Shea Levy <[email protected]> skribis: > On Mon, Apr 14, 2014 at 04:59:15PM +0200, Ludovic Courtès wrote: >> [email protected] (Ludovic Courtès) skribis: >> >> > Shea Levy <[email protected]> skribis: >> > >> >> On Mon, Apr 14, 2014 at 03:38:01PM +0200, Ludovic Courtès wrote: >> >>> The patch below allows files such as /nix/store/foo to be protected from >> >>> GC if a root refers to them. This makes it easy for a build hook to use >> >>> such files for its temporary working files. >> >>> >> >>> WDYT? >> >>> >> >> >> >> It seems a bit odd to me to be using the store as a temporary file >> >> location. What's wrong with $TMPDIR? >> > >> > Well, this is useful for build hooks, because it guarantees that any >> > garbage they leave there will eventually be reclaimed. >> >> It also guarantees that this thing lives on the same file system as the >> store, which means that rename(2) can be used to move it to its final >> location in the store. >> > > Hmm using the store as an auto-collected $TMPDIR seems wrong, but this > is a decent argument. Do you have a specific use case already planned?
Yup, the build hook, as I wrote (specifically, for the temporary it uses when restoring from a Nar.) The other option is to use the temporary root file (that’s what build-remote.pl does.) That’s nice, but it requires exposing a lot of implementation details (GC lock, GC roots directory, etc.) Ludo’. _______________________________________________ nix-dev mailing list [email protected] http://lists.science.uu.nl/mailman/listinfo/nix-dev
