为什么ServiceStack Razor FileSystemWatcher在Mono + Mac OS X上不起作用? [英] Why doesn't the ServiceStack Razor FileSystemWatcher work on Mono + Mac OS X?

问题描述

ServiceStack对Razor v2的新支持使用FileSystemWatcher来检测对跟踪视图文件的更改并将其标记为无效，以便在下次请求时重新编译它们.

ServiceStack's new support for Razor v2 uses a FileSystemWatcher to detect changes to tracked view files and mark them as invalid so they'll be recompiled at the next request.

这非常适合调试，因为它可以让您编辑视图而不重建/重新启动项目.

This is great for debugging as it lets you edit your views and not rebuild/restart your project.

在我的Mac OS X(山狮)上的Mono(当前运行3.0.10)上，显然存在Mono错误，其中FileSystemWatcher不会引发文件更改的Changed事件.此外，即使IncludeSubdirectories设置为true，它也不会引发子目录中文件的任何事件.

On Mono (currently running 3.0.10) on my Mac OS X (Mountain Lion) there is apparently a Mono bug where the FileSystemWatcher doesn't raise Changed events for file changes. Furthermore, it also doesn't raise any events for files in a subdirectory, even if IncludeSubdirectories is set to true.

推荐答案

在对各种情况进行了调查和测试之后，我发现了一些针对Mono的较旧的错误报告，内容涉及FileSystemWatcher功能的失败.

After investigating and testing various things out, I found several older bug reports against Mono about failing FileSystemWatcher functionality.

该问题的解决方法可在Mono源代码中找到: https://github.com/mono /mono/blob/master/mcs/class/System/System.IO/FileSystemWatcher.cs

The workaround to the problem is found in the Mono source: https://github.com/mono/mono/blob/master/mcs/class/System/System.IO/FileSystemWatcher.cs

string managed = Environment.GetEnvironmentVariable ("MONO_MANAGED_WATCHER");
...
if (String.Compare (managed, "disabled", true) == 0)
    NullFileWatcher.GetInstance (out watcher);
else
    DefaultWatcher.GetInstance (out watcher);

如果将环境变量MONO_MANAGED_WATCHER设置为任何值(我将其设置为启用")，则它将使用DefaultWatcher这是一种托管实现，并且可以在Mac OS X上使用.

If you set the environment variable MONO_MANAGED_WATCHER to anything (I set it to "enabled") then it will use the DefaultWatcher which is a managed implementation, and it works on Mac OS X.

因此，在我的应用程序启动期间，我添加了:

So during my application startup, I added:

Environment.SetEnvironmentVariable("MONO_MANAGED_WATCHER", "enabled");

，瞧，保存新版本后，将重新编译我的Razor视图. :)

and voila, my Razor views are recompiled after I save a new version. :)

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