Managing rust versions:

https://doc.rust-lang.org/nightly/edition-guide/rust-2018/rustup-for-managing-rust-versions.html

rustup set profile default/nightly - to change profiles
https://github.com/rust-lang/rustup

rustup toolchain list

rustup toolchain install stable/nightly 

rustup component add rls rust-analysis rust-src

rustup component list | grep installed

rust-analysis rust-src rustfmt-preview rls-preview


rust-management.sublime-project
```
{
    "folders":
    [
        {
            "path": "/Users/dtomlinson/projects-rust"
        },
        {
            "path": "/Users/dtomlinson/git-repos"
        }
    ],
    "settings":
    {
        "LSP":
        {
            "log_debug": true,
            "log_payloads": false,
            "log_server": true,
            "log_stderr": true,
            "only_show_lsp_completions": false,
            "rls":
            {
                "enabled": true
            }
        },
        "cargo_build":
        {
            "defaults":
            {
                "toolchain": "nightly"
            }
        },
        "rust_syntax_checking": false
    }
}
```

https://www.reddit.com/r/rust/comments/a40www/sublime_text_3_question/