add clippy support to rust and show detailed diagnostics on hover

lua/keys.lua

@@ -3,6 +3,7 @@ local u = require('utils')
 
 vim.cmd([[autocmd bufenter * if (winnr("$") == 1 && exists("b:NERDTree") && b:NERDTree.isTabTree()) | q | endif]])
 vim.cmd([[autocmd BufNewFile,BufRead *.md setlocal filetype=notes]])
+vim.cmd([[autocmd CursorHold * lua vim.lsp.diagnostic.show_line_diagnostics()]])
 
 key('n', ';', ':Files<CR>', {})
 key('', '<C-n>', ':NERDTreeToggle<CR>', {})

lua/lsp.lua

@@ -64,6 +64,9 @@ for _, lsp in ipairs(servers) do
   if lsp == "lua" then
     config.settings = require'lsp.lua'
   end
+  if lsp == "rust" then
+    config.settings = require'lsp.rust'
+  end
   nvim_lsp[lsp].setup(config)
 end
 

lua/lsp/rust.lua

@@ -0,0 +1,19 @@
+local M = {
+  ['rust-analyzer'] = {
+     assist = {
+       importGranularity = "module",
+       importPrefix = "by_self",
+     },
+     cargo = {
+       loadOutDirsFromCheck = true
+     },
+     procMacro = {
+       enable = true
+     },
+     checkOnSave = {
+       command = "clippy"
+     },
+  }
+}
+
+return M