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fetchurl - add wrapper with output derivation overridable #158018

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fetchurl - add wrapper with output derivation overridable #158018

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14 changes: 14 additions & 0 deletions pkgs/top-level/all-packages.nix
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Original file line number Diff line number Diff line change
Expand Up @@ -643,6 +643,20 @@ with pkgs;
});
};

/* If you want convenient syntax to override the derivation produced by `fetchurl`, for instance
to override just the hash of a `src` whose `url` is computed, you can replace the `fetchurl`
dependency of the outer package derivation with this one.

Example:
tk869 = (pkgs.tk-8_6.override {
fetchurl = fetchurlOverridableOutput;
tcl = tcl869; # Something overriding `tcl-8_6 to an older version
}).overrideAttrs (self: rec {
src = self.src.override { sha256 = "1d7bfkxpacy33w5nahf73lkwxqpff44w1jplg7i2gmwgiaawvjwg"; };
});
*/
fetchurlOverridableOutput = args: (makeOverridable fetchurl args);

fetchRepoProject = callPackage ../build-support/fetchrepoproject { };

fetchipfs = import ../build-support/fetchipfs {
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