yeet

.config/emacs/modules/lang/rust/config.el

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+;;; lang/rust/config.el -*- lexical-binding: t; -*-
+
+(after! projectile
+  (add-to-list 'projectile-project-root-files "Cargo.toml"))
+
+
+;;
+;;; Packages
+
+(use-package! rustic
+  :mode ("\\.rs$" . rustic-mode)
+  :init
+  (after! org-src
+    (defalias 'org-babel-execute:rust #'org-babel-execute:rustic)
+    (add-to-list 'org-src-lang-modes '("rust" . rustic)))
+  :config
+  (setq rustic-indent-method-chain t)
+
+  (set-docsets! 'rustic-mode "Rust")
+  (set-popup-rule! "^\\*rustic-compilation" :vslot -1)
+
+  ;; Leave automatic reformatting to the :editor format module.
+  (setq rustic-babel-format-src-block nil
+        rustic-format-trigger nil)
+
+  ;; HACK `rustic-flycheck' adds all these hooks in disruptive places. Instead,
+  ;;      leave it to our :checkers syntax module to do all the set up properly.
+  (remove-hook 'rustic-mode-hook #'flycheck-mode)
+  (remove-hook 'rustic-mode-hook #'flymake-mode-off)
+  (unless (featurep! +lsp)
+    (after! flycheck
+      (add-to-list 'flycheck-checkers 'rustic-clippy)))
+
+  ;; HACK `rustic-lsp' sets up lsp-mode/eglot too early. We move it to
+  ;;      `rustic-mode-local-vars-hook' so file/dir local variables can be used
+  ;;      to reconfigure them.
+  (when (featurep! +lsp)
+    (remove-hook 'rustic-mode-hook #'rustic-setup-lsp)
+    (add-hook 'rustic-mode-local-vars-hook #'rustic-setup-lsp)
+    (setq rustic-lsp-client
+          (if (featurep! :tools lsp +eglot)
+              'eglot
+            'lsp-mode)))
+
+  (map! :map rustic-mode-map
+        :localleader
+        (:prefix ("b" . "build")
+          :desc "cargo audit"      "a" #'+rust/cargo-audit
+          :desc "cargo build"      "b" #'rustic-cargo-build
+          :desc "cargo bench"      "B" #'rustic-cargo-bench
+          :desc "cargo check"      "c" #'rustic-cargo-check
+          :desc "cargo clippy"     "C" #'rustic-cargo-clippy
+          :desc "cargo doc"        "d" #'rustic-cargo-build-doc
+          :desc "cargo doc --open" "D" #'rustic-cargo-doc
+          :desc "cargo fmt"        "f" #'rustic-cargo-fmt
+          :desc "cargo new"        "n" #'rustic-cargo-new
+          :desc "cargo outdated"   "o" #'rustic-cargo-outdated
+          :desc "cargo run"        "r" #'rustic-cargo-run)
+        (:prefix ("t" . "cargo test")
+          :desc "all"          "a" #'rustic-cargo-test
+          :desc "current test" "t" #'rustic-cargo-current-test))
+
+  ;; If lsp/eglot isn't available, it attempts to install lsp-mode via
+  ;; package.el. Doom manages its own dependencies through straight so disable
+  ;; this behavior to avoid package-not-initialized errors.
+  (defadvice! +rust--dont-install-packages-a (&rest _)
+    :override #'rustic-install-lsp-client-p
+    (message "No LSP server running")))
+
+
+(use-package! racer
+  :unless (featurep! +lsp)
+  :hook (rustic-mode-local-vars . racer-mode)
+  :init
+  ;; HACK Fix #2132: `racer' depends on `rust-mode', which tries to modify
+  ;;      `auto-mode-alist'. We make extra sure that doesn't stick, especially
+  ;;      when a buffer is reverted, as it is after rustfmt is done with it.
+  (after! rust-mode
+    (setq auto-mode-alist (delete '("\\.rs\\'" . rust-mode) auto-mode-alist)))
+  :config
+  (set-lookup-handlers! 'rustic-mode
+    :definition '(racer-find-definition :async t)
+    :documentation '+rust-racer-lookup-documentation))