default-shell/index.js at main · sindresorhus/default-shell · GitHub

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import process from 'node:process';
import {userInfo} from 'node:os';

export const detectDefaultShell = () => {
	const {env} = process;

	if (process.platform === 'win32') {
		return env.COMSPEC || 'cmd.exe';
	}

	try {
		const {shell} = userInfo();
		if (shell) {
			return shell;
		}
	} catch {}

	if (process.platform === 'darwin') {
		return env.SHELL || '/bin/zsh';
	}

	return env.SHELL || '/bin/sh';
};

// Stores default shell when imported.
const defaultShell = detectDefaultShell();

export default defaultShell;