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[flutter_plugin_tools] Improve and test 'format' (#4145)
- Adds unit tests, as there are currently none. - Adds more graceful failure handling. - Adds an internal ignore list to skip files that don't need to be formatted that showed up during local testing. - Adds a note explaining that it's intentially not using the new base command due to performance issues.
This commit is contained in:
stuartmorgan
@ -14,6 +14,11 @@ import 'common/core.dart';
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import 'common/plugin_command.dart';
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import 'common/process_runner.dart';
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const int _exitClangFormatFailed = 3;
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const int _exitFlutterFormatFailed = 4;
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const int _exitJavaFormatFailed = 5;
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const int _exitGitFailed = 6;
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final Uri _googleFormatterUrl = Uri.https('github.com',
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'/google/google-java-format/releases/download/google-java-format-1.3/google-java-format-1.3-all-deps.jar');
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@ -43,14 +48,18 @@ class FormatCommand extends PluginCommand {
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Future<void> run() async {
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final String googleFormatterPath = await _getGoogleFormatterPath();
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await _formatDart();
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await _formatJava(googleFormatterPath);
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await _formatCppAndObjectiveC();
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// This class is not based on PackageLoopingCommand because running the
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// formatters separately for each package is an order of magnitude slower,
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// due to the startup overhead of the formatters.
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final Iterable<String> files = await _getFilteredFilePaths(getFiles());
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await _formatDart(files);
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await _formatJava(files, googleFormatterPath);
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await _formatCppAndObjectiveC(files);
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if (getBoolArg('fail-on-change')) {
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final bool modified = await _didModifyAnything();
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if (modified) {
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throw ToolExit(1);
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throw ToolExit(exitCommandFoundErrors);
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}
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}
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}
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@ -60,9 +69,12 @@ class FormatCommand extends PluginCommand {
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'git',
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<String>['ls-files', '--modified'],
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workingDir: packagesDir,
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exitOnError: true,
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logOnError: true,
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);
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if (modifiedFiles.exitCode != 0) {
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printError('Unable to determine changed files.');
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throw ToolExit(_exitGitFailed);
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}
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print('\n\n');
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@ -79,66 +91,105 @@ class FormatCommand extends PluginCommand {
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'pub global run flutter_plugin_tools format" or copy-paste '
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'this command into your terminal:');
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print('patch -p1 <<DONE');
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final io.ProcessResult diff = await processRunner.run(
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'git',
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<String>['diff'],
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workingDir: packagesDir,
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exitOnError: true,
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logOnError: true,
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);
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if (diff.exitCode != 0) {
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printError('Unable to determine diff.');
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throw ToolExit(_exitGitFailed);
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}
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print('patch -p1 <<DONE');
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print(diff.stdout);
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print('DONE');
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return true;
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}
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Future<void> _formatCppAndObjectiveC() async {
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print('Formatting all .cc, .cpp, .mm, .m, and .h files...');
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final Iterable<String> allFiles = <String>[
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...await _getFilesWithExtension('.h'),
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...await _getFilesWithExtension('.m'),
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...await _getFilesWithExtension('.mm'),
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...await _getFilesWithExtension('.cc'),
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...await _getFilesWithExtension('.cpp'),
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];
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// Split this into multiple invocations to avoid a
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// 'ProcessException: Argument list too long'.
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final Iterable<List<String>> batches = partition(allFiles, 100);
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for (final List<String> batch in batches) {
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await processRunner.runAndStream(getStringArg('clang-format'),
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<String>['-i', '--style=Google', ...batch],
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workingDir: packagesDir, exitOnError: true);
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Future<void> _formatCppAndObjectiveC(Iterable<String> files) async {
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final Iterable<String> clangFiles = _getPathsWithExtensions(
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files, <String>{'.h', '.m', '.mm', '.cc', '.cpp'});
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if (clangFiles.isNotEmpty) {
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print('Formatting .cc, .cpp, .h, .m, and .mm files...');
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final Iterable<List<String>> batches = partition(clangFiles, 100);
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int exitCode = 0;
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for (final List<String> batch in batches) {
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batch.sort(); // For ease of testing; partition changes the order.
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exitCode = await processRunner.runAndStream(
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getStringArg('clang-format'),
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<String>['-i', '--style=Google', ...batch],
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workingDir: packagesDir);
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if (exitCode != 0) {
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break;
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}
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}
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if (exitCode != 0) {
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printError(
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'Failed to format C, C++, and Objective-C files: exit code $exitCode.');
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throw ToolExit(_exitClangFormatFailed);
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}
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}
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}
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Future<void> _formatJava(String googleFormatterPath) async {
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print('Formatting all .java files...');
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final Iterable<String> javaFiles = await _getFilesWithExtension('.java');
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await processRunner.runAndStream('java',
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<String>['-jar', googleFormatterPath, '--replace', ...javaFiles],
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workingDir: packagesDir, exitOnError: true);
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Future<void> _formatJava(
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Iterable<String> files, String googleFormatterPath) async {
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final Iterable<String> javaFiles =
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_getPathsWithExtensions(files, <String>{'.java'});
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if (javaFiles.isNotEmpty) {
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print('Formatting .java files...');
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final int exitCode = await processRunner.runAndStream('java',
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<String>['-jar', googleFormatterPath, '--replace', ...javaFiles],
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workingDir: packagesDir);
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if (exitCode != 0) {
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printError('Failed to format Java files: exit code $exitCode.');
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throw ToolExit(_exitJavaFormatFailed);
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}
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}
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}
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Future<void> _formatDart() async {
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// This actually should be fine for non-Flutter Dart projects, no need to
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// specifically shell out to dartfmt -w in that case.
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print('Formatting all .dart files...');
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final Iterable<String> dartFiles = await _getFilesWithExtension('.dart');
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if (dartFiles.isEmpty) {
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print(
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'No .dart files to format. If you set the `--exclude` flag, most likey they were skipped');
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} else {
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await processRunner.runAndStream(
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Future<void> _formatDart(Iterable<String> files) async {
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final Iterable<String> dartFiles =
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_getPathsWithExtensions(files, <String>{'.dart'});
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if (dartFiles.isNotEmpty) {
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print('Formatting .dart files...');
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// `flutter format` doesn't require the project to actually be a Flutter
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// project.
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final int exitCode = await processRunner.runAndStream(
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'flutter', <String>['format', ...dartFiles],
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workingDir: packagesDir, exitOnError: true);
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workingDir: packagesDir);
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if (exitCode != 0) {
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printError('Failed to format Dart files: exit code $exitCode.');
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throw ToolExit(_exitFlutterFormatFailed);
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}
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}
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}
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Future<List<String>> _getFilesWithExtension(String extension) async =>
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getFiles()
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.where((File file) => p.extension(file.path) == extension)
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.map((File file) => file.path)
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.toList();
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Future<Iterable<String>> _getFilteredFilePaths(Stream<File> files) async {
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// Returns a pattern to check for [directories] as a subset of a file path.
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RegExp pathFragmentForDirectories(List<String> directories) {
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final String s = p.separator;
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return RegExp('(?:^|$s)${p.joinAll(directories)}$s');
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}
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return files
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.map((File file) => file.path)
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.where((String path) =>
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// Ignore files in build/ directories (e.g., headers of frameworks)
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// to avoid useless extra work in local repositories.
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!path.contains(
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pathFragmentForDirectories(<String>['example', 'build'])) &&
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// Ignore files in Pods, which are not part of the repository.
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!path.contains(pathFragmentForDirectories(<String>['Pods'])) &&
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// Ignore .dart_tool/, which can have various intermediate files.
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!path.contains(pathFragmentForDirectories(<String>['.dart_tool'])))
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.toList();
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}
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Iterable<String> _getPathsWithExtensions(
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Iterable<String> files, Set<String> extensions) {
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return files.where((String path) => extensions.contains(p.extension(path)));
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}
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Future<String> _getGoogleFormatterPath() async {
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final String javaFormatterPath = p.join(
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