gocode

An autocompletion daemon for the Go programming language IMPORTANT: This project is not maintained anymore, consider using https://pkg.go.dev/golang.org/x/tools/gopls, a tool which provides similar functionality and more, created and maintained by Go team. Gocode is a helper tool which is intended to be integrated with your source code editor, like vim, neovim and emacs. It provides several advanced capabilities, which currently includes: Context-sensitive autocompletion It is called daemon, because it uses client/server architecture for caching purposes. In particular, it makes autocompletions very fast. Typical autocompletion time with warm cache is 30ms, which is barely noticeable. Also watch the demo screencast. Setup You should have a correctly installed Go compiler environment and your personal workspace ($GOPATH). If you have no idea what $GOPATH is, take a look here. Please make sure that your $GOPATH/bin is available in your $PATH. This is important, because most editors assume that gocode binary is available in one of the directories, specified by your $PATH environment variable. Otherwise manually copy the gocode binary from $GOPATH/bin to a location which is part of your $PATH after getting it in step 2. Do these steps only if you understand why you need to do them: export GOPATH=$HOME/goprojects export PATH=$PATH:$GOPATH/bin Then you need to get the appropriate version of the gocode, for 6g/8g/5g compiler you can do this: go get -u github.com/nsf/gocode (-u flag for "update") Windows users should consider doing this instead: go get -u -ldflags -H=windowsgui github.com/nsf/gocode That way on the Windows OS gocode will be built as a GUI application and doing so solves hanging window issues with some of the editors. Next steps are editor specific. See below. Vim setup Vim manual installation Note: As of go 1.5 there is no $GOROOT/misc/vim script. Suggested installation is via vim-go plugin. In order to install vim scripts, you need to fulfill the following steps: Install official Go vim scripts from $GOROOT/misc/vim. If you did that already, proceed to the step 2. Install gocode vim scripts. Usually it's enough to do the following: 2.1. vim/update.sh update.sh script does the following: #!/bin/sh mkdir -p "$HOME/.vim/autoload" mkdir -p "$HOME/.vim/ftplugin/go" cp "${0%/*}/autoload/gocomplete.vim" "$HOME/.vim/autoload" cp "${0%/*}/ftplugin/go/gocomplete.vim" "$HOME/.vim/ftplugin/go" 2.2. Alternatively, you can create symlinks using symlink.sh script in order to avoid running update.sh after every gocode update. symlink.sh script does the following: #!/bin/sh cd "${0%/*}" ROOTDIR=`pwd` mkdir -p "$HOME/.vim/autoload" mkdir -p "$HOME/.vim/ftplugin/go" ln -s "$ROOTDIR/autoload/gocomplete.vim" "$HOME/.vim/autoload/" ln -s "$ROOTDIR/ftplugin/go/gocomplete.vim" "$HOME/.vim/ftplugin/go/" Make sure vim has filetype plugin enabled. Simply add that to your .vimrc: filetype plugin on Autocompletion should work now. Use <C-x><C-o> for autocompletion (omnifunc autocompletion). Using Vundle in Vim Add the following line to your .vimrc: Plugin 'nsf/gocode', {'rtp': 'vim/'} And then update your packages by running :PluginInstall. Using vim-plug in Vim Add the following line to your .vimrc: Plug 'nsf/gocode', { 'rtp': 'vim', 'do': '~/.vim/plugged/gocode/vim/symlink.sh' } And then update your packages by running :PlugInstall. Other Alternatively take a look at the vundle/pathogen friendly repo: https://github.com/Blackrush/vim-gocode. Neovim setup Neovim manual installation Neovim users should also follow Vim manual installation, except that you should goto gocode/nvim in step 2, and remember that, the Neovim configuration file is ~/.config/nvim/init.vim. Using Vundle in Neovim Add the following line to your init.vim: Plugin 'nsf/gocode', {'rtp': 'nvim/'} And then update your packages by running :PluginInstall. Using vim-plug in Neovim Add the following line to your init.vim: Plug 'nsf/gocode', { 'rtp': 'nvim', 'do': '~/.config/nvim/plugged/gocode/nvim/symlink.sh' } And then update your packages by running :PlugInstall. Emacs setup In order to install emacs script, you need to fulfill the following steps: Install auto-complete-mode Copy emacs/go-autocomplete.el file from the gocode source distribution to a directory which is in your 'load-path' in emacs. Add these lines to your .emacs: (require 'go-autocomplete) (require 'auto-complete-config) (ac-config-default) Also, there is an alternative plugin for emacs using company-mode. See emacs-company/README for installation instructions. If you're a MacOSX user, you may find that script useful: https://github.com/purcell/exec-path-from-shell. It helps you with setting up the right environment variables as Go and gocode require it. By default it pulls the PATH, but don't forget to add the GOPATH as well, e.g.: (when (memq window-system '(mac ns)) (exec-path-from-shell-initialize) (exec-path-from-shell-copy-env "GOPATH")) Options You can change all available options using gocode set command. The config file uses json format and is usually stored somewhere in ~/.config/gocode directory. On windows it's stored in the appropriate AppData folder. It's suggested to avoid modifying config file manually, do that using the gocode set command. gocode set lists all options and their values. gocode set <option> shows the value of that option. gocode set <option> <value> sets the new value for that option. propose-builtins A boolean option. If true, gocode will add built-in types, functions and constants to autocompletion proposals. Default: false. lib-path A string option. Allows you to add search paths for packages. By default, gocode only searches $GOPATH/pkg/$GOOS_$GOARCH and $GOROOT/pkg/$GOOS_$GOARCH in terms of previously existed environment variables. Also you can specify multiple paths using ':' (colon) as a separator (on Windows use semicolon ';'). The paths specified by lib-path are prepended to the default ones.