Tags: wca/cargo

Auto merge of rust-lang#1641 - alexcrichton:update-less, r=brson

Updating a path source can be a possibly expensive operation (lots of
directories that need to be traversed), and currently the root path source is
updated three times:

* Once when the root package is initially loaded.
* Again when the first resolution pass happens over a graph.
* Finally a third when the second resolution pass happens over the graph.

This commit pushes through the original `Source` trait object into the
`PackageRegistry` and removes the implicit call to `add_sources`, pushing that
call up to the stack a bit.

auto merge of rust-lang#988 : Gekkio/cargo/zsh-run-normal-args, r=ale…

…xcrichton

Running a Rust program with some arguments such as files is a common use
case. The ZSH completion did not declare support for extra arguments to
"cargo run", so file completion was impossible. In practice pressing TAB
after writing "cargo run -- " gave no completion at all.

After this patch, cargo run can do "normal completion",
which in practice does file/directory completion. This works nicely
with "cargo run -- ".