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{
  description = "Run the PostgreSQL server off a temporary data directory";

  inputs = {
    nixpkgs.url = "github:NixOS/nixpkgs/nixpkgs-unstable";
    flake-parts.url = "github:hercules-ci/flake-parts";
  };

  outputs =
    inputs@{
      self,
      nixpkgs,
      flake-parts,
      ...
    }:
    flake-parts.lib.mkFlake { inherit inputs; } {
      systems = [
        "x86_64-linux"
        "aarch64-linux"
        "aarch64-darwin"
      ];

      perSystem =
        {
          self',
          pkgs,
          lib,
          ...
        }:
        let
          version = builtins.head (lib.splitString "\n" (builtins.readFile ./version));
          revision = lib.toString (self.shortRev or self.dirtyShortRev or "unknown");
        in
        {
          packages.default = self'.packages.temp-postgres;

          packages.temp-postgres = pkgs.stdenv.mkDerivation {
            name = "temp-postgres-${version}-${revision}";
            version = "${version}-${revision}";
            src = lib.cleanSource (
              builtins.path {
                path = ./.;
                name = "temp-postgres";
              }
            );
            nativeBuildInputs = [ pkgs.makeBinaryWrapper ];
            installPhase = ''
              mkdir -p $out/bin
              cp temp-postgres.sh $out/bin/temp-postgres
              mkdir -p $out/man/man1
              cp temp-postgres.1 $out/man/man1/temp-postgres.1
              wrapProgram $out/bin/temp-postgres --prefix PATH : ${lib.makeBinPath [ pkgs.postgresql ]}
            '';
          };

          formatter = pkgs.nixfmt-tree;

          devShells.default = pkgs.mkShell {
            nativeBuildInputs = with pkgs; [
              gnumake
              gzip
              mandoc
              postgresql
              shellcheck
            ];
            shellHook = ''
              export FLAKE=${self}
            '';
          };
        };
    };
}
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