nixpkgs/pkgs/build-support/rust/fetchcrate.nix

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{ lib, fetchurl, unzip }:
{ crateName ? args.pname
, pname ? null
, version
, sha256
, ... } @ args:
assert pname == null || pname == crateName;
lib.overrideDerivation (fetchurl ({
name = "${crateName}-${version}.tar.gz";
url = "https://crates.io/api/v1/crates/${crateName}/${version}/download";
recursiveHash = true;
downloadToTemp = true;
postFetch =
''
export PATH=${unzip}/bin:$PATH
unpackDir="$TMPDIR/unpack"
mkdir "$unpackDir"
cd "$unpackDir"
renamed="$TMPDIR/${crateName}-${version}.tar.gz"
mv "$downloadedFile" "$renamed"
unpackFile "$renamed"
fn=$(cd "$unpackDir" && echo *)
if [ -f "$unpackDir/$fn" ]; then
mkdir $out
fi
mv "$unpackDir/$fn" "$out"
'';
} // removeAttrs args [ "crateName" "pname" "version" ]))
# Hackety-hack: we actually need unzip hooks, too
(x: {nativeBuildInputs = x.nativeBuildInputs++ [unzip];})