nixpkgs/pkgs/development/haskell-modules/make-package-set.nix
Will Fancher 8b764960e9 Added overrideScope for callPackageWith
Consequently removing several ad-hoc definitions of the same concept.
2017-07-13 14:56:13 -04:00

134 lines
5.2 KiB
Nix

# This expression takes a file like `hackage-packages.nix` and constructs
# a full package set out of that.
# required dependencies:
{ pkgs, stdenv, all-cabal-hashes }:
# arguments:
# * ghc package to use
# * package-set: a function that takes { pkgs, stdenv, callPackage } as first arg and `self` as second
# * extensible-self: the final, fully overriden package set usable with the nixpkgs fixpoint overriding functionality
{ ghc, package-set, extensible-self }:
# return value: a function from self to the package set
self: let
inherit (stdenv.lib) fix' extends makeOverridable callPackageWith;
inherit (import ./lib.nix { inherit pkgs; }) overrideCabal;
mkDerivationImpl = pkgs.callPackage ./generic-builder.nix {
inherit stdenv;
inherit (pkgs) fetchurl pkgconfig glibcLocales coreutils gnugrep gnused;
nodejs = pkgs.nodejs-slim;
jailbreak-cabal = if (self.ghc.cross or null) != null
then self.ghc.bootPkgs.jailbreak-cabal
else self.jailbreak-cabal;
inherit (self) ghc;
hscolour = overrideCabal self.hscolour (drv: {
isLibrary = false;
doHaddock = false;
hyperlinkSource = false; # Avoid depending on hscolour for this build.
postFixup = "rm -rf $out/lib $out/share $out/nix-support";
});
cpphs = overrideCabal (self.cpphs.overrideScope (self: super: {
mkDerivation = drv: super.mkDerivation (drv // {
enableSharedExecutables = false;
enableSharedLibraries = false;
doHaddock = false;
useCpphs = false;
});
})) (drv: {
isLibrary = false;
postFixup = "rm -rf $out/lib $out/share $out/nix-support";
});
};
mkDerivation = makeOverridable mkDerivationImpl;
mkScope = scope: pkgs // pkgs.xorg // pkgs.gnome2 // scope;
defaultScope = mkScope self;
callPackage = drv: args: callPackageWith defaultScope drv args;
withPackages = packages: callPackage ./with-packages-wrapper.nix {
inherit (self) llvmPackages;
haskellPackages = self;
inherit packages;
};
haskellSrc2nix = { name, src, sha256 ? null }:
let
sha256Arg = if isNull sha256 then "--sha256=" else ''--sha256="${sha256}"'';
in pkgs.stdenv.mkDerivation {
name = "cabal2nix-${name}";
buildInputs = [ pkgs.haskellPackages.cabal2nix ];
preferLocalBuild = true;
phases = ["installPhase"];
LANG = "en_US.UTF-8";
LOCALE_ARCHIVE = pkgs.lib.optionalString pkgs.stdenv.isLinux "${pkgs.glibcLocales}/lib/locale/locale-archive";
installPhase = ''
export HOME="$TMP"
mkdir -p "$out"
cabal2nix --compiler=${self.ghc.name} --system=${stdenv.system} ${sha256Arg} "${src}" > "$out/default.nix"
'';
};
hackage2nix = name: version: self.haskellSrc2nix {
name = "${name}-${version}";
sha256 = ''$(sed -e 's/.*"SHA256":"//' -e 's/".*$//' "${all-cabal-hashes}/${name}/${version}/${name}.json")'';
src = "${all-cabal-hashes}/${name}/${version}/${name}.cabal";
};
in package-set { inherit pkgs stdenv callPackage; } self // {
inherit mkDerivation callPackage haskellSrc2nix hackage2nix;
callHackage = name: version: self.callPackage (self.hackage2nix name version);
# Creates a Haskell package from a source package by calling cabal2nix on the source.
callCabal2nix = name: src: self.callPackage (self.haskellSrc2nix { inherit src name; });
# : Map Name (Either Path VersionNumber) -> HaskellPackageOverrideSet
# Given a set whose values are either paths or version strings, produces
# a package override set (i.e. (self: super: { etc. })) that sets
# the packages named in the input set to the corresponding versions
packageSourceOverrides =
overrides: self: super: pkgs.lib.mapAttrs (name: src:
let isPath = x: builtins.substring 0 1 (toString x) == "/";
generateExprs = if isPath src
then self.callCabal2nix
else self.callHackage;
in generateExprs name src {}) overrides;
# : { root : Path
# , source-overrides : Defaulted (Either Path VersionNumber)
# , overrides : Defaulted (HaskellPackageOverrideSet)
# } -> NixShellAwareDerivation
# Given a path to a haskell package directory whose cabal file is
# named the same as the directory name, an optional set of
# source overrides as appropriate for the 'packageSourceOverrides'
# function, and an optional set of arbitrary overrides,
# return a derivation appropriate for nix-build or nix-shell
# to build that package.
developPackage = { root, source-overrides ? {}, overrides ? self: super: {} }:
let name = builtins.baseNameOf root;
drv =
(extensible-self.extend (pkgs.lib.composeExtensions (self.packageSourceOverrides source-overrides) overrides)).callCabal2nix name root {};
in if pkgs.lib.inNixShell then drv.env else drv;
ghcWithPackages = selectFrom: withPackages (selectFrom self);
ghcWithHoogle = selectFrom:
let
packages = selectFrom self;
hoogle = callPackage ./hoogle.nix {
inherit packages;
};
in withPackages (packages ++ [ hoogle ]);
ghc = ghc // {
withPackages = self.ghcWithPackages;
withHoogle = self.ghcWithHoogle;
};
}