fix: package manager detection in non interactive environments

[manuel3108]

Closes #502
p.select( was actually throwing, which caused the formatting relevant source code to be skipped.

@hyunbinseo Could you please check if this works for you? pkg-pr-new url will be posted in a second.

[pkg-pr-new]

Open in Stackblitz

npm i https://pkg.pr.new/sveltejs/cli/sv@503

npm i https://pkg.pr.new/sveltejs/cli/svelte-migrate@503

commit: c5db2dc

[hyunbinseo]

It works! This is how I've tested it:

pnpm i https://pkg.pr.new/sveltejs/cli/sv@503 -D

// https://github.com/hyunbinseo/svelte-kit-templates/blob/c4dd93a7559e51f2e8196716f44e0b68e69afc98/index.test.js

import { execSync } from 'node:child_process';

execSync('pnpm sv create --template minimal --no-add-ons --types jsdoc javascript');
execSync('pnpm sv add --no-preconditions --cwd javascript eslint prettier');

execSync('pnpm sv create --template minimal --no-add-ons --types ts typescript');
execSync('pnpm sv add --no-preconditions --cwd typescript eslint prettier');

[manuel3108]

Great that this works! You could probably just have used pnpm https://pkg.pr.new/sveltejs/cli/sv@503 create, the pkg-pr-new comment is still buggy.

[manuel3108]

Will be further enhanced by #531