bd9246b009
Meta attributes types are now enforce as of commit
90b9719f4f,
so ensure meta.priority is always set to an integer.
This fixes evaluation of `linuxPackages_latest.virtualbox`
(the impetus for this commit)
and other packages that use lowPrio or hiPrio.
66 lines
1.7 KiB
Nix
66 lines
1.7 KiB
Nix
/* Some functions for manipulating meta attributes, as well as the
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name attribute. */
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let lib = import ./default.nix;
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in
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rec {
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/* Add to or override the meta attributes of the given
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derivation.
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Example:
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addMetaAttrs {description = "Bla blah";} somePkg
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*/
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addMetaAttrs = newAttrs: drv:
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drv // { meta = (drv.meta or {}) // newAttrs; };
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/* Change the symbolic name of a package for presentation purposes
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(i.e., so that nix-env users can tell them apart).
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*/
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setName = name: drv: drv // {inherit name;};
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/* Like `setName', but takes the previous name as an argument.
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Example:
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updateName (oldName: oldName + "-experimental") somePkg
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*/
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updateName = updater: drv: drv // {name = updater (drv.name);};
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/* Append a suffix to the name of a package (before the version
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part). */
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appendToName = suffix: updateName (name:
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let x = builtins.parseDrvName name; in "${x.name}-${suffix}-${x.version}");
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/* Apply a function to each derivation and only to derivations in an attrset
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*/
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mapDerivationAttrset = f: set: lib.mapAttrs (name: pkg: if lib.isDerivation pkg then (f pkg) else pkg) set;
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/* Decrease the nix-env priority of the package, i.e., other
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versions/variants of the package will be preferred.
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*/
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lowPrio = drv: addMetaAttrs { priority = 10; } drv;
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/* Apply lowPrio to an attrset with derivations
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*/
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lowPrioSet = set: mapDerivationAttrset lowPrio set;
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/* Increase the nix-env priority of the package, i.e., this
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version/variant of the package will be preferred.
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*/
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hiPrio = drv: addMetaAttrs { priority = -10; } drv;
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/* Apply hiPrio to an attrset with derivations
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*/
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hiPrioSet = set: mapDerivationAttrset hiPrio set;
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}
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