R's adbcbigquery documents don't exist

[eitsupi]

What happened?

I don't know what is causing this, but the documentation like below does not seem to exist.
https://arrow.apache.org/adbc/current/r/adbcbigquery/index.html

Stack Trace

No response

How can we reproduce the bug?

No response

Environment/Setup

No response

[paleolimbot]

Thanks for noticing!

It does look like this is in theory set up:

arrow-adbc/ci/scripts/docs_build.sh

Lines 60 to 69 in 95f55c7

	for desc_file in $(find "${source_dir}/r" -name DESCRIPTION); do
	local pkg=$(dirname "$desc_file")
	local pkg_name=$(basename $pkg)
	# Only build R documentation for installed packages (e.g., so that
	# Python's documentation build can run without installing the R
	# packages). Packages are installed in ci/scripts/r_build.sh
	if Rscript -e "loadNamespace('$pkg_name')" ; then
	R -e "pkgdown::build_site_github_pages(pkg = '$pkg', dest_dir = '$source_dir/docs/build/html/r/$pkg_name')"
	fi
	done

arrow-adbc/ci/scripts/r_build.sh

Lines 67 to 69 in 95f55c7

	if [[ "${BUILD_DRIVER_BIGQUERY}" -gt 0 ]]; then
	install_pkg "${source_dir}" "${install_dir}" adbcbigquery
	fi

...but maybe because the bigquery build isn't on by default, it's not getting built:

arrow-adbc/ci/scripts/r_build.sh

Lines 21 to 27 in 95f55c7

	: ${BUILD_ALL:=1}
	: ${BUILD_DRIVER_FLIGHTSQL:=${BUILD_ALL}}
	: ${BUILD_DRIVER_MANAGER:=${BUILD_ALL}}
	: ${BUILD_DRIVER_POSTGRESQL:=${BUILD_ALL}}
	: ${BUILD_DRIVER_SQLITE:=${BUILD_ALL}}
	: ${BUILD_DRIVER_SNOWFLAKE:=${BUILD_ALL}}