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users/lib.nix: allow to pass the full user

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This commit is contained in:
zimbatm 2020-04-26 18:42:20 +02:00
parent bc38d42934
commit 202f7fe8f9
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1 changed files with 9 additions and 11 deletions

20
users/lib.nix
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@ -1,19 +1,17 @@
{ lib }:
let
chrs = lib.listToAttrs (lib.imap (i: v: { name = v; value = i + 96; }) lib.lowerChars);
ord = c: builtins.getAttr c chrs;
in
{
# Make a unique UID from a 4-char identifier
mkUid = id: let
# TODO: Assert length
chars = lib.stringToCharacters id;
n = builtins.map (c: lib.mod (ord c) 10) chars;
s = builtins.concatStringsSep "" (builtins.map (i: builtins.toString i) n);
in
assert lib.length chars == 4;
1000 + lib.toInt s;
mkUid = id:
let
chars = lib.stringToCharacters (builtins.substring 0 4 id);
n = builtins.map (c: lib.mod (ord c) 10) chars;
s = builtins.concatStringsSep "" (builtins.map (i: builtins.toString i) n);
in
assert builtins.stringLength id >= 4;
assert builtins.length chars == 4;
1000 + lib.toInt s;
}