git.iko.soy/haskell.nix
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haskell.nix/lib/fetch-external.nix
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1# Provides a function for fetching a GitHub repo from a JSON spec,
2# overridable with the given entry on the NIX_PATH.
4let
5 overrideWith = import ./override-with.nix;
6in
7 { name, specJSON, override }:
8 let
9 spec = builtins.fromJSON (builtins.readFile specJSON);
10 in
11 overrideWith override
12 (builtins.fetchTarball {
13 inherit name;
14 url = "${spec.url}/archive/${spec.rev}.tar.gz";
15 inherit (spec) sha256;
16 })