diff options
Diffstat (limited to 'nixpkgs/lib')
-rw-r--r-- | nixpkgs/lib/default.nix | 2 | ||||
-rw-r--r-- | nixpkgs/lib/modules.nix | 2 | ||||
-rw-r--r-- | nixpkgs/lib/types.nix | 12 |
3 files changed, 14 insertions, 2 deletions
diff --git a/nixpkgs/lib/default.nix b/nixpkgs/lib/default.nix index ccfee2ebe303..8e29ef5c4201 100644 --- a/nixpkgs/lib/default.nix +++ b/nixpkgs/lib/default.nix @@ -116,7 +116,7 @@ let pushDownProperties dischargeProperties filterOverrides sortProperties fixupOptionType mkIf mkAssert mkMerge mkOverride mkOptionDefault mkDefault mkForce mkVMOverride - mkOrder mkBefore mkAfter mkAliasDefinitions + mkFixStrictness mkOrder mkBefore mkAfter mkAliasDefinitions mkAliasAndWrapDefinitions fixMergeModules mkRemovedOptionModule mkRenamedOptionModule mkMergedOptionModule mkChangedOptionModule mkAliasOptionModule doRename; diff --git a/nixpkgs/lib/modules.nix b/nixpkgs/lib/modules.nix index 58c6cda58e49..ab2bc4f7f8e2 100644 --- a/nixpkgs/lib/modules.nix +++ b/nixpkgs/lib/modules.nix @@ -713,6 +713,8 @@ rec { mkForce = mkOverride 50; mkVMOverride = mkOverride 10; # used by ‘nixos-rebuild build-vm’ + mkFixStrictness = lib.warn "lib.mkFixStrictness has no effect and will be removed. It returns its argument unmodified, so you can just remove any calls." id; + mkOrder = priority: content: { _type = "order"; inherit priority content; diff --git a/nixpkgs/lib/types.nix b/nixpkgs/lib/types.nix index f47a1f92de72..c35f055e17f5 100644 --- a/nixpkgs/lib/types.nix +++ b/nixpkgs/lib/types.nix @@ -581,7 +581,17 @@ rec { in mkOptionType rec { name = "enum"; - description = "one of ${concatMapStringsSep ", " show values}"; + description = + # Length 0 or 1 enums may occur in a design pattern with type merging + # where an "interface" module declares an empty enum and other modules + # provide implementations, each extending the enum with their own + # identifier. + if values == [] then + "impossible (empty enum)" + else if builtins.length values == 1 then + "value ${show (builtins.head values)} (singular enum)" + else + "one of ${concatMapStringsSep ", " show values}"; check = flip elem values; merge = mergeEqualOption; functor = (defaultFunctor name) // { payload = values; binOp = a: b: unique (a ++ b); }; |