docs: replace doc_auto_cfg config with doc_cfg (#1142)

* docs: replace doc_auto_cfg config with doc_cfg

* ci: enable docsrs only on rustdoc

* ci: Use cargo doc to detect missing documentation on building document

* ci: Remove graceful document to check

* Revert "ci: Remove graceful document to check"

This reverts commit 86f3ea0.

Author: tottoto

.github/workflows/ci.yml

@@ -86,13 +86,7 @@ jobs:
       - name: Install Rust
         uses: dtolnay/rust-toolchain@nightly
 
-      # check for missing docs
-      - name: cargo check
-        run: cargo check --all-features
-        env:
-          RUSTFLAGS: "--cfg docsrs"
-
       - name: cargo doc
-        run: cargo rustdoc --all-features -- -D 'rustdoc::broken_intra_doc_links'
+        run: cargo doc --all-features --no-deps
         env:
-          RUSTFLAGS: "--cfg docsrs"
+          RUSTDOCFLAGS: "--cfg docsrs -D rustdoc::broken_intra_doc_links"

src/lib.rs

@@ -2,7 +2,7 @@
 #![deny(missing_debug_implementations)]
 #![deny(rust_2018_idioms)]
 #![cfg_attr(test, deny(warnings))]
-#![cfg_attr(docsrs, feature(doc_auto_cfg))]
+#![cfg_attr(docsrs, feature(doc_cfg))]
 
 //! # warp
 //!