alexandria/2024/nix/lib/parsePkgs.nix

36 lines
1.4 KiB
Nix

{ pkgs, callTypstProject, ... }:
baseDirectory:
let
inherit (pkgs) lib;
inherit (lib.attrsets)
mapAttrs
mapAttrsToList
mergeAttrsList
;
inherit (builtins) readDir;
in
let
# Package files for a single shard
# Type: String -> String -> AttrsOf Path
namesForShard =
shard: type:
if type != "directory" then
# Ignore all non-directories. Technically only README.md is allowed as a file in the base directory, so we could alternatively:
# - Assume that README.md is the only file and change the condition to `shard == "README.md"` for a minor performance improvement.
# This would however cause very poor error messages if there's other files.
# - Ensure that README.md is the only file, throwing a better error message if that's not the case.
# However this would make for a poor code architecture, because one type of error would have to be duplicated in the validity checks and here.
# Additionally in either of those alternatives, we would have to duplicate the hardcoding of "README.md"
{ }
else
mapAttrs (name: _: baseDirectory + "/${shard}/${name}/package.nix") (
readDir (baseDirectory + "/${shard}")
);
in
# mapAttrs (a: b: builtins.trace (builtins.tryEval a) b) (
# mergeAttrsList (mapAttrsToList namesForShard (readDir baseDirectory))
# )
mapAttrs (a: b: callTypstProject (import (/. + b))) (
mergeAttrsList (mapAttrsToList namesForShard (readDir baseDirectory))
)