options: Learn how to merge identical integer values.
svn path=/nixpkgs/trunk/; revision=20581
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@ -195,6 +195,8 @@ rec {
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else if all isAttrs list then fold lib.mergeAttrs {} list
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else if all builtins.isBool list then fold lib.or false list
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else if all builtins.isString list then lib.concatStrings list
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else if all builtins.isInt list && all (x: x == head list) list
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then head list
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else throw "Cannot merge values.";
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mergeTypedOption = typeName: predicate: merge: list:
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