Svelte 5 migration: Comments for props

[sdarnell]

Describe the bug

When migrating with npx sv migrate svelte-5 using sv@0.5.7 comments for props are copied across to the type definition, but lose the comment status.

<script lang="ts">
	/** Minimum width of each element in the grid */
	export let size = '13rem';
	/** Gap between elements */
	export let gap = '1rem';

	let _class = '';
	// noinspection ReservedWordAsName
	export { _class as class };
</script>

Hi there

Gets migrated to:

<script lang="ts">
	
	

	interface Props {
		Minimum width of each element in the grid
		size?: string;
		Gap between elements
		gap?: string;
		class?: string;
	}

	let { size = '13rem', gap = '1rem', class: _class = '' }: Props = $props();
	// noinspection ReservedWordAsName
	
</script>

Hi there

I ran the sv migrate locally but also pasted the above into the Svelte 5 playground and pressed 'Migrate'.

The key issue is the comments 'Minimum width of each element in the grid' loses the /** */

Minor issues:

There's a few blank lines left behind.

The WebStorm/Rider noinspection comment is incorrectly placed, but that's a tricky one and I'm more than happy to live with that.

Reproduction

https://svelte-5-preview.vercel.app/#H4sIAAAAAAAAE2WQwUrEQAyGXyXMZaEsFPHW3RX25F704MWDIzK2aRuYyQyTdFctfXcZ14LgLfnD98Gf2fTkUUzzMht2AU1jjimZrdHPVBY5o1c0WyNxym1J9tJmSgre8XCwRsWaO8tW66qCB2IKU4ALdTpC7AFdOwJ6DMgKxKAjwpCpg6ouDH6kmBU8Kgh9IRxgc3ObMWx2q_HeJXhHvSDy6pH_8ODSD7uibLXEb613IuXyK6yBI7EkbJUiwxMK5jN2zzF3R3l0Af945xV3Atdh2Vne19f6pTKfqBTK5T0hdtQTdqbRPOHyunwD6XinBVkBAAA=

gets migrated to

https://svelte-5-preview.vercel.app/#H4sIAAAAAAAAE11QTUvDQBD9K8MiVKEQxFtsLT3pRREvHozImp0kA9nZZWfaoiH_XTZbD3oYZt6b7zeZjkYUU79Nhq1HU5t9jGZt9CtmIEccFc3aSDikNjMbaRNFhdFyv22MSmPuGm70bNwosWLqbIvwnEIUmJaUPhKTP3g4kdMBQgdo2wFwRI-sQAw6IPSJXCkX-sZdDaKJuL8t3L2N8Il6QuTfRimZ3sb_xe1oRf6SczlwRIUJ8gLYwur6JqFfraG3cYEFLd01fCw-8yuY6_NDW7iIObi8WqZWFXAgloitUmB4QcF0RPcaktvLk_VYtNlURbosFz9Q_jdlaX1w1BE6U2s64Pw-_wC2ja1TlQEAAA==

Logs

No response

System Info

System:
    OS: macOS 15.0.1
    CPU: (8) arm64 Apple M1 Pro
    Memory: 87.39 MB / 16.00 GB
    Shell: 5.9 - /bin/zsh
  Binaries:
    Node: 20.11.1 - ~/.nvm/versions/node/v20.11.1/bin/node
    npm: 10.9.0 - ~/.nvm/versions/node/v20.11.1/bin/npm
    pnpm: 9.12.1 - /opt/homebrew/bin/pnpm
  Browsers:
    Chrome: 129.0.6668.101
    Safari: 18.0.1

Severity

annoyance

PS Raised here (rather on sv repo) as migration tool says:

This migration is experimental — please report any bugs to https://github.com/sveltejs/svelte/issues