core/pkgs/build-support/node/fetch-yarn-deps/default.nix

{
  stdenv,
  lib,
  makeWrapper,
  coreutils,
  nix-prefetch-git,
  fetchurl,
  nodejs-slim,
  prefetch-yarn-deps,
  cacert,
  callPackage,
  nix,
}:

let
  yarnpkg-lockfile-tar = fetchurl {
    url = "https://registry.yarnpkg.com/@yarnpkg/lockfile/-/lockfile-1.1.0.tgz";
    hash = "sha512-GpSwvyXOcOOlV70vbnzjj4fW5xW/FdUF6nQEt1ENy7m4ZCczi1+/buVUPAqmGfqznsORNFzUMjctTIp8a9tuCQ==";
  };

  tests = callPackage ./tests { };

in
{
  prefetch-yarn-deps = stdenv.mkDerivation {
    name = "prefetch-yarn-deps";

    dontUnpack = true;
    dontBuild = true;

    nativeBuildInputs = [ makeWrapper ];
    buildInputs = [ nodejs-slim ];

    installPhase = ''
      runHook preInstall

      mkdir -p $out/bin $out/libexec

      tar --strip-components=1 -xf ${yarnpkg-lockfile-tar} package/index.js
      mv index.js $out/libexec/yarnpkg-lockfile.js
      cp ${./.}/common.js ${./.}/index.js $out/libexec/

      patchShebangs $out/libexec
      makeWrapper $out/libexec/index.js $out/bin/prefetch-yarn-deps \
        --prefix PATH : ${
          lib.makeBinPath [
            coreutils
            nix-prefetch-git
            nix
          ]
        }

      runHook postInstall
    '';

    passthru = {
      inherit tests;
    };
  };

  fixup-yarn-lock = stdenv.mkDerivation {
    name = "fixup-yarn-lock";

    dontUnpack = true;
    dontBuild = true;

    nativeBuildInputs = [ makeWrapper ];
    buildInputs = [ nodejs-slim ];

    installPhase = ''
      runHook preInstall

      mkdir -p $out/bin $out/libexec

      tar --strip-components=1 -xf ${yarnpkg-lockfile-tar} package/index.js
      mv index.js $out/libexec/yarnpkg-lockfile.js
      cp ${./.}/common.js ${./.}/fixup.js $out/libexec/

      patchShebangs $out/libexec
      makeWrapper $out/libexec/fixup.js $out/bin/fixup-yarn-lock

      runHook postInstall
    '';

    passthru = {
      inherit tests;
    };
  };

  fetchYarnDeps =
    let
      f =
        {
          name ? "offline",
          src ? null,
          hash ? "",
          sha256 ? "",
          ...
        }@args:
        let
          hash_ =
            if hash != "" then
              {
                outputHashAlgo = null;
                outputHash = hash;
              }
            else if sha256 != "" then
              {
                outputHashAlgo = "sha256";
                outputHash = sha256;
              }
            else
              {
                outputHashAlgo = "sha256";
                outputHash = lib.fakeSha256;
              };
        in
        stdenv.mkDerivation (
          {
            inherit name;

            dontUnpack = src == null;
            dontInstall = true;

            nativeBuildInputs = [
              prefetch-yarn-deps
              cacert
            ];
            GIT_SSL_CAINFO = "${cacert}/etc/ssl/certs/ca-bundle.crt";
            NODE_EXTRA_CA_CERTS = "${cacert}/etc/ssl/certs/ca-bundle.crt";

            buildPhase = ''
              runHook preBuild

              yarnLock=''${yarnLock:=$PWD/yarn.lock}
              mkdir -p $out
              (cd $out; prefetch-yarn-deps --verbose --builder $yarnLock)

              runHook postBuild
            '';

            outputHashMode = "recursive";
          }
          // hash_
          // (removeAttrs args [
            "src"
            "name"
            "hash"
            "sha256"
          ])
        );

    in
    lib.setFunctionArgs f (lib.functionArgs f) // { inherit tests; };
}