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Use all-cabal-hashes directly rather than extracting individual components #43

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Use all-cabal-hashes directly rather than extracting individual components #43

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25 changes: 18 additions & 7 deletions nix/build-support/stacklock2nix/default.nix
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Original file line number Diff line number Diff line change
Expand Up @@ -6,6 +6,7 @@
, runCommand
, stdenv
, path
, all-cabal-hashes
}@topargs:

{ # The path to your stack.yaml file.
Expand Down Expand Up @@ -82,7 +83,7 @@
# (instead of something like `fetchurl`) so that the repository is unzipped
# and untarred. stacklock2nix can still work with an all-cabal-hashes that is
# a tarball, but building will be faster with a plain directory.)
all-cabal-hashes ? null
all-cabal-hashes ? topargs.all-cabal-hashes
, callPackage ? topargs.callPackage
, # Path to Nixpkgs.
#
Expand Down Expand Up @@ -306,15 +307,25 @@ let
#
# This takes care of replaces the `.cabal` file from Hackage with the correct revision
# specified in the Hackage lock info.
pkgHackageInfoToNixHaskPkg = pkgHackageInfo: hfinal:
pkgHackageInfoToNixHaskPkg = {name, version, cabalFileHash, ...}: hfinal:
let
additionalArgs = getAdditionalCabal2nixArgs pkgHackageInfo.name pkgHackageInfo.version;
additionalArgs = getAdditionalCabal2nixArgs name version;
in
overrideCabalFileRevision
pkgHackageInfo.name
pkgHackageInfo.version
pkgHackageInfo.cabalFileHash
(hfinal.callHackage pkgHackageInfo.name pkgHackageInfo.version additionalArgs);
name
version
cabalFileHash
# Like callHackage from nixpkgs,
# but we don't call all-cabal-hashes-component
# to avoid excessive IFD
(hfinal.callPackage
(hfinal.haskellSrc2nix {
name = "${name}-${version}";
src = "${all-cabal-hashes}/${name}/${version}/${name}.cabal";
sha256 =''$(sed -e 's/.*"SHA256":"//' -e 's/".*$//' "${all-cabal-hashes}/${name}/${version}/${name}.json")'';
})
additionalArgs
);

# Return a derivation for a Haskell package for the given Haskell package
# lock info.
Expand Down
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