mirror of
https://github.com/ilyakooo0/nixpkgs.git
synced 2024-12-29 14:57:28 +03:00
96 lines
3.5 KiB
Nix
96 lines
3.5 KiB
Nix
let lib = import ./default.nix;
|
|
inherit (builtins) getAttr attrNames isFunction;
|
|
|
|
in
|
|
|
|
rec {
|
|
|
|
|
|
/* `overrideDerivation drv f' takes a derivation (i.e., the result
|
|
of a call to the builtin function `derivation') and returns a new
|
|
derivation in which the attributes of the original are overriden
|
|
according to the function `f'. The function `f' is called with
|
|
the original derivation attributes.
|
|
|
|
`overrideDerivation' allows certain "ad-hoc" customisation
|
|
scenarios (e.g. in ~/.nixpkgs/config.nix). For instance, if you
|
|
want to "patch" the derivation returned by a package function in
|
|
Nixpkgs to build another version than what the function itself
|
|
provides, you can do something like this:
|
|
|
|
mySed = overrideDerivation pkgs.gnused (oldAttrs: {
|
|
name = "sed-4.2.2-pre";
|
|
src = fetchurl {
|
|
url = ftp://alpha.gnu.org/gnu/sed/sed-4.2.2-pre.tar.bz2;
|
|
sha256 = "11nq06d131y4wmf3drm0yk502d2xc6n5qy82cg88rb9nqd2lj41k";
|
|
};
|
|
patches = [];
|
|
});
|
|
|
|
For another application, see build-support/vm, where this
|
|
function is used to build arbitrary derivations inside a QEMU
|
|
virtual machine. */
|
|
|
|
overrideDerivation = drv: f:
|
|
let
|
|
# Filter out special attributes.
|
|
drop = ["meta" "passthru" "outPath" "drvPath" "hostDrv" "buildDrv" "type" "override" "deepOverride" "origArgs"]
|
|
# also drop functions such as .merge .override etc
|
|
++ lib.filter (n: isFunction (getAttr n drv)) (attrNames drv);
|
|
attrs = removeAttrs drv drop;
|
|
newDrv = derivation (attrs // (f drv));
|
|
in newDrv //
|
|
{ meta = if drv ? meta then drv.meta else {};
|
|
passthru = if drv ? passthru then drv.passthru else {};
|
|
};
|
|
|
|
|
|
# usage: (you can use override multiple times)
|
|
# let d = makeOverridable stdenv.mkDerivation { name = ..; buildInputs; }
|
|
# noBuildInputs = d.override { buildInputs = []; }
|
|
# additionalBuildInputs = d.override ( args : args // { buildInputs = args.buildInputs ++ [ additional ]; } )
|
|
makeOverridable = f: origArgs:
|
|
let
|
|
ff = f origArgs;
|
|
in
|
|
if builtins.isAttrs ff then (ff //
|
|
{ override = newArgs:
|
|
makeOverridable f (origArgs // (if builtins.isFunction newArgs then newArgs origArgs else newArgs));
|
|
deepOverride = newArgs:
|
|
makeOverridable f (lib.overrideExisting (lib.mapAttrs (deepOverrider newArgs) origArgs) newArgs);
|
|
})
|
|
else ff;
|
|
|
|
deepOverrider = newArgs: name: x: if builtins.isAttrs x then (
|
|
if x ? deepOverride then (x.deepOverride newArgs) else
|
|
if x ? override then (x.override newArgs) else
|
|
x) else x;
|
|
|
|
|
|
/* Call the package function in the file `fn' with the required
|
|
arguments automatically. The function is called with the
|
|
arguments `args', but any missing arguments are obtained from
|
|
`autoArgs'. This function is intended to be partially
|
|
parameterised, e.g.,
|
|
|
|
callPackage = callPackageWith pkgs;
|
|
pkgs = {
|
|
libfoo = callPackage ./foo.nix { };
|
|
libbar = callPackage ./bar.nix { };
|
|
};
|
|
|
|
If the `libbar' function expects an argument named `libfoo', it is
|
|
automatically passed as an argument. Overrides or missing
|
|
arguments can be supplied in `args', e.g.
|
|
|
|
libbar = callPackage ./bar.nix {
|
|
libfoo = null;
|
|
enableX11 = true;
|
|
};
|
|
*/
|
|
callPackageWith = autoArgs: fn: args:
|
|
let f = import fn; in
|
|
makeOverridable f ((builtins.intersectAttrs (builtins.functionArgs f) autoArgs) // args);
|
|
|
|
}
|