Vite doesn't detect changes in files in target/flow-frontend

Description of the bug

We have a maven multimodule project where js/ts files from different maven modules end up in target/flow-frontend directory. Once the server is started for the first time (in development mode), vite creates the node_modules/.vite folder and it works. However any time I make a change in other modules and the updated file gets to target/flow-frontend, vite doesn’t detect the change until I manually delete the node_modules/.vite directory and restart the server. We even have a custom file watcher implemented which copies the modified files from src/main/resources/META-INF/resources/frontend from other modules to target/flow-frontend even when the server is running - this caused webpack to reload the page and the changes were effective even without server restart. However this doesn’t work with vite, not even with server restart.

Versions:

- Vaadin / Flow version: 23.2.2
- Java version: 17
- OS version: Mac OS 12.6
- Browser version (if applicable): Chrome 105.0.5195.125
- Application Server (if applicable): Spring boot 2.7.3 with embedded tomcat
- IDE (if applicable): Intellij IDEA
- Development or production mode: development

[F0rce]

any updates ?

[ggecy]

Thanks for the information. @ggecy do you mind sharing some information about your file watcher solution?

I don’t see any button to attach the file here, so I tried to share it on goodle drive: https://drive.google.com/file/d/1P-1umxNEKjkMxp2iBP0IFJbWOTr6R-jt/view?usp=sharing

The file is experimental, not a clean code, but it works… Feel free to modify it for your needs. It will try to find all META-INF/resources/frontend, META-INF/frontend and META-INF/resources/themes folders in any target folder of your modules on classpath and copies them to target/flow-frontend folder in your bootstrap module whenever it detects a change with slight delay to avoid duplicate activations. Also you need to press compile button in Intellij Idea if you modify your js/ts/css files in mentioned folders so they get copied to target (it doesn’t watch the src folder). It doesn’t do anything by itself, you need to register it as listener when starting your spring boot application:

public static void main(String[] args) {
        SpringApplication application = new SpringApplication(YourApplication.class);
        application.addListeners(new WebpackFrontendResourceExtractor());
        application.run(args);
    }