Emacs development environment configuration (4)-rust development environment

One, reference

emacs series article directory-update ing

emacs rust-mode

Configuring Emacs for Rust development

My Emacs Rust Language Config

Second, the desired characteristics

characteristic	describe
Move between source code	Until the source code of the function is found, go back to the function reference
Code auto-fill
Code syntax checking and error highlighting
Code syntax standardization
cargo compile and run

3. emacs-racer

3.1 Dependent installation

program	Install
rust	Non-emacs package
cargo	Non-emacs package
rust-mode	M-x package-install rust-mode
cargo	M-x package-install cargo
racer	Non-emacs package

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

3.2 Update configuration

;; 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 Final configuration

(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
  )