This plugin breaks vitest coverage report

[Sec-ant]

When using this plugin and adding // #v-ifdef DEV and // #v-endif comments in my code, vitest marks all code as 100% covered (istanbul).

If I remove the directives, the coverage works again:

Similar issues can be found at:

1. Vite plugin breaks vitest coverage report unplugin-vue-components#333
2. this plugin destroy sourcemap. unplugin-vue-components#219 (maybe related, this is referred to in the previous link)

This should be easily reproducible.

Here is a minimal reproduction: https://stackblitz.com/edit/vitest-dev-vitest-4tlh7n?file=src%2Findex.ts

Is there a workaround to solve this problem?

[Sec-ant]

As I only do testing in dev mode and use this conditional compile plugin in build mode, I find a workaround to force this plugin to only work at build process:

In my vite.config.ts, I extended the plugin return object with apply: "build" and it solves my problem

plugins: [{ ...ConditionalCompile(), apply: "build" }]