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pkgs/overlays/unstable-from-source: allow to provide callPackage

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that means that you can build package from unstable,
while using dependencies for a given unstable package from stable

needs more testing with nested packages and package sets,
but I don't see why it wouldn't work
This commit is contained in:
Wroclaw 2025-06-01 18:48:45 +02:00
parent a3735e02a9
commit 955083407e
1 changed files with 34 additions and 1 deletions
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35
pkgs/overlays/unstable-from-source.nix
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@ -1,10 +1,21 @@
{
unstableSource,
attributeName ? "unstable",
# callPackage :: function | boolean
callPackage ? false,
}:
self: super:
assert self.lib.assertMsg (
self.lib.isFunction callPackage
|| self.lib.isBool callPackage
) ''
callPackage argument should be a function or a boolean.
If you want to use the callPackage from self, set it to true.
If you want to use a custom callPackage, set it to a function (pkgs.callPackage).
'';
let
useUnstable = self.config.useUnstable or true;
sanitizePlatform = platformConfig: self.lib.removeAttrs platformConfig [
@ -34,7 +45,29 @@ let
# when crossSystem is passed.
crossSystem = sanitizePlatform self.stdenv.hostPlatform;
};
callPackage' = if builtins.isFunction callPackage then callPackage
else if builtins.isBool callPackage && callPackage then self.callPackage
else if builtins.isBool callPackage && !callPackage then throw "this should never be evaluated"
else throw "callPackage should be a function (callPackage) or a boolean";
callPackagesUnstablePkgs = self.lib.mapAttrsRecursiveCond (
attrset: !(self.lib.hasAttr "override" attrset) && attrset.recurseForDerivations or false
) (
_: unstablePackage: callPackage' {
# For some reason, override functor of the package has its argument set as required,
# which is totally false! the override functor can take all of those arguemnts optionally.
__functionArgs = self.lib.mapAttrs (_: _: true) (self.lib.functionArgs unstablePackage.override);
__functor =
if builtins.isFunction unstablePackage.override then unstablePackage.override
else unstablePackage.override.__functor;
} {}
) unstablePkgs;
in
{
"${attributeName}" = if useUnstable then unstablePkgs else self;
"${attributeName}" = if !useUnstable then self
# if callPackage is not false
else if builtins.isBool callPackage && !callPackage then callPackagesUnstablePkgs
else unstablePkgs;
}