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base repository: NixOS/infra
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base: 2ca00527825d
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head repository: NixOS/infra
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compare: 369493ccc11a
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  • 1 commit
  • 1 file changed
  • 1 contributor

Commits on Nov 29, 2018

  1. Add an 'upgrade' helper which helps enforce upgrades are upgrades

    @grahamc @edolstra
    grahamc authored and edolstra committed Nov 29, 2018
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    369493c View commit details
Showing with 15 additions and 2 deletions.
  1. +15 −2 delft/overlay.nix
17 changes: 15 additions & 2 deletions delft/overlay.nix
View file
Original file line number Diff line number Diff line change
@@ -1,6 +1,19 @@
self: super:
{
nixUnstable = super.nixUnstable.overrideAttrs (oldatrs: {
let
upgrade = package: overrides:
let
upgraded = package.overrideAttrs overrides;
upgradedVersion = (builtins.parseDrvName upgraded.name).version;
originalVersion =(builtins.parseDrvName package.name).version;

isDowngrade = (builtins.compareVersions upgradedVersion originalVersion) == -1;

warn = builtins.trace
"Warning: ${package.name} downgraded by overlay with ${upgraded.name}.";
pass = x: x;
in (if isDowngrade then warn else pass) upgraded;
in {
nixUnstable = upgrade super.nixUnstable (oldAttrs: {
name = "nix-2.2pre6526_9f99d624";
src = self.fetchFromGitHub {
owner = "NixOS";