Incremental migration from cross-spawn

1. Change the importCopy Anchor Link

- import spawn from 'cross-spawn';
+ import spawn from 'bellpull/cross-spawn';

bellpull/cross-spawn passes cross-spawn 7.0.6's own suite, 68 of 68, and require() works too. The dependency tree goes from four packages to none. npx burgee migrate --dry-run lists the imports it would rewrite.

2. Move a call site to run()Copy Anchor Link

The drop-in returns a ChildProcess, and the caller collects output and waits for close. run() does that and returns the result:

import spawn from 'bellpull/cross-spawn';
import { run } from 'bellpull';

import { install, runtimeWith } from './tools.mjs';

install();
const runtime = runtimeWith('bin');

// Before: a ChildProcess, and the bookkeeping around it.
const child = spawn('greet', ['1'], { env: runtime.env });
let out = '';
child.stdout.on('data', (chunk) => (out += chunk));
const code = await new Promise((resolve) => child.on('close', resolve));
console.log('spawn:', code, out.trim());

// After: one value.
const result = await run('greet', ['1'], { runtime });
console.log('run:  ', result.code, result.stdout.trim(), result.ok);

spawn: 1 hello from bin
run:   1 hello from bin false

What changes at a call site that moves:

• A deadline appears. run() kills a child after 30 s unless you pass timeout; a long-running child — a dev server, a watcher — needs timeout: 0.
• A missing command rejects with NotFoundError, where spawn emitted an error event.
• Output is collected. For a child whose output should go straight to the terminal, pass stdio: 'inherit'; the result then has empty stdout and stderr.
• The environment is explicit. The runtime's env and cwd are the child's, unless the call passes its own.

From whichCopy Anchor Link

- import which from 'which';
+ import which from 'bellpull/node-which';

graded 5 of 5 by node-which's suite. Moving on to bellpull/which changes the answer's shape ({ path, from, ext } instead of a string) and stops searching empty and relative PATH entries — see Finding the executable.