abda866f17
This allows on-the-fly rewriting of URLs before they are passed from fetchurl (or fetchurlBoot) to curl. The intended use is to allow inserting company-internal mirrors, or working around company firewalls and similar network restrictions, without having to extensively patch across all of nixpkgs. Instead, users can pass a function in their nixpkgs that performs the necessary URL rewrites. Co-authored-by: Alexander Bantyev <balsoft@balsoft.ru>
46 lines
894 B
Nix
46 lines
894 B
Nix
let
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mirrors = import ./mirrors.nix;
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in
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{
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rewriteURL,
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system,
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}:
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{
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url ? builtins.head urls,
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urls ? [ ],
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sha256 ? "",
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hash ? "",
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name ? baseNameOf (toString url),
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}:
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# assert exactly one hash is set
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assert hash != "" || sha256 != "";
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assert hash != "" -> sha256 == "";
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import <nix/fetchurl.nix> {
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inherit
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system
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hash
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sha256
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name
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;
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url =
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# Handle mirror:// URIs. Since <nix/fetchurl.nix> currently
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# supports only one URI, use the first listed mirror.
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let
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url_ =
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let
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u = rewriteURL url;
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in
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if builtins.isString u then
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u
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else
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throw "rewriteURL deleted the only URL passed to fetchurlBoot (was ${url})";
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m = builtins.match "mirror://([a-z]+)/(.*)" url_;
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in
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if m == null then url_ else builtins.head (mirrors.${builtins.elemAt m 0}) + (builtins.elemAt m 1);
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}
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