Have a proper 404 page for rust-lang.org and static.rust-lang.org

[huonw]

We've been rather free with breaking old links and people are greeted with a generic github page or a raw XML page, which is very off-putting. (The XML page especially so, since static.rust-lang.org is where we put the docs.)

A nice page with a search bar and helpful links would be awesome.

[chris-morgan]

For static.rust-lang.org, it should detect whether it is inside /doc/REVISION/CRATE/ and if it is, do these sorts of things:

• Dynamically load /doc/REVISION/CRATE/{jquery.js, search-index.js, main.js} and be prepared to conduct a search for the appropriate member.
• For a subpath of foo/bar/ or foo/bar/index.html, say "it looks like you're looking for foo::bar, which doesn't exist." and show search results for bar below.
• For a subpath of foo/bar.html, if foo::bar is a module, redirect automatically to foo/bar/index.html.
• For a subpath of foo/struct.Bar.html (and the other such types), say "it looks like you're looking for foo::Bar, which doesn't exist." (highlighting the path components appropriately as module and struct) and show search results for Bar below.

These are all entirely feasible with the one static document, using document.location.pathname.

[huonw]

Of course, that can be done incrementally. Even a really boring HTML page with a few static links would be orders of magnitude better than what we have now.

[adrientetar]

We could also redirect static.rust-lang.org to the main page or the doc index.

[huonw]

(We now have cross-crate search, fwiw.)

[pnkfelix]

nominating. I think we need to do this properly before releasing 1.0.

[pnkfelix]

Assigning P-high, 1.0.

[alexcrichton]

Closing, this is configured now:

http://static.rust-lang.org/foobar