detect-node

index.js

#!/usr/bin/env node
import os from "node:os";
import path from "node:path";
import { $, execa } from "execa";
import { locatePath } from "locate-path";
import defaultShell from "default-shell";

async function getShellProfile() {
  const { homedir } = os.userInfo();

  if (defaultShell.endsWith("zsh")) {
    return path.join(homedir, ".zshrc");
  }

  const shellProfile = await locatePath([
    path.join(homedir, ".bashrc"),
    path.join(homedir, ".bash_profile"),
    path.join(homedir, ".profile"),
  ]);

  return shellProfile ?? path.join(homedir, ".zshrc");
}

async function getNodePathBare(cwd) {
  const $$ = $({
    cwd,
  });

  const { stdout } = await $$`which node`;

  return stdout;
}

async function getNodePathWithoutProfile(cwd) {
  const $$ = $({
    shell: defaultShell,
    cwd,
  });

  const { stdout } = await $$`which node`;

  return stdout;
}

async function getNodePath(cwd) {
  const shellProfile = await getShellProfile();

  const $$ = $({
    shell: defaultShell,
    cwd,
  });

  const { stdout } = await $$`source ${shellProfile} && which node`;

  return stdout;
}

async function getSystemNodeVersion(cwd) {
  const node = await getNodePath(cwd);
  const { stdout, failed } = await execa(node, ["--version"], {
    timeout: 3_000,
    reject: false,
  });

  return failed ? undefined : stdout.replace(/^v/, "");
}

console.log("Default shell =", defaultShell);
console.log("This shell =", process.env["SHELL"]);
console.log("Shell profile =", await getShellProfile());
console.log("Node path bare =", await getNodePathBare(process.cwd()));
console.log(
  "Node path without profile =",
  await getNodePathWithoutProfile(process.cwd())
);
console.log("Node path =", await getNodePath(process.cwd()));
console.log("Node version =", await getSystemNodeVersion(process.cwd()));

package.json

{
  "name": "detect-node",
  "version": "1.0.0",
  "description": "",
  "type": "module",
  "bin": "./index.js",
  "dependencies": {
    "default-shell": "2.2.0",
    "execa": "7.1.1",
    "locate-path": "7.2.0"
  }
}