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lib.types.attrsWith: add placeholder parameter

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Johannes Kirschbauer 2024-12-09 13:30:36 +01:00
parent fd6bc1b590
commit d504a1e680
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7 changed files with 163 additions and 17 deletions
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19
lib/options.nix
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@ -420,20 +420,17 @@ rec {
Placeholders will not be quoted as they are not actual values:
(showOption ["foo" "*" "bar"]) == "foo.*.bar"
(showOption ["foo" "<name>" "bar"]) == "foo.<name>.bar"
(showOption ["foo" "<myPlaceholder>" "bar"]) == "foo.<myPlaceholder>.bar"
*/
showOption = parts: let
# If the part is a named placeholder of the form "<...>" don't escape it.
# It may cause misleading escaping if somebody uses literally "<...>" in their option names.
# This is the trade-off to allow for placeholders in option names.
isNamedPlaceholder = builtins.match "\<(.*)\>";
escapeOptionPart = part:
let
# We assume that these are "special values" and not real configuration data.
# If it is real configuration data, it is rendered incorrectly.
specialIdentifiers = [
"<name>" # attrsOf (submodule {})
"*" # listOf (submodule {})
"<function body>" # functionTo
];
in if builtins.elem part specialIdentifiers
then part
else lib.strings.escapeNixIdentifier part;
if part == "*" || isNamedPlaceholder part != null
then part
else lib.strings.escapeNixIdentifier part;
in (concatStringsSep ".") (map escapeOptionPart parts);
showFiles = files: concatStringsSep " and " (map (f: "`${f}'") files);