dot-vimrc

" 
" neovim configuration file that on my typical development environment lives in
" ~/.config/nvim/init.vim
"

" =============================================================================================
" vim-plug
" =============================================================================================

call plug#begin('~/.config/nvim/plugged')

Plug 'altercation/vim-colors-solarized'
Plug 'chrisbra/csv.vim'
Plug 'elzr/vim-json'
Plug 'fatih/vim-go'
Plug 'flazz/vim-colorschemes'
Plug 'junegunn/fzf', { 'do': { -> fzf#install() } }
Plug 'junegunn/fzf.vim'
Plug 'majutsushi/tagbar'
Plug 'mileszs/ack.vim'
Plug 'neoclide/coc.nvim', {'branch': 'release'}
Plug 'neomake/neomake'
" TODO: verify if this conflicts with other plugins
" Plug 'nvim-treesitter/nvim-treesitter', {'do': ':TSUpdate'}
Plug 'sudar/comments.vim'
Plug 'scrooloose/nerdtree'
Plug 'tpope/vim-fugitive'
Plug 'SirVer/ultisnips' | Plug 'honza/vim-snippets'
Plug 'vim-airline/vim-airline'

"download from https://github.com/protocolbuffers/protobuf/blob/main/editors/proto.vim
Plug '~/.config/nvim/plugged/protocolbuffers/proto.vim'

call plug#end()


" =============================================================================================
" Basic settings
" =============================================================================================
syntax on

set ai                  " set autoindenting on
set autowrite
set bs=2                " always allow backspacing in insert mode
set clipboard+=unnamed  " Allow to use system clipboard
set cursorline          " draws a horizontal highlight on the line your cursor is currently on
set encoding=utf-8
set expandtab
"set foldmethod=indent
set hidden
set hlsearch
set ic                  " ignores case in searches
set incsearch           " searches as you type
set laststatus=2        " Always display a status line at the bottom of the window 
set mouse=a             " Enable mouse in a terminal for all modes
set nocompatible        " vim settings rather than vi settings
set nosmartindent
set number
set ruler               " always display cursor
set scrolloff=1         " minimum lines between cursor and window edge
set shell=/bin/zsh      " For TERMINAL mode
set showcmd             " show commands while they're being typed
set showmatch           " shows matching parenthesis, bracket, or brace
set showmode            " displays mode in status line
set showtabline=2
set smartcase           " Make search case sensitive only if it contains uppercase letters
set smartcase           " match 'word' case-insensitive / 'Word' case-sensitive
set splitbelow          " Splitting a window will put the new window below the current
set splitright          " Splitting a window will put the new window right of the current
set textwidth=120       " maximum line width
set title
set ttimeoutlen=50
set wildmenu            " visual autocomplete for command menu
set wrap

scriptencoding utf8



" -----------------------------------------------------
" Nathan's key mapping overrides
" -----------------------------------------------------
" See https://vim.fandom.com/wiki/Mapping_keys_in_Vim_-_Tutorial_(Part_1)#Listing_key_maps

tnoremap <Esc> <C-\><C-n>   " swtich from TERMINAL mode to NORMAL

" https://github.com/neoclide/coc.nvim/issues/3044, coc uses <C-o>
nmap <C-t> <C-o>            " go back to previous definition cursor
nmap ;6 <C-^><CR>           " go back to previously opened file
nmap ;n :set nonumber<CR>   " set nonumber
nmap ;c :NeomakeClean<CR>   " clear neomake signs and column

" Better split switching
nnoremap <C-j> <C-W>j
nnoremap <C-k> <C-W>k
nnoremap <C-h> <C-W>h
nnoremap <C-l> <C-W>l

" -----------------------------------------------------
" fzf (installed via homebrew)
" -----------------------------------------------------
set rtp+=/opt/homebrew/bin/fzf
nmap <C-f> :FZF<CR>

" -----------------------------------------------------
" FileType settings
" -----------------------------------------------------
filetype on
filetype indent on
filetype plugin on

autocmd FileType python setlocal shiftwidth=4 softtabstop=4
autocmd FileType go     setlocal sw=8 tabstop=8
autocmd FileType java   setlocal sw=4 tabstop=4
autocmd FileType scala  setlocal sw=2 tabstop=2
autocmd FileType sh     setlocal sw=2 tabstop=2
autocmd FileType yaml   setlocal sw=2 tabstop=2
autocmd FileType proto  setlocal sw=2 tabstop=2
autocmd FileType c,cpp  setlocal sw=2 tabstop=2
autocmd FileType html   setlocal sw=4 tabstop=4
autocmd FileType js     setlocal sw=2 tabstop=2


" =============================================================================================
" Background and Colorscheme
" =============================================================================================
colorscheme PaperColor
set background=dark

function! ToggleBackground()
  if &background =~# 'light'
    set background=dark
  else
    set background=light
  endif
endfunction

nmap ;b :call ToggleBackground()<CR>

" Adjust background (light/dark) based on time of day
"if 6 < strftime("%H") && strftime("%H") < 21
  "set background=light
"else
  "set background=dark
"endif

" Adjust background (ligh/dark) based on terminal profile
if $TERM_PROFILE == 'basic'
  set background=light
endif
if $TERM_PROFILE == 'pro'
  set background=dark
endif


" =============================================================================================
" Plugin Settings
" =============================================================================================

" -----------------------------------------------------
" NERDTree settings {{{
" -----------------------------------------------------
" autocmd VimEnter * NERDTree
nmap ;t :NERDTreeToggle<CR>
let g:NERDTreeShowHidden=1
let g:NERDTreeHighlightCursorline=0
" }}}

" -----------------------------------------------------
" tagbar settings {{{
" -----------------------------------------------------
nmap ;\ :TagbarToggle<CR>
" }}}

" -----------------------------------------------------
" Ultisnips settings {{{
" -----------------------------------------------------
let g:UltiSnipsUsePythonVersion=3
let g:UltiSnipsExpandTrigger = "<C-l>"
"}}}

" -----------------------------------------------------
" vim-json settings
" -----------------------------------------------------
autocmd FileType json setlocal foldmethod=syntax
" }}}

" -----------------------------------------------------
" coc.vim
" -----------------------------------------------------
" content below is borrowed from https://github.com/neoclide/coc.nvim#readme

" Some servers have issues with backup files, see #649.
set nobackup
set nowritebackup

" Having longer updatetime (default is 4000 ms = 4 s) leads to noticeable
" delays and poor user experience.
set updatetime=300

" Always show the signcolumn, otherwise it would shift the text each time
" diagnostics appear/become resolved.
set signcolumn=yes

" Use tab for trigger completion with characters ahead and navigate.
" NOTE: There's always complete item selected by default, you may want to enable
" no select by `"suggest.noselect": true` in your configuration file.
" NOTE: Use command ':verbose imap <tab>' to make sure tab is not mapped by
" other plugin before putting this into your config.
inoremap <silent><expr> <TAB>
      \ coc#pum#visible() ? coc#pum#next(1) :
      \ CheckBackspace() ? "\<Tab>" :
      \ coc#refresh()
inoremap <expr><S-TAB> coc#pum#visible() ? coc#pum#prev(1) : "\<C-h>"

" Make <CR> to accept selected completion item or notify coc.nvim to format
" <C-g>u breaks current undo, please make your own choice.
inoremap <silent><expr> <CR> coc#pum#visible() ? coc#pum#confirm()
                              \: "\<C-g>u\<CR>\<c-r>=coc#on_enter()\<CR>"

function! CheckBackspace() abort
  let col = col('.') - 1
  return !col || getline('.')[col - 1]  =~# '\s'
endfunction

" Use <c-space> to trigger completion.
if has('nvim')
  inoremap <silent><expr> <c-space> coc#refresh()
else
  inoremap <silent><expr> <c-@> coc#refresh()
endif

" Use `[g` and `]g` to navigate diagnostics
" Use `:CocDiagnostics` to get all diagnostics of current buffer in location list.
nmap <silent> [g <Plug>(coc-diagnostic-prev)
nmap <silent> ]g <Plug>(coc-diagnostic-next)

" GoTo code navigation.
nmap <silent> gd <Plug>(coc-definition)
nmap <silent> gy <Plug>(coc-type-definition)
nmap <silent> gi <Plug>(coc-implementation)
nmap <silent> gr <Plug>(coc-references)

" Use K to show documentation in preview window.
nnoremap <silent> K :call ShowDocumentation()<CR>

function! ShowDocumentation()
  if CocAction('hasProvider', 'hover')
    call CocActionAsync('doHover')
  else
    call feedkeys('K', 'in')
  endif
endfunction

" Highlight the symbol and its references when holding the cursor.
autocmd CursorHold * silent call CocActionAsync('highlight')

" Symbol renaming.
nmap <leader>rn <Plug>(coc-rename)

" Formatting selected code.
xmap <leader>f  <Plug>(coc-format-selected)
nmap <leader>f  <Plug>(coc-format-selected)

augroup mygroup
  autocmd!
  " Setup formatexpr specified filetype(s).
  autocmd FileType typescript,json setl formatexpr=CocAction('formatSelected')
  " Update signature help on jump placeholder.
  autocmd User CocJumpPlaceholder call CocActionAsync('showSignatureHelp')
augroup end

" Applying codeAction to the selected region.
" Example: `<leader>aap` for current paragraph
xmap <leader>a  <Plug>(coc-codeaction-selected)
nmap <leader>a  <Plug>(coc-codeaction-selected)

" Remap keys for applying codeAction to the current buffer.
nmap <leader>ac  <Plug>(coc-codeaction)
" Apply AutoFix to problem on the current line.
nmap <leader>qf  <Plug>(coc-fix-current)

" Run the Code Lens action on the current line.
nmap <leader>cl  <Plug>(coc-codelens-action)

" Map function and class text objects
" NOTE: Requires 'textDocument.documentSymbol' support from the language server.
xmap if <Plug>(coc-funcobj-i)
omap if <Plug>(coc-funcobj-i)
xmap af <Plug>(coc-funcobj-a)
omap af <Plug>(coc-funcobj-a)
xmap ic <Plug>(coc-classobj-i)
omap ic <Plug>(coc-classobj-i)
xmap ac <Plug>(coc-classobj-a)
omap ac <Plug>(coc-classobj-a)

" Remap <C-f> and <C-b> for scroll float windows/popups.
" Disabling these <C-f> interferes with :FZF key mapping
" And because Fn + Up and Fn + Down are already cover the scroll operations
if has('nvim-0.4.0') || has('patch-8.2.0750')
  "nnoremap <silent><nowait><expr> <C-f> coc#float#has_scroll() ? coc#float#scroll(1) : "\<C-f>"
  "nnoremap <silent><nowait><expr> <C-b> coc#float#has_scroll() ? coc#float#scroll(0) : "\<C-b>"
  "inoremap <silent><nowait><expr> <C-f> coc#float#has_scroll() ? "\<c-r>=coc#float#scroll(1)\<cr>" : "\<Right>"
  "inoremap <silent><nowait><expr> <C-b> coc#float#has_scroll() ? "\<c-r>=coc#float#scroll(0)\<cr>" : "\<Left>"
  "vnoremap <silent><nowait><expr> <C-f> coc#float#has_scroll() ? coc#float#scroll(1) : "\<C-f>"
  "vnoremap <silent><nowait><expr> <C-b> coc#float#has_scroll() ? coc#float#scroll(0) : "\<C-b>"
endif

" Use CTRL-S for selections ranges.
" Requires 'textDocument/selectionRange' support of language server.
nmap <silent> <C-s> <Plug>(coc-range-select)
xmap <silent> <C-s> <Plug>(coc-range-select)

" Add `:Format` command to format current buffer.
command! -nargs=0 Format :call CocActionAsync('format')

" Add `:Fold` command to fold current buffer.
command! -nargs=? Fold :call     CocAction('fold', <f-args>)

" Add `:OR` command for organize imports of the current buffer.
command! -nargs=0 OR   :call     CocActionAsync('runCommand', 'editor.action.organizeImport')

" Add (Neo)Vim's native statusline support.
" NOTE: Please see `:h coc-status` for integrations with external plugins that
" provide custom statusline: lightline.vim, vim-airline.
set statusline^=%{coc#status()}%{get(b:,'coc_current_function','')}

" Mappings for CoCList
" Show all diagnostics.
nnoremap <silent><nowait> <space>a  :<C-u>CocList diagnostics<cr>
" Manage extensions.
nnoremap <silent><nowait> <space>e  :<C-u>CocList extensions<cr>
" Show commands.
nnoremap <silent><nowait> <space>c  :<C-u>CocList commands<cr>
" Find symbol of current document.
nnoremap <silent><nowait> <space>o  :<C-u>CocList outline<cr>
" Search workspace symbols.
nnoremap <silent><nowait> <space>s  :<C-u>CocList -I symbols<cr>
" Do default action for next item.
nnoremap <silent><nowait> <space>j  :<C-u>CocNext<CR>
" Do default action for previous item.
nnoremap <silent><nowait> <space>k  :<C-u>CocPrev<CR>
" Resume latest coc list.
nnoremap <silent><nowait> <space>p  :<C-u>CocListResume<CR>

let g:coc_disable_startup_warning = 1
" }}}

" -----------------------------------------------------
" python provider settings
" -----------------------------------------------------
" https://neovim.io/doc/user/provider.html
"let g:loaded_python3_provider = 1
let g:python3_host_prog = '/Users/nathan/.pyenv/versions/verse-dev-3.11.2/bin/python3'

" -----------------------------------------------------
" vim-go settings
" -----------------------------------------------------
"  See https://github.com/fatih/vim-go/blob/master/doc/vim-go.txt
let g:go_add_tags_transform = "camelcase"
let g:go_alternate_mode = "vsplit"
let g:go_auto_sameids = 1
let g:go_auto_type_info = 1
let g:go_fmt_command = "goimports" " use goimports rather than gofmt on save
let g:go_fmt_experimental = 1
let g:go_fmt_fail_silently = 1
let g:go_gocode_unimported_packages = 1
let g:go_list_type = "quickfix"
let g:go_highlight_array_whitespace_error = 1
let g:go_highlight_chan_whitespace_error = 1
let g:go_highlight_extra_types = 1
let g:go_highlight_space_tab_error = 1
let g:go_highlight_trailing_whitespace_error = 0
let g:go_highlight_operators = 1
let g:go_highlight_functions = 1
let g:go_highlight_function_parameters = 1
let g:go_highlight_function_calls = 1
let g:go_highlight_types = 1
let g:go_highlight_fields = 1
let g:go_highlight_build_constraints = 1
let g:go_highlight_generate_tags = 1
let g:go_highlight_string_spellcheck = 1
let g:go_highlight_format_strings = 1
let g:go_highlight_variable_declarations = 1
let g:go_highlight_variable_assignments = 1
" let g:go_highlight_build_constraints = 1
" let g:go_highlight_fields = 1
" let g:go_highlight_operators = 1
" let g:go_highlight_functions = 1
" let g:go_highlight_interfaces = 1
" let g:go_highlight_methods = 1
" let g:go_highlight_types = 1
" let g:go_highlight_extra_types = 1
let g:go_metalinter_autosave=1
let g:go_metalinter_autosave_enabled=['golint', 'govet']
" More accurate than godoc but too slow
" let g:go_info_mode="guru"
" let g:go_updatetime=1500
let g:go_snippet_case_type = "camelcase"
" let g:go_term_enabled=1 " run commands in a terminal rather than the quickfix window
" let g:go_term_mode="split"
autocmd Filetype go command! -bang A call go#alternate#Switch(<bang>0, 'edit')
autocmd Filetype go command! -bang AV call go#alternate#Switch(<bang>0, 'vsplit')
autocmd Filetype go command! -bang AS call go#alternate#Switch(<bang>0, 'split')
autocmd Filetype go command! -bang AT call go#alternate#Switch(<bang>0, 'tabe')
autocmd FileType go nmap <buffer> <leader>e <plug>(go-rename)
autocmd FileType go nmap <buffer> <leader>i <plug>(go-info)
autocmd FileType go nmap <buffer> <leader>d <plug>(go-describe)
autocmd FileType go nmap <leader>r <Plug>(go-run)
autocmd FileType go nmap <leader>b <Plug>(go-build)
autocmd FileType go nmap <leader>t <Plug>(go-test)
autocmd FileType go nmap <Leader>c <Plug>(go-coverage-toggle)
autocmd FileType go nmap <Leader>f :GoDeclsDir<CR>
autocmd FileType go nmap <Leader>s :GoDefStack<CR>
autocmd FileType go nmap <Leader>p :GoChannelPeers<CR>
" N.B. 'K' in normal mode runs :GoDoc

nnoremap <leader>a :cclose<CR>

" run :GoBuild or :GoTestCompile based on the go 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

autocmd FileType go nmap <leader>b :<C-u>call <SID>build_go_files()<CR>

" }}}

" -----------------------------------------------------
" Neomake settings {{{
" -----------------------------------------------------
autocmd! BufWritePost * Neomake
let g:neomake_error_sign   = {'text': '✖', 'texthl': 'NeomakeErrorSign'}
let g:neomake_warning_sign = {'text': '∆', 'texthl': 'NeomakeWarningSign'}
let g:neomake_message_sign = {'text': '➤', 'texthl': 'NeomakeMessageSign'}
let g:neomake_info_sign    = {'text': 'ℹ', 'texthl': 'NeomakeInfoSign'}
"let g:neomake_go_enabled_makers = [ 'go', 'golangci_lint' ]
"let g:neomake_go_golangci_lint_args = [
  "\   'run',
  "\   '--fast',
  "\   '--out-format=line-number',
  "\   '--print-issued-lines=false',
  "\ ]
  
let g:neomake_go_enabled_makers = [ 'go', 'gometalinter' ]
let g:neomake_go_gometalinter_maker = {
  \ 'args': [
  \   '--tests',
  \   '--enable-gc',
  \   '--concurrency=4',
  \   '--fast',
  \   '-D', 'aligncheck',
  \   '-D', 'dupl',
  \   '-D', 'gocyclo',
  \   '-D', 'gotype',
  \   '-E', 'errcheck',
  \   '-E', 'misspell',
  \   '-E', 'unused',
  \   '%:p:h',
  \ ],
  \ 'append_file': 0,
  \ 'errorformat':
  \   '%E%f:%l:%c:%trror: %m,' .
  \   '%W%f:%l:%c:%tarning: %m,' .
  \   '%E%f:%l::%trror: %m,' .
  \   '%W%f:%l::%tarning: %m'
  \ }
" }}}


" -----------------------------------------------------
" csv-vim settings {{{
" -----------------------------------------------------
let b:csv_headerline = 1
" }}}

" -----------------------------------------------------
" Ack settings {{{
" -----------------------------------------------------
" Use rg instead of ack (it's 10x faster)
let g:ackprg = 'rg'
"}}}