WIP: iOS support

flutter_wasm/bin/ios_setup.dart

@@ -0,0 +1,179 @@
+// Copyright (c) 2021, the Dart project authors.  Please see the AUTHORS file
+// for details. All rights reserved. Use of this source code is governed by a
+// BSD-style license that can be found in the LICENSE file.
+
+// Builds the wasmer runtime library for iOS, as a static framework.
+// Usage: flutter pub run flutter_wasm:ios_setup path/to/output/directory
+
+import 'dart:async';
+import 'dart:convert';
+import 'dart:io';
+
+import 'package:path/path.dart' as path;
+import 'package:wasm/src/shared.dart';
+
+final thisDir = path.dirname(Platform.script.path);
+const inputLibName = 'libwasmer.dylib';
+const outputLibName = 'flutter_wasm';
+const archiveName = 'flutter_wasm_archive';
+
+class Abi {
+  final String triple;
+  Abi(this.triple);
+}
+
+class IOSSdk {
+  final String xcodeName;
+  final List<Abi> abis;
+  IOSSdk(this.xcodeName, this.abis);
+
+  Future<String> findTool(String tool) async {
+    return await _xcrun(['--sdk', xcodeName, '--find', tool]);
+  }
+
+  Future<String> findSdk() async {
+    return await _xcrun(['--sdk', xcodeName, '--show-sdk-path']);
+  }
+}
+
+final List<IOSSdk> iOSSdks = [
+  /*IOSSdk('iphoneos', [
+    // Abi('armv7-apple-ios'),
+    Abi('aarch64-apple-ios'),
+  ]),*/
+  IOSSdk('iphonesimulator', [
+    //Abi('aarch64-apple-ios-sim'),
+    Abi('x86_64-apple-ios'),
+  ]),
+];
+
+Future<void> checkResult(Process process) async {
+  final result = await process.exitCode;
+  if (result != 0) {
+    exitCode = result;
+    throw Exception('Build failed. Scroll up for the logs.');
+  }
+}
+
+Future<void> _run(String program, List<String> args) async {
+  print('FFFFF: ${Platform.script.path}');
+  print('$program ${args.join(' ')}');
+  final process = await Process.start(
+    program,
+    args,
+    workingDirectory: thisDir,
+  );
+  unawaited(stderr.addStream(process.stderr));
+  unawaited(stdout.addStream(process.stdout));
+  await checkResult(process);
+}
+
+void copyDirectory(String from, String to) {
+  for (final f in Directory(from).listSync(recursive: true)) {
+    if (f is File) {
+      final toPath = path.join(to, path.relative(f.path, from: from));
+      Directory(path.dirname(toPath)).createSync(recursive: true);
+      f.copySync(toPath);
+    }
+  }
+}
+
+Future<String> _xcrun(List<String> args) async {
+  final process = await Process.start(
+    'xcrun',
+    args
+  );
+  unawaited(stderr.addStream(process.stderr));
+  final out = await process.stdout
+        .transform(utf8.decoder)
+        .transform(LineSplitter())
+        .firstWhere((line) => line.isNotEmpty);
+  await checkResult(process);
+  return out;
+}
+
+Future<void> main(List<String> args) async {
+  await _run('flutter', ['pub', 'get']);
+
+  final outDir = Directory(args[0]);
+  print('Output directory: ${outDir.path}');
+  print('This directory: $thisDir');
+
+  if (!outDir.existsSync()) {
+    await outDir.create(recursive: true);
+  }
+
+  final tempFrameworks = <String>[];
+  for (final iOSSdk in iOSSdks) {
+    final sdkOutDir = path.join(thisDir, 'ios/build/${iOSSdk.xcodeName}');
+    // final frameworkTemplatePath = path.join(thisDir, 'ios/FrameworkTemplate');
+
+    // HACK
+    final frameworkTemplatePath = '/Users/liama/dev/wasm/flutter_wasm/ios/FrameworkTemplate';
+    print('zzzzzzz: $frameworkTemplatePath');
+
+    final libs = <String>[];
+    final sdkPath = await iOSSdk.findSdk();
+    final clangPath = await iOSSdk.findTool('clang');
+    final clangppPath = await iOSSdk.findTool('clang++');
+    final lipoPath = await iOSSdk.findTool('lipo');
+    final arPath = await iOSSdk.findTool('ar');
+    for (final abi in iOSSdk.abis) {
+      final abiOutDir = Directory(path.join(sdkOutDir, abi.triple));
+      print('Building for ${abi.triple} in $abiOutDir');
+      if (!abiOutDir.existsSync()) {
+        await abiOutDir.create(recursive: true);
+      }
+      // await _run('flutter', [
+      //   'pub',
+      //   'run',
+      //   'wasm:setup',
+      //   '-t',
+      //   abi.triple,
+      //   '-o',
+      //   abiOutDir.path,
+      //   '--clang',
+      //   clangPath,
+      //   '--clangpp',
+      //   clangppPath,
+      //   '--ar',
+      //   arPath,
+      //   '--sysroot',
+      //   sdkPath,
+      // ]);
+
+      // HACK
+      File('/Users/liama/libwasmer.dylib').copySync('/Users/liama/dev/wasm/flutter_wasm/example/.dart_tool/pub/bin/flutter_wasm/ios/build/iphonesimulator/x86_64-apple-ios/libwasmer.dylib');
+
+      libs.add(path.join(abiOutDir.path, inputLibName));
+    }
+    final fatLibPath = path.join(sdkOutDir, outputLibName);
+    print('Creating fat library for ${iOSSdk.xcodeName} at $fatLibPath');
+    await _run(lipoPath, ['-create', ...libs, '-output', fatLibPath]);
+    // final archivePath = sdkOutDir.resolve(archiveName).toFilePath();
+    // await _run(xcodebuildPath, [
+    //   'archive', '-scheme', 'WhatIsAScheme',
+    //   '-library', fatLibPath,
+    //   '-destination', 'generic/platform=${iOSSdk.xcodeName}',
+    //   '-archivePath', archivePath
+    //   ]);
+    final tempFrameworkPath = path.join(sdkOutDir, 'lib_wasm.framework');
+    copyDirectory(frameworkTemplatePath, tempFrameworkPath);
+    File(fatLibPath).copySync(path.join(tempFrameworkPath, 'lib_wasm'));
+    tempFrameworks.add(tempFrameworkPath);
+  }
+  final frameworkPath =
+      path.join(outDir.path, 'Frameworks/flutter_wasm.xcframework');
+  final frameworkDir = Directory(frameworkPath);
+  if (await frameworkDir.exists()) {
+    await frameworkDir.delete(recursive: true);
+  }
+  print('Creating framework at $frameworkPath');
+  await _run('xcrun', [
+    'xcodebuild',
+    '-create-xcframework',
+    for (final temp in tempFrameworks) ...['-framework', temp],
+    '-output',
+    frameworkPath,
+  ]);
+}

flutter_wasm/example/ios/.gitignore

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+**/dgph
+*.mode1v3
+*.mode2v3
+*.moved-aside
+*.pbxuser
+*.perspectivev3
+**/*sync/
+.sconsign.dblite
+.tags*
+**/.vagrant/
+**/DerivedData/
+Icon?
+**/Pods/
+**/.symlinks/
+profile
+xcuserdata
+**/.generated/
+Flutter/App.framework
+Flutter/Flutter.framework
+Flutter/Flutter.podspec
+Flutter/Generated.xcconfig
+Flutter/ephemeral/
+Flutter/app.flx
+Flutter/app.zip
+Flutter/flutter_assets/
+Flutter/flutter_export_environment.sh
+ServiceDefinitions.json
+Runner/GeneratedPluginRegistrant.*
+
+# Exceptions to above rules.
+!default.mode1v3
+!default.mode2v3
+!default.pbxuser
+!default.perspectivev3

flutter_wasm/example/ios/Flutter/AppFrameworkInfo.plist

@@ -0,0 +1,26 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
+<plist version="1.0">
+<dict>
+  <key>CFBundleDevelopmentRegion</key>
+  <string>en</string>
+  <key>CFBundleExecutable</key>
+  <string>App</string>
+  <key>CFBundleIdentifier</key>
+  <string>io.flutter.flutter.app</string>
+  <key>CFBundleInfoDictionaryVersion</key>
+  <string>6.0</string>
+  <key>CFBundleName</key>
+  <string>App</string>
+  <key>CFBundlePackageType</key>
+  <string>FMWK</string>
+  <key>CFBundleShortVersionString</key>
+  <string>1.0</string>
+  <key>CFBundleSignature</key>
+  <string>????</string>
+  <key>CFBundleVersion</key>
+  <string>1.0</string>
+  <key>MinimumOSVersion</key>
+  <string>9.0</string>
+</dict>
+</plist>

flutter_wasm/example/ios/Flutter/Debug.xcconfig

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+#include? "Pods/Target Support Files/Pods-Runner/Pods-Runner.debug.xcconfig"
+#include "Generated.xcconfig"

flutter_wasm/example/ios/Flutter/Release.xcconfig

@@ -0,0 +1,2 @@
+#include? "Pods/Target Support Files/Pods-Runner/Pods-Runner.release.xcconfig"
+#include "Generated.xcconfig"

flutter_wasm/example/ios/Podfile

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+# Uncomment this line to define a global platform for your project
+# platform :ios, '9.0'
+
+# CocoaPods analytics sends network stats synchronously affecting flutter build latency.
+ENV['COCOAPODS_DISABLE_STATS'] = 'true'
+
+project 'Runner', {
+  'Debug' => :debug,
+  'Profile' => :release,
+  'Release' => :release,
+}
+
+def flutter_root
+  generated_xcode_build_settings_path = File.expand_path(File.join('..', 'Flutter', 'Generated.xcconfig'), __FILE__)
+  unless File.exist?(generated_xcode_build_settings_path)
+    raise "#{generated_xcode_build_settings_path} must exist. If you're running pod install manually, make sure flutter pub get is executed first"
+  end
+
+  File.foreach(generated_xcode_build_settings_path) do |line|
+    matches = line.match(/FLUTTER_ROOT\=(.*)/)
+    return matches[1].strip if matches
+  end
+  raise "FLUTTER_ROOT not found in #{generated_xcode_build_settings_path}. Try deleting Generated.xcconfig, then run flutter pub get"
+end
+
+require File.expand_path(File.join('packages', 'flutter_tools', 'bin', 'podhelper'), flutter_root)
+
+flutter_ios_podfile_setup
+
+target 'Runner' do
+  use_frameworks!
+  use_modular_headers!
+
+  flutter_install_all_ios_pods File.dirname(File.realpath(__FILE__))
+end
+
+post_install do |installer|
+  installer.pods_project.targets.each do |target|
+    flutter_additional_ios_build_settings(target)
+  end
+end

flutter_wasm/example/ios/Podfile.lock

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+PODS:
+  - Flutter (1.0.0)
+  - flutter_wasm (0.0.1):
+    - Flutter
+
+DEPENDENCIES:
+  - Flutter (from `Flutter`)
+  - flutter_wasm (from `.symlinks/plugins/flutter_wasm/ios`)
+
+EXTERNAL SOURCES:
+  Flutter:
+    :path: Flutter
+  flutter_wasm:
+    :path: ".symlinks/plugins/flutter_wasm/ios"
+
+SPEC CHECKSUMS:
+  Flutter: 50d75fe2f02b26cc09d224853bb45737f8b3214a
+  flutter_wasm: a16d7dd9ea91bc62f163ba704fe5597905a347ac
+
+PODFILE CHECKSUM: aafe91acc616949ddb318b77800a7f51bffa2a4c
+
+COCOAPODS: 1.11.2