Optionally download source code along with toolchain

[WizardUli]

Rust sources comes handy when you are using racer or when you are cross-compiling etc...
It would be nice to have a possibility to download/upgrade rust sources along with the toolchain.

[matklad]

Maybe it's a good idea even to download them by default. libstd should not be that big, and if you are using multirust then you are most likely a developer and need sources for completion anyway.

[steveklabnik]

if you are using multirust then you are most likely a developer and need sources for completion anyway.

Not all developers use completion.

[matklad]

Not all developers use completion.

Hm, I think that overwhelming majority uses at least hippie-expand or some alternative in their editor of choice.

Not all developers setup semantic completion, but I think it is because hippie-expand works out of the box, and almost anything else requires some awkward setup to actually be useful. So I think your argument works backwards: if we download sources by default, completion setup becomes easier and more developers use it :)

However I think that this may be not the best option here: see https://internals.rust-lang.org/t/what-do-you-think-about-publishing-libstd-on-crates-io/3227

[steveklabnik]

Hm, I think that overwhelming majority uses at least hippie-expand

I've never even heard of hippie-expand. 😄 I think it really depends on the circles you run in.

[matklad]

I've never even heard of hippie-expand.
or some alternative in their editor of choice.

In vim it is Ctrl-N and called keyword completion I think

[matklad]

@brson I'd like to try to implement this unless libstd and related crates are uploaded to crates.io in the nearest future :)

[toothbrush7777777]

@matklad Any updates?

[matklad]

@toothbrush7777777 no, unfortunately other things have happened :) At the same time the rust-lang/rfcs#1133 RFC looks like a better solution for the problem. The RFC, among other things, should allow cargo to download the source of stdlib.

[Diggsey]

Prerequisite: rust-lang-deprecated/rust-buildbot#102

[aka-demik]

rust-lang-deprecated/rust-buildbot#102 was merged.

[Diggsey]

@aka-demik Yep, the next nightly will be the first to contain source packages. Then we can test #659 against those source packages and hopefully get it merged.

I'm confident we'll be able to install source packages with the next release of rustup.