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pkgsMusl, pkgsi686Linux, pkgsStatic: fix infinite recursion with overlays

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Consider example:

$ nix-instantiate ./nixos -A system --arg configuration '
    {
      boot.isContainer = true;
      nixpkgs.overlays = [ (self: super: {
        nix = self.pkgsStatic.nix;
      }) ];
    }'

When resolving package through overlays, we figure out that

  nix == self.pkgsStatic.nix
  =>
  nix == (import <nixpkgs> { inherit overlays; }).nix
  =>
  nix == (import <nixpkgs> { overlays = [(self: super: { nix = self.pkgsStatic.nix; })];}).nix

and we enter infinite recursion of nixpkgs evaluations.

The proper fix should terminate recursion by assigning self fixpoint
to inner custom package set. But I get infinite recursion somehow, so
I use `super`. It is less correct modulo deep custom overrides, but behaves
correctly for simple cases and doesn't OOM evaluator.

Fixes https://github.com/NixOS/nixpkgs/issues/57984
This commit is contained in:
danbst 2019-03-25 10:51:23 +02:00
parent 5699e8edc7
commit f72903864d
1 changed files with 9 additions and 0 deletions
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9
pkgs/top-level/stage.nix
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@ -135,6 +135,9 @@ let
# default GNU libc on Linux systems. Non-Linux systems are not
# supported.
pkgsMusl = if stdenv.hostPlatform.isLinux then nixpkgsFun {
overlays = [ (self': super': {
pkgsMusl = super';
})] ++ overlays;
${if stdenv.hostPlatform == stdenv.buildPlatform
then "localSystem" else "crossSystem"} = {
parsed = stdenv.hostPlatform.parsed // {
@ -151,6 +154,9 @@ let
# All packages built for i686 Linux.
# Used by wine, firefox with debugging version of Flash, ...
pkgsi686Linux = if stdenv.hostPlatform.isLinux && stdenv.hostPlatform.isx86 then nixpkgsFun {
overlays = [ (self': super': {
pkgsi686Linux = super';
})] ++ overlays;
${if stdenv.hostPlatform == stdenv.buildPlatform
then "localSystem" else "crossSystem"} = {
parsed = stdenv.hostPlatform.parsed // {
@ -176,6 +182,9 @@ let
# Fully static packages.
# Currently uses Musl on Linux (couldn’t get static glibc to work).
pkgsStatic = nixpkgsFun ({
overlays = [ (self': super': {
pkgsStatic = super';
})] ++ overlays;
crossOverlays = [ (import ./static.nix) ];
} // lib.optionalAttrs stdenv.hostPlatform.isLinux {
crossSystem = {