Rust-analyzer: Autocomplete needs to aggressively listen to new packages in toml

[Matelasse]

I noticed a very cool feature in the Jetbrains IDE. They basically watch cargo.toml for any new additions, and once you write something new (without actually downloading the new packages with cargo) you get completions for those new packages. In rust-analyzer, we need to also install the added packages with cargo, before RA is able to provide completions for those packages. Not sure how Jetbrains Rust actually implemented this feature, it doesn't seem trivial to me.

[matklad]

Here’s it he initial implementation from IntelliJ Rust: https://github.com/intellij-rust/intellij-rust/commit/8f5434d24db90dc61a9cc6ae8f54f459a119cb0b :D

[Matelasse]

Here’s it he initial implementation from IntelliJ Rust: intellij-rust/intellij-rust@8f5434d :D

I was going to mention you in the issue to ask if you had any idea how intellij implemented it... :smile:

[kjeremy]

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