Hello!
Sorry; I don’t know how to word the title correctly. I have a custom lib module here:
with builtins; { lib, extras ? {} }: with lib; let
newLib = self: recursiveUpdate extras (rec {
foldToSet = list: foldr (new: old: recursiveUpdate new old) {} (filter isAttrs list);
foldToSet' = list: foldr (new: old: new // old) {} (filter isAttrs list);
mif = {
list = condition: value: optionals condition value;
list' = condition: value: optional condition value;
set = condition: value: optionalAttrs condition value;
num = condition: value: if condition then value else 0;
null = condition: value: if condition then value else null;
str = condition: value: optionalString condition value;
};
dirCon = let
ord = dir: func: filterAttrs func (if (isAttrs dir) then dir else (readDirExists dir));
in rec {
attrs = {
dirs = dir: ord dir (n: v: v == "directory");
others = dir: ord dir (n: v: v != "directory");
files = dir: ord dir (n: v: v == "regular");
sym = dir: ord dir (n: v: v == "symlink");
unknown = dir: ord dir (n: v: v == "unknown");
};
dirs = dir: attrNames (attrs.dirs dir);
others = dir: attrNames (attrs.others dir);
files = dir: attrNames (attrs.files dir);
sym = dir: attrNames (attrs.sym dir);
unknown = dir: attrNames (attrs.unknown dir);
};
attrs = rec {
configs = {
nixpkgs = {
allowUnfree = true;
allowBroken = true;
allowUnsupportedSystem = true;
# preBuild = ''
# makeFlagsArray+=(CFLAGS="-w")
# buildFlagsArray+=(CC=cc)
# '';
permittedInsecurePackages = [
"python2.7-cryptography-2.9.2"
];
};
};
platforms = {
arm = [ "aarch64-linux" "armv7l-linux" "armv6l-linux" ];
imd = [ "i686-linux" "x86_64-linux" ];
};
versions = {
python = rec {
two' = "7";
three' = "10";
two = "python2${two'}";
three = "python3${three'}";
};
};
};
});
extension = makeExtensible newLib;
in with lib; extension.extend (final: prev: extension.foldToSet (attrValues prev))
Which is called from lib.nix using package.nix:
nixpkgs: nixpkgs.lib.extend (final: prev: { j = import ./lib.nix { lib = final; }; })
Which is finally defined in this flake:
{
inputs = {
nixpkgs.url = github:NixOS/nixpkgs/nixos-22.05;
flake-utils.url = github:numtide/flake-utils;
};
outputs = inputs@{ self, nixpkgs, flake-utils, ... }: with builtins; with flake-utils.lib; let
lib = import ./package.nix nixpkgs;
overlays = with lib; rec {
overlays = j.foldToSet' [
{
lib = import ./overlay.nix nixpkgs;
default = overlays.lib;
"${trace (trace j j.attrs) j.attrs.versions.python.two}" = genAttrs (j.imports.list { dir = ./callPackages/python2; })
(file: final: prev: j.update.python.callPython.two final prev file);
}
];
};
make = system: with lib; rec {
legacyPackages = import nixpkgs { inherit system; overlays = attrValues overlays.overlays; };
packages = flattenTree (genAttrs (attrNames overlays) (pkg: legacyPackages.${pkg}));
package = packages.default;
defaultPackage = package;
};
in eachSystem allSystems make;
}
The problem is that in trying to access j.attrs, j.dirCon.attrs is being accessed instead:
trace: { __unfix__ = <LAMBDA>; attrs = <CODE>; configs = <CODE>; dirCon = { attrs = <CODE>; dirs = <CODE>; files = <CODE>; others = <CODE>; sym = <CODE>; unknown = <CODE>; }; dirs = <CODE>; extend = <CODE>; files = <CODE>; foldToSet = <LAMBDA>; foldToSet' = <LAMBDA>; list = <CODE>; list' = <CODE>; mif = { list = <CODE>; list' = <CODE>; null = <CODE>; num = <CODE>; set = <CODE>; str = <CODE>; }; null = <CODE>; num = <CODE>; others = <CODE>; platforms = <CODE>; set = <CODE>; str = <CODE>; sym = <CODE>; unknown = <CODE>; versions = <CODE>; }
trace: { dirs = <CODE>; files = <CODE>; others = <CODE>; sym = <CODE>; unknown = <CODE>; }
error: attribute 'versions' missing
at /nix/store/z8rv515r1b53i4kpjrhjlh3kr37xzkf2-source/flake.nix:13:48:
12| default = overlays.lib;
13| "${trace (trace j j.attrs) j.attrs.versions.python.two}" = genAttrs (j.imports.list { dir = ./callPackages/python2; })
| ^
14| (file: final: prev: j.update.python.callPython.two final prev file);
… while evaluating the attribute 'attrs.versions.python.two'
at /nix/store/dycwkjqxlc93s7ch3c932d0f9xvfch33-source/lib/attrsets.nix:466:7:
465| inherit name;
466| value = f name (catAttrs name sets);
| ^
467| }) names);
… while evaluating 'fold''
at /nix/store/dycwkjqxlc93s7ch3c932d0f9xvfch33-source/lib/lists.nix:56:15:
55| len = length list;
56| fold' = n:
| ^
57| if n == len
… from call site
at /nix/store/dycwkjqxlc93s7ch3c932d0f9xvfch33-source/lib/lists.nix:60:8:
59| else op (elemAt list n) (fold' (n + 1));
60| in fold' 0;
| ^
61|
… while evaluating 'foldr'
at /nix/store/dycwkjqxlc93s7ch3c932d0f9xvfch33-source/lib/lists.nix:53:20:
52| */
53| foldr = op: nul: list:
| ^
54| let
… from call site
at /nix/store/z8rv515r1b53i4kpjrhjlh3kr37xzkf2-source/lib.nix:4:28:
3| foldToSet = list: foldr (new: old: recursiveUpdate new old) {} (filter isAttrs list);
4| foldToSet' = list: foldr (new: old: new // old) {} (filter isAttrs list);
| ^
5| mif = {
… while evaluating 'foldToSet''
at /nix/store/z8rv515r1b53i4kpjrhjlh3kr37xzkf2-source/lib.nix:4:22:
3| foldToSet = list: foldr (new: old: recursiveUpdate new old) {} (filter isAttrs list);
4| foldToSet' = list: foldr (new: old: new // old) {} (filter isAttrs list);
| ^
5| mif = {
… from call site
at /nix/store/z8rv515r1b53i4kpjrhjlh3kr37xzkf2-source/flake.nix:9:24:
8| overlays = with lib; rec {
9| overlays = j.foldToSet' [
| ^
10| {
… while evaluating the attribute 'overlays'
at /nix/store/z8rv515r1b53i4kpjrhjlh3kr37xzkf2-source/flake.nix:9:13:
8| overlays = with lib; rec {
9| overlays = j.foldToSet' [
| ^
10| {
… while evaluating 'throwIfNot'
at /nix/store/dycwkjqxlc93s7ch3c932d0f9xvfch33-source/lib/trivial.nix:379:22:
378| */
379| throwIfNot = cond: msg: if cond then x: x else throw msg;
| ^
380|
… from call site
at /nix/store/dycwkjqxlc93s7ch3c932d0f9xvfch33-source/pkgs/top-level/default.nix:55:5:
54| checked =
55| throwIfNot (lib.isList overlays) "The overlays argument to nixpkgs must be a list."
| ^
56| lib.foldr (x: throwIfNot (lib.isFunction x) "All overlays passed to nixpkgs must be functions.") (r: r) overlays
… while evaluating anonymous lambda
at /nix/store/dycwkjqxlc93s7ch3c932d0f9xvfch33-source/pkgs/top-level/default.nix:19:1:
18|
19| { # The system packages will be built on. See the manual for the
| ^
20| # subtle division of labor between these two `*System`s and the three
… from call site
at /nix/store/dycwkjqxlc93s7ch3c932d0f9xvfch33-source/pkgs/top-level/impure.nix:82:1:
81|
82| import ./. (builtins.removeAttrs args [ "system" ] // {
| ^
83| inherit config overlays localSystem;
… while evaluating anonymous lambda
at /nix/store/dycwkjqxlc93s7ch3c932d0f9xvfch33-source/pkgs/top-level/impure.nix:14:1:
13|
14| { # We put legacy `system` into `localSystem`, if `localSystem` was not passed.
| ^
15| # If neither is passed, assume we are building packages on the current
… from call site
at /nix/store/z8rv515r1b53i4kpjrhjlh3kr37xzkf2-source/flake.nix:19:30:
18| make = system: with lib; rec {
19| legacyPackages = import nixpkgs { inherit system; overlays = attrValues overlays.overlays; };
| ^
20| packages = flattenTree (genAttrs (attrNames overlays) (pkg: legacyPackages.${pkg}));
… while evaluating anonymous lambda
at /nix/store/z8rv515r1b53i4kpjrhjlh3kr37xzkf2-source/flake.nix:20:68:
19| legacyPackages = import nixpkgs { inherit system; overlays = attrValues overlays.overlays; };
20| packages = flattenTree (genAttrs (attrNames overlays) (pkg: legacyPackages.${pkg}));
| ^
21| package = packages.default;
… from call site
at /nix/store/dycwkjqxlc93s7ch3c932d0f9xvfch33-source/lib/attrsets.nix:414:43:
413| genAttrs = names: f:
414| listToAttrs (map (n: nameValuePair n (f n)) names);
| ^
415|
… while evaluating the attribute 'overlays'
at /nix/store/dycwkjqxlc93s7ch3c932d0f9xvfch33-source/lib/attrsets.nix:312:41:
311| */
312| nameValuePair = name: value: { inherit name value; };
| ^
313|
… while evaluating 'op'
at /nix/store/hiy5ba45bw71ls4qrgsfz2rxx7h83x52-source/flattenTree.nix:3:19:
2| let
3| op = sum: path: val:
| ^
4| let
… from call site
at /nix/store/hiy5ba45bw71ls4qrgsfz2rxx7h83x52-source/flattenTree.nix:30:18:
29| builtins.foldl'
30| (sum: key: op sum (path ++ [ key ]) val.${key})
| ^
31| sum
… while evaluating anonymous lambda
at /nix/store/hiy5ba45bw71ls4qrgsfz2rxx7h83x52-source/flattenTree.nix:30:13:
29| builtins.foldl'
30| (sum: key: op sum (path ++ [ key ]) val.${key})
| ^
31| sum
… from call site
at /nix/store/hiy5ba45bw71ls4qrgsfz2rxx7h83x52-source/flattenTree.nix:29:5:
28| recurse = sum: path: val:
29| builtins.foldl'
| ^
30| (sum: key: op sum (path ++ [ key ]) val.${key})
… while evaluating 'recurse'
at /nix/store/hiy5ba45bw71ls4qrgsfz2rxx7h83x52-source/flattenTree.nix:28:24:
27|
28| recurse = sum: path: val:
| ^
29| builtins.foldl'
… from call site
at /nix/store/hiy5ba45bw71ls4qrgsfz2rxx7h83x52-source/flattenTree.nix:35:1:
34| in
35| recurse { } [ ] tree
| ^
… while evaluating anonymous lambda
at /nix/store/hiy5ba45bw71ls4qrgsfz2rxx7h83x52-source/flattenTree.nix:1:1:
1| tree:
| ^
2| let
… from call site
at /nix/store/hiy5ba45bw71ls4qrgsfz2rxx7h83x52-source/default.nix:172:23:
171| # }
172| flattenTree = tree: import ./flattenTree.nix tree;
| ^
173|
… while evaluating 'flattenTree'
at /nix/store/hiy5ba45bw71ls4qrgsfz2rxx7h83x52-source/default.nix:172:17:
171| # }
172| flattenTree = tree: import ./flattenTree.nix tree;
| ^
173|
… from call site
at /nix/store/z8rv515r1b53i4kpjrhjlh3kr37xzkf2-source/flake.nix:20:24:
19| legacyPackages = import nixpkgs { inherit system; overlays = attrValues overlays.overlays; };
20| packages = flattenTree (genAttrs (attrNames overlays) (pkg: legacyPackages.${pkg}));
| ^
21| package = packages.default;
… while evaluating the attribute 'packages'
at /nix/store/z8rv515r1b53i4kpjrhjlh3kr37xzkf2-source/flake.nix:20:13:
19| legacyPackages = import nixpkgs { inherit system; overlays = attrValues overlays.overlays; };
20| packages = flattenTree (genAttrs (attrNames overlays) (pkg: legacyPackages.${pkg}));
| ^
21| package = packages.default;
I have no idea what’s going on, and any help would be greatly appreciated!