nordic-dev.net/nixpkgs
nordic-dev.net/nixpkgs
2
0
Fork 0
mirror of https://github.com/NixOS/nixpkgs.git synced 2024-11-27 09:23:01 +00:00
Code Issues Packages Projects Releases Wiki Activity

Allow to set priority which are below the default priority level.

Browse Source 
This help to define default values which can be override without any extra syntax.

svn path=/nixpkgs/trunk/; revision=16304
This commit is contained in:
Nicolas Pierron 2009-07-10 09:44:09 +00:00
parent c30a867383
commit 5cd8eefb26
1 changed files with 20 additions and 8 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

28
pkgs/lib/options.nix
View File

@ -670,6 +670,10 @@ rec {
inherit content;
};
# Sugar to override the default value of the option by making a new
# default value based on the configuration.
mkDefaultValue = content: mkOverride 1000 {} content;
# Make the template traversal in function of the property traversal. If
# the template define a non-empty attribute set, then the property is
# copied only on all mentionned attributes inside the template.
@ -701,7 +705,7 @@ rec {
foldProperty
(foldFilter isOverride
(p@{property, content, ...}:
if lessThan content.priority property.priority then
if content ? priority && lessThan content.priority property.priority then
content
else
content // {
@ -713,16 +717,24 @@ rec {
value = p // { content = content.value; };
}
)
) (value: { priority = defaultPrio; inherit value; });
) (value: { inherit value; });
prioValList = map getPrioVal valList;
addDefaultPrio = x:
if x ? priority then x
else x // { priority = defaultPrio; };
higherPrio = fold (x: y:
if lessThan x.priority y then
x.priority
prioValList = map (x: addDefaultPrio (getPrioVal x)) valList;
higherPrio =
if prioValList == [] then
defaultPrio
else
y
) defaultPrio prioValList;
fold (x: min:
if lessThan x.priority min then
x.priority
else
min
) (head prioValList).priority (tail prioValList);
in
map (x:
if x.priority == higherPrio then