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Put v1 compatibility back and fix warning (#714)

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* Revert "Remove backwards compatibility with V1 code (#710)"
* Fix issue with warning not being displayed
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Hamish Mackenzie 2020-06-20 17:38:22 +12:00 committed by GitHub
parent 6c41c299c5
commit 22aa3506c0
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1 changed files with 54 additions and 31 deletions
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85
default.nix
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@ -1,33 +1,56 @@
{ checkMaterialization ? false # Allows us to easily switch on materialization checking
, defaultCompilerNixName ? null # Quick way to override the default compiler e.g. "ghc883"
, system ? builtins.currentSystem
, sourcesOverride ? {}
, ... }@args: rec {
sources = (import ./nix/sources.nix) // sourcesOverride;
let haskellNix = {
checkMaterialization ? false, # Allows us to easily switch on materialization checking
defaultCompilerNixName ? null, # Quick way to override the default compiler e.g. "ghc883"
system ? builtins.currentSystem,
sourcesOverride ? {},
... }@args: rec {
sources = (import ./nix/sources.nix) // sourcesOverride;
config = import ./config.nix;
overlays = [ allOverlays.combined ] ++ (
if checkMaterialization == true
then [(
final: prev: {
haskell-nix = prev.haskell-nix // {
checkMaterialization = true;
};
}
)]
else []
) ++ (
if defaultCompilerNixName != null
then [(
final: prev: {
haskell-nix = prev.haskell-nix // {
inherit defaultCompilerNixName;
};
}
)]
else []
);
allOverlays = import ./overlays args;
nixpkgsArgs = { inherit config overlays system; };
pkgs = import sources.nixpkgs-default nixpkgsArgs;
config = import ./config.nix;
overlays = [ allOverlays.combined ] ++ (
if checkMaterialization == true
then [(
final: prev: {
haskell-nix = prev.haskell-nix // {
checkMaterialization = true;
};
}
)]
else []
) ++ (
if defaultCompilerNixName != null
then [(
final: prev: {
haskell-nix = prev.haskell-nix // {
inherit defaultCompilerNixName;
};
}
)]
else []
);
allOverlays = import ./overlays args;
nixpkgsArgs = { inherit config overlays system; };
pkgs = import sources.nixpkgs-default nixpkgsArgs;
};
v1DeprecationMessage = "Version 1 is deprecated: use version 2 (nixpkgs arguments are available as the `nixpkgsArgs` attribute of version 2)";
haskellNixV1 = (haskellNix {}).nixpkgsArgs // {
overlays = builtins.trace v1DeprecationMessage (haskellNix {}).nixpkgsArgs.overlays;
};
haskellNixV2 = haskellNix;
# If no arguments, then you get V1
in haskellNixV1 // {
__functor = _: {
version ? 2,
checkMaterialization ? false, # Allows us to easily switch on materialization checking
defaultCompilerNixName ? null, # Quick way to override the default compiler e.g. "ghc883"
system ? builtins.currentSystem,
sourcesOverride ? {},
... }@args:
if version == 1
then haskellNixV1
else if version == 2
then haskellNixV2 args
else builtins.throw ("haskell.nix: unknown version: " + (builtins.toString version));
}