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callHackage: make 'all-cabal-hashes' repository overridable

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This commit changes callHackage to use a deterministic version of the Hackage
checkout from https://github.com/commercialhaskell/all-cabal-hashes by default.
This means that packages uploaded to Hackage after today will be available to
callHackage only after "pkgs/data/misc/hackage/default.nix" has been updated.

People who want the previous behavior where we always had the latest version of
Hackage available -- at the cost of frequent downloads from Github --, can add
the following override to their "~/.nixpkgs/config.nix" file:

  {
    packageOverrides = super: {
      all-cabal-hashes = builtins.fetchTarball "https://github.com/commercialhaskell/all-cabal-hashes/archive/hackage.tar.gz";
    };
  }
This commit is contained in:
Peter Simons
2016-11-01 18:29:43 +01:00
parent 0607fa1874
commit fac1168816
3 changed files with 16 additions and 11 deletions
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11
pkgs/data/misc/hackage/default.nix Normal file
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@@ -0,0 +1,11 @@
{ fetchFromGitHub }:
# Use builtins.fetchTarball "https://github.com/commercialhaskell/all-cabal-hashes/archive/hackage.tar.gz"
# instead if you want the latest Hackage automatically at the price of frequent re-downloads.
fetchFromGitHub {
owner = "commercialhaskell";
repo = "all-cabal-hashes";
rev = "ee101d34ff8bd59897aa2eb0a124bcd3fb47ceec";
sha256 = "1hky0s2c1rv1srfnhbyi3ny14rnfnnp2j9fsr4ylz76xyxgjf5wm";
}