Nix build Rust Web application

Builds a Web application using Rust as a backend.

Can work with any frontend as long as this frontend uses yarn and uses one of these frameworks:

• React
• VueJS

The only condition is that the backend binary must accept the path of the frontend assets to serve as the last argument.

Any other argument can be passed using the args attribute.

Usage

Imagine you have a project like so:

+-backend/        # Rust backend
| | Cargo.nix
| | ...
|
+-frontend/       # React frontend
| | yarn.lock
| | ...
|
| flake.nix

Then you can do something like:

inputs.build_rust_app.url = "github:litchipi/nixbuild_rust_webapp";

And in the outputs:

defaultPackage = build_rust_app.lib.${system}.startRustyWebApp rec {
  name = "example";

  # Optionnal scripts you can set to be executed before / after
  scripts = {
    init = "# First thing";
    pre_exec = "# Prepare service execution";
    post_exec = "# Clean after service execution";
    exit = "# Last thing to do";
  };

  args = [
    "--port 8083"
  ];

  backend = {
    cargo2nix_file = ./backend/Cargo.nix;
    rustChannel = "stable";
    rustVersion = "1.61.0";
  };

  frontend = {
    src = ./frontend_react;
    type = "react";
  };
};

Adding a database

The library can automate the creation of a postgresql database by doing:

defaultPackage = build_rust_app.lib.${system}.startRustyWebApp rec {
  name = "example";

  # Optionnal scripts you can set to be executed before / after
  scripts = {
    init = "# First thing";
    pre_db = "# Prepare the creation of the database";
    pre_exec = "# Prepare service execution";
    post_exec = "# Clean after service execution";
    post_db = "# Clean after the database service is stopped";
    exit = "# Last thing to do";
  };

  args = [
    "--port 8083"
    "-h localhost"
    "-n ${database.dbname}"
    "-d ${builtins.toString database.port}"
    "-u ${database.user}"
  ];

  database = rec {
    enable = true;

    local = true;
    host = "localhost";
    port = 5435;

    dbname = "${name}db";
    user = "psql_${name}";
    dir = "/var/${name}/db";
    logfile = "${dir}/logs";
  };

  backend = {
    cargo2nix_file = ./backend/Cargo.nix;
    rustChannel = "stable";
    rustVersion = "1.61.0";
  };

  frontend = {
    src = ./frontend_react;
    type = "react";
  };
};