improved rust LSP

neovim/.config/nvim/lua/LSPconfig.lua

@@ -35,7 +35,7 @@ end
 -- Use a loop to conveniently call 'setup' on multiple servers and
 -- map buffer local keybindings when the language server attaches
 -- the packages for these servers are: pyright, rust-analyzer, texlab, and lua-language-server
-local servers = { 'pyright', 'rust_analyzer', 'texlab'}
+local servers = { 'pyright', 'texlab'}
 for _, lsp in ipairs(servers) do
 	nvim_lsp[lsp].setup {
 		flags = {
@@ -44,6 +44,39 @@ for _, lsp in ipairs(servers) do
 	}
 end
 
+--rust configuration
+local rustOpts = {
+    tools = { -- rust-tools options
+        autoSetHints = true,
+        hover_with_actions = true,
+        inlay_hints = {
+            show_parameter_hints = false,
+            parameter_hints_prefix = "",
+            other_hints_prefix = "",
+        },
+    },
+
+    -- all the opts to send to nvim-lspconfig
+    -- these override the defaults set by rust-tools.nvim
+    -- see https://github.com/neovim/nvim-lspconfig/blob/master/doc/server_configurations.md#rust_analyzer
+    server = {
+        -- on_attach is a callback called when the language server attachs to the buffer
+        -- on_attach = on_attach,
+        settings = {
+            -- to enable rust-analyzer settings visit:
+            -- https://github.com/rust-analyzer/rust-analyzer/blob/master/docs/user/generated_config.adoc
+            ["rust-analyzer"] = {
+                -- enable clippy on save
+                checkOnSave = {
+                    command = "clippy"
+                },
+            }
+        }
+    },
+}
+
+require('rust-tools').setup(rustOpts)
+
 --lua-language-server needs seperate config.
 local runtime_path = vim.split(package.path, ';')
 table.insert(runtime_path, "lua/?.lua")