core/pkgs/build-support/writers/aliases.nix

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2024-05-02 00:46:19 +00:00
lib: prev:
let
# Removing recurseForDerivation prevents derivations of aliased attribute
# set to appear while listing all the packages available.
removeRecurseForDerivations = alias: with lib;
if alias.recurseForDerivations or false then
removeAttrs alias ["recurseForDerivations"]
else alias;
# Disabling distribution prevents top-level aliases for non-recursed package
# sets from building on Hydra.
removeDistribute = alias: with lib;
if isDerivation alias then
dontDistribute alias
else alias;
# Make sure that we are not shadowing something from
# writers.
checkInPkgs = n: alias: if builtins.hasAttr n prev
then throw "Alias ${n} is still in writers"
else alias;
mapAliases = aliases:
lib.mapAttrs (n: alias: removeDistribute
(removeRecurseForDerivations
(checkInPkgs n alias)))
aliases;
in
mapAliases ({
/* Cleanup before 22.05, Added 2021-12-11 */
writePython2 = "Python 2 is EOL and the use of writers.writePython2 is deprecated.";
writePython2Bin = "Python 2 is EOL and the use of writers.writePython2Bin is deprecated.";
})