How rust get rand crate in building?

[BaoshanPang]

In building rust, I see there are two version of rand have been downloaded into my CARGO_HOME directory, one is 0.6.1, one is 0.7.0. I aslo see the layout of the souce code is quite differnt than what we can see here.

So my quesiton is how/where rust fetch the rand crate source code? In other word, if I want to add something to rand and build it with rust, how should I setup my work environment so the rust could use my local rand copy?

Thanks,
Baoshan

[vks]

Cargo fetches your dependency depending on what is specified in Cargo.toml. You can specify a path dependency with Cargo to use a local copy of Rand. Does this work for you?

[dhardy]

Manually downloading crates.io archives is not as easy as might be desired, but is possible.

Alternatively you can clone this repository. The current master is not that different than 0.7.0; there are also git tags for each release.