Moving to Doom Emacs!

.emacs.d/modules/lang/rust/doctor.el

@@ -0,0 +1,31 @@
+;; -*- lexical-binding: t; no-byte-compile: t; -*-
+;;; lang/rust/doctor.el
+
+(assert! (or (not (featurep! +lsp))
+             (featurep! :tools lsp))
+         "This module requires (:tools lsp)")
+
+(unless (executable-find "rustc")
+  (warn! "Couldn't find rustc binary"))
+
+(unless (executable-find "cargo")
+  (warn! "Couldn't find cargo binary"))
+
+(if (featurep! +lsp)
+    (let ((lsp-server 'rls))
+      (when (require 'rustic nil t)
+        (setq lsp-server rustic-lsp-server))
+      (pcase lsp-server
+        (`rust-analyzer
+         (unless (executable-find "ra_lsp_server")
+           (warn! "Couldn't find rust analyzer (ra_lsp_server)")))
+        (`rls
+         (unless (executable-find "rls")
+           (warn! "Couldn't find rls")))))
+  (when (require 'racer nil t)
+    ;; racer
+    (unless (file-exists-p racer-cmd)
+      (warn! "Couldn't find the racer binary at `racer-cmd'"))
+    ;; rust source code (rustup component add rust-src)
+    (unless (file-directory-p racer-rust-src-path)
+      (warn! "Couldn't find Rust's source code at RUST_SRC_PATH or `racer-rust-src-path'"))))