Allow usage without rustup

[msrd0]

I'm using Atom with ide-rust plugin on ArchLinux with rust installed through the system package manager, pacman. Everytime I create or open a .rs-file in Atom I see a popup asking me to install the nightly toolchain with rustup. However, I am not going to use rustup because pacman can do just fine and I dislike having a thousand different package managers installed on my system. Especially since rust already brings its own package manager, cargo.

However, some features such as code completion are not available. I guess this is due to ide-rust not knowing where to find the sources of rust, which can be found at /usr/lib/rustlib/src/rust/src/. How can I tell ide-rust where to find those sources without using rustup?

[alexheretic]

Currently ide-rust requires rustup to work. I wouldn't have thought much would work as we startup rls using rustup. Rustup is vital if you want to switch toolchain, or just use the nightly toolchain which is required for some packages.

It's possible we could add a failover to using rls binary on your path if rustup is not found and disable all the toolchain stuff we have.

[msrd0]

Sounds good.

However, the thing is for some reason there is a rustup binary in my .cargo folder, I have no idea who put it there (this is the reason I dislike using a thousand different package managers). So I'd like to have a flag that I can check to disable the use of rustup entirely.

[alexheretic]

I've made a release that will allow your usage. I decided for now not to add to the settings another option that conflicts with the current rustup-dependant ones.

However, you can achieve what you want by using the hidden rlsCommandOverride config that already existed, 0.16.3 enhances it a little to allow errorless usage in environment without rustup.

If you update to the latest ide-rust and:

• Click Edit/Config
• Find "ide-rust" and add the override

  # config.cson
    ...
    "ide-rust":
       rlsCommandOverride: "rls"

• Restart atom

After this ide-rust will startup rls using rls on your path. No rustup required.

Sufficient?

[msrd0]

Thanks, this works fine.