go.vim

set number
filetype plugin indent on
set showmatch
set shiftwidth =4
set tabstop=4
set encoding=utf-8
set hlsearch
set autoindent
set clipboard=unnamed
set nocursorcolumn              " Do not highlight column (speeds up highlighting)
set nocursorline 
set backspace=2

call plug#begin('~/.vim/plugged')
"""""""""""""""""""""
"      Plugins      "
"""""""""""""""""""""
Plug 'vim-airline/vim-airline'
Plug 'vim-airline/vim-airline-themes'
Plug 'fatih/vim-go'
Plug 'tpope/vim-surround'
Plug 'mhinz/vim-startify'
Plug 'scrooloose/nerdtree'
Plug 'tpope/vim-commentary'
Plug 'neoclide/coc.nvim', {'branch': 'release'}
Plug 'dense-analysis/ale'
Plug 'majutsushi/tagbar'
Plug 'easymotion/vim-easymotion'
Plug '/usr/local/opt/fzf'
Plug 'jiangmiao/auto-pairs'
Plug 'junegunn/gv.vim'
Plug 'junegunn/fzf.vim'
Plug 'SirVer/ultisnips'
Plug 'honza/vim-snippets'
Plug 'fatih/molokai'
Plug 'tpope/vim-fugitive'
call plug#end()

" Enable to copy to clipboard for operations like yank, delete, change and put
" http://stackoverflow.com/questions/20186975/vim-mac-how-to-copy-to-clipboard-without-pbcopy
if has('unnamedplus')
  set clipboard^=unnamed
  set clipboard^=unnamedplus
endif

" This enables us to undo files even if you exit Vim.
if has('persistent_undo')
  set undofile
  set undodir=~/.config/vim/tmp/undo//
endif

" Colorscheme
syntax enable
set t_Co=256
let g:rehash256 = 1
let g:molokai_original = 1
colorscheme molokai

" Set leader shortcut to a comma ','. By default it's the backslash
let mapleader = ','


" vim-go
let g:go_fmt_command = 'goimports'
let g:go_autodetect_gopath = 1
" let g:go_bin_path = '$GOBIN'

let g:go_highlight_types = 1
let g:go_highlight_fields = 1
let g:go_highlight_functions = 1
let g:go_highlight_function_calls = 1
let g:go_highlight_extra_types = 1
let g:go_highlight_generate_tags = 1

" Open :GoDeclsDir with ctrl-g
nmap <C-g> :GoDeclsDir<cr>
imap <C-g> <esc>:<C-u>GoDeclsDir<cr>

augroup go
  autocmd!
  autocmd BufNewFile,BufRead *.go setlocal noexpandtab tabstop=4 shiftwidth=4
augroup END

" build_go_files is a custom function that builds or compiles the test file.
" It calls :GoBuild if its a Go file, or :GoTestCompile if it's a test file
function! s:build_go_files()
  let l:file = expand('%')
  if l:file =~# '^\f\+_test\.go$'
    call go#test#Test(0, 1)
  elseif l:file =~# '^\f\+\.go$'
    call go#cmd#Build(0)
  endif
endfunction

map <leader>f :Files<CR>
map <leader>b :Buffers<CR>
let g:fzf_action = { 'ctrl-e': 'edit' }
" 用 leader+ag 搜索当前 cursor 下单词 see: https://github.com/junegunn/fzf.vim/issues/50
nnoremap <silent> <Leader>ag :Ag <C-R><C-W><CR>

nnoremap <leader>v :NERDTreeFind<cr>
nnoremap <leader>g :NERDTreeToggle<cr>

nnoremap <leader>t :TagbarToggle<cr>
nmap ss <Plug>(easymotion-s2)

" ale-setting {{{
let g:ale_set_highlights = 1
let g:ale_set_quickfix = 1
"自定义error和warning图标
let g:ale_sign_error = '✗'
let g:ale_sign_warning = '⚡'
"在vim自带的状态栏中整合ale
let g:ale_statusline_format = ['✗ %d', '⚡ %d', '✔ OK']
"显示Linter名称,出错或警告等相关信息
let g:ale_echo_msg_error_str = 'E'
let g:ale_echo_msg_warning_str = 'W'
let g:ale_echo_msg_format = '[%linter%] %s [%severity%]'
"打开文件时不进行检查
let g:ale_lint_on_enter = 1

"普通模式下，sp前往上一个错误或警告，sn前往下一个错误或警告
nmap sp <Plug>(ale_previous_wrap)
nmap sn <Plug>(ale_next_wrap)
"<Leader>s触发/关闭语法检查
" nmap <Leader>l :ALEToggle<CR>
"<Leader>d查看错误或警告的详细信息
nmap <Leader>d :ALEDetail<CR>
let g:ale_linters = {
    \ 'go': ['golint', 'go vet', 'go fmt'],
	\ 'python': ['flake8', 'pylint'],
	\ 'rust': ['cargo'],
    \ }

" Remap keys for gotos
" nmap <silent> gd <Plug>(coc-definition)
nmap <silent> gy <Plug>(coc-type-definition)
nmap <silent> gm <Plug>(coc-implementation)
nmap <silent> gr <Plug>(coc-references)
inoremap <expr> <cr> pumvisible() ? "\<C-y>" : "\<C-g>u\<CR>"

nnoremap <silent> K :call <SID>show_documentation()<CR>
function! s:show_documentation()
  if (index(['vim','help'], &filetype) >= 0)
    execute 'h '.expand('<cword>')
  else
    call CocAction('doHover')
  endif
endfunction
" Jump to next error with Ctrl-n and previous error with Ctrl-m. Close the
" quickfix window with <leader>a
map <C-n> :cnext<CR>
map <C-m> :cprevious<CR>
nnoremap <leader>a :cclose<CR>