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import 'dart:async';
import 'dart:convert';
import 'dart:io';
import 'package:grinder/grinder.dart';
import 'package:path/path.dart' as path;
void main(List<String> args) => grind(args);
@Task('Format dart files')
Future<void> format({String path = '.'}) async {
await _runProcess('flutter', ['format', path]);
}
@Task('Update code segments')
Future<void> updateCodeSegments() async {
final codeviewerPath =
path.join(Directory.current.path, 'tool', 'codeviewer_cli', 'main.dart');
Dart.run(codeviewerPath);
final codeSegmentsPath = path.join('lib', 'codeviewer', 'code_segments.dart');
await format(path: codeSegmentsPath);
}
@Task('Verify code segments')
Future<void> verifyCodeSegments() async {
final codeviewerPath =
path.join(Directory.current.path, 'tool', 'codeviewer_cli', 'main.dart');
// We use stdin and stdout to write and format the code segments, to avoid
// creating any files.
final codeSegmentsUnformatted =
Dart.run(codeviewerPath, arguments: ['--dry-run'], quiet: true);
final codeSegmentsFormatted = await _startProcess(
path.normalize(path.join(dartVM.path, '../dartfmt')),
input: codeSegmentsUnformatted,
);
// Read the original code segments file.
final codeSegmentsPath = path.join(
Directory.current.path, 'lib', 'codeviewer', 'code_segments.dart');
final expectedCodeSegmentsOutput =
await File(codeSegmentsPath).readAsString();
if (codeSegmentsFormatted.trim() != expectedCodeSegmentsOutput.trim()) {
stderr.writeln(
'The contents of $codeSegmentsPath are different from that produced by '
'codeviewer_cli. Did you forget to run `flutter pub run grinder '
'update-code-segments` after updating a demo?',
);
exit(1);
}
}
Future<void> _runProcess(String executable, List<String> arguments) async {
final result = await Process.run(executable, arguments);
stdout.write(result.stdout);
stderr.write(result.stderr);
}
// Function to make sure we capture all of the stdout.
// Reference: https://github.com/dart-lang/sdk/issues/31666
Future<String> _startProcess(String executable,
{List<String> arguments = const [], String? input}) async {
final output = <int>[];
final completer = Completer<int>();
final process = await Process.start(executable, arguments);
process.stdin.writeln(input);
process.stdout.listen(
(event) {
output.addAll(event);
},
onDone: () async => completer.complete(await process.exitCode),
);
await process.stdin.close();
final exitCode = await completer.future;
if (exitCode != 0) {
stderr.write(
'Running "$executable ${arguments.join(' ')}" failed with $exitCode.\n',
);
exit(exitCode);
}
return Future<String>.value(utf8.decoder.convert(output));
}