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https://issues.apache.org/jira/browse/VFS-536?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14264959#comment-14264959
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Sam Halliday commented on VFS-536:
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Good news, it looks like 2.1-SNAPSHOT fixes the issue that we had (although it
is always possible that sbt changed the semantics of their `clean compile`
operation)
> DefaultFileMonitor will ignore files forever if directory is deleted and
> recreated
> ----------------------------------------------------------------------------------
>
> Key: VFS-536
> URL: https://issues.apache.org/jira/browse/VFS-536
> Project: Commons VFS
> Issue Type: Bug
> Affects Versions: 2.0
> Reporter: Sam Halliday
>
> We're using VFS2 in our emacs scala ide
> https://github.com/ensime/ensime-server
> Unfortunately, I've just discovered that if we watch a directory, e.g. here
> we are watching the target directory for class files that are created by a
> compiler
>
> https://github.com/ensime/ensime-server/blob/master/src/main/scala/org/ensime/indexer/FileWatchers.scala#L28
> then if the directory is deleted and recreated (as is done by the SBT scala
> build tool!) then monitoring events are ignored forever!
> I can confirm that file watching works fine if individual files are added or
> removed.
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