compile into source code instead of node modules

[samuelstroschein]

• compile only JSDoc. get rid of typescript declaration stuff
• remove namespacing stuff
• init command must set "checkJs" "allowJs" to true
• split messages to signal messages/de imports to everyone

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Discussed in #1579

^{Originally posted by samuelstroschein November 2, 2023}
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Problem

The majority/all JS tooling default assumes that code in node_modules is static. Paraglide's compilation into node_modules breaks that assumption, leading to bugs that are fixed with workarounds.

Proposal

Don't compile into node_modules. Instead, compile into the source code itself with a git ignore.

-import { setLanguageTag, languageTag } from '@inlang/paraglide-js/sveltekit-example';
+import { setLanguageTag, languageTag } from '../../paraglide-js/runtime';
-import * as m from "@inlang/paraglide-js/sveltekit-example/messages"
+import * as m from "../../paraglide-js/messages"

Pros

• no need for "namespacing" as two codebases won't compile into the same directory, see paraglide-js preview feedback thread #1464 (comment)
• less bugs because the majority of tooling (typescript, bundlers, etc.) expects node_modules to be static, see Add note about Vite' Pre-bundling to build-a-global-svelte-app blog post #1533, [bug] sveltekit vercel adapter does not bundle paraglide, leading to unresolvable imports #1485 (comment), paraglide vite plugin  #1518 (comment)
• no need for declaration files as typescript can resolve JSDoc itself (simpler compiler!)

Neutral

• users are responsible for importing messages themselves (no more explaining of 'namespaces' @inlang/paraglide-js/{name}/messages; imports will differ per user (but it's just normal JS after all!))

Cons

• "pollution" of source code (gitignore to the rescue)

CleanShot.2023-11-02.at.16.37.28.mp4

[DanikVitek]

This way the dependency itself can be moved to the devDependencies section

[samuelstroschein]

This way the dependency itself can be moved to the devDependencies section

correct!