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Show correct position info for errors in submodules

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E.g.

  The unique option `fileSystems./.device' is defined multiple times, in `/etc/nixos/configuration.nix' and `/etc/nixos/foo.nix'.

This requires passing file/value tuples to the merge functions.
This commit is contained in:
Eelco Dolstra 2013-10-30 14:21:41 +01:00
parent 4680af6a93
commit 800f9c2037
6 changed files with 88 additions and 93 deletions
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31
lib/options.nix
View file

@ -30,36 +30,39 @@ rec {
type = lib.types.bool;
};
mergeDefaultOption = args: list:
mergeDefaultOption = loc: defs:
let list = getValues defs; in
if length list == 1 then head list
else if all builtins.isFunction list then x: mergeDefaultOption args (map (f: f x) list)
else if all builtins.isFunction list then x: mergeDefaultOption loc (map (f: f x) list)
else if all isList list then concatLists list
else if all isAttrs list then fold lib.mergeAttrs {} list
else if all builtins.isBool list then fold lib.or false list
else if all builtins.isString list then lib.concatStrings list
else if all builtins.isInt list && all (x: x == head list) list then head list
else throw "Cannot merge definitions of `${showOption args.prefix}' given in ${showFiles args.files}.";
else throw "Cannot merge definitions of `${showOption loc}' given in ${showFiles (getFiles defs)}.";
/* Obsolete, will remove soon. Specify an option type or apply
function instead. */
mergeTypedOption = typeName: predicate: merge: args: list:
if all predicate list then merge list
else throw "Expect a ${typeName}.";
mergeTypedOption = typeName: predicate: merge: loc: list:
let list' = map (x: x.value) list; in
if all predicate list then merge list'
else throw "Expected a ${typeName}.";
mergeEnableOption = mergeTypedOption "boolean"
(x: true == x || false == x) (fold lib.or false);
mergeListOption = mergeTypedOption "list" isList concatLists;
mergeStringOption = mergeTypedOption "string"
(x: if builtins ? isString then builtins.isString x else x + "")
lib.concatStrings;
mergeStringOption = mergeTypedOption "string" builtins.isString lib.concatStrings;
mergeOneOption = args: list:
if list == [] then abort "This case should never happen."
else if length list != 1 then
throw "The unique option `${showOption args.prefix}' is defined multiple times, in ${showFiles args.files}."
else head list;
mergeOneOption = loc: defs:
if defs == [] then abort "This case should never happen."
else if length defs != 1 then
throw "The unique option `${showOption loc}' is defined multiple times, in ${showFiles (getFiles defs)}."
else (head defs).value;
getValues = map (x: x.value);
getFiles = map (x: x.file);
# Generate documentation template from the list of option declaration like