I feel like there is a missed opportunity at emacs-racer working automagically without extra install steps.
From the terminal $ racer complete use std::io::B works just fine, even though I did not explicitly install Rust sources using $ rustup component add rust-src. However, from Emacs I get the following error when trying to complete:
completion--some: No such directory: /usr/local/Cellar/rust/1.34.0/lib/rustlib/src/rust/src. Please set ‘racer-rust-src-path’ or ‘RUST_SRC_PATH’.
My feeling that there is a missed opportunity stems from the fact that, when I remove the check causing this error from racer--call, I get the right completions.
I changed:
(defun racer--call (command &rest args)
"Call racer command COMMAND with args ARGS.
Return stdout if COMMAND exits normally, otherwise show an
error."
(let ((rust-src-path (or (when racer-rust-src-path (expand-file-name racer-rust-src-path))
(getenv "RUST_SRC_PATH")))
(cargo-home (or (when racer-cargo-home (expand-file-name racer-cargo-home))
(getenv "CARGO_HOME"))))
(when (null rust-src-path)
(user-error "You need to set `racer-rust-src-path' or `RUST_SRC_PATH'"))
(unless (file-exists-p rust-src-path)
(user-error "No such directory: %s. Please set `racer-rust-src-path' or `RUST_SRC_PATH'"
rust-src-path))
(let ((default-directory (or (racer--cargo-project-root) default-directory))
(process-environment (append (list
(format "RUST_SRC_PATH=%s" rust-src-path)
(format "CARGO_HOME=%s" cargo-home))
process-environment)))
(-let [(exit-code stdout _stderr)
(racer--shell-command racer-cmd (cons command args))]
;; Use `equal' instead of `zero' as exit-code can be a string
;; "Aborted" if racer crashes.
(unless (equal 0 exit-code)
(user-error "%s exited with %s. `M-x racer-debug' for more info"
racer-cmd exit-code))
stdout))))
to:
(defun racer--call (command &rest args)
"Call racer command COMMAND with args ARGS.
Return stdout if COMMAND exits normally, otherwise show an
error."
(let ((rust-src-path (or (when racer-rust-src-path (expand-file-name racer-rust-src-path))
(getenv "RUST_SRC_PATH")))
(cargo-home (or (when racer-cargo-home (expand-file-name racer-cargo-home))
(getenv "CARGO_HOME"))))
(let ((default-directory (or (racer--cargo-project-root) default-directory)))
(-let [(exit-code stdout _stderr)
(racer--shell-command racer-cmd (cons command args))]
;; Use `equal' instead of `zero' as exit-code can be a string
;; "Aborted" if racer crashes.
(unless (equal 0 exit-code)
(user-error "%s exited with %s. `M-x racer-debug' for more info"
racer-cmd exit-code))
stdout))))
and started getting the right completions when pressing after use std::io::B.
I am not sure what to think about it as I don't have global knowledge about Racer, Emacs-racer, and even about Rust as I am a beginner.
I need insight from someone more experienced with this codebase. Am I right in thinking that there is room for improvement ? If so, how, and would there be tradeoffs ?
I feel like there is a missed opportunity at emacs-racer working automagically without extra install steps.
From the terminal
$ racer complete use std::io::B
works just fine, even though I did not explicitly install Rust sources using$ rustup component add rust-src
. However, from Emacs I get the following error when trying to complete:completion--some: No such directory: /usr/local/Cellar/rust/1.34.0/lib/rustlib/src/rust/src. Please set ‘racer-rust-src-path’ or ‘RUST_SRC_PATH’
.My feeling that there is a missed opportunity stems from the fact that, when I remove the check causing this error from
racer--call
, I get the right completions.I changed:
to:
and started getting the right completions when pressing after
use std::io::B
.I am not sure what to think about it as I don't have global knowledge about Racer, Emacs-racer, and even about Rust as I am a beginner.
I need insight from someone more experienced with this codebase. Am I right in thinking that there is room for improvement ? If so, how, and would there be tradeoffs ?