nvim: switch from CoC to built-in LSP

Just for testing for now, to see how it performs.

1 files changed, 88 insertions, 82 deletions

diff --git a/neovim/.config/nvim/init.vim b/neovim/.config/nvim/init.vim
index 93066ff..3ee0203 100644
--- a/neovim/.config/nvim/init.vim
+++ b/neovim/.config/nvim/init.vim
@@ -82,83 +82,11 @@ Plug 'fisadev/FixedTaskList.vim'
 " from this plugin is disabled
 "Plug 'davidhalter/jedi-vim'
 
-Plug 'neoclide/coc.nvim', {'branch': 'release'}
-" Use tab for trigger completion with characters ahead and navigate.
-" 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>
-      \ pumvisible() ? "\<C-n>" :
-      \ <SID>check_back_space() ? "\<TAB>" :
-      \ coc#refresh()
-inoremap <expr><S-TAB> pumvisible() ? "\<C-p>" : "\<C-h>"
-
-function! s:check_back_space() abort
-  let col = col('.') - 1
-  return !col || getline('.')[col - 1]  =~# '\s'
-endfunction
-
-" Use <c-space> to trigger completion.
-inoremap <silent><expr> <c-space> coc#refresh()
-
-" Use <cr> to confirm completion, `<C-g>u` means break undo chain at current
-" position. Coc only does snippet and additional edit on confirm.
-if has('patch8.1.1068')
-  " Use `complete_info` if your (Neo)Vim version supports it.
-  inoremap <expr> <cr> complete_info()["selected"] != "-1" ? "\<C-y>" : "\<C-g>u\<CR>"
-else
-  imap <expr> <cr> pumvisible() ? "\<C-y>" : "\<C-g>u\<CR>"
-endif
+Plug 'neovim/nvim-lspconfig'
 
-" Use `[g` and `]g` to navigate diagnostics
-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 <SID>show_documentation()<CR>
-
-function! s:show_documentation()
-  if (index(['vim','help'], &filetype) >= 0)
-    execute 'h '.expand('<cword>')
-  else
-    call CocAction('doHover')
-  endif
-endfunction
+Plug 'simrat39/symbols-outline.nvim'
 
-" 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)
-" Add `:Format` command to format current buffer.
-command! -nargs=0 Format :call CocAction('format')
-" Mappings using CoCList:
-" Show all diagnostics.
-nnoremap <silent> <space>a  :<C-u>CocList diagnostics<cr>
-" Manage extensions.
-nnoremap <silent> <space>e  :<C-u>CocList extensions<cr>
-" Show commands.
-nnoremap <silent> <space>c  :<C-u>CocList commands<cr>
-" Find symbol of current document.
-nnoremap <silent> <space>o  :<C-u>CocList outline<cr>
-" Search workspace symbols.
-nnoremap <silent> <space>s  :<C-u>CocList -I symbols<cr>
-" Do default action for next item.
-nnoremap <silent> <space>j  :<C-u>CocNext<CR>
-" Do default action for previous item.
-nnoremap <silent> <space>k  :<C-u>CocPrev<CR>
-" Resume latest coc list.
-nnoremap <silent> <space>p  :<C-u>CocListResume<CR>
-" -- END COC SETUP --
+Plug 'nvim-lua/lsp-status.nvim'
 
 " Automatically close parenthesis, etc
 "Plug 'Townk/vim-autoclose'
@@ -222,6 +150,89 @@ Plug 'rust-lang/rust.vim'
 " Tell vim-plug we finished declaring plugins, so it can load them
 call plug#end()
 
+lua << EOF
+local lsp_status = require('lsp-status')
+local kind_labels_mt = {__index = function(_, k) return k end}
+local kind_labels = {}
+setmetatable(kind_labels, kind_labels_mt)
+
+lsp_status.register_progress()
+lsp_status.config({
+  kind_labels = kind_labels,
+  indicator_errors = "×",
+  indicator_warnings = "!",
+  indicator_info = "i",
+  indicator_hint = "›",
+  -- the default is a wide codepoint which breaks absolute and relative
+  -- line counts if placed before airline's Z section
+  status_symbol = "",
+})
+
+local nvim_lsp = require('lspconfig')
+
+-- Use an on_attach function to only map the following keys
+-- after the language server attaches to the current buffer
+local on_attach = function(client, bufnr)
+  local function buf_set_keymap(...) vim.api.nvim_buf_set_keymap(bufnr, ...) end
+  local function buf_set_option(...) vim.api.nvim_buf_set_option(bufnr, ...) end
+
+  -- Enable completion triggered by <c-x><c-o>
+  buf_set_option('omnifunc', 'v:lua.vim.lsp.omnifunc')
+
+  -- Mappings.
+  local opts = { noremap=true, silent=true }
+
+  buf_set_keymap('i', '<c-space>', '<c-x><c-o>', opts)
+
+  -- See `:help vim.lsp.*` for documentation on any of the below functions
+  buf_set_keymap('n', 'gD', '<cmd>lua vim.lsp.buf.declaration()<CR>', opts)
+  buf_set_keymap('n', 'gd', '<cmd>lua vim.lsp.buf.definition()<CR>', opts)
+  buf_set_keymap('n', 'K', '<cmd>lua vim.lsp.buf.hover()<CR>', opts)
+  buf_set_keymap('n', 'gi', '<cmd>lua vim.lsp.buf.implementation()<CR>', opts)
+  buf_set_keymap('n', '<C-k>', '<cmd>lua vim.lsp.buf.signature_help()<CR>', opts)
+  buf_set_keymap('n', '<space>wa', '<cmd>lua vim.lsp.buf.add_workspace_folder()<CR>', opts)
+  buf_set_keymap('n', '<space>wr', '<cmd>lua vim.lsp.buf.remove_workspace_folder()<CR>', opts)
+  buf_set_keymap('n', '<space>wl', '<cmd>lua print(vim.inspect(vim.lsp.buf.list_workspace_folders()))<CR>', opts)
+  buf_set_keymap('n', 'gy', '<cmd>lua vim.lsp.buf.type_definition()<CR>', opts)
+  buf_set_keymap('n', '<space>rn', '<cmd>lua vim.lsp.buf.rename()<CR>', opts)
+  buf_set_keymap('n', '<space>ca', '<cmd>lua vim.lsp.buf.code_action()<CR>', opts)
+  buf_set_keymap('n', 'gr', '<cmd>lua vim.lsp.buf.references()<CR>', opts)
+  buf_set_keymap('n', '<space>e', '<cmd>lua vim.lsp.diagnostic.show_line_diagnostics()<CR>', opts)
+  buf_set_keymap('n', '[d', '<cmd>lua vim.lsp.diagnostic.goto_prev()<CR>', opts)
+  buf_set_keymap('n', ']d', '<cmd>lua vim.lsp.diagnostic.goto_next()<CR>', opts)
+  buf_set_keymap('n', '<space>q', '<cmd>lua vim.lsp.diagnostic.set_loclist()<CR>', opts)
+  buf_set_keymap('n', '<space>f', '<cmd>lua vim.lsp.buf.formatting()<CR>', opts)
+
+  lsp_status.on_attach(client)
+end
+
+-- Use a loop to conveniently call 'setup' on multiple servers and
+-- map buffer local keybindings when the language server attaches
+local servers = { 'clangd', 'hls', 'rust_analyzer' }
+for _, lsp in ipairs(servers) do
+  nvim_lsp[lsp].setup {
+    on_attach = on_attach,
+    flags = {
+      debounce_text_changes = 150,
+    },
+    capabilities = lsp_status.capabilities
+  }
+end
+
+EOF
+
+nmap <silent><space>s :SymbolsOutline<CR>
+nmap <F4> :SymbolsOutline<CR>
+
+function! LspStatus() abort
+  return trim(luaeval("require('lsp-status').status()"))
+endfunction
+call airline#parts#define_function('lsp_status', 'LspStatus')
+call airline#parts#define_condition('lsp_status', 'luaeval("#vim.lsp.buf_get_clients() > 0")')
+let g:airline#extensions#nvimlsp#enabled = 0
+let g:airline_section_warning = airline#section#create_right(['lsp_status'])
+
+
 " ============================================================================
 " Install plugins the first time vim runs
 
@@ -279,13 +290,6 @@ autocmd BufWritePre *.py :%s/\s\+$//e
 " Plugins settings and mappings
 " Edit them as you wish.
 
-" Tagbar -----------------------------
-
-" toggle tagbar display
-map <F4> :TagbarToggle<CR>
-" autofocus on tagbar open
-let g:tagbar_autofocus = 1
-
 " NERDTree -----------------------------
 
 " toggle nerdtree display
@@ -393,6 +397,8 @@ let g:airline#extensions#whitespace#enabled = 0
 "let g:airline_symbols.readonly = '⭤'
 "let g:airline_symbols.linenr = '⭡'
 
+let g:vimtex_view_method = 'zathura'
+
 set clipboard=unnamedplus inccommand=nosplit
 set mouse=a
 let g:tex_flavor = "latex"