Happy Tracks

Make efficient CLI runners without all the bloat and dependency hell.

Basically, this will group the output of multiple processes by name so you can better read it in your terminal. Output can be difficult to read when you have multiple concurrent scripts running and this aims to solve that problem.

Installation

npm i happytracks

Use

There's only one method: track(name, childProcess)

happy.track("compile-js", spawn("./build-js", []));
happy.track("compile-styles", spawn("./build-css", []));

For convenience, you may also run them synchronously. This would be useful for a script which must run before others (e.g. processing a graphql json file).

happy.track("server", spawn("npm", ["run-script", "server"]));

await happy.track("compile-js", spawn("yarn", ["run", "relay"])); // <= wait until done

happy.track("My Great Process", spawn("npm", ["run-script", "greatness"]));

Real life example

const { spawn } = require("child_process");
const happy = require("happytracks");

happy.track(
  "server",
  spawn(
    "nodemon",
    [
      "-V",
      "-x",
      "node --harmony --use_strict",
      "--watch",
      `${ROOT_DIR}/src/server/`,
      "--ignore",
      "schema.json",
      "--ignore",
      "public/",
      `${ROOT_DIR}/src/server/bin/www`
    ],
    {
      env: Object.assign(
        {}, 
        {
          DEBUG: "app:*",
          NODE_PATH: `${ROOT_DIR}/src/server`,
          NODE_CONFIG_DIR: `${ROOT_DIR}/src/server/config`,
          PORT: 3000
        },
        process.env
      )
    }
  )
);

happy.track(
  "build-css",
  spawn(
    "nodemon",
    [
      path.join(__dirname, "/build-css"),
      "-x",
      "node --harmony",
      "-e",
      "styl",
      "--watch",
      `${ROOT_DIR}/src/client/stylus/`
    ],
    {
      env: Object.assign(
        {},
        {
          CLIENT_PATH: `${ROOT_DIR}/src/client`,
          SERVER_PATH: `${ROOT_DIR}/src/server`
        },
        process.env
      )
    }
  )
);

happy.track(
  "build-js",
  spawn(path.join(__dirname, "/build-js"), [], {
    env: Object.assign(
      {},
      {
        CLIENT_PATH: `${ROOT_DIR}/src/client`,
        SERVER_PATH: `${ROOT_DIR}/src/server`
      },
      process.env
    )
  })
);