nixpkgs/pkgs/development/beam-modules/fetch-rebar-deps.nix

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{ lib, stdenv, rebar3 }:
{ name, version, sha256, src
, meta ? {}
}:
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with lib;
stdenv.mkDerivation ({
name = "rebar-deps-${name}-${version}";
phases = [ "downloadPhase" "installPhase" ];
downloadPhase = ''
cp ${src} .
HOME='.' DEBUG=1 ${rebar3}/bin/rebar3 get-deps
'';
installPhase = ''
mkdir -p "$out/_checkouts"
for i in ./_build/default/lib/* ; do
echo "$i"
cp -R "$i" "$out/_checkouts"
done
'';
outputHashAlgo = "sha256";
outputHashMode = "recursive";
outputHash = sha256;
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impureEnvVars = lib.fetchers.proxyImpureEnvVars;
inherit meta;
})