depot/pkgs/development/beam-modules/fetch-hex.nix
Luke Granger-Brown 57725ef3ec Squashed 'third_party/nixpkgs/' content from commit 76612b17c0ce
git-subtree-dir: third_party/nixpkgs
git-subtree-split: 76612b17c0ce71689921ca12d9ffdc9c23ce40b2
2024-11-10 23:59:47 +00:00

45 lines
1.1 KiB
Nix

{ lib, stdenv, fetchurl }:
{ pkg
, version
, sha256
, meta ? { }
}:
stdenv.mkDerivation ({
pname = pkg;
inherit version;
dontBuild = true;
dontConfigure = true;
dontFixup = true;
src = fetchurl {
url = "https://repo.hex.pm/tarballs/${pkg}-${version}.tar";
inherit sha256;
};
unpackCmd = ''
tar -xf $curSrc contents.tar.gz CHECKSUM metadata.config
mkdir contents
tar -C contents -xzf contents.tar.gz
mv metadata.config contents/hex_metadata.config
# To make the extracted hex tarballs appear legitimate to mix, we need to
# make sure they contain not just the contents of contents.tar.gz but also
# a .hex file with some lock metadata.
# We use an old version of .hex file per hex's mix_task_test.exs since it
# is just plain-text instead of an encoded format.
# See: https://github.com/hexpm/hex/blob/main/test/hex/mix_task_test.exs#L410
echo -n "${pkg},${version},$(cat CHECKSUM | tr '[:upper:]' '[:lower:]'),hexpm" > contents/.hex
'';
installPhase = ''
runHook preInstall
mkdir "$out"
cp -Hrt "$out" .
success=1
runHook postInstall
'';
inherit meta;
})