internal: use current folder's rustfmt.toml with all rustfmt configurations

[davidbarsky]

Introduction

Resolves #15540. I moved the chdir functionality outside of the match to ensure that this functionality wouldn’t fall through again. As part of this PR, I also changed from_proto::file_range to accept a TextDocumentIdentifier by reference instead of by value, but I can undo this change if desired.

Testing

I added a rustfmt.toml will the contents below at crates/rust-analyzer/rustfmt.toml:


reorder_modules = false
use_small_heuristics = "Max"
# this is the only difference from the `rustfmt.toml` at the root of the repo
tab_spaces = 8

In addition, I've also added "rust-analyzer.rustfmt.overrideCommand": ["rustfmt"] to my VS Code configuration.

With the above changes, saving crates/rust-analyzer/src/handlers/request.rs results in 8-space indentation. Meanwhile, saving crates/toolchain/src/lib.rs does not result in any formatting changes.

[Veykril]

Thanks!
@bors r+

[bors]

📌 Commit 42f77f8 has been approved by Veykril

It is now in the queue for this repository.

[bors]

⌛ Testing commit 42f77f8 with merge a843e46...

[bors]

☀️ Test successful - checks-actions
Approved by: Veykril
Pushing a843e46 to master...

[RalfJung]

I'm afraid this has caused new problems: #15595