lib/web_ui/dev/firefox_installer.dart - mirrors/engine - Git at Google

 // Copyright 2013 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;

 import 'package:http/http.dart';
 import 'package:path/path.dart' as path;

 import 'common.dart';
 import 'environment.dart';
 import 'exceptions.dart';

 const String _firefoxExecutableVar = 'FIREFOX_EXECUTABLE';

 /// Returns the installation of Firefox, installing it if necessary.
 ///
 /// If [requestedVersion] is null, uses the version specified on the
 /// command-line. If not specified on the command-line, uses the version
 /// specified in the "package_lock.yaml" file.
 ///
 /// If [requestedVersion] is not null, installs that version. The value
 /// may be "latest" (the latest stable Firefox version), "system"
 /// (manually installed Firefox on the current operating system), or an
 /// exact version number such as 69.0.3. Versions of Firefox can be found here:
 ///
 /// https://download-installer.cdn.mozilla.net/pub/firefox/releases/
 Future<BrowserInstallation> getOrInstallFirefox(
   String requestedVersion, {
   StringSink? infoLog,
 }) async {
   // These tests are aimed to run only on the Linux containers in Cirrus.
   // Therefore Firefox installation is implemented only for Linux now.
   if (!io.Platform.isLinux && !io.Platform.isMacOS) {
     throw UnimplementedError('Firefox Installer is only supported on Linux '
         'and Mac operating systems');
   }

   infoLog ??= io.stdout;

   // When running on LUCI, if we specify the "firefox" dependency, then the
   // bot will download Firefox from CIPD and place it in a cache and set the
   // environment variable FIREFOX_EXECUTABLE.
   if (io.Platform.environment.containsKey(_firefoxExecutableVar)) {
     infoLog.writeln('Using Firefox from $_firefoxExecutableVar variable: '
       '${io.Platform.environment[_firefoxExecutableVar]}');
     return BrowserInstallation(
       version: 'cipd',
       executable: io.Platform.environment[_firefoxExecutableVar]!,
     );
   }

   if (requestedVersion == 'system') {
     return BrowserInstallation(
       version: 'system',
       executable: await _findSystemFirefoxExecutable(),
     );
   }

   FirefoxInstaller? installer;
   try {
     installer = requestedVersion == 'latest'
         ? await FirefoxInstaller.latest()
         : FirefoxInstaller(version: requestedVersion);

     if (installer.isInstalled) {
       infoLog.writeln(
           'Installation was skipped because Firefox version ${installer.version} is already installed.');
     } else {
       infoLog.writeln('Installing Firefox version: ${installer.version}');
       await installer.install();
       final BrowserInstallation installation = installer.getInstallation()!;
       infoLog.writeln(
           'Installations complete. To launch it run ${installation.executable}');
     }
     return installer.getInstallation()!;
   } finally {
     installer?.close();
   }
 }

 /// Manages the installation of a particular [version] of Firefox.
 class FirefoxInstaller {
   factory FirefoxInstaller({
     required String version,
   }) {
     if (version == 'system') {
       throw BrowserInstallerException(
           'Cannot install system version of Firefox. System Firefox must be installed manually.');
     }
     if (version == 'latest') {
       throw BrowserInstallerException(
           'Expected a concrete Firefox version, but got $version. Maybe use FirefoxInstaller.latest()?');
     }
     final io.Directory firefoxInstallationDir = io.Directory(
       path.join(environment.webUiDartToolDir.path, 'firefox'),
     );
     final io.Directory versionDir = io.Directory(
       path.join(firefoxInstallationDir.path, version),
     );
     return FirefoxInstaller._(
       version: version,
       firefoxInstallationDir: firefoxInstallationDir,
       versionDir: versionDir,
     );
   }

   FirefoxInstaller._({
     required this.version,
     required this.firefoxInstallationDir,
     required this.versionDir,
   });

   static Future<FirefoxInstaller> latest() async {
     final String latestVersion = io.Platform.isLinux
         ? await fetchLatestFirefoxVersionLinux()
         : await fetchLatestFirefoxVersionMacOS();
     return FirefoxInstaller(version: latestVersion);
   }

   /// Firefox version managed by this installer.
   final String version;

   /// HTTP client used to download Firefox.
   final Client client = Client();

   /// Root directory that contains Firefox versions.
   final io.Directory firefoxInstallationDir;

   /// Installation directory for Firefox of the requested [version].
   final io.Directory versionDir;

   bool get isInstalled {
     return versionDir.existsSync();
   }

   BrowserInstallation? getInstallation() {
     if (!isInstalled) {
       return null;
     }

     return BrowserInstallation(
       version: version,
       executable: PlatformBinding.instance.getFirefoxExecutablePath(versionDir),
     );
   }

   /// Install the browser by downloading from the web.
   Future<void> install() async {
     final io.File downloadedFile = await _download();
     if (io.Platform.isLinux) {
       await _uncompress(downloadedFile);
     } else if (io.Platform.isMacOS) {
       await _mountDmgAndCopy(downloadedFile);
     }
     downloadedFile.deleteSync();
   }

   /// Downloads the browser version from web into a target file.
   /// See [version].
   Future<io.File> _download() async {
     if (versionDir.existsSync()) {
       versionDir.deleteSync(recursive: true);
     }

     versionDir.createSync(recursive: true);
     final String url = PlatformBinding.instance.getFirefoxDownloadUrl(version);
     final StreamedResponse download = await client.send(Request(
       'GET',
       Uri.parse(url),
     ));

     final io.File downloadedFile =
         io.File(path.join(versionDir.path, PlatformBinding.instance.getFirefoxDownloadFilename(version)));
     final io.IOSink sink = downloadedFile.openWrite();
     await download.stream.pipe(sink);
     await sink.flush();
     await sink.close();

     return downloadedFile;
   }

   /// Uncompress the downloaded browser files for operating systems that
   /// use a zip archive.
   /// See [version].
   Future<void> _uncompress(io.File downloadedFile) async {
     final io.ProcessResult unzipResult = await io.Process.run('tar', <String>[
       '-x',
       '-f',
       downloadedFile.path,
       '-C',
       versionDir.path,
     ]);

     if (unzipResult.exitCode != 0) {
       throw BrowserInstallerException(
           'Failed to unzip the downloaded Firefox archive ${downloadedFile.path}.\n'
           'The unzip process exited with code ${unzipResult.exitCode}.');
     }
   }

   /// Mounts the dmg file using hdiutil, copies content of the volume to
   /// target path and then unmounts dmg ready for deletion.
   Future<void> _mountDmgAndCopy(io.File dmgFile) async {
     final String volumeName = await _hdiUtilMount(dmgFile);

     final String sourcePath = '$volumeName/Firefox.app';
     final String targetPath = path.dirname(dmgFile.path);
     try {
       final io.ProcessResult installResult = await io.Process.run('cp', <String>[
         '-r',
         sourcePath,
         targetPath,
       ]);
       if (installResult.exitCode != 0) {
         throw BrowserInstallerException(
             'Failed to copy Firefox disk image contents from '
             '$sourcePath to $targetPath.\n'
             'Exit code ${installResult.exitCode}.\n'
             '${installResult.stderr}');
       }
     } finally {
       await _hdiUtilUnmount(volumeName);
     }
   }

   Future<String> _hdiUtilMount(io.File dmgFile) async {
     final io.ProcessResult mountResult = await io.Process.run('hdiutil', <String>[
       'attach',
       '-readonly',
       dmgFile.path,
     ]);
     if (mountResult.exitCode != 0) {
       throw BrowserInstallerException(
           'Failed to mount Firefox disk image ${dmgFile.path}.\n'
               'Exit code ${mountResult.exitCode}.\n${mountResult.stderr}');
     }

     final List<String> processOutput = (mountResult.stdout as String).split('\n');
     final String? volumePath = _volumeFromMountResult(processOutput);
     if (volumePath == null) {
       throw BrowserInstallerException(
           'Failed to parse mount dmg result ${processOutput.join('\n')}.\n'
               'Expected /Volumes/{volume name}');
     }
     return volumePath;
   }

   // Parses volume from mount result.
   // Output is of form: {devicename} /Volumes/{name}.
   String? _volumeFromMountResult(List<String> lines) {
     for (final String line in lines) {
       final int pos = line.indexOf('/Volumes');
       if (pos != -1) {
         return line.substring(pos);
       }
     }
     return null;
   }

   Future<void> _hdiUtilUnmount(String volumeName) async {
     final io.ProcessResult unmountResult = await io.Process.run('hdiutil', <String>[
       'unmount',
       volumeName,
     ]);
     if (unmountResult.exitCode != 0) {
       throw BrowserInstallerException(
           'Failed to unmount Firefox disk image $volumeName.\n'
               'Exit code ${unmountResult.exitCode}. ${unmountResult.stderr}');
     }
   }

   void close() {
     client.close();
   }
 }

 Future<String> _findSystemFirefoxExecutable() async {
   final io.ProcessResult which =
       await io.Process.run('which', <String>['firefox']);
   final bool found = which.exitCode != 0;
   const String fireFoxDefaultInstallPath =
       '/Applications/Firefox.app/Contents/MacOS/firefox';
   if (!found) {
     if (io.Platform.isMacOS &&
         io.File(fireFoxDefaultInstallPath).existsSync()) {
       return Future<String>.value(fireFoxDefaultInstallPath);
     }
     throw BrowserInstallerException(
         'Failed to locate system Firefox installation.');
   }
   return which.stdout as String;
 }

 /// Fetches the latest available Firefox build version on Linux.
 Future<String> fetchLatestFirefoxVersionLinux() async {
   final RegExp forFirefoxVersion = RegExp('firefox-[0-9.]+[0-9]');
   final io.HttpClientRequest request = await io.HttpClient()
       .getUrl(Uri.parse(PlatformBinding.instance.getFirefoxLatestVersionUrl()));
   request.followRedirects = false;
   // We will parse the HttpHeaders to find the redirect location.
   final io.HttpClientResponse response = await request.close();

   final String location = response.headers.value('location')!;
   final String version = forFirefoxVersion.stringMatch(location)!;

   return version.substring(version.lastIndexOf('-') + 1);
 }

 /// Fetches the latest available Firefox build version on Mac OS.
 Future<String> fetchLatestFirefoxVersionMacOS() async {
   final RegExp forFirefoxVersion = RegExp('firefox/releases/[0-9.]+[0-9]');
   final io.HttpClientRequest request = await io.HttpClient()
       .getUrl(Uri.parse(PlatformBinding.instance.getFirefoxLatestVersionUrl()));
   request.followRedirects = false;
   // We will parse the HttpHeaders to find the redirect location.
   final io.HttpClientResponse response = await request.close();

   final String location = response.headers.value('location')!;
   final String version = forFirefoxVersion.stringMatch(location)!;
   return version.substring(version.lastIndexOf('/') + 1);
 }

 Future<BrowserInstallation> getInstaller({String requestedVersion = 'latest'}) async {
   FirefoxInstaller? installer;
   try {
     installer = requestedVersion == 'latest'
         ? await FirefoxInstaller.latest()
         : FirefoxInstaller(version: requestedVersion);

     if (installer.isInstalled) {
       print('Installation was skipped because Firefox version '
           '${installer.version} is already installed.');
     } else {
       print('Installing Firefox version: ${installer.version}');
       await installer.install();
       final BrowserInstallation installation = installer.getInstallation()!;
       print(
           'Installations complete. To launch it run ${installation.executable}');
     }
     return installer.getInstallation()!;
   } finally {
     installer?.close();
   }
 }
	// Copyright 2013 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;

	import 'package:http/http.dart';
	import 'package:path/path.dart' as path;

	import 'common.dart';
	import 'environment.dart';
	import 'exceptions.dart';

	const String _firefoxExecutableVar = 'FIREFOX_EXECUTABLE';

	/// Returns the installation of Firefox, installing it if necessary.
	///
	/// If [requestedVersion] is null, uses the version specified on the
	/// command-line. If not specified on the command-line, uses the version
	/// specified in the "package_lock.yaml" file.
	///
	/// If [requestedVersion] is not null, installs that version. The value
	/// may be "latest" (the latest stable Firefox version), "system"
	/// (manually installed Firefox on the current operating system), or an
	/// exact version number such as 69.0.3. Versions of Firefox can be found here:
	///
	/// https://download-installer.cdn.mozilla.net/pub/firefox/releases/
	Future<BrowserInstallation> getOrInstallFirefox(
	String requestedVersion, {
	StringSink? infoLog,
	}) async {
	// These tests are aimed to run only on the Linux containers in Cirrus.
	// Therefore Firefox installation is implemented only for Linux now.
	if (!io.Platform.isLinux && !io.Platform.isMacOS) {
	throw UnimplementedError('Firefox Installer is only supported on Linux '
	'and Mac operating systems');
	}

	infoLog ??= io.stdout;

	// When running on LUCI, if we specify the "firefox" dependency, then the
	// bot will download Firefox from CIPD and place it in a cache and set the
	// environment variable FIREFOX_EXECUTABLE.
	if (io.Platform.environment.containsKey(_firefoxExecutableVar)) {
	infoLog.writeln('Using Firefox from $_firefoxExecutableVar variable: '
	'${io.Platform.environment[_firefoxExecutableVar]}');
	return BrowserInstallation(
	version: 'cipd',
	executable: io.Platform.environment[_firefoxExecutableVar]!,
	);
	}

	if (requestedVersion == 'system') {
	return BrowserInstallation(
	version: 'system',
	executable: await _findSystemFirefoxExecutable(),
	);
	}

	FirefoxInstaller? installer;
	try {
	installer = requestedVersion == 'latest'
	? await FirefoxInstaller.latest()
	: FirefoxInstaller(version: requestedVersion);

	if (installer.isInstalled) {
	infoLog.writeln(
	'Installation was skipped because Firefox version ${installer.version} is already installed.');
	} else {
	infoLog.writeln('Installing Firefox version: ${installer.version}');
	await installer.install();
	final BrowserInstallation installation = installer.getInstallation()!;
	infoLog.writeln(
	'Installations complete. To launch it run ${installation.executable}');
	}
	return installer.getInstallation()!;
	} finally {
	installer?.close();
	}
	}

	/// Manages the installation of a particular [version] of Firefox.
	class FirefoxInstaller {
	factory FirefoxInstaller({
	required String version,
	}) {
	if (version == 'system') {
	throw BrowserInstallerException(
	'Cannot install system version of Firefox. System Firefox must be installed manually.');
	}
	if (version == 'latest') {
	throw BrowserInstallerException(
	'Expected a concrete Firefox version, but got $version. Maybe use FirefoxInstaller.latest()?');
	}
	final io.Directory firefoxInstallationDir = io.Directory(
	path.join(environment.webUiDartToolDir.path, 'firefox'),
	);
	final io.Directory versionDir = io.Directory(
	path.join(firefoxInstallationDir.path, version),
	);
	return FirefoxInstaller._(
	version: version,
	firefoxInstallationDir: firefoxInstallationDir,
	versionDir: versionDir,
	);
	}

	FirefoxInstaller._({
	required this.version,
	required this.firefoxInstallationDir,
	required this.versionDir,
	});

	static Future<FirefoxInstaller> latest() async {
	final String latestVersion = io.Platform.isLinux
	? await fetchLatestFirefoxVersionLinux()
	: await fetchLatestFirefoxVersionMacOS();
	return FirefoxInstaller(version: latestVersion);
	}

	/// Firefox version managed by this installer.
	final String version;

	/// HTTP client used to download Firefox.
	final Client client = Client();

	/// Root directory that contains Firefox versions.
	final io.Directory firefoxInstallationDir;

	/// Installation directory for Firefox of the requested [version].
	final io.Directory versionDir;

	bool get isInstalled {
	return versionDir.existsSync();
	}

	BrowserInstallation? getInstallation() {
	if (!isInstalled) {
	return null;
	}

	return BrowserInstallation(
	version: version,
	executable: PlatformBinding.instance.getFirefoxExecutablePath(versionDir),
	);
	}

	/// Install the browser by downloading from the web.
	Future<void> install() async {
	final io.File downloadedFile = await _download();
	if (io.Platform.isLinux) {
	await _uncompress(downloadedFile);
	} else if (io.Platform.isMacOS) {
	await _mountDmgAndCopy(downloadedFile);
	}
	downloadedFile.deleteSync();
	}

	/// Downloads the browser version from web into a target file.
	/// See [version].
	Future<io.File> _download() async {
	if (versionDir.existsSync()) {
	versionDir.deleteSync(recursive: true);
	}

	versionDir.createSync(recursive: true);
	final String url = PlatformBinding.instance.getFirefoxDownloadUrl(version);
	final StreamedResponse download = await client.send(Request(
	'GET',
	Uri.parse(url),
	));

	final io.File downloadedFile =
	io.File(path.join(versionDir.path, PlatformBinding.instance.getFirefoxDownloadFilename(version)));
	final io.IOSink sink = downloadedFile.openWrite();
	await download.stream.pipe(sink);
	await sink.flush();
	await sink.close();

	return downloadedFile;
	}

	/// Uncompress the downloaded browser files for operating systems that
	/// use a zip archive.
	/// See [version].
	Future<void> _uncompress(io.File downloadedFile) async {
	final io.ProcessResult unzipResult = await io.Process.run('tar', <String>[
	'-x',
	'-f',
	downloadedFile.path,
	'-C',
	versionDir.path,
	]);

	if (unzipResult.exitCode != 0) {
	throw BrowserInstallerException(
	'Failed to unzip the downloaded Firefox archive ${downloadedFile.path}.\n'
	'The unzip process exited with code ${unzipResult.exitCode}.');
	}
	}

	/// Mounts the dmg file using hdiutil, copies content of the volume to
	/// target path and then unmounts dmg ready for deletion.
	Future<void> _mountDmgAndCopy(io.File dmgFile) async {
	final String volumeName = await _hdiUtilMount(dmgFile);

	final String sourcePath = '$volumeName/Firefox.app';
	final String targetPath = path.dirname(dmgFile.path);
	try {
	final io.ProcessResult installResult = await io.Process.run('cp', <String>[
	'-r',
	sourcePath,
	targetPath,
	]);
	if (installResult.exitCode != 0) {
	throw BrowserInstallerException(
	'Failed to copy Firefox disk image contents from '
	'$sourcePath to $targetPath.\n'
	'Exit code ${installResult.exitCode}.\n'
	'${installResult.stderr}');
	}
	} finally {
	await _hdiUtilUnmount(volumeName);
	}
	}

	Future<String> _hdiUtilMount(io.File dmgFile) async {
	final io.ProcessResult mountResult = await io.Process.run('hdiutil', <String>[
	'attach',
	'-readonly',
	dmgFile.path,
	]);
	if (mountResult.exitCode != 0) {
	throw BrowserInstallerException(
	'Failed to mount Firefox disk image ${dmgFile.path}.\n'
	'Exit code ${mountResult.exitCode}.\n${mountResult.stderr}');
	}

	final List<String> processOutput = (mountResult.stdout as String).split('\n');
	final String? volumePath = _volumeFromMountResult(processOutput);
	if (volumePath == null) {
	throw BrowserInstallerException(
	'Failed to parse mount dmg result ${processOutput.join('\n')}.\n'
	'Expected /Volumes/{volume name}');
	}
	return volumePath;
	}

	// Parses volume from mount result.
	// Output is of form: {devicename} /Volumes/{name}.
	String? _volumeFromMountResult(List<String> lines) {
	for (final String line in lines) {
	final int pos = line.indexOf('/Volumes');
	if (pos != -1) {
	return line.substring(pos);
	}
	}
	return null;
	}

	Future<void> _hdiUtilUnmount(String volumeName) async {
	final io.ProcessResult unmountResult = await io.Process.run('hdiutil', <String>[
	'unmount',
	volumeName,
	]);
	if (unmountResult.exitCode != 0) {
	throw BrowserInstallerException(
	'Failed to unmount Firefox disk image $volumeName.\n'
	'Exit code ${unmountResult.exitCode}. ${unmountResult.stderr}');
	}
	}

	void close() {
	client.close();
	}
	}

	Future<String> _findSystemFirefoxExecutable() async {
	final io.ProcessResult which =
	await io.Process.run('which', <String>['firefox']);
	final bool found = which.exitCode != 0;
	const String fireFoxDefaultInstallPath =
	'/Applications/Firefox.app/Contents/MacOS/firefox';
	if (!found) {
	if (io.Platform.isMacOS &&
	io.File(fireFoxDefaultInstallPath).existsSync()) {
	return Future<String>.value(fireFoxDefaultInstallPath);
	}
	throw BrowserInstallerException(
	'Failed to locate system Firefox installation.');
	}
	return which.stdout as String;
	}

	/// Fetches the latest available Firefox build version on Linux.
	Future<String> fetchLatestFirefoxVersionLinux() async {
	final RegExp forFirefoxVersion = RegExp('firefox-[0-9.]+[0-9]');
	final io.HttpClientRequest request = await io.HttpClient()
	.getUrl(Uri.parse(PlatformBinding.instance.getFirefoxLatestVersionUrl()));
	request.followRedirects = false;
	// We will parse the HttpHeaders to find the redirect location.
	final io.HttpClientResponse response = await request.close();

	final String location = response.headers.value('location')!;
	final String version = forFirefoxVersion.stringMatch(location)!;

	return version.substring(version.lastIndexOf('-') + 1);
	}

	/// Fetches the latest available Firefox build version on Mac OS.
	Future<String> fetchLatestFirefoxVersionMacOS() async {
	final RegExp forFirefoxVersion = RegExp('firefox/releases/[0-9.]+[0-9]');
	final io.HttpClientRequest request = await io.HttpClient()
	.getUrl(Uri.parse(PlatformBinding.instance.getFirefoxLatestVersionUrl()));
	request.followRedirects = false;
	// We will parse the HttpHeaders to find the redirect location.
	final io.HttpClientResponse response = await request.close();

	final String location = response.headers.value('location')!;
	final String version = forFirefoxVersion.stringMatch(location)!;
	return version.substring(version.lastIndexOf('/') + 1);
	}

	Future<BrowserInstallation> getInstaller({String requestedVersion = 'latest'}) async {
	FirefoxInstaller? installer;
	try {
	installer = requestedVersion == 'latest'
	? await FirefoxInstaller.latest()
	: FirefoxInstaller(version: requestedVersion);

	if (installer.isInstalled) {
	print('Installation was skipped because Firefox version '
	'${installer.version} is already installed.');
	} else {
	print('Installing Firefox version: ${installer.version}');
	await installer.install();
	final BrowserInstallation installation = installer.getInstallation()!;
	print(
	'Installations complete. To launch it run ${installation.executable}');
	}
	return installer.getInstallation()!;
	} finally {
	installer?.close();
	}
	}