home: vim: lua: lsp: update for nvim 0.8

Two big changes:

* Making use of the lua API for creating autocmds.
* Using `client.supports_method`.

home/vim/lua/ambroisie/lsp.lua

@@ -18,22 +18,28 @@ M.on_attach = function(client, bufnr)
         severity_sort = true,
     })
 
-    vim.cmd([[
+    -- Show diagnostics on "hover"
-        augroup DiagnosticsHover
+    local augroup = vim.api.nvim_create_augroup("DiagnosticsHover", {})
-            autocmd! * <buffer>
+    vim.api.nvim_clear_autocmds({ group = augroup, buffer = bufnr })
-            " Show diagnostics on "hover"
+    vim.api.nvim_create_autocmd({"CursorHold", "CursorHoldI"}, {
-            autocmd CursorHold,CursorHoldI <buffer> lua vim.diagnostic.open_float(nil, {focus=false, scope="cursor"})
+        group = augroup,
-        augroup END
+        buffer = bufnr,
-    ]])
+        callback = function()
+            vim.diagnostic.open_float(nil, {focus=false, scope="cursor"})
+        end,
+    })
 
     -- Format on save
-    if client.resolved_capabilities.document_formatting then
+    if client.supports_method("textDocument/formatting") then
-        vim.cmd([[
+        local augroup = vim.api.nvim_create_augroup("LspFormatting", {})
-            augroup LspFormatting
+        vim.api.nvim_clear_autocmds({ group = augroup, buffer = bufnr })
-                autocmd! * <buffer>
+        vim.api.nvim_create_autocmd("BufWritePre", {
-                autocmd BufWritePre <buffer> lua vim.lsp.buf.formatting_sync()
+            group = augroup,
-            augroup END
+            buffer = bufnr,
-        ]])
+            callback = function()
+                vim.lsp.buf.format({ bufnr = bufnr })
+            end,
+        })
     end
 
     -- Mappings