run cargo doc check on CI

.github/workflows/ci.yml

@@ -58,3 +58,20 @@ jobs:
       - run: cargo clippy --examples --tests --no-default-features --features tuirs-no-backend -- -D warnings
       - run: cargo clippy --examples --tests --no-default-features --features tuirs-no-backend,search -- -D warnings
       - run: cargo rustdoc --features=search,termwiz,termion -p tui-textarea -- -D warnings
+  cargo-doc:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - uses: dtolnay/rust-toolchain@nightly
+      - name: Run `cargo doc` with same configuration as docs.rs
+        run: |
+          set -e
+          md="$(cargo metadata --format-version=1 | jq '.packages[] | select(.name=="tui-textarea") | .metadata.docs.rs')"
+          export RUSTDOCFLAGS="$(echo "$md" | jq -r '.["rustdoc-args"] | join(" ")') -D warnings"
+          features="$(echo "$md" | jq -r '.features | join(",")')"
+          set -x
+          for target in $(echo "$md" | jq -r '.targets | join(" ")')
+          do
+            rustup target add "$target"
+            cargo doc -p tui-textarea "--features=$features" "--target=$target"
+          done