nvim: Add support for LSP in status line

Signed-off-by: Sanchayan Maity <maitysanchayan@gmail.com>

nvim/.config/nvim/init.vim

@@ -64,6 +64,7 @@ Plug 'voldikss/vim-floaterm'
 " LSP
 Plug 'neovim/nvim-lspconfig'
 Plug 'nvim-lua/diagnostic-nvim'
+Plug 'nvim-lua/lsp-status.nvim'
 " Language support & syntax highlighting
 " Haskell
 Plug 'neovimhaskell/haskell-vim'

nvim/.config/nvim/lua/lsp.lua

@@ -1,4 +1,7 @@
 local nvim_lsp = require('nvim_lsp')
+local diagnostic = require('diagnostic')
+local completion = require('completion')
+local lsp_status = require('lsp-status')
 
 -- Taken from https://www.reddit.com/r/neovim/comments/gyb077/nvimlsp_peek_defination_javascript_ttserver/
 function preview_location(location, context, before_context)
@@ -42,10 +45,11 @@ function peek_definition()
   end
 end
 
-local on_attach = function(_, bufnr)
+local on_attach = function(client, bufnr)
   vim.api.nvim_buf_set_option(bufnr, 'omnifunc', 'v:lua.vim.lsp.omnifunc')
-  require'diagnostic'.on_attach()
-  require'completion'.on_attach()
+  diagnostic.on_attach(client, bufnr)
+  completion.on_attach(client, bufnr)
+  lsp_status.on_attach(client, bufnr)
 
   local opts = { noremap=true, silent=true }
   vim.api.nvim_buf_set_keymap(bufnr, 'n', 'gd', '<cmd>lua vim.lsp.buf.definition()<CR>', opts)
@@ -69,7 +73,18 @@ end
 
 local servers = { 'hls', 'purescriptls', 'rust_analyzer' }
 for _, lsp in ipairs(servers) do
+  lsp_status.register_progress()
+  lsp_status.config({
+    status_symbol = '',
+    indicator_errors = 'e',
+    indicator_warnings = 'w',
+    indicator_info = 'i',
+    indicator_hint = 'h',
+    indicator_ok = '✔️',
+    spinner_frames = { '⣾', '⣽', '⣻', '⢿', '⡿', '⣟', '⣯', '⣷' },
+  })
   nvim_lsp[lsp].setup {
-  on_attach = on_attach,
+    on_attach = on_attach,
+    capabilities = lsp_status.capabilities
 }
 end

nvim/.config/nvim/plugin/statusline.vim

@@ -33,12 +33,20 @@ function! GetFileStatus()
   return len(l:status) > 0 ? ' ' . l:status : ''
 endfunction
 
+function! LspStatus() abort
+  if luaeval('#vim.lsp.buf_get_clients() > 0')
+    return luaeval("require('lsp-status').status()")
+  endif
+  return ''
+endfunction
+
 function! ActiveStatus() abort
   let statusline=""
   let statusline.="%1*\ %{winnr()}\ "
   let statusline.="%4*\ %{GetFileStatus()}"
   let statusline.="%2*\ %Y\ "
   let statusline.="%3*%<%f"
+  let statusline.="%4%\ %{LspStatus()}"
   let statusline.="%="
   let statusline.="%4*\ %{GetCursorPosition()}\ (%3p%%)"
   return statusline
@@ -50,6 +58,7 @@ function! PassiveStatus() abort
   let statusline.="%8*\ %{GetFileStatus()}"
   let statusline.="%6*\ %Y\ "
   let statusline.="%7*%<%f"
+  let statusline.="%8%\ %{LspStatus()}"
   let statusline.="%="
   let statusline.="%8*\ %{GetCursorPosition()}\ (%3p%%)"
   return statusline