是否可以复制 xcode 派生数据缓存? [英] Is it possible to copy an xcode derived data cache?

问题描述

我们正在使用 Travis CI (travis-ci.com) 构建一个 xcode iOS 项目，我们的项目编译时间相当长(本地 5 分钟，travis CI 15 分钟).

We're using Travis CI (travis-ci.com) to build an xcode iOS project and our project compile time is quite lengthy (5 minutes locally and 15 minutes on travis CI).

为了减少编译时间，我们尝试使用 xcodebuild 参数 -derivedDataPath 缓存 DerivedData 内容，然后使用 travis 缓存(https://docs.travis-ci.com/user/caching/) 复制那个数据回来了.

To alleviate the compile time we have attempted to cache the DerivedData contents using xcodebuild argument -derivedDataPath and then use the travis cache (https://docs.travis-ci.com/user/caching/) to copy that data back.

问题是 xcode 似乎忽略了这个缓存数据.有谁知道强制 xcode 使用 -derivedDataPath 中的缓存数据的方法?

The problem is that xcode seems to ignore this cached data. Does anyone know a way to force xcode to use the cache data inside the -derivedDataPath?

推荐答案

Apple 回复了这个解决方案，我还没有测试过.

Apple replied with this solution, i have not yet tested it.

Apple Developer Relations 12 月 20 日工程有以下内容给您的反馈:

Apple Developer Relations Dec 20 Engineering has the following feedback for you:

文件修改时间将导致的预期行为重建.然而，在 Travis-CI 中，可能不是修改时间，而是导致派生数据的设备 inode 更改被认为是过时的.尝试设置:

It is expected behavior that file modification times will cause rebuilds. In Travis-CI, however, it may not be the modification times, but rather the device inode changes that are causing the derived data to be considered out of date. Try setting:

默认写入 com.apple.dt.XCBuild IgnoreFileSystemDeviceInodeChanges-bool 是

defaults write com.apple.dt.XCBuild IgnoreFileSystemDeviceInodeChanges -bool YES

或者在 xcodebuild 命令行上传递:

Or pass it on the xcodebuild command-line:

IgnoreFileSystemDeviceInodeChanges=1 xcodebuild ...

IgnoreFileSystemDeviceInodeChanges=1 xcodebuild …

我们现在关闭此错误报告.

We are now closing this bug report.

如果您对决议有任何疑问或意见，请更新包含该信息的错误报告，以便我们做出回应.

If you have questions or comments about the resolution, please update your bug report with that information so we can respond.

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