iconify/packages/utils/src/loader/utils.ts

import { installPackage } from '@antfu/install-pkg';
import { sleep } from '@antfu/utils';
import { cyan, yellow } from 'kolorist';

const warned = new Set<string>();

export function warnOnce(msg: string): void {
	if (!warned.has(msg)) {
		warned.add(msg);
		console.warn(yellow(`[@iconify-loader] ${msg}`));
	}
}

let pending: Promise<void> | undefined;
const tasks: Record<string, Promise<void> | undefined> = {};

export async function tryInstallPkg(name: string): Promise<void | undefined> {
	if (pending) {
		await pending;
	}

	if (!tasks[name]) {
		// eslint-disable-next-line no-console
		console.log(cyan(`Installing ${name}...`));
		tasks[name] = pending = installPackage(name, {
			dev: true,
			preferOffline: true,
		})
			.then(() => sleep(300))
			// eslint-disable-next-line
			.catch((e: any) => {
				warnOnce(`Failed to install ${name}`);
				console.error(e);
			})
			.finally(() => {
				pending = undefined;
			});
	}

	// eslint-disable-next-line @typescript-eslint/no-non-null-assertion
	return tasks[name]!;
}