make: break out doc build from 'ci' target

Break out the doc build from the base 'ci' target because it requires
tweaking the compiler flags which blows away the cache for subsequent,
normal builds.

Author: bmwill

Makefile

@@ -7,16 +7,21 @@ check-fmt:
 clippy:
 	cargo clippy --all-features --all-targets
 
-doc:
-	RUSTDOCFLAGS="--cfg=doc_cfg -Zunstable-options --generate-link-to-definition" RUSTC_BOOTSTRAP=1 cargo doc --all-features --no-deps
-
 test:
 	cargo test --all-features
 
 wasm:
 	CC=clang wasm-pack test --node --all-features
 
-ci: check-features check-fmt clippy doc test wasm
+doc:
+	RUSTDOCFLAGS="--cfg=doc_cfg -Zunstable-options --generate-link-to-definition" RUSTC_BOOTSTRAP=1 cargo doc --all-features --no-deps
+
+doc-open:
+	RUSTDOCFLAGS="--cfg=doc_cfg -Zunstable-options --generate-link-to-definition" RUSTC_BOOTSTRAP=1 cargo doc --all-features --no-deps --open
+
+ci: check-features check-fmt clippy test wasm
+
+ci-full: ci doc
 
 clean:
 	cargo clean