Emacs 中使用Go语言支持（go-mode）

安装

在菜单栏 Options – Manage Emacs Packages 中找到 go-mode 并安装

使用 go-mode

格式化代码 gofmt

  1. 手动格式化当前buffer：M-x gofmt
  2. 保存文件前，自动调用hook： (add-hook 'before-save-hook 'gofmt-before-save)

管理 imports

The new go-mode has three functions for working with imports:

  • go-import-add
  • go-remove-unused-imports
  • go-goto-imports.

go-import-add

  • go-import-add, bound to C-c C-a by default
    • will prompt you for an import path(again supporting tab completion) and insert it in the import block, creating it if necessary.

  • If an import already existed but was commented, it will be uncommented.

  • If prefixed with C-u, it will ask you for an alias

go-remove-unused-imports

  • go-mode will detect all unused imports and delete them (or comment them) once you run go-remove-unused-imports.
  • 默认 没有 绑定快捷键
    • 可以自己设置，go-mode作者绑定到 C-c C-r 
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      (add-hook 'go-mode-hook (lambda ()
     (local-set-key (kbd "C-c C-r") 'go-remove-unused-imports)))`

go-goto-imports

  • go-goto-imports 自动跳转到 imports 代码的地方
  • 默认 没有 绑定快捷键
    • 可以自己设置 
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      (add-hook 'go-mode-hook (lambda ()
                          (local-set-key (kbd "C-c i") 'go-goto-imports)))
  • 支持 beginning-of-defun (C-M-a)
  • 支持 end-of-defun (C-M-e)
  • godef-describe is bound to C-c C-d
  • godef-jump is bound to C-c C-j

安装goimports，gocode等有用工具

goimports

goimports命令能自动格式化代码，自动添加、移除imports，而且与Emacs集成良好。可以替代官方gofmt命令。

安装命令: go get -u golang.org/x/tools/cmd/goimports

gocode

gocode命令能为代码自动补全提供后台支持，是Emacs下Go代码补全必不可少的backend。

安装命令: go get -u github.com/nsf/gocode

godef

godef命令能在Go源码变量、函数定义间跳转，是查看变量、函数、文件定义的好助手。

安装命令： go get github.com/rogpeppe/godef