RunTime-Now 2.1.0

Run other programs, your package.json scripts and a dev loop that restarts on save.

• node:child_process: spawn, exec, execFile and spawnSync, execSync, execFileSync (also as child_process, and through require()). Children run with pipes or the terminal (stdio: "pipe" | "inherit" | "ignore"), cwd, env, shell, input, timeout, killSignal, maxBuffer and signal (AbortSignal). ChildProcess has stdin / stdout / stderr streams (data / end, setEncoding, pipe(), for await) and spawn / exit / close / error events; util.promisify(exec) resolves to { stdout, stderr }. Errors match Node's (spawn foo ENOENT, Command failed: … with status / code / signal). Exit is tracked with a pidfd, so a running child keeps the event loop alive and costs nothing while it waits. tests/cases/child-process.mjs prints exactly what Node 22 prints.
• rtn run <script>: runs a "scripts" entry of the nearest package.json, like npm run / bun run: pre<name> / post<name> hooks, extra arguments passed on (quoted), node_modules/.bin and rtn itself on PATH, the npm_package_* / npm_lifecycle_event variables, and the script's exit code. rtn run alone lists the scripts. rtn run <file> still runs a file.
• rtn --watch <file>: restarts the program when a .js / .ts / .json / .env file in the project changes (inotify; node_modules and hidden directories skipped, new directories picked up). Works with any command: rtn --watch test, rtn --watch run dev. Ctrl+C or SIGTERM stops the program too.
• .env files: .env.local, .env.$NODE_ENV and .env are loaded into process.env before your code runs (and passed on to child processes and scripts). Quotes, multi-line values, comments, export, and ${VAR} / ${VAR:-default} expansion. Variables already in the environment win. --env-file <file> (repeatable) loads other files instead, --no-env-file turns it off.
• rtn init asks TypeScript or JavaScript: an arrow-key menu (↑/↓ or j/k, 1/2, Enter; Esc or Ctrl+C cancels) picks the template. The JavaScript project has index.js, greet.js with JSDoc types, greet.test.js and a jsconfig.json with checkJs. --ts / --js (or -y for TypeScript) skip the question, and without a terminal — scripts, CI — TypeScript is chosen as before.

Install

curl -fsSL https://byteforgestudiolab.github.io/RunTime-Now/install | bash

Already installed? Run rtn upgrade.