After upgrading to IDEA 2017.3.4 I have found a new file in the .idea folder: hydra.xml. Its contents:

<?xml version="1.0" encoding="UTF-8"?>
<project version="4">
<component name="HydraSettings">
<option name="projectRoot" value="C:\Some\absolute\path\to\my\project" />

I have spend some time to find out who creates this file, so it would be nice to have some clues that it's some of Scala plug-in configuration.

Should it be added to VCS or ignored?

Note that it contains absolute path to my project (should I report an issue?).


UPD: I have created the issue after a while: https://youtrack.jetbrains.com/issue/SCL-13438

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This file is created by the Hydra compiler support which has recently beed added to the Scala plugin. If you do not use this feature, it is safe to ignore the file.


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