pyrox.dev
Haskell: experiment with importing a generated hackage-packages.nix file
+90
pkgs/development/haskell-modules/generate-hackage-package-set.nix
+90
pkgs/development/haskell-modules/generate-hackage-package-set.nix
···
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{ pkgs ? (import <nixpkgs> {}).pkgs
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, lib ? pkgs.lib
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, stdenv ? pkgs.stdenv
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}:
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let
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nixpkgs = pkgs.fetchFromGitHub {
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owner = "peti";
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repo = "nixpkgs";
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rev = "b558bfa7d1e820904ff9d7bbc1f02ad51f690e34";
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sha256 = "1n1hicnn5mybd9cm7s2my5ayphsy0hhjv6bc4xcb1v9rpcm8pm16";
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};
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cabal2nix = pkgs.fetchFromGitHub {
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owner = "NixOS";
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repo = "cabal2nix";
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rev = "116145753cbf05572c127e00d8616385f8faa378";
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sha256 = "16zvxs2hjv7wvl1hmwq3v272rc9r6ind2vlcvdx29f3risxpjzkp";
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};
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hackage = pkgs.fetchFromGitHub {
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owner = "commercialhaskell";
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repo = "all-cabal-hashes";
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rev = "85f28bd0d000706c29f78275100dddd7c1c6c2f6";
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sha256 = "0w41lzkjvndcpscn5lyb8vvxpvq0kbg5ggdsk31167psa1g32hrz";
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};
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lts-haskell = pkgs.fetchFromGitHub {
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owner = "fpco";
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repo = "lts-haskell";
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rev = "89c3b45370ec1742d9e029ff4e5271316031b84b";
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sha256 = "0w3cz19g0h8dfxjpwf28rzj0xska11cbn5in5835ss2ypmbr2lwr";
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};
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stackage-nightly = pkgs.fetchFromGitHub {
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owner = "fpco";
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repo = "stackage-nightly";
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rev = "98e337bf6bf8efb772babe252e3f0027d8b6f859";
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sha256 = "1dmc8y72np2np3zrvdl61x539yw3qi4fpyyswib29j0h90pwj93p";
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};
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haskellPackages = pkgs.haskell.packages.bootstrap.override {
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overrides = self: super: {
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distribution-nixpkgs = super.distribution-nixpkgs.overrideDerivation (old: { src = cabal2nix; });
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cabal2nix = super.cabal2nix.overrideDerivation (old: { src = cabal2nix; });
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hackage2nix = super.hackage2nix.overrideDerivation (old: { src = cabal2nix; });
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};
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};
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in
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stdenv.mkDerivation {
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name = "haskell-update-0";
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buildInputs = [ haskellPackages.hackage2nix pkgs.nix ];
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src = [ nixpkgs ];
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buildPhase = ''
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# Processing Hackage requires UTF-8 support.
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export LANG="en_US.UTF-8"
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${lib.optionalString stdenv.isLinux ''export LOCALE_ARCHIVE="${pkgs.glibcLocales}/lib/locale/locale-archive"''}
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# hackage2nix runs nix-env to determine the set of visible package names.
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export NIX_STORE_DIR="$TMPDIR/nix/store" NIX_STATE_DIR="$TMPDIR/nix/var"
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# Build the preferred-versions file.
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for i in "${hackage}/"*/preferred-versions; do
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cat >>$TMPDIR/preferred-versions "$i"
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echo >>$TMPDIR/preferred-versions
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done
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# Generate the updated Haskell package set and LTS configuration files.
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hackage2nix +RTS -M6G -RTS \
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--nixpkgs="$PWD" --preferred-versions="$TMPDIR/preferred-versions" \
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--hackage="${hackage}" --lts-haskell="${lts-haskell}" \
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--stackage-nightly="${stackage-nightly}"
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'';
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doCheck = true;
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checkPhase = ''
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# Verify that all Haskell packages still evaluate properly.
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nix-env -qaP -f "$PWD" -A haskellPackages >/dev/null
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'';
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installPhase = ''
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mkdir -p "$out"
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cp pkgs/development/haskell-modules/hackage-packages.nix "$out/"
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cp pkgs/development/haskell-modules/configuration-lts-*.nix "$out/"
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'';
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}