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lib: implement setPrio

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For when `hiPrio` and `lowPrio` are not enough.
This commit is contained in:
Jan Malakhovski 2018-11-18 08:26:13 +00:00
parent 3ae0407d3c
commit 1b3629ef34
2 changed files with 7 additions and 6 deletions
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2
lib/default.nix
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@ -94,7 +94,7 @@ let
callPackageWith callPackagesWith extendDerivation hydraJob callPackageWith callPackagesWith extendDerivation hydraJob
makeScope; makeScope;
inherit (meta) addMetaAttrs dontDistribute setName updateName inherit (meta) addMetaAttrs dontDistribute setName updateName
appendToName mapDerivationAttrset lowPrio lowPrioSet hiPrio appendToName mapDerivationAttrset setPrio lowPrio lowPrioSet hiPrio
hiPrioSet; hiPrioSet;
inherit (sources) pathType pathIsDirectory cleanSourceFilter inherit (sources) pathType pathIsDirectory cleanSourceFilter
cleanSource sourceByRegex sourceFilesBySuffices cleanSource sourceByRegex sourceFilesBySuffices

11
lib/meta.nix
View File

@ -41,16 +41,18 @@ rec {
let x = builtins.parseDrvName name; in "${x.name}-${suffix}-${x.version}"); let x = builtins.parseDrvName name; in "${x.name}-${suffix}-${x.version}");
/* Apply a function to each derivation and only to derivations in an attrset /* Apply a function to each derivation and only to derivations in an attrset.
*/ */
mapDerivationAttrset = f: set: lib.mapAttrs (name: pkg: if lib.isDerivation pkg then (f pkg) else pkg) set; mapDerivationAttrset = f: set: lib.mapAttrs (name: pkg: if lib.isDerivation pkg then (f pkg) else pkg) set;
/* Set the nix-env priority of the package.
*/
setPrio = priority: addMetaAttrs { inherit priority; };
/* Decrease the nix-env priority of the package, i.e., other /* Decrease the nix-env priority of the package, i.e., other
versions/variants of the package will be preferred. versions/variants of the package will be preferred.
*/ */
lowPrio = drv: addMetaAttrs { priority = 10; } drv; lowPrio = setPrio 10;
/* Apply lowPrio to an attrset with derivations /* Apply lowPrio to an attrset with derivations
*/ */
@ -60,8 +62,7 @@ rec {
/* Increase the nix-env priority of the package, i.e., this /* Increase the nix-env priority of the package, i.e., this
version/variant of the package will be preferred. version/variant of the package will be preferred.
*/ */
hiPrio = drv: addMetaAttrs { priority = -10; } drv; hiPrio = setPrio (-10);
/* Apply hiPrio to an attrset with derivations /* Apply hiPrio to an attrset with derivations
*/ */