Doesn't look like anything like this has been implemented. The fetchFromGitHub (or fetchgit actually) machinery is here:
https://github.com/NixOS/nixpkgs/tree/master/pkgs/build-support/fetchgit 2016-07-19 16:52 GMT-04:00 Michiel Leenaars <[email protected]>: > Hi all, > > I was wondering if there is a recommended way to retrieve only a certain > path (or a set of paths) from a git repository as a source for a Nix > closure? The use case is working with a repository that is huge but only a > single > small folder is needed (a practical example is Google fonts on Github - > hundreds of Mb which is a bit much to store if all that is needed is a > single font such > as the Roboto font which is the default font of Android). fetchFromGitHub > and fetchgit seem to always copy the entire repository. > > git has an option for this (git archive, [1]) which seems to do exactly > what > I want - a checkout of only a single folder of a larger git repository - > and there are other options like a filter branch or a sparse-checkout. > I've grepped nixpkgs to see if there was any usage of git archive but > could not find it - as a user I would probably like to see something in > fetchFromGitHub with something like: > > url = fetchFromGitHub { > owner = "name"; > repo = "reallyhugerepo"; > rev = "revisionnumber"; > paths = [ "tinypath-a" "path-b" ]; > sha256 = > "22bfd184608ca00e38515c8d5d01d38460a66a503c75a35d0fea3e33559bb3b6" }; > > That seems like a reasonable and declarative way to specify what can be > discarded (a path in git archive can be a file or a folder with all the > files in it btw). > > Probably I'm not the first to think he needs this, and perhaps such a > thing is currently already possible? If so, I'd love any pointers ... If > this > is a bad or redundant idea, please also let me know ... > > Best, > Michiel > > [1] https://www.kernel.org/pub/software/scm/git/docs/git-archive.html > _______________________________________________ > nix-dev mailing list > [email protected] > http://lists.science.uu.nl/mailman/listinfo/nix-dev >
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