On Tue, Jan 31, 2012 at 11:15:36AM +0100, Eelco Dolstra wrote: > Hi, > > On 31/01/12 08:51, Yury G. Kudryashov wrote: > > >>> IHMO, this program should be run by the default builder after $out has > >>> been set up, to remove redundancy in the generated closures. > >> > >> No, Nix should do that after the build has completed. If the Nix DB were > >> to store the cryptographic hash of every regular file in the store > > Just create /nix/store/by-hash/first-5-digits/next-5-digits/remaining- > > digits/number and hardlink every file to this path. Here <number> will be 0 > > for most files, and increase only in case of file collisions. > > How would that be easier than adding a table to the SQLite DB? > > In particular, the existence of /nix/store/by-hash/... would prevent files > from > being deleted if there are no more store paths referring to it, because the > number of hard links would still be 1.
I think there is the chain of trust... Trusting the typical filesystem operations at /nix/store looks to me a bit different than trusting the filesystem *plus* the sqlite db. I imagine that the cases of broken dbs would be noticed. If it were an optional feature, perfect. Regards, Lluís. _______________________________________________ nix-dev mailing list [email protected] http://lists.science.uu.nl/mailman/listinfo/nix-dev
