emacs开发环境配置(4)——rust开发环境

一、参考

emacs系列文章目录——更新ing

emacs rust-mode

Configuring Emacs for Rust development

My Emacs Rust Language Config

二、希望实现的特性

特性	描述
源码之间移动	找到函数的源码为止，回到函数引用处
代码自动填充
代码语法检查和错误高亮
代码语法规范化
cargo编译和运行

三、通过emacs-racer实现

3.1 依赖安装

程序	安装
rust	非emacs包
cargo	非emacs包
rust-mode	M-x package-install rust-mode
cargo	M-x package-install cargo
racer	非emacs包

rustup toolchain add nightly
rustup component add rust-src
cargo +nightly install racer

3.2 更新配置

;; started from http://emacs-bootstrap.com/

;; rust-mode
;; https://github.com/rust-lang/rust-mode
(use-package rust-mode
  :bind ( :map rust-mode-map
               (("C-c C-t" . racer-describe)
                ([?\t] .  company-indent-or-complete-common)))
  :config
  (progn
    ;; add flycheck support for rust (reads in cargo stuff)
    ;; https://github.com/flycheck/flycheck-rust
    (use-package flycheck-rust)

    ;; cargo-mode for all the cargo related operations
    ;; https://github.com/kwrooijen/cargo.el
    (use-package cargo
      :hook (rust-mode . cargo-minor-mode)
      :bind
      ("C-c C-c C-n" . cargo-process-new)) ;; global binding

;;; racer-mode for getting IDE like features for rust-mode
    ;; https://github.com/racer-rust/emacs-racer
    (use-package racer
      :hook (rust-mode . racer-mode)
      :config
      (progn
        ;; package does this by default ;; set racer rust source path environment variable
        ;; (setq racer-rust-src-path (getenv "RUST_SRC_PATH"))
        (defun my-racer-mode-hook ()
          (set (make-local-variable 'company-backends)
               '((company-capf company-files)))
          (setq company-minimum-prefix-length 1)
          (setq indent-tabs-mode nil))

        (add-hook 'racer-mode-hook 'my-racer-mode-hook)

        ;; enable company and eldoc minor modes in rust-mode (racer-mode)
        (add-hook 'racer-mode-hook #'company-mode)
        (add-hook 'racer-mode-hook #'eldoc-mode)))

    (add-hook 'rust-mode-hook 'flycheck-mode)
    (add-hook 'flycheck-mode-hook 'flycheck-rust-setup)

    ;; format rust buffers on save using rustfmt
    (add-hook 'before-save-hook
              (lambda ()
                (when (eq major-mode 'rust-mode)
                  (rust-format-buffer))))))

3.3 最终配置

(use-package rust-mode
  :mode
  (("\\.rs\\'" . rust-mode))
  :hook
  (rust-mode . global-linum-mode) ;; 行显示
  (rust-mode . hs-minor-mode) ;; 折叠模式
  (rust-mode . eldoc-mode) ;; 代码追踪
  (rust-mode . company-mode) ;; 自动填充
  (rust-mode . cargo-minor-mode)
  (rust-mode . racer-mode)
  (rust-mode . flycheck-mode)
  (flycheck-mode . flycheck-rust-setup)
  (rust-mode . (lambda () (setq indent-tabs-mode nil))) ;; 设置缩进

  :config
  (setq rust-format-on-save t) ;; 设置格式化
  )