nixpkgs/pkgs/build-support/fetchurl/boot.nix
2022-08-24 09:55:45 +02:00

26 lines
624 B
Nix

let mirrors = import ./mirrors.nix; in
{ system }:
{ url ? builtins.head urls
, urls ? []
, sha256 ? ""
, hash ? ""
, name ? baseNameOf (toString url)
}:
# assert exactly one hash is set
assert hash != "" || sha256 != "";
assert hash != "" -> sha256 == "";
import <nix/fetchurl.nix> {
inherit system hash sha256 name;
url =
# Handle mirror:// URIs. Since <nix/fetchurl.nix> currently
# supports only one URI, use the first listed mirror.
let m = builtins.match "mirror://([a-z]+)/(.*)" url; in
if m == null then url
else builtins.head (mirrors.${builtins.elemAt m 0}) + (builtins.elemAt m 1);
}