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lib/meta.nix: introduce getExe'

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getExe' can be used to get a binary other than the mainProgram from a
derivation.

Signed-off-by: Sefa Eyeoglu <contact@scrumplex.net>
This commit is contained in:
Sefa Eyeoglu 2023-08-13 12:27:41 +02:00
parent 9591244e00
commit 3036465760
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GPG key ID: E13DFD4B47127951
2 changed files with 21 additions and 6 deletions
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2
lib/default.nix
View file

@ -116,7 +116,7 @@ let
inherit (self.derivations) lazyDerivation;
inherit (self.meta) addMetaAttrs dontDistribute setName updateName
appendToName mapDerivationAttrset setPrio lowPrio lowPrioSet hiPrio
hiPrioSet getLicenseFromSpdxId getExe;
hiPrioSet getLicenseFromSpdxId getExe getExe';
inherit (self.filesystem) pathType pathIsDirectory pathIsRegularFile;
inherit (self.sources) cleanSourceFilter
cleanSource sourceByRegex sourceFilesBySuffices

25
lib/meta.nix
View file

@ -144,9 +144,24 @@ rec {
=> "/nix/store/am9ml4f4ywvivxnkiaqwr0hyxka1xjsf-mustache-go-1.3.0/bin/mustache"
*/
getExe = x:
"${lib.getBin x}/bin/${x.meta.mainProgram or (
# This could be turned into an error when 23.05 is at end of life
lib.warn "getExe: Package ${lib.strings.escapeNixIdentifier x.meta.name or x.pname or x.name} does not have the meta.mainProgram attribute. We'll assume that the main program has the same name for now, but this behavior is deprecated, because it leads to surprising errors when the assumption does not hold. If the package has a main program, please set `meta.mainProgram` in its definition to make this warning go away. Otherwise, if the package does not have a main program, or if you don't control its definition, specify the full path to the program, such as \"\${lib.getBin foo}/bin/bar\"."
lib.getName x
)}";
let
y = x.meta.mainProgram or (
# This could be turned into an error when 23.05 is at end of life
lib.warn "getExe: Package ${lib.strings.escapeNixIdentifier x.meta.name or x.pname or x.name} does not have the meta.mainProgram attribute. We'll assume that the main program has the same name for now, but this behavior is deprecated, because it leads to surprising errors when the assumption does not hold. If the package has a main program, please set `meta.mainProgram` in its definition to make this warning go away. Otherwise, if the package does not have a main program, or if you don't control its definition, specify the full path to the program, such as \"\${lib.getBin foo}/bin/bar\"."
lib.getName
x
);
in
getExe' x y;
/* Get the path of a program of a derivation.
Type: getExe' :: derivation -> string -> string
Example:
getExe' pkgs.hello "hello"
=> "/nix/store/g124820p9hlv4lj8qplzxw1c44dxaw1k-hello-2.12/bin/hello"
getExe' pkgs.imagemagick "convert"
=> "/nix/store/5rs48jamq7k6sal98ymj9l4k2bnwq515-imagemagick-7.1.1-15/bin/convert"
*/
getExe' = x: y: "${lib.getBin x}/bin/${y}";
}