Fix rust docs build (rapidsai#84)

The rust API docs aren't being generated on docs.rapids.ai/cuvs . While the `build.sh docs` script was including the rust api docs, the `ci/build_docs.sh` wasn't. Fix.

Authors:
  - Ben Frederickson (https://github.com/benfred)

Approvers:
  - Corey J. Nolet (https://github.com/cjnolet)
  - Jake Awe (https://github.com/AyodeAwe)

URL: rapidsai/cuvs#84

ci/build_docs.sh

@@ -40,10 +40,17 @@ pushd cpp/doxygen
 doxygen Doxyfile
 popd
 
+rapids-logger "Build Rust docs"
+pushd rust
+export LIBCLANG_PATH=$(dirname $(find /opt/conda -name libclang.so | head -n 1))
+cargo doc -p cuvs --no-deps
+popd
+
 rapids-logger "Build Python docs"
 pushd docs
 sphinx-build -b dirhtml source _html
 sphinx-build -b text source _text
+mv ../rust/target/doc ./_html/_static/rust
 mkdir -p "${RAPIDS_DOCS_DIR}/cuvs/"{html,txt}
 mv _html/* "${RAPIDS_DOCS_DIR}/cuvs/html"
 mv _text/* "${RAPIDS_DOCS_DIR}/cuvs/txt"

dependencies.yaml

@@ -47,6 +47,7 @@ files:
       - py_version
       - rust
       - build
+      - cuda
   rust:
     output: none
     includes: