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callHackage: Keep deriver, like callCabal2nix

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This commit is contained in:
Will Fancher 2018-03-25 03:12:28 -04:00
parent 275cd49731
commit 155dfe385e
1 changed files with 15 additions and 4 deletions
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19
pkgs/development/haskell-modules/make-package-set.nix
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@ -136,13 +136,26 @@ let
src = "${component}/${name}.cabal";
};
# Adds a nix file as an input to the haskell derivation it
# produces. This is useful for callHackage / callCabal2nix to
# prevent the generated default.nix from being garbage collected
# (requiring it to be frequently rebuilt), which can be an
# annoyance.
callPackageKeepDeriver = src: args:
overrideCabal (self.callPackage src args) (orig: {
preConfigure = ''
# Generated from ${src}
${orig.preConfigure or ""}
'';
});
in package-set { inherit pkgs stdenv callPackage; } self // {
inherit mkDerivation callPackage haskellSrc2nix hackage2nix;
inherit (haskellLib) packageSourceOverrides;
callHackage = name: version: self.callPackage (self.hackage2nix name version);
callHackage = name: version: callPackageKeepDeriver (self.hackage2nix name version);
# Creates a Haskell package from a source package by calling cabal2nix on the source.
callCabal2nix = name: src: args: let
@ -155,10 +168,8 @@ in package-set { inherit pkgs stdenv callPackage; } self // {
then pkgs.lib.cleanSourceWith { inherit src filter; }
else src;
};
in overrideCabal (self.callPackage expr args) (orig: {
in overrideCabal (callPackageKeepDeriver expr args) (orig: {
inherit src;
preConfigure =
"# Generated from ${expr}\n${orig.preConfigure or ""}";
});
# : { root : Path