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kotlinlang

Is it possible to get sourcemaps to use absolute paths instead of relative paths?

When developing locally, we use `yarn link` a lot, and end up with mismatches between the generated sourcemap's relative path and where the code actually is. This can be annoying because it breaks in-browser debugging. Things would be easier for us if we could just use absolute paths instead.

I've tried setting
```        freeCompilerArgs += listOf(
            "-source-map-base-dirs", "/",
            "-source-map-prefix", "/"
        )```
but that doesn't seem to work.

*Update:*

When I drop the `"-source-map-prefix", "/"` , the `-source-map-base-dirs` seems to work: I get paths relative to my root!

But those are still relative paths: they're missing the `/` prefix

Using `KotlinJsOptions.sourceMapPrefix` instead of the freeCompilerArgs doesn't seem to work either.

If I set `sourceMapPrefix` to something like `"fooBar"` or `"fooBar/"``, it works just fine, even alongside source-map-prefix.

It's just `"/"` that's being ignored.

Filed: <https://youtrack.jetbrains.com/issue/KT-49634>