Copying a build directory preserving cached work

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Michael Armbrust

Jul 1, 2016, 2:38:27 PM7/1/16

I'm trying to set up some cross machine parallel testing infrastructure.  The goal would be to take an SBT project, compile it once and then tar up the whole thing.  Then I could untar it on a couple machines and run tests, skipping the compilation step.

The issue I'm hitting is that when I untar my project, some thing has invalidated all of the work done, and SBT is recompiling everything from scratch.

Any ideas on what I'm doing wrong?  This SBT 0.13.11.


Jean-Rémi Desjardins

Jul 1, 2016, 3:42:32 PM7/1/16
Hi Michael,

Distributed test execution on a cluster of computers would be awesome. I hope you can expose this as an sbt plugin. This would hugely benefit the community and I am sure you could find a small community of contributors to help maintain the plugin. If this is what you are aiming for, best of luck and be sure to announce the plugin so that I can have a look at it and potentially contribute to it.

Unfortunately, I don’t know why after decompressing the project, things are being recompiled. My guess is that it screws up with how sbt detects whether or not a file was changed. Perhaps there is another way of sending the required information that does not require compressing the entire project on disk.


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