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explicitly link to external ena docs #88813

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Sep 12, 2021
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8 changes: 8 additions & 0 deletions src/bootstrap/doc.rs
Original file line number Diff line number Diff line change
@@ -590,10 +590,18 @@ impl Step for Rustc {
cargo.rustdocflag("-Znormalize-docs");
cargo.rustdocflag("--show-type-layout");
compile::rustc_cargo(builder, &mut cargo, target);
cargo.arg("-Zunstable-options");
cargo.arg("-Zskip-rustdoc-fingerprint");

// Only include compiler crates, no dependencies of those, such as `libc`.
// Do link to dependencies on `docs.rs` however using `rustdoc-map`.
cargo.arg("--no-deps");
cargo.arg("-Zrustdoc-map");

// FIXME: `-Zrustdoc-map` does not yet correctly work for transitive dependencies,
// once this is no longer an issue the special case for `ena` can be removed.
cargo.rustdocflag("--extern-html-root-url");
cargo.rustdocflag("ena=https://docs.rs/ena/latest/");

// Find dependencies for top level crates.
let mut compiler_crates = HashSet::new();