Generate all thumbnails with Kirby CLI

thumbs.php

<?php

declare(strict_types = 1);

set_time_limit(0);

use Kirby\CLI\CLI;
use Kirby\Toolkit\Dir;
use Kirby\Toolkit\Str;
use Kirby\Cms\Media;

return [
	'description' => 'Generates all thumbnails',
	'command' => static function (CLI $cli): void {
		$kirby = $cli->kirby();

		$cli->bold("Generating thumbnail jobs for all pages…");

		foreach ($kirby->site()->index() as $page) {
			$page->render();
			$cli->out($page->url());
		}

		$cli->bold("Generating thumbnails…");

		$generated = [];

		foreach (Dir::index($kirby->root('media'), true) as $path) {

			if (!Str::endsWith($path, '.json')) continue;

			$parts = explode('/', $path);
			$count = count($parts);
			$type = $parts[0];
			$hash = $parts[$count - 3];
			$path = implode('/', array_splice($parts, 1, $count - 4));
			$filename = str_replace('.json', '', array_pop($parts));

			$generated[] = $path . '/' . $filename;

			if ($type === 'assets') {
				Media::thumb($path, $hash, $filename);
				continue;
			}

			$model = match($type) {
				'site' => $kirby->site(),
				'users' => $kirby->user($path),
				default => $kirby->page($path)
			};

			Media::link($model, $hash, $filename);

			$cli->success($path . '/' . $filename . ' ✅');
		}

		if (count($generated)) {
			$cli->success()->bold(count($generated) . ' thumbnails have been created' . ' ✅');
		}
		else {
			$cli->success("Nothing to generate");
		}
	}
];

I ran the command and the process always exited at one page when rendering and didn't continue to the thumbnail generation. I commented out $page->render(); to find the culprit and it turns out that a page with a redirect (in my case it was projects/ redirecting to the homepage) breaks this process. Commenting out the redirect while generating thumbnails solved it.

Yeah, unfortunately that's an issue with how Kirby handles redirects. I also flagged this in the Janitor plugin.