rust-lang / rust-lang/rust-analyzer

Honor build.target-dir from .cargo/config.toml

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A-cargo A-config C-feature
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Rust
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Description

This is a follow-up to:

  • #18296
  • #18827

With that PR, rust-analyzer honors the environment variable CARGO_TARGET_DIR but this is not the only location users may change the target directory.

The other option is using target-dir in the Cargo config:
https://doc.rust-lang.org/cargo/reference/config.html#buildtarget-dir
Which rust-analyzer still doesn't honor.

Due to the same reasoning it was decided R-A should honor CARGO_TARGET_DIR, i would request that this config be honored as well.

Contributor guide

Open the contributing guide

First steps

  1. Read the whole issue, then the project's contributing guide.
  2. Comment on the issue to say you are picking it up — it saves two people doing the same work.
  3. Fork the repository and make your change on a branch.
  4. Open a pull request that references the issue number.

Research direction

Start by tracing rust-analyzer’s existing handling of CARGO_TARGET_DIR and how it reads Cargo configuration, then compare that with Cargo’s build.target-dir setting. Done means rust-analyzer uses the configured target directory in .cargo/config.toml as well as the environment-variable path, with behavior checked against the linked follow-up context.

Written by the indexing model from the issue text.

Assessment

Tech stack
rust
Domain
devtools
Issue type
Feature
Difficulty
3/5
Estimated time
1-2 days
Activity status
Stale
Clarity
Mostly clear
Newbie friendliness
45/100

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