komp_ac/packaging/musl/default.nix

{ pkgs, source, version }:

let
  muslPkgs = pkgs.pkgsMusl;
  postgresqlVersion = "17.10";
  postgresqlArchiveVersion = "17.10.0";
  archiveName = "postgresql-${postgresqlArchiveVersion}-x86_64-unknown-linux-musl.tar.gz";

  bootstrapInput = pname: inputs:
    pkgs.lib.findFirst
      (input: (input.pname or "") == pname)
      (throw "Nixpkgs does not expose ${pname} for the musl toolchain")
      inputs;
  bootstrapRustPlatform = muslPkgs.makeRustPlatform {
    rustc = bootstrapInput
      "rustc-bootstrap"
      muslPkgs.rustc-unwrapped.nativeBuildInputs;
    cargo = bootstrapInput
      "cargo-bootstrap"
      muslPkgs.cargo.nativeBuildInputs;
  };

  staticOpenSSL = muslPkgs.openssl.overrideAttrs (old: {
    configureFlags =
      builtins.filter (flag: flag != "shared") old.configureFlags
      ++ [ "no-shared" ];
    doCheck = false;
  });

  postgresqlSource = pkgs.fetchurl {
    url = "https://ftp.postgresql.org/pub/source/v${postgresqlVersion}/postgresql-${postgresqlVersion}.tar.bz2";
    hash = "sha256-B4oDUW3NvbcF/sr0Feo9E6lWxYnkbwn+1ooG+wBZjJA=";
  };

  postgresqlArchive = muslPkgs.stdenv.mkDerivation {
    pname = "komp-ac-postgresql-musl";
    version = postgresqlArchiveVersion;
    src = postgresqlSource;

    nativeBuildInputs = [
      pkgs.bison
      pkgs.file
      pkgs.flex
      pkgs.gnutar
      pkgs.gzip
      pkgs.perl
    ];

    configurePhase = ''
      runHook preConfigure
      ./configure \
        --prefix="$out/postgresql" \
        --disable-nls \
        --without-gssapi \
        --without-icu \
        --without-ldap \
        --without-libxml \
        --without-libxslt \
        --without-llvm \
        --without-lz4 \
        --without-openssl \
        --without-pam \
        --without-readline \
        --without-systemd \
        --without-zlib \
        --without-zstd
      runHook postConfigure
    '';

    buildPhase = ''
      runHook preBuild
      make -j"$NIX_BUILD_CORES"
      make -C contrib/btree_gist -j"$NIX_BUILD_CORES"
      runHook postBuild
    '';

    installPhase = ''
      runHook preInstall
      make install-strip
      make -C contrib/btree_gist install

      "$CC" -static -Os -s -Wall -Wextra -Werror \
        -o postgresql-launcher \
        ${./postgresql-launcher.c}

      mkdir -p "$out/postgresql/libexec"
      for tool in "$out"/postgresql/bin/*; do
        toolName="''${tool##*/}"
        mv "$tool" "$out/postgresql/libexec/$toolName"
        cp postgresql-launcher "$out/postgresql/bin/$toolName"
      done
      cp ${muslPkgs.musl}/lib/ld-musl-x86_64.so.1 \
        "$out/postgresql/lib/ld-musl-x86_64.so.1"

      file "$out/postgresql/bin/postgres" | grep -q 'statically linked'
      "$out/postgresql/bin/postgres" --version

      mkdir postgresql-data postgresql-socket
      "$out/postgresql/bin/initdb" \
        --auth=trust \
        --no-locale \
        -D "$PWD/postgresql-data"
      "$out/postgresql/bin/pg_ctl" \
        -D "$PWD/postgresql-data" \
        -l "$PWD/postgresql.log" \
        -o "-k $PWD/postgresql-socket -p 55432" \
        -w start
      "$out/postgresql/bin/psql" \
        -h "$PWD/postgresql-socket" \
        -p 55432 \
        -d postgres \
        -c "CREATE EXTENSION btree_gist; SET TIME ZONE 'UTC';"
      "$out/postgresql/bin/pg_ctl" \
        -D "$PWD/postgresql-data" \
        -m fast \
        -w stop

      tar -C "$out" -czf "$out/${archiveName}" postgresql
      runHook postInstall
    '';

    dontPatchELF = true;
    dontStrip = true;
  };
in
bootstrapRustPlatform.buildRustPackage {
  pname = "komp-ac-server-portable";
  inherit version source;
  src = source;

  cargoLock.lockFile = ../../Cargo.lock;
  cargoBuildFlags = [
    "--package"
    "server"
    "--no-default-features"
    "--features"
    "portable-postgres"
  ];
  auditable = false;
  doCheck = false;

  nativeBuildInputs = [
    pkgs.binutils
    pkgs.cmake
    pkgs.file
    pkgs.pkg-config
    pkgs.protobuf
  ];
  buildInputs = [ staticOpenSSL ];

  OPENSSL_STATIC = "1";
  OPENSSL_LIB_DIR = "${staticOpenSSL.out}/lib";
  OPENSSL_INCLUDE_DIR = "${staticOpenSSL.dev}/include";
  POSTGRESQL_VERSION = "=${postgresqlArchiveVersion}";
  KOMP_AC_POSTGRESQL_ARCHIVE = "${postgresqlArchive}/${archiveName}";
  KOMP_AC_POSTGRESQL_VERSION = postgresqlArchiveVersion;
  SQLX_OFFLINE = "true";
  RUSTFLAGS = "-Ctarget-feature=+crt-static";

  preBuild = ''
    cp -r ${source}/.sqlx .sqlx
  '';

  postInstall = ''
    test -x "$out/bin/server"
    ! readelf -l "$out/bin/server" | grep -q 'Requesting program interpreter'
    ! readelf -d "$out/bin/server" | grep -q '(NEEDED)'
  '';

  meta = {
    description = "Portable komp_ac server with embedded musl PostgreSQL";
    license = pkgs.lib.licenses.agpl3Plus;
    platforms = [ "x86_64-linux" ];
    mainProgram = "server";
  };
}