Go development tools

In this section, I'm going to show you a few IDEs that can help you become a more efficient programmer, with capabilities such as intelligent code completion and auto-formatting. They are all cross-platform, so the steps I will be showing you should not be very different, even if you are not using the same operating system.

LiteIDE

LiteIDE is an open source, lightweight IDE for developing Go projects only, developed by visualfc.

LiteIDE features.

Cross-platform
- Windows
- Linux
- Mac OS
Cross-compile
- Manage multiple compile environments
- Supports cross-compilation of Go
Project management standard
- Documentation view based on $GOPATH
- Compilation system based on $GOPATH
- API documentation index based on $GOPATH
Go source code editor
- Code outlining
- Full support of gocode
- Go documentation view and API index
- View code expression using F1
- Function declaration jump using F2
- Gdb support
- Auto-format with gofmt
Others
- Multi-language
- Plugin system
- Text editor themes
- Syntax support based on Kate
- intelligent completion based on full-text
- Customized shortcuts
- Markdown support
  - Real-time preview
  - Customized CSS
  - Export HTML and PDF
  - Convert and merge to HTML and PDF

LiteIDE installation

Install LiteIDE
- You need to install Go first, then download the version appropriate for your operating system. Decompress the package to directly use it.
Install gocode
You have to install gocode in order to use intelligent completion
```
  go get -u github.com/nsf/gocode
```
Compilation environment
Switch configuration in LiteIDE to suit your operating system. In Windows and using the 64-bit version of Go, you should choose win64 as the configuration environment in the tool bar. Then, choose Options, find LiteEnv in the left list and open file win64.env in the right list.
```
  GOROOT=c:\go
  GOBIN=
  GOARCH=amd64
  GOOS=windows
  CGO_ENABLED=1

  PATH=%GOBIN%;%GOROOT%\bin;%PATH%
  。。。
```
Replace GOROOT=c:\go to your Go installation path, save it. If you have MinGW64, add c:\MinGW64\bin to your path environment variable for cgo support.
In Linux and using the 64-bit version of Go, you should choose linux64 as the configuration environment in the tool bar. Then, choose Options, find LiteEnv in the left list and open the linux64.env file in the right list.
```
  GOROOT=$HOME/go
  GOBIN=
  GOARCH=amd64
  GOOS=linux
  CGO_ENABLED=1

  PATH=$GOBIN:$GOROOT/bin:$PATH   
  。。。
```
Replace GOROOT=$HOME/go to your Go installation path, save it.
$GOPATH
$GOPATH is the path that contains a list of projects. Open the command tool (or press Ctrl+` in LiteIDE), then type go help gopath for more details.
It's very easy to view and change $GOPATH in LiteIDE. Follow View - Setup GOPATH to view and change these values.

Sublime Text

Here I'm going to introduce you the Sublime Text 3 (Sublime for short) + GoSublime + gocode. Let me explain why.

Intelligent completion
Figure 1.5 Sublime intelligent completion
Auto-format source files
Project management
Figure 1.6 Sublime project management
Syntax highlight
Free trial forever with no functional limitations. You may be prompted once in a while to remind you to purchase a license, but you can simply ignore it if you wish. Of course, if you do find that it enhances your productivity and you really enjoy using it, please purchase a copy of it and support its continued development!

Press Ctrl+` , open the command tool and input the following commands.
Applicable to Sublime Text 3：

import  urllib.request,os;pf='Package Control.sublime-package';ipp=sublime.installed_packages_path();urllib.request.install_opener(urllib.request.build_opener(urllib.request.ProxyHandler()));open(os.path.join(ipp,pf),'wb').write(urllib.request.urlopen('http://sublime.wbond.net/'+pf.replace(' ','%20')).read())

Applicable to Sublime Text 2：

import  urllib2,os;pf='Package Control.sublime-package';ipp=sublime.installed_packages_path();os.makedirs(ipp)ifnotos.path.exists(ipp)elseNone;urllib2.install_opener(urllib2.build_opener(urllib2.ProxyHandler()));open(os.path.join(ipp,pf),'wb').write(urllib2.urlopen('http://sublime.wbond.net/'+pf.replace(' ','%20')).read());print('Please restart Sublime Text to finish installation')

Restart Sublime Text when the installation has finished. You should then find a Package Control option in the Preferences menu.

To install GoSublime, SidebarEnhancements and Go Build, press Ctrl+Shift+p to open Package Control, then type pcip (short for "Package Control: Install Package").
Figure 1.8 Sublime Install Packages
Now type in "GoSublime", press OK to install the package, and repeat the same steps for installing SidebarEnhancements and Go Build. Once again, restart the editor when it completes the installation.
To verify that the installation is successful, open Sublime, then open the main.go file to see if it has the proper syntax highlighting. Type import to see if code completion prompts appear. After typing import "fmt", type fmt. anywhere after the import declaration to see whether or not intelligent code completion for functions was successfully enabled.
If everything is fine, you're all set.
If not, check your $PATH again. Open a terminal, type gocode. If it does not run, your $PATH was not configured correctly.

Vim

Vim is a popular text editor for programmers, which evolved from its slimmer predecessor, Vi. It has functions for intelligent completion, compilation and jumping to errors.

vim-go is vim above an open-source go language using the most extensive development environment plug-ins

1.Install Vundle

mkdir ~/.vim/bundle
git clone https://github.com/gmarik/Vundle.vim.git ~/.vim/bundle/Vundle.vim

set nocompatible              " be iMproved, required
filetype off                  " required

" set the runtime path to include Vundle and initialize
set rtp+=~/.vim/bundle/Vundle.vim
call vundle#begin()

" let Vundle manage Vundle, required
Plugin 'gmarik/Vundle.vim'

" All of your Plugins must be added before the following line
call vundle#end()            " required
filetype plugin indent on    " required

2.Install Vim-go

Edit ~/.vimrc，Add a line between vundle #begin and vundle #end：

Plugin 'fatih/vim-go'

Executed within Vim: PluginInstall

3.Install YCM(Your Complete Me) to AutoComplete Add a line to ~ / .vimrc:

Plugin 'Valloric/YouCompleteMe'

Executed within Vim: PluginInstall

Syntax highlighting for Go

```
 cp -r $GOROOT/misc/vim/* ~/.vim/
```
Enabling syntax highlighting
```
 filetype plugin indent on
 syntax on
```
```
 go get -u github.com/nsf/gocode
```
gocode will be installed in $GOBIN as default

 ~ cd $GOPATH/src/github.com/nsf/gocode/vim
 ~ ./update.sh
 ~ gocode set propose-builtins true
 propose-builtins true
 ~ gocode set lib-path "/home/border/gocode/pkg/linux_amd64"
 lib-path "/home/border/gocode/pkg/linux_amd64"
 ~ gocode set
 propose-builtins true
 lib-path "/home/border/gocode/pkg/linux_amd64"

Explanation of gocode configuration:

propose-builtins: specifies whether or not to open intelligent completion; false by default. lib-path: gocode only searches for packages in $GOPATH/pkg/$GOOS_$GOARCH and $GOROOT/pkg/$GOOS_$GOARCH. This setting can be used to add additional paths.

Congratulations! Try :e main.go to experience the world of Go!

Emacs

Emacs is the so-called Weapon of God. She is not only an editor, but also a powerful IDE.

Syntax highlighting
```
 cp $GOROOT/misc/emacs/* ~/.emacs.d/
```
```
 go get -u github.com/nsf/gocode
```
gocode will be installed in $GOBIN as default

 ~ cd $GOPATH/src/github.com/nsf/gocode/vim
 ~ ./update.bash
 ~ gocode set propose-builtins true
 propose-builtins true
 ~ gocode set lib-path "/home/border/gocode/pkg/linux_amd64"
 lib-path "/home/border/gocode/pkg/linux_amd64"
 ~ gocode set
 propose-builtins true
 lib-path "/home/border/gocode/pkg/linux_amd64"

 ~ make install DIR=$HOME/.emacs.d/auto-complete

Configure ~/.emacs file

 ;;auto-complete
 (require 'auto-complete-config)
 (add-to-list 'ac-dictionary-directories "~/.emacs.d/auto-complete/ac-dict")
 (ac-config-default)
 (local-set-key (kbd "M-/") 'semantic-complete-analyze-inline)
 (local-set-key "." 'semantic-complete-self-insert)
 (local-set-key ">" 'semantic-complete-self-insert)

Configure .emacs

 ;; golang mode
 (require 'go-mode-load)
 (require 'go-autocomplete)
 ;; speedbar
 ;; (speedbar 1)
 (speedbar-add-supported-extension ".go")
 (add-hook
 'go-mode-hook
 '(lambda ()
     ;; gocode
     (auto-complete-mode 1)
     (setq ac-sources '(ac-source-go))
     ;; Imenu & Speedbar
     (setq imenu-generic-expression
         '(("type" "^type *\\([^ \t\n\r\f]*\\)" 1)
         ("func" "^func *\\(.*\\) {" 1)))
     (imenu-add-to-menubar "Index")
     ;; Outline mode
     (make-local-variable 'outline-regexp)
     (setq outline-regexp "//\\.\\|//[^\r\n\f][^\r\n\f]\\|pack\\|func\\|impo\\|cons\\|var.\\|type\\|\t\t*....")
     (outline-minor-mode 1)
     (local-set-key "\M-a" 'outline-previous-visible-heading)
     (local-set-key "\M-e" 'outline-next-visible-heading)
     ;; Menu bar
     (require 'easymenu)
     (defconst go-hooked-menu
         '("Go tools"
         ["Go run buffer" go t]
         ["Go reformat buffer" go-fmt-buffer t]
         ["Go check buffer" go-fix-buffer t]))
     (easy-menu-define
         go-added-menu
         (current-local-map)
         "Go tools"
         go-hooked-menu)

     ;; Other
     (setq show-trailing-whitespace t)
     ))
 ;; helper function
 (defun go ()
     "run current buffer"
     (interactive)
     (compile (concat "go run " (buffer-file-name))))

 ;; helper function
 (defun go-fmt-buffer ()
     "run gofmt on current buffer"
     (interactive)
     (if buffer-read-only
     (progn
         (ding)
         (message "Buffer is read only"))
     (let ((p (line-number-at-pos))
     (filename (buffer-file-name))
     (old-max-mini-window-height max-mini-window-height))
         (show-all)
         (if (get-buffer "*Go Reformat Errors*")
     (progn
         (delete-windows-on "*Go Reformat Errors*")
         (kill-buffer "*Go Reformat Errors*")))
         (setq max-mini-window-height 1)
         (if (= 0 (shell-command-on-region (point-min) (point-max) "gofmt" "*Go Reformat Output*" nil "*Go Reformat Errors*" t))
     (progn
         (erase-buffer)
         (insert-buffer-substring "*Go Reformat Output*")
         (goto-char (point-min))
         (forward-line (1- p)))
     (with-current-buffer "*Go Reformat Errors*"
     (progn
         (goto-char (point-min))
         (while (re-search-forward "<standard input>" nil t)
         (replace-match filename))
         (goto-char (point-min))
         (compilation-mode))))
         (setq max-mini-window-height old-max-mini-window-height)
         (delete-windows-on "*Go Reformat Output*")
         (kill-buffer "*Go Reformat Output*"))))
 ;; helper function
 (defun go-fix-buffer ()
     "run gofix on current buffer"
     (interactive)
     (show-all)
     (shell-command-on-region (point-min) (point-max) "go tool fix -diff"))

Congratulations, you're done! Speedbar is closed by default -remove the comment symbols in the line ;;(speedbar 1) to enable this feature, or you can use it through M-x speedbar.

Eclipse

Eclipse is also a great development tool. I'll show you how to use it to write Go programs.

Download gocode
gocode in Github.
```
 https://github.com/nsf/gocode
```
Install gocode in the command tool
```
 go get -u github.com/nsf/gocode
```
You can install from source code if you like.
Configure plugins.
Windows->Preferences->Go
(1).Configure Go compiler
Figure 1.12 Go Setting in Eclipse
(2).Configure gocode(optional), set gocode path to where the gocode.exe is.
Figure 1.13 gocode Setting
(3).Configure gdb(optional), set gdb path to where the gdb.exe is.
Figure 1.14 gdb Setting
Check the installation
Create a new Go project and hello.go file as following.
Figure 1.15 Create a new project and file
Test installation as follows.(you need to type command in console in Eclipse)
Figure 1.16 Test Go program in Eclipse

IntelliJ IDEA

People who have worked with Java should be familiar with this IDE. It supports Go syntax highlighting and intelligent code completion, implemented by a plugin.

Download IDEA, there is no difference between the Ultimate and Community editions
Install the Go plugin. Choose File - Setting - Plugins, then click Browser repo.
Search golang, double click download and install and wait for the download to complete.
Click Apply, then restart.
Now you can create a Go project.
Input the position of your Go sdk in the next step -basically it's your $GOROOT.

Visual Studio VSCode

It works with Windows, Mac, Linux. It has go package built, it provides code linting.

Atom

Atom is an awesome text editor released as open source cross platform, built on Electron , and based on everything we love about our favorite editors. We designed it to be deeply customizable, but still approachable using the default configuration.