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Add mergeStringOption and factor mergeSomethingOption by introducing mergeTypedOption.

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svn path=/nixpkgs/trunk/; revision=13310
This commit is contained in:
Nicolas Pierron 2008-11-16 19:23:00 +00:00
parent b196bab378
commit 34f916700d
1 changed files with 12 additions and 7 deletions
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19
pkgs/lib/default.nix
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@ -391,14 +391,19 @@ rec {
else if all __isAttrs list then mergeAttrs list
else abort "${name}: Cannot merge values.";
mergeEnableOption = name: list:
if all (x: true == x || false == x) list
then fold logicalOR false list
else abort "${name}: Expect a boolean value.";
mergeTypedOption = typeName: predicate: merge: name: list:
if all predicate list then merge list
else abort "${name}: Expect a ${typeName}.";
mergeListOption = name: list:
if all __isList list then concatLists list
else abort "${name}: Expect a list.";
mergeEnableOption = mergeTypedOption "boolean"
(x: true == x || false == x) (fold logicalOR false);
mergeListOption = mergeTypedOption "list"
__isList concatLists;
mergeStringOption = mergeTypedOption "string"
(x: if builtins ? isString then builtins.isString x else x + "")
concatStrings;
# Merge sets of options and bindings.
# noOption: function to call if no option is declared.