Rust#
Server#
For more information about the LSP server, check rls.
Installation#
For more instructions on how to install manually, check here.
Debugger: Yes#
root_file: docs/manual-language-docs/lsp-rust-rls.md#
RLS#
Customization#
This is an incomplete list of the available options
-
lsp-rust-rls-server-commandchange command to start RLS -
lsp-rust-show-hover-contextturn off hover tooltips
rustfmt#
Code formatting with rustfmt can be configured with:
lsp-rust-rustfmt-path change default path for rustfmt executable
To enable automatic code format on save, add this to your init.el (rust-mode is assumed to be installed):
(add-hook 'before-save-hook (lambda () (when (eq 'rust-mode major-mode)
(lsp-format-buffer))))
Available configurations#
lsp-rust-server#
Type: (choice (const :tag rls rls) (const :tag rust-analyzer rust-analyzer))
Default: rust-analyzer
Choose LSP server.
lsp-rust-all-features#
Type: boolean
Default: nil
Enable all Cargo features.
lsp-rust-all-targets#
Type: boolean
Default: t
Checks the project as if you were running cargo check --all-targets. I.e., check all targets and integration tests too.
lsp-rust-build-bin#
Type: (choice (const :tag None nil) (string :tag Binary))
Default: nil
If non-nil, checks the project as if you passed -- bin <build_bin>
argument to cargo.
Mutually exclusive with lsp-rust-build-lib. (Unstable)
lsp-rust-build-command#
Type: (choice (const :tag None nil) (string :tag Command))
Default: nil
EXPERIMENTAL (requires rust.unstable_features)
If set, executes a given program responsible for rebuilding save-analysis to be
loaded by the RLS. The program given should output a list of resulting .json
files on stdout.
Implies rust.build_on_save: true.
lsp-rust-build-lib#
Type: boolean
Default: nil
If non-nil, checks the project as if you passed the --lib argument to
cargo.
Mutually exclusive with, and preferred over, lsp-rust-build-bin. (Unstable)
lsp-rust-build-on-save#
Type: boolean
Default: nil
Only index the project when a file is saved and not on change.
lsp-rust-cfg-test#
Type: boolean
Default: nil
If non-nil, checks the project as if you were running cargo test rather
than cargo build.
I.e., compiles (but does not run) test code.
lsp-rust-clear-env-rust-log#
Type: boolean
Default: t
Clear the RUST_LOG environment variable before running rustc or cargo.
lsp-rust-clippy-preference#
Type: (choice (const on) (const opt-in) (const off))
Default: opt-in
Controls eagerness of clippy diagnostics when available.
Valid values are (case-insensitive):
- "off": Disable clippy lints.
- "opt-in": Clippy lints are shown when crates specify #![warn(clippy)].
- "on": Clippy lints enabled for all crates in workspace.
You need to install clippy via rustup if you haven`t already.
lsp-rust-crate-blocklist#
Type: lsp-string-vector
Default: [cocoa gleam glium idna libc openssl rustc_serialize serde serde_json typenum unicode_normalization unicode_segmentation winapi]
A list of Cargo crates to blocklist.
lsp-rust-features#
Type: lsp-string-vector
Default: []
List of features to activate.
Set this to "all" to pass --all-features to cargo.
lsp-rust-full-docs#
Type: boolean
Default: nil
Instructs cargo to enable full documentation extraction during save-analysis while building the crate.
lsp-rust-jobs#
Type: (choice (const :tag Auto nil) (number :tag Jobs))
Default: nil
Number of Cargo jobs to be run in parallel.
lsp-rust-library-directories#
Type: (repeat string)
Default: (~/.cargo/registry/src ~/.rustup/toolchains)
List of directories which will be considered to be libraries.
lsp-rust-no-default-features#
Type: boolean
Default: nil
Do not enable default Cargo features.
lsp-rust-racer-completion#
Type: boolean
Default: t
Enables code completion using racer.
lsp-rust-rls-server-command#
Type: (repeat string)
Default: (rls)
Command to start RLS.
lsp-rust-rustflags#
Type: (choice (const :tag None nil) (string :tag Flags))
Default: nil
Flags added to RUSTFLAGS.
lsp-rust-rustfmt-path#
Type: (choice (const :tag Bundled nil) (string :tag Path))
Default: nil
When specified, RLS will use the Rustfmt pointed at the path instead of the bundled one
lsp-rust-show-hover-context#
Type: boolean
Default: t
Show additional context in hover tooltips when available. This is often the type local variable declaration.
lsp-rust-show-warnings#
Type: boolean
Default: t
Show warnings.
lsp-rust-sysroot#
Type: (choice (const :tag None nil) (string :tag Sysroot))
Default: nil
If non-nil, use the given path as the sysroot for all rustc invocations instead of trying to detect the sysroot automatically.
lsp-rust-target#
Type: (choice (const :tag None nil) (string :tag Target))
Default: nil
If non-nil, use the given target triple for all rustc invocations.
lsp-rust-target-dir#
Type: (choice (const :tag Default nil) (string :tag Directory))
Default: nil
When specified, it places the generated analysis files at the specified target directory. By default it is placed target/rls directory.
lsp-rust-unstable-features#
Type: boolean
Default: nil
Enable unstable features.
lsp-rust-wait-to-build#
Type: (choice (const :tag Auto nil) (number :tag Time))
Default: nil
Time in milliseconds between receiving a change notification and starting build. If not specified, automatically inferred by the latest build duration.