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Handle apply attribute for each option declared with MkOption.

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This is similar to the new-proposal in upstart-jobs except that the default value is also processed with this function. (the existing merge function acts only on extra values).

svn path=/nixpkgs/trunk/; revision=13308
This commit is contained in:
Nicolas Pierron 2008-11-16 19:22:47 +00:00
parent ed57af85a7
commit 08b583682a
1 changed files with 3 additions and 3 deletions
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6
pkgs/lib/default.nix
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@ -407,13 +407,13 @@ rec {
zip (attr: opts: zip (attr: opts:
let let
name = if path == "" then attr else path + "." + attr; name = if path == "" then attr else path + "." + attr;
defaultOpt = { merge = mergeDefaultOption; };
test = partition isOption opts; test = partition isOption opts;
opt = ({ merge = mergeDefaultOption; apply = id; } // head test.right);
in in
if test.right == [] then mergeOptionSets noOption name test.wrong if test.right == [] then mergeOptionSets noOption name test.wrong
else if tail test.right != [] then throw "Multiple options for '${name}'." else if tail test.right != [] then throw "Multiple options for '${name}'."
else if test.wrong == [] then (head test.right).default else if test.wrong == [] then opt.apply opt.default
else (defaultOpt // head test.right).merge name test.wrong else opt.apply (opt.merge name test.wrong)
) opts ) opts
else noOption path opts; else noOption path opts;