flutter 1.17升级

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升级

最近官方发布了flutter 稳定版本1.17.0 ，记录下升级1.17 ios上碰到的的问题

App产物

在 1.12.13 的时候，为了支持模拟器运行，会进行 debug 产物 跟 release 产物的merge （lipo create …）
debug 产物 x86 、release 产物 arm64 arm7

升级到1.17.0 之后 ，merge报错

IMAGE

lipo 查看下

IMAGE

发现针对模拟器的debug产物 含有arm64

Debug Flutter tool源码， build 里面进行了两次createStubAppFramework（iphone && simulator）
然后做了merge，实际上environment参数里面 iosArchs只有 arch x86，所以问题出在这里

DebugUniveralFramework

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@override
Future<void> build(Environment environment) async {
  // Generate a trivial App.framework.
  final Set<DarwinArch> iosArchs = environment.defines[kIosArchs]
    ?.split(' ')
    ?.map(getIOSArchForName)
    ?.toSet()
    ?? <DarwinArch>{DarwinArch.arm64};
  final File iphoneFile = environment.buildDir.childFile('iphone_framework');
  final File simulatorFile = environment.buildDir.childFile('simulator_framework');
  final File lipoOutputFile = environment.buildDir.childFile('App');
  final RunResult iphoneResult = await createStubAppFramework(
    iphoneFile,
    SdkType.iPhone,
    // Only include 32bit if it is contained in the active architectures.
    include32Bit: iosArchs.contains(DarwinArch.armv7)
  );
  final RunResult simulatorResult = await createStubAppFramework(
    simulatorFile,
    SdkType.iPhoneSimulator,
  );
  if (iphoneResult.exitCode != 0 || simulatorResult.exitCode != 0) {
    throw Exception('Failed to create App.framework.');
  }
  final List<String> lipoCommand = <String>[
    'xcrun',
    'lipo',
    '-create',
    iphoneFile.path,
    simulatorFile.path,
    '-output',
    lipoOutputFile.path
  ];
  final RunResult lipoResult = await processUtils.run(
    lipoCommand,
  );

  if (lipoResult.exitCode != 0) {
    throw Exception('Failed to create App.framework.');
  }
}

解决办法 可以通过archs 判断下具体执行 

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@override
  Future<void> build(Environment environment) async {
    // Generate a trivial App.framework.
    final Set<DarwinArch> iosArchs = environment.defines[kIosArchs]
      ?.split(' ')
      ?.map(getIOSArchForName)
      ?.toSet()
      ?? <DarwinArch>{DarwinArch.arm64};
    final File iphoneFile = environment.buildDir.childFile('iphone_framework');
    final File simulatorFile = environment.buildDir.childFile('simulator_framework');
    final File lipoOutputFile = environment.buildDir.childFile('App');

    RunResult iphoneResult;

    if(iosArchs.contains(DarwinArch.arm64) || iosArchs.contains(DarwinArch.armv7)) {
      iphoneResult = await createStubAppFramework(
          iphoneFile,
          SdkType.iPhone,
          // Only include 32bit if it is contained in the active architectures.
          include32Bit: iosArchs.contains(DarwinArch.armv7)
      );
      if (iphoneResult.exitCode != 0) {
        throw Exception('(iphoneResult)Failed to create App.framework.');
      }
    }

    RunResult simulatorResult;

    if(iosArchs.contains(DarwinArch.x86_64)) {
      simulatorResult = await createStubAppFramework(
        simulatorFile,
        SdkType.iPhoneSimulator,
      );
      if (simulatorResult.exitCode != 0) {
        throw Exception('(simulatorResult)Failed to create App.framework.');
      }
    }

    if(simulatorResult == null) {
      iphoneFile.copySync(lipoOutputFile.path);
      return;
    }

    if(iphoneResult == null) {
      simulatorFile.copySync(lipoOutputFile.path);
      return;
    }

    final List<String> lipoCommand = <String>[
      'xcrun',
      'lipo',
      '-create',
      iphoneFile.path,
      simulatorFile.path,
      '-output',
      lipoOutputFile.path
    ];
    final RunResult lipoResult = await processUtils.run(
      lipoCommand,
    );

    if (lipoResult.exitCode != 0) {
      throw Exception('Failed to create App.framework.');
    }
  }

突然想到 既然1.17 对debug 产物做了arm64的支持，那我们收集产物是不是可以不用自己做merge，发现是不可以的
因为除了App.framework,还有plugin native代码生成的pod静态库 libxxx.a。
静态库 是哪里生成的呢？

这里 build_ios.dart -> buildXcodeProject 

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...

final List<String> buildCommands = <String>[
  '/usr/bin/env',
  'xcrun',
  'xcodebuild',
  '-configuration', configuration,
];  

...

if (buildForDevice) {
  buildCommands.addAll(<String>['-sdk', 'iphoneos']);
} else {
  buildCommands.addAll(<String>['-sdk', 'iphonesimulator', '-arch', 'x86_64']);
}

...

这里只针对x86做了xcode build，所以还是要自己merge的…

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