Add rust-mode support

Cask

@@ -146,15 +146,21 @@
 (depends-on "cmake-mode")
 (depends-on "glsl-mode")
 ;; Org
-;;(depends-on "org-plus-contrib")
+;; (depends-on "org-plus-contrib")
-;;(depends-on "org-opml" :git "https://github.com/edavis/org-opml")
+;; (depends-on "org-opml" :git "https://github.com/edavis/org-opml")
+;; (depends-on "org-bullets")
+;; (depends-on "org-tree-slide")
+;; Rust
+(depends-on "rust-mode")
+(depends-on "company-racer")
+(depends-on "racer")
+(depends-on "flycheck-rust")
 ;; Other
 (depends-on "swift-mode")
 (depends-on "vimrc-mode")
 (depends-on "crystal-mode" :git "https://github.com/jpellerin/emacs-crystal-mode/")
 
 ;; (depends-on "haxe-mode")
-(depends-on "rust-mode")
 ;; (depends-on "d-mode")
 
 ;; (depends-on "shaderlab-mode" :git "https://bitbucket.org/bbbscarter/emacs-shaderlab-mode")

modules/module-rust.el

@@ -0,0 +1,32 @@
+;;; module-rust.el
+
+;; NOTE Install instructions
+;; brew install rust
+;; git clone https://github.com/phildawes/racer.git ~
+;; cd ~/racer
+;; cargo build --release
+;; mv ~/racer/release/racer /usr/local/bin
+;; rm -rf ~/racer
+
+(use-package rust-mode
+  :mode "\\.rs$"
+  :config
+  (build-for! rust-mode "cargo run" "Cargo.toml")
+  (use-package flycheck-rust
+    :config (add-hook! rust-mode 'flycheck-mode))
+
+  (use-package racer
+    :config
+    (bind! :m "gd" 'racer-find-definition)
+    (setq racer-cmd "/usr/local/bin/racer"
+          racer-rust-src-path "~/Dropbox/lib/rust/src/")
+
+    (add-company-backend! rust-mode (racer))
+
+    (add-hook! rust-mode
+      (racer-activate)
+      (racer-turn-on-eldoc)
+      (add-hook! flycheck-mode 'flycheck-rust-setup))))
+
+(provide 'module-rust)
+;;; module-rust.el ends here

private/templates/rust-mode/@@Cargo.toml

@@ -0,0 +1,5 @@
+[package]
+name = "${1:Project Name}"
+version = "0.0.1"
+authors = [ "`user-full-name` <`user-mail-address`>" ]
+$0

private/templates/rust-mode/@@main.rs

@@ -0,0 +1,5 @@
+use std::io;
+
+fn main() {
+    ${0:println!("Hello, world!");}
+}