BuildStream-Migration-Bot opened a new issue #19:
URL: https://github.com/apache/buildstream/issues/19


   [See original issue on 
GitLab](https://gitlab.com/BuildStream/buildstream/-/issues/19)
   In GitLab by [[Gitlab user @tristanvb]](https://gitlab.com/tristanvb) on Apr 
29, 2017, 06:57
   
   During each build, and at other times; we stage artifacts to a sandbox and 
then run a series of integration commands in the sandbox where the rootfs needs 
to be read-write. Integration commands can include things like `ldconfig`, 
`fc-cache`, `glib-compile-schemas` etc.
   
   Because the ostree artifacts are extracted with hardlinks, and the 
individual extracts are subsequently staged using hardlinks; the sandbox 
directory rootfs is consequently populated with hardlinks which link back into 
the ostree repositories, so modifying those files in place will result in 
corruption of artifacts.
   
   To address this, the current plan is to use fusepy in the sandbox 
implementation to provide a copy-on-write experience for any hardlinked files. 
This should only be necessary while the sandbox is running with a read-write 
rootfs, in other scenarios once the rootfs is integrated then the rootfs is 
read-only and this is not necessary.


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