Fix website preview

[Bisaloo]

following upstream changes in r-lib/pkgdown#2650

Otherwise, we get the following error:

The change upstream is complex but the gist of what we're looking at here is that fs::path() was changed to fs::path_abs(). And fs::path_abs() doesn't work the same way as path() for file paths that already start with /.

fs::path("test", "/test.html")
#> test/test.html

fs::path_abs("/test.html", "test")
#> /test.html

fs::path_abs("test.html", "test")
#> /tmp/Rtmpyp0NA5/reprex-e4b47ac38bdd-hemp-urson/test/test.html

^{Created on 2024-12-02 with reprex v2.1.1}

@joelnitta reported a similar issue on slack. Joel, could you please try and see if this PR resolves your issue? 🙏

[froggleston]

Many thanks @Bisaloo ! Just to confirm this won't affect lessons building against an older pkgdown version but this sandpaper version?

[Bisaloo]

Thanks for the reminder @froggleston, I forgot to check that!

I can confirm the proposed change works fine with pkgdown 2.0.9, which predates r-lib/pkgdown#2650

[froggleston]

I'll wait for @joelnitta to also confirm and if this all is OK on his end, I'll merge this in.

[joelnitta]

@Bisaloo @froggleston I can confirm this works on my end!