rust-analyzer-causing-rebuilds.md

Rust-analyzer causing rebuilds

I have some slighly odd config to make rust-analyzer work (in vscode). This ends up with rust-analyzer running cargo in a quite different way to how I run cargo via the terminal. This means each time rust-analzyer runs cargo after I have run cargo from the terminal it forces a rebuild (and visa-versa). Fix is to make rust-analyzer's cargo use a completely seperate set of build artifacts to the cargo I run from the terminal. Add this to vscode's json settings:

{
    "rust-analyzer.cargo.extraEnv": {
        "CARGO_PROFILE_RUST_ANALYZER_INHERITS": "dev",
    },
    "rust-analyzer.cargo.extraArgs": [
        "--profile", "rust-analyzer"
    ]
}

Credit for this goes to rust-lang/rust-analyzer#6007 (comment)