movefasta/nixpkgs
1
0
Fork 0
mirror of https://github.com/NixOS/nixpkgs.git synced 2025-06-12 04:35:41 +03:00
Code Issues Projects Releases Packages Wiki Activity

modules: Extract mkAliasDefinition from the rename.nix NixOS module.

Browse source
This commit is contained in:
Nicolas B. Pierron 2014-12-22 22:38:38 +01:00
parent 4e558732e7
commit d7f29acd48
2 changed files with 27 additions and 2 deletions
Download patch file Download diff file Expand all files Collapse all files

25
lib/modules.nix
View file

@ -356,6 +356,31 @@ rec {
mkBefore = mkOrder 500;
mkAfter = mkOrder 1500;
# Convenient property used to transfer all definitions and their
# properties from one option to another. This property is useful for
# renaming options, and also for including properties from another module
# system, including sub-modules.
#
# { config, options, ... }:
#
# {
# # 'bar' might not always be defined in the current module-set.
# config.foo.enable = mkAliasDefinitions (options.bar.enable or {});
#
# # 'barbaz' has to be defined in the current module-set.
# config.foobar.paths = mkAliasDefinitions options.barbaz.paths;
# }
#
# Note, this is different than taking the value of the option and using it
# as a definition, as the new definition will not keep the mkOverride /
# mkDefault properties of the previous option.
#
mkAliasDefinitions = mkAliasAndWrapDefinitions id;
mkAliasAndWrapDefinitions = wrap: option:
mkMerge
(optional (isOption option && option.isDefined)
(wrap (mkMerge option.definitions)));
/* Compatibility. */
fixMergeModules = modules: args: evalModules { inherit modules args; check = false; };