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Change Nix file to work with multiple versions

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Silvan Mosberger 2019-05-22 20:02:39 +02:00
parent 536ca14796
commit b8c0a965e1
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1 changed files with 23 additions and 18 deletions
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default.nix
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@ -19,7 +19,7 @@ let
});
};
ghcSpecific = ghcVersion: rec {
ghcSpecific = buildName: ghcVersion: rec {
# Reformats the ghc version into the format "8.6.4"
versionString = lib.concatStringsSep "."
@ -32,7 +32,7 @@ let
# Evaluates to a nixpkgs that has the given ghc version in it
pkgs = let
rev = builtins.readFile (./nixpkgsForGhc + "/${ghcVersion}");
sha256 = builtins.readFile (./generated/nixpkgsHashes + "/${rev}");
sha256 = builtins.readFile (./generated + "/${buildName}/nixpkgsHashes/${rev}");
in import (fetchTarball {
url = "https://github.com/NixOS/nixpkgs/tarball/${rev}";
inherit sha256;
@ -42,7 +42,7 @@ let
# (minus a select few)
baseLibraryNuller = self: super: let
libs = lib.splitString " "
(builtins.readFile (./generated/ghcBaseLibraries + "/${ghcVersion}"));
(builtins.readFile (./generated + "/${buildName}/ghcBaseLibraries/${ghcVersion}"));
libNames = map (lib: (builtins.parseDrvName lib).name) libs;
# It seems that some versions require Cabal and some don't
filtered = lib.filter (name: ! lib.elem name [ "ghc" "Cabal" ]) libNames;
@ -57,10 +57,10 @@ let
# Build for a specific GHC version
hieBuild = ghcVersion: let
forGhc = ghcSpecific ghcVersion;
hieBuild = buildName: ghcVersion: let
forGhc = ghcSpecific buildName ghcVersion;
hlib = forGhc.pkgs.haskell.lib;
revision = builtins.readFile ./generated/stack2nix/revision;
revision = builtins.readFile (./generated + "/${buildName}/stack2nix/revision");
hieOverride = self: super: {
haskell-ide-engine = (hlib.overrideCabal super.haskell-ide-engine (old: {
@ -103,7 +103,7 @@ let
];
};
expr = import (./generated/stack2nix + "/${ghcVersion}.nix") {
expr = import (./generated + "/${buildName}/stack2nix/${ghcVersion}.nix") {
pkgs = forGhc.pkgs;
};
@ -114,16 +114,15 @@ let
# { stable = { ghc864 = <derivation ..>; ... }; unstable = ...; }
# Each of which contain binaries hie and hie-$major.$minor.$patch for their
# GHC version, along with a hie-wrapper binary that knows about this version
allVersions =
allVersions = lib.mapAttrs (buildName: _:
let ghcVersionFiles = lib.filterAttrs (file: _: file != "revision")
(builtins.readDir ./generated/stack2nix);
(builtins.readDir (./generated + "/${buildName}/stack2nix"));
in lib.mapAttrs' (ghcVersionFile: _:
let ghcVersion = lib.removeSuffix ".nix" ghcVersionFile;
in lib.nameValuePair ghcVersion (hieBuild ghcVersion)
) ghcVersionFiles;
in lib.nameValuePair ghcVersion (hieBuild buildName ghcVersion)
) ghcVersionFiles) (builtins.readDir ./generated);
# Combine a set of HIE versions (given as { <ghcVersion> = <derivation>; })
# into a single derivation with the following binaries:
@ -180,11 +179,17 @@ let
'';
};
in {
inherit combined;
versions = allVersions;
selection = { selector }: combined (selector allVersions);
latest = lib.last (lib.attrValues allVersions);
# Generates a set with the utility functions from a set of versions
mkSet = versions: {
inherit combined versions;
selection = { selector }: combined (selector versions);
latest = lib.last (lib.attrValues versions);
};
in mkSet allVersions.stable
// lib.mapAttrs (_: mkSet) (builtins.removeAttrs allVersions ["stable"])
// {
# Stable, but fall back to unstable if stable doesn't have a certain GHC
# version
unstableFallback = mkSet (allVersions.unstable // allVersions.stable);
}