Add an automated script to deploy Flutter demos.

README.md

@@ -72,13 +72,19 @@ cd root directory
 flutter build web -t bin\main.dart --web-renderer html
 ```
 
-## License
+### Deploy flutter demos
+1. Fork this repo: https://github.com/RefactoringGuru/design-patterns-dart
+2. Apply your changes.
+3. Run the script `dart bin\deploy_flutter_demos.dart`.
+This script will build a web platform flutter app and push the changes to your **web-demos** branch on github.
+4. You can now make a pull request on the **web-demos** branch.
+5. Once approved for the merge, the web app will be available at https://refactoringguru.github.io/design-patterns-dart .
 
+## License
 This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.
 
 <a rel="license" href="http://creativecommons.org/licenses/by-nc-nd/4.0/"><img alt="Creative Commons License" style="border-width:0" src="https://i.creativecommons.org/l/by-nc-nd/4.0/80x15.png" /></a>
 
 
 ## Credits
-
 Authors: Alexander Shvets ([@neochief](https://github.com/neochief)), ilopX ([@ilopX](https://github.com/ilopX))

bin/deploy_flutter_demos.dart

@@ -0,0 +1,173 @@
+import 'dart:io';
+
+void main() async {
+  await init();
+
+  final prepareRepository = Future.microtask(() async {
+    await cloneOriginRepository();
+    await fetchUpstream();
+  });
+
+  final buildProject = Future.microtask(() async {
+    await buildWebProject();
+  });
+
+  await Future.wait([prepareRepository, buildProject]);
+
+  copyFiles();
+  await pushToOrigin();
+  clear();
+}
+
+Future<void> init() async {
+  print('Use temp: $tmpDir');
+  originUrl = await repositoryOriginUrl(projectDir);
+}
+
+Future<void> buildWebProject() async {
+  final flutterTargetFile = '${projectDir.path}bin\\main.dart';
+  print('Build web app: $flutterTargetFile');
+  await cmd('flutter build web -t $flutterTargetFile --web-renderer html');
+}
+
+Future<void> cloneOriginRepository() async {
+  print('Cloning origin: [web-demos] $originUrl');
+  await cmd(
+    'git clone -b web-demos --single-branch $originUrl .',
+    workingDirectory: tmpDir,
+  );
+}
+
+Future<void> fetchUpstream() async {
+  final shvets = r'https://github.com/RefactoringGuru/design-patterns-dart.git';
+  print('Fetch upstream: [web-demos] $shvets');
+  await cmd('git remote add upstream $shvets', workingDirectory: tmpDir);
+  await cmd('git fetch upstream', workingDirectory: tmpDir);
+}
+
+void copyFiles() {
+  print('Copy files:');
+  copyDirectory(webBuildDir, tmpDir);
+}
+
+Future<void> pushToOrigin() async {
+  await cmd('git add .', workingDirectory: tmpDir);
+  await cmd(
+    'git commit -m ${await lastProjectCommit()}',
+    workingDirectory: tmpDir,
+    showOut: true,
+  );
+
+  print('Push to origin: [web-demos] $originUrl');
+  await cmd(
+    'git push origin web-demos',
+    workingDirectory: tmpDir,
+    showOut: true,
+  );
+}
+
+late final tmpDir = Directory.systemTemp.createTempSync();
+late final projectDir = thisPath(r'..\');
+late final webBuildDir = Directory(projectDir.uri.toFilePath() + r'build\web');
+late final String originUrl;
+
+void clear() {
+  print('Clear: $tmpDir');
+  tmpDir.deleteSync(recursive: true);
+}
+
+Future<String> cmd(
+  String command, {
+  Directory? workingDirectory,
+  bool showOut = false,
+}) async {
+  var process = await Process.run(
+    command,
+    [],
+    workingDirectory: workingDirectory?.path,
+    runInShell: true,
+  );
+
+  if (showOut) {
+    print(process.stdout);
+  }
+
+  if (process.exitCode != 0) {
+    print(command);
+    print(process.stderr);
+    clear();
+    exit(process.exitCode);
+  }
+
+  return process.stdout;
+}
+
+Future<String> repositoryOriginUrl(Directory workingDir) async {
+  final raw = await cmd(
+    'git remote show origin',
+    workingDirectory: workingDir,
+  );
+  final url = RegExp('Push  URL: (.+)\n').firstMatch(raw)?.group(1);
+
+  if (url == null) {
+    throw Exception('Empty Remote repository');
+  }
+
+  return url;
+}
+
+Future<String> lastProjectCommit() async {
+  final rawCommit =
+      await cmd('git log -1 --pretty=%B', workingDirectory: projectDir);
+  final formatCommit = rawCommit.replaceAll(' ', '_');
+  return 'auto_commit:_$formatCommit';
+}
+
+Directory thisPath(String name) {
+  final dir = Platform.script.pathSegments
+          .sublist(0, Platform.script.pathSegments.length - 1)
+          .join(Platform.pathSeparator) +
+      Platform.pathSeparator +
+      name;
+
+  return Directory(Uri.directory(dir).normalizePath().toFilePath());
+}
+
+void copyDirectory(Directory source, Directory target) {
+  if (!target.existsSync()) {
+    target.createSync();
+  }
+
+  for (final entry in source.listSync()) {
+    final newPath = updatePath(entry, source, target);
+
+    if (entry is File) {
+      copyFile(entry, newPath);
+    } else if (entry is Directory) {
+      copyDirectory(entry, Directory(newPath));
+    } else {
+      throw Exception(
+        'FileSystemEntity is not recognized. It must be a file or a directory',
+      );
+    }
+  }
+}
+
+void copyFile(File entry, String newFileName) {
+  print('\t${removerBuildPath(entry)}');
+  entry.copySync(newFileName);
+}
+
+String updatePath(
+  FileSystemEntity entry,
+  Directory source,
+  Directory target,
+) {
+  return entry.path
+      .replaceFirst(source.path, target.path + Platform.pathSeparator)
+      .replaceAll(r'\\', r'\');
+}
+
+String removerBuildPath(FileSystemEntity target) {
+  return target.path.replaceFirst(webBuildDir.path, '').substring(1);
+}