfcf187f74dbc5e146c9eb9c0f10c9f8b30743e341481c1e2ed3ecc18c20c"
+      url: "https://pub.dev"
+    source: hosted
+    version: "2.11.0"
+  boolean_selector:
+    dependency: transitive
+    description:
+      name: boolean_selector
+      sha256: "6cfb5af12253eaf2b368f07bacc5a80d1301a071c73360d746b7f2e32d762c66"
+      url: "https://pub.dev"
+    source: hosted
+    version: "2.1.1"
+  collection:
+    dependency: transitive
+    description:
+      name: collection
+      sha256: f092b211a4319e98e5ff58223576de6c2803db36221657b46c82574721240687
+      url: "https://pub.dev"
+    source: hosted
+    version: "1.17.2"
+  convert:
+    dependency: transitive
+    description:
+      name: convert
+      sha256: "0f08b14755d163f6e2134cb58222dd25ea2a2ee8a195e53983d57c075324d592"
+      url: "https://pub.dev"
+    source: hosted
+    version: "3.1.1"
+  coverage:
+    dependency: transitive
+    description:
+      name: coverage
+      sha256: "2fb815080e44a09b85e0f2ca8a820b15053982b2e714b59267719e8a9ff17097"
+      url: "https://pub.dev"
+    source: hosted
+    version: "1.6.3"
+  crypto:
+    dependency: transitive
+    description:
+      name: crypto
+      sha256: ff625774173754681d66daaf4a448684fb04b78f902da9cb3d308c19cc5e8bab
+      url: "https://pub.dev"
+    source: hosted
+    version: "3.0.3"
+  dart_internal:
+    dependency: transitive
+    description:
+      name: dart_internal
+      sha256: dae3976f383beddcfcd07ad5291a422df2c8c0a8a03c52cda63ac7b4f26e0f4e
+      url: "https://pub.dev"
+    source: hosted
+    version: "0.2.8"
+  file:
+    dependency: transitive
+    description:
+      name: file
+      sha256: "5fc22d7c25582e38ad9a8515372cd9a93834027aacf1801cf01164dac0ffa08c"
+      url: "https://pub.dev"
+    source: hosted
+    version: "7.0.0"
+  fixnum:
+    dependency: transitive
+    description:
+      name: fixnum
+      sha256: "25517a4deb0c03aa0f32fd12db525856438902d9c16536311e76cdc57b31d7d1"
+      url: "https://pub.dev"
+    source: hosted
+    version: "1.1.0"
+  frontend_server_client:
+    dependency: transitive
+    description:
+      name: frontend_server_client
+      sha256: "408e3ca148b31c20282ad6f37ebfa6f4bdc8fede5b74bc2f08d9d92b55db3612"
+      url: "https://pub.dev"
+    source: hosted
+    version: "3.2.0"
+  glob:
+    dependency: transitive
+    description:
+      name: glob
+      sha256: "0e7014b3b7d4dac1ca4d6114f82bf1782ee86745b9b42a92c9289c23d8a0ab63"
+      url: "https://pub.dev"
+    source: hosted
+    version: "2.1.2"
+  http_multi_server:
+    dependency: transitive
+    description:
+      name: http_multi_server
+      sha256: "97486f20f9c2f7be8f514851703d0119c3596d14ea63227af6f7a481ef2b2f8b"
+      url: "https://pub.dev"
+    source: hosted
+    version: "3.2.1"
+  http_parser:
+    dependency: transitive
+    description:
+      name: http_parser
+      sha256: "2aa08ce0341cc9b354a498388e30986515406668dbcc4f7c950c3e715496693b"
+      url: "https://pub.dev"
+    source: hosted
+    version: "4.0.2"
+  io:
+    dependency: "direct main"
+    description:
+      name: io
+      sha256: "2ec25704aba361659e10e3e5f5d672068d332fc8ac516421d483a11e5cbd061e"
+      url: "https://pub.dev"
+    source: hosted
+    version: "1.0.4"
+  js:
+    dependency: transitive
+    description:
+      name: js
+      sha256: f2c445dce49627136094980615a031419f7f3eb393237e4ecd97ac15dea343f3
+      url: "https://pub.dev"
+    source: hosted
+    version: "0.6.7"
+  lints:
+    dependency: "direct dev"
+    description:
+      name: lints
+      sha256: "0a217c6c989d21039f1498c3ed9f3ed71b354e69873f13a8dfc3c9fe76f1b452"
+      url: "https://pub.dev"
+    source: hosted
+    version: "2.1.1"
+  logging:
+    dependency: transitive
+    description:
+      name: logging
+      sha256: "623a88c9594aa774443aa3eb2d41807a48486b5613e67599fb4c41c0ad47c340"
+      url: "https://pub.dev"
+    source: hosted
+    version: "1.2.0"
+  matcher:
+    dependency: transitive
+    description:
+      name: matcher
+      sha256: "1803e76e6653768d64ed8ff2e1e67bea3ad4b923eb5c56a295c3e634bad5960e"
+      url: "https://pub.dev"
+    source: hosted
+    version: "0.12.16"
+  meta:
+    dependency: transitive
+    description:
+      name: meta
+      sha256: "3c74dbf8763d36539f114c799d8a2d87343b5067e9d796ca22b5eb8437090ee3"
+      url: "https://pub.dev"
+    source: hosted
+    version: "1.9.1"
+  mime:
+    dependency: transitive
+    description:
+      name: mime
+      sha256: e4ff8e8564c03f255408decd16e7899da1733852a9110a58fe6d1b817684a63e
+      url: "https://pub.dev"
+    source: hosted
+    version: "1.0.4"
+  node_preamble:
+    dependency: transitive
+    description:
+      name: node_preamble
+      sha256: "6e7eac89047ab8a8d26cf16127b5ed26de65209847630400f9aefd7cd5c730db"
+      url: "https://pub.dev"
+    source: hosted
+    version: "2.0.2"
+  package_config:
+    dependency: transitive
+    description:
+      name: package_config
+      sha256: "1c5b77ccc91e4823a5af61ee74e6b972db1ef98c2ff5a18d3161c982a55448bd"
+      url: "https://pub.dev"
+    source: hosted
+    version: "2.1.0"
+  path:
+    dependency: transitive
+    description:
+      name: path
+      sha256: "8829d8a55c13fc0e37127c29fedf290c102f4e40ae94ada574091fe0ff96c917"
+      url: "https://pub.dev"
+    source: hosted
+    version: "1.8.3"
+  pool:
+    dependency: transitive
+    description:
+      name: pool
+      sha256: "20fe868b6314b322ea036ba325e6fc0711a22948856475e2c2b6306e8ab39c2a"
+      url: "https://pub.dev"
+    source: hosted
+    version: "1.5.1"
+  protobuf:
+    dependency: "direct main"
+    description:
+      name: protobuf
+      sha256: "4034a02b7e231e7e60bff30a8ac13a7347abfdac0798595fae0b90a3f0afe759"
+      url: "https://pub.dev"
+    source: hosted
+    version: "3.0.0"
+  pub_semver:
+    dependency: transitive
+    description:
+      name: pub_semver
+      sha256: "40d3ab1bbd474c4c2328c91e3a7df8c6dd629b79ece4c4bd04bee496a224fb0c"
+      url: "https://pub.dev"
+    source: hosted
+    version: "2.1.4"
+  shelf:
+    dependency: transitive
+    description:
+      name: shelf
+      sha256: ad29c505aee705f41a4d8963641f91ac4cee3c8fad5947e033390a7bd8180fa4
+      url: "https://pub.dev"
+    source: hosted
+    version: "1.4.1"
+  shelf_packages_handler:
+    dependency: transitive
+    description:
+      name: shelf_packages_handler
+      sha256: "89f967eca29607c933ba9571d838be31d67f53f6e4ee15147d5dc2934fee1b1e"
+      url: "https://pub.dev"
+    source: hosted
+    version: "3.0.2"
+  shelf_static:
+    dependency: transitive
+    description:
+      name: shelf_static
+      sha256: a41d3f53c4adf0f57480578c1d61d90342cd617de7fc8077b1304643c2d85c1e
+      url: "https://pub.dev"
+    source: hosted
+    version: "1.1.2"
+  shelf_web_socket:
+    dependency: transitive
+    description:
+      name: shelf_web_socket
+      sha256: "9ca081be41c60190ebcb4766b2486a7d50261db7bd0f5d9615f2d653637a84c1"
+      url: "https://pub.dev"
+    source: hosted
+    version: "1.0.4"
+  source_map_stack_trace:
+    dependency: transitive
+    description:
+      name: source_map_stack_trace
+      sha256: "84cf769ad83aa6bb61e0aa5a18e53aea683395f196a6f39c4c881fb90ed4f7ae"
+      url: "https://pub.dev"
+    source: hosted
+    version: "2.1.1"
+  source_maps:
+    dependency: transitive
+    description:
+      name: source_maps
+      sha256: "708b3f6b97248e5781f493b765c3337db11c5d2c81c3094f10904bfa8004c703"
+      url: "https://pub.dev"
+    source: hosted
+    version: "0.10.12"
+  source_span:
+    dependency: transitive
+    description:
+      name: source_span
+      sha256: "53e943d4206a5e30df338fd4c6e7a077e02254531b138a15aec3bd143c1a8b3c"
+      url: "https://pub.dev"
+    source: hosted
+    version: "1.10.0"
+  stack_trace:
+    dependency: transitive
+    description:
+      name: stack_trace
+      sha256: "73713990125a6d93122541237550ee3352a2d84baad52d375a4cad2eb9b7ce0b"
+      url: "https://pub.dev"
+    source: hosted
+    version: "1.11.1"
+  stream_channel:
+    dependency: transitive
+    description:
+      name: stream_channel
+      sha256: ba2aa5d8cc609d96bbb2899c28934f9e1af5cddbd60a827822ea467161eb54e7
+      url: "https://pub.dev"
+    source: hosted
+    version: "2.1.2"
+  string_scanner:
+    dependency: transitive
+    description:
+      name: string_scanner
+      sha256: "556692adab6cfa87322a115640c11f13cb77b3f076ddcc5d6ae3c20242bedcde"
+      url: "https://pub.dev"
+    source: hosted
+    version: "1.2.0"
+  term_glyph:
+    dependency: transitive
+    description:
+      name: term_glyph
+      sha256: a29248a84fbb7c79282b40b8c72a1209db169a2e0542bce341da992fe1bc7e84
+      url: "https://pub.dev"
+    source: hosted
+    version: "1.2.1"
+  test:
+    dependency: "direct dev"
+    description:
+      name: test
+      sha256: "67ec5684c7a19b2aba91d2831f3d305a6fd8e1504629c5818f8d64478abf4f38"
+      url: "https://pub.dev"
+    source: hosted
+    version: "1.24.4"
+  test_api:
+    dependency: transitive
+    description:
+      name: test_api
+      sha256: "5c2f730018264d276c20e4f1503fd1308dfbbae39ec8ee63c5236311ac06954b"
+      url: "https://pub.dev"
+    source: hosted
+    version: "0.6.1"
+  test_core:
+    dependency: transitive
+    description:
+      name: test_core
+      sha256: "6b753899253c38ca0523bb0eccff3934ec83d011705dae717c61ecf209e333c9"
+      url: "https://pub.dev"
+    source: hosted
+    version: "0.5.4"
+  typed_data:
+    dependency: transitive
+    description:
+      name: typed_data
+      sha256: facc8d6582f16042dd49f2463ff1bd6e2c9ef9f3d5da3d9b087e244a7b564b3c
+      url: "https://pub.dev"
+    source: hosted
+    version: "1.3.2"
+  vm_service:
+    dependency: transitive
+    description:
+      name: vm_service
+      sha256: b8c67f5fa3897b122cf60fe9ff314f7b0ef71eab25c5f8b771480bc338f48823
+      url: "https://pub.dev"
+    source: hosted
+    version: "11.7.2"
+  watcher:
+    dependency: transitive
+    description:
+      name: watcher
+      sha256: "3d2ad6751b3c16cf07c7fca317a1413b3f26530319181b37e3b9039b84fc01d8"
+      url: "https://pub.dev"
+    source: hosted
+    version: "1.1.0"
+  web_socket_channel:
+    dependency: transitive
+    description:
+      name: web_socket_channel
+      sha256: d88238e5eac9a42bb43ca4e721edba3c08c6354d4a53063afaa568516217621b
+      url: "https://pub.dev"
+    source: hosted
+    version: "2.4.0"
+  webkit_inspection_protocol:
+    dependency: transitive
+    description:
+      name: webkit_inspection_protocol
+      sha256: "67d3a8b6c79e1987d19d848b0892e582dbb0c66c57cc1fef58a177dd2aa2823d"
+      url: "https://pub.dev"
+    source: hosted
+    version: "1.2.0"
+  yaml:
+    dependency: transitive
+    description:
+      name: yaml
+      sha256: "75769501ea3489fca56601ff33454fe45507ea3bfb014161abc3b43ae25989d5"
+      url: "https://pub.dev"
+    source: hosted
+    version: "3.1.2"
+sdks:
+  dart: ">=3.1.0-149.0.dev <3.2.0"

mediapipe/dart/dart_builder/pubspec.yaml

@@ -0,0 +1,20 @@
+name: dart_builder
+description: A sample command-line application.
+version: 1.0.0
+# repository: https://github.com/my_org/my_repo
+environment:
+  sdk: ^3.1.0-149.0.dev
+
+# Add regular dependencies here.
+dependencies:
+  ansi: ^0.2.2
+  args: ^2.4.2
+  ffi: ^2.0.2
+  fixnum: ^1.1.0
+  io: ^1.0.4
+  path: ^1.8.3
+  protobuf: ^3.0.0
+
+dev_dependencies:
+  lints: ^2.0.0
+  test: ^1.21.0