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