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Document the html_root_url doc attribute value. #60278

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May 17, 2019
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Document the html_root_url doc attribute value. #60278

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15 changes: 15 additions & 0 deletions src/doc/rustdoc/src/the-doc-attribute.md
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Expand Up @@ -92,6 +92,21 @@ the tracking issue.
#![doc(issue_tracker_base_url = "https://github.com/rust-lang/rust/issues/")]
```

### `html_root_url`

The `#[doc(html_root_url = "…")]` attribute value indicates the URL for
generating links to external crates. When rustdoc needs to generate a link to
an item in an external crate, it will first check if the extern crate has been
documented locally on-disk, and if so link directly to it. Failing that, it
will use the URL given by the `--extern-html-root-url` command-line flag if
available. If that is not available, then it will use the `html_root_url`
value in the extern crate if it is available. If that is not available, then
the extern items will not be linked.

```rust,ignore
#![doc(html_root_url = "https://docs.rs/serde/1.0")]
```

### `html_no_source`

By default, `rustdoc` will include the source code of your program, with links
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