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1lib: prev:
2
3let
4 # Removing recurseForDerivation prevents derivations of aliased attribute
5 # set to appear while listing all the packages available.
6 removeRecurseForDerivations =
7 alias:
8 if alias.recurseForDerivations or false then
9 lib.removeAttrs alias [ "recurseForDerivations" ]
10 else
11 alias;
12
13 # Disabling distribution prevents top-level aliases for non-recursed package
14 # sets from building on Hydra.
15 removeDistribute = alias: if lib.isDerivation alias then lib.dontDistribute alias else alias;
16
17 # Make sure that we are not shadowing something from
18 # writers.
19 checkInPkgs =
20 n: alias: if builtins.hasAttr n prev then throw "Alias ${n} is still in writers" else alias;
21
22 mapAliases =
23 aliases:
24 lib.mapAttrs (
25 n: alias: removeDistribute (removeRecurseForDerivations (checkInPkgs n alias))
26 ) aliases;
27
28in
29mapAliases ({
30 # Cleanup before 22.05, Added 2021-12-11
31 writePython2 = "Python 2 is EOL and the use of writers.writePython2 is deprecated.";
32 writePython2Bin = "Python 2 is EOL and the use of writers.writePython2Bin is deprecated.";
33})